remove unused config field from User

WIP: add support container image build using local filesytem contexts or contextes generated from resource definitions
WIP: added support for the create command in the exec resource
Fix a type matching error in `types` package use of generics

.gitea/workflows/test.yaml

@@ -9,7 +9,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     container:
-      image: registry.cv.mazarbul.net/declarative/build-golang:1.22.1-alpine-x86_64
+      image: rosskeenhouse/build-golang:1.22.6-alpine
       env:
         GOPATH: /
         SSH_AUTH_SOCK: /tmp/ssh.sock
@@ -54,75 +54,3 @@ jobs:
           name: "jx-alpine"
           path: "jx"
       - run: echo "This job's status is ${{ job.status }}."
-  build-fedora:
-    runs-on: ubuntu-latest
-    container:
-      image: fedora:latest
-      env:
-        GOPATH: /
-        SSH_AUTH_SOCK: /tmp/ssh.sock
-        ENVIRONMENT: dev
-      volumes:
-        - "/etc/timezone:/etc/timezone:ro"
-        - "/etc/localtime:/etc/localtime:ro"
-        - "/etc/gitconfig:/etc/gitconfig:ro"
-        - "/opt/gitea/act_runner/.ssh/known_hosts:/root/.ssh/known_hosts"
-        - "/opt/gitea/act_runner/.gitconfig:/root/.gitconfig:ro"
-        - "/opt/gitea/act_runner/.git-credentials:/root/.git-credentials:ro"
-        - "/etc/ssl/certs:/etc/ssl/certs:ro"
-      options: --cpus 4
-    steps:
-      - run: dnf install -y nodejs git make
-      - name: Check out repository code
-        uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - run: dnf install -y dnf-plugins-core rpm-build rpmdevtools
-      - run: echo "$(pwd)/go/bin" >> $GITHUB_PATH
-      - run: dnf builddep -y build/jx.spec
-      - run: make build
-      - name: Run build
-        run: |
-          make rpm
-      - name: Archive binary
-        uses: actions/upload-artifact@v3
-        with:
-          name: "jx-fedora-40"
-          path: "jx"
-      - uses: actions/upload-artifact@v3
-        with:
-          name: "RPMS"
-          path: "/root/rpmbuild/**/*.rpm"
-      - run: echo "This job's status is ${{ job.status }}."
-  build-ubuntu-focal:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    container:
-      image: ubuntu:focal
-      env:
-        GOPATH: /
-        SSH_AUTH_SOCK: /tmp/ssh.sock
-        ENVIRONMENT: dev
-        DEBIAN_FRONTEND: noninteractive
-        TZ: America/Los_Angeles
-      volumes:
-        - "/etc/gitconfig:/etc/gitconfig:ro"
-        - "/opt/gitea/act_runner/.ssh/known_hosts:/root/.ssh/known_hosts"
-        - "/opt/gitea/act_runner/.gitconfig:/root/.gitconfig:ro"
-        - "/opt/gitea/act_runner/.git-credentials:/root/.git-credentials:ro"
-      options: --cpus 4
-    steps:
-      - run: apt-get -y update && apt-get install -y tzdata
-      - run: apt-get install -y nodejs git make
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - run: echo "$(pwd)/go/bin" >> $GITHUB_PATH
-      - run: make ubuntu-deps
-      - run: make build
-      - run: make deb
-      - uses: actions/upload-artifact@v3
-        with:
-          name: "jx-ubuntu-focal"
-          path: "jx"

Makefile

@@ -1,4 +1,7 @@
+export PATH := $(PATH):$(HOME)/go/bin
 IMAGE?=fedora:latest
+#LDFLAGS?=--ldflags '-extldflags "-static -ldl -lc -lm"' --ldflags="-X 'main.commit=$(shell git rev-parse HEAD)' -X 'main.version=$(shell git describe --tags)' -X 'main.date=$(shell date '+%Y-%m-%d %T.%s%z')'"
+export CC?=muscl-gcc
 LDFLAGS?=--ldflags '-extldflags "-static"' --ldflags="-X 'main.commit=$(shell git rev-parse HEAD)' -X 'main.version=$(shell git describe --tags)' -X 'main.date=$(shell date '+%Y-%m-%d %T.%s%z')'"
 export CGO_ENABLED=1
 VERSION?=$(shell git describe --tags | sed -e 's/^v//' -e 's/-/_/g')
@@ -13,7 +16,7 @@ test: jx-cli
 	go test -coverprofile=artifacts/coverage.profile ./...
 	go tool cover -html=artifacts/coverage.profile -o artifacts/code-coverage.html
 fedora-deps:
-	dnf install -y nodejs git dnf-plugins-core rpm-build rpmdevtools
+	./jx apply build/rpm.jx.yaml
 	spectool -g -R build/jx.spec
 	curl -L -o - https://go.dev/dl/go1.22.3.linux-amd64.tar.gz | tar -zxvf -
 rpm: fedora-deps
@@ -26,7 +29,19 @@ ubuntu-deps:
 deb: ubuntu-deps
 	:
 run:
-	docker run -it -v $(HOME)/.git-credentials:/root/.git-credentials -v $(HOME)/.gitconfig:/root/.gitconfig -v $(shell pwd):/src $(IMAGE) bash
+	docker run -it -v $(HOME)/.git-credentials:/root/.git-credentials -v $(HOME)/.gitconfig:/root/.gitconfig -v /var/run/docker.sock:/var/run/docker.sock -v $(shell pwd):/src $(IMAGE) sh
+run-alpine:
+	docker run -it -v $(HOME)/.git-credentials:/root/.git-credentials -v $(HOME)/.gitconfig:/root/.gitconfig -v /var/run/docker.sock:/var/run/docker.sock -v $(shell pwd):/src golang:1.22.6-alpine sh
+build-container:
+	docker run -it -v $(HOME)/.git-credentials:/root/.git-credentials -v $(HOME)/.gitconfig:/root/.gitconfig -v /var/run/docker.sock:/var/run/docker.sock -v $(shell pwd):/src -w /src rosskeenhouse/build-golang:1.22.6-alpine sh
 clean:
 	go clean -modcache
 	rm jx
+go-deps:
+	go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
+	go install golang.org/x/vuln/cmd/govulncheck@latest
+lint:
+	golangci-lint run --verbose ./...
+vulncheck:
+	govulncheck ./...
+	go vet ./...

README.md

@@ -8,16 +8,49 @@ These tools work with YAML descriptions of resources (E.g. files, users, contain
 
 * Go >= 1.21.1
 
+# Releases
+
+**<span style="color:red">v0 releases are unstable and changes may be made to interfaces and specifications.</span>**
+
+Use at your own risk.
+
+# JX Documents
+
+The JX YAML specification is a simple way to describe system resources.  The two main components are `configurations` and `resources`.
+
+## Configurations
+
+```
+configurations:
+- name: myhttpconfig
+  values:
+    http_user: jex
+    http_password: sample 
+- name: myhttptoken
+  values:
+    authorization_token: abcde123456789
+```
+
+## Resources
+```
+resources:
+- type: http
+  config: myhttptoken
+  transition: read
+  attributes:
+    endpoint: https://myserver/v1/api
+```
+
 # Testing
 
-Testing the current version involves checking out main and building.
+Testing the current version involves checking out main and building inside of the alpine go build container.
 
 ```
 git clone https://gitea.rosskeen.house/doublejynx/jx.git
 
-make test
+make build-container
 
-make build
+make test
 ```
 
 # Command-line
@@ -40,7 +73,13 @@ Read the state of an existing resource (URI) and generate a YAML representation
 
 `jx import -resource file://COPYRIGHT`
 
-![Import Resource](md-images/import-resource.gif)
+## Importing resources from different sources
+
+JX supports importing resources data from various source types, among these are filesystem directories, tar archive contents, containers, iptables chains, installed packages, etc.
+
+Import system packages using the debian package type, and output the resource documents in JSON format.
+
+`jx import --output json:// package://?type=deb`
 
 Import the contents of a tar archive into a resource document.
 
@@ -64,9 +103,14 @@ Read a resource document from an http endpoint.
 
 Resources:
 
-* [file](examples/file.yaml) [schema](internal/resource/schemas/file.jsonschema)
+* [container](examples/container.jx.yaml) [schema](internal/resource/schemas/container.schema.json)
-* [http](examples/http.yaml) [schema](internal/resource/schemas/http.jsonschema)
+* [container-image](examples/container-image.jx.yaml) [schema](internal/resource/schemas/container-image.schema.json)
-* [user](examples/user.yaml) [schema](internal/resource/schemas/user.jsonschema)
+* [container-network](examples/container-network.jx.yaml) [schema](internal/resource/schemas/container-network.schema.json)
-* [package](examples/package.yaml) [schema](internal/resource/schemas/package.jsonschema)
+* [exec](examples/exec.jx.yaml) [schema](internal/resource/schemas/exec.schema.json)
-* [container](examples/container.yaml) [schema](internal/resource/schemas/container.jsonschema)
+* [file](examples/file.jx.yaml) [schema](internal/resource/schemas/file.schema.json)
-* [network_route](examples/network_route.yaml) [schema](internal/resource/schemas/network_route.jsonschema)
+* [group](examples/group.jx.yaml) [schema](internal/resource/schemas/group.schema.json)
+* [http](examples/http.jx.yaml) [schema](internal/resource/schemas/http.schema.json)
+* [iptable](examples/iptable.jx.yaml) [schema](internal/resource/schemas/iptable.schema.json)
+* [network_route](examples/network_route.jx.yaml) [schema](internal/resource/schemas/network_route.schema.json)
+* [package](examples/package.jx.yaml) [schema](internal/resource/schemas/package.schema.json)
+* [user](examples/user.jx.yaml) [schema](internal/resource/schemas/user.schema.json)

build/docker/container-image-build.jx.yaml

@@ -0,0 +1,16 @@
+---
+imports:
+- /etc/jx/dockerhub.jx.yaml
+resources:
+- type: container-image
+  config: dockerhub
+  transition: update
+  attributes:
+    name: rosskeenhouse/build-golang:1.22.6-alpine
+    push: true
+    dockerfile: |-
+      FROM golang:1.22.6-alpine
+      COPY . /opt/build
+      WORKDIR /opt/build
+      RUN ./jx apply ./alpine.jx.yaml
+    contextref: file://build/docker/golang/build

build/docker/golang/build/alpine.jx.yaml

@@ -0,0 +1,36 @@
+imports:
+- file://common.jx.yaml
+resources:
+- type: package
+  transition: create
+  attributes:
+    name: musl-dev
+- type: package
+  transition: create
+  attributes:
+    name: luajit
+    verion: =~2.2
+- type: package
+  transition: create
+  attributes:
+    name: luajit-dev
+- type: package
+  transition: create
+  attributes:
+    name: protobuf
+- type: package
+  transition: create
+  attributes:
+    name: openjdk8
+- type: package
+  transition: create
+  attributes:
+    name: docker
+- type: package
+  transition: create
+  attributes:
+    name: openssh-client
+- type: package
+  transition: create
+  attributes:
+    name: golangci-lint

build/docker/golang/build/common.jx.yaml

@@ -0,0 +1,45 @@
+resources:
+- type: file
+  transition: create
+  attributes:
+    path: /usr/local/bin/antlr-4.10-complete.jar
+    sourceref: https://www.antlr.org/download/antlr-4.10-complete.jar
+    owner: root
+    group: root
+    mode: 0755
+- type: package
+  transition: create
+  attributes:
+    name: make
+- type: package
+  transition: create
+  attributes:
+    name: openssl
+- type: package
+  transition: create
+  attributes:
+    name: curl
+- type: package
+  transition: create
+  attributes:
+    name: git
+- type: package
+  transition: create
+  attributes:
+    name: gcc
+- type: exec
+  transition: create
+  attributes:
+    create:
+      path: go
+      args:
+      - install
+      - google.golang.org/protobuf/cmd/protoc-gen-go@latest
+- type: exec
+  transition: create
+  attributes:
+    create:
+      path: go
+      args:
+      - install
+      - golang.org/x/vuln/cmd/govulncheck@latest

cli_test.go

@@ -12,14 +12,35 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"fmt"
+	"decl/internal/tempdir"
+	"archive/tar"
+	"io"
+	"log"
+	"bytes"
 )
 
+var TempDir tempdir.Path = "testcli"
+
+func TestMain(m *testing.M) {
+	err := TempDir.Create()
+	if err != nil || TempDir == "" {
+		slog.Error("Failed creating temp dir", "error", err)
+	}
+        
+	rc := m.Run()
+
+	TempDir.Remove()
+	os.Exit(rc)
+} 
+
 func TestCli(t *testing.T) {
 	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
 		t.Skip("cli not built")
 	}
 	yaml, cliErr := exec.Command("./jx", "import", "--resource", "file://COPYRIGHT").Output()
-	slog.Info("TestCli", "err", cliErr)
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
 	assert.Nil(t, cliErr)
 	assert.NotEqual(t, "", string(yaml))
 	assert.Greater(t, len(yaml), 0)
@@ -47,7 +68,218 @@ resources:
 	defer ts.Close()
 
 	yaml, cliErr := exec.Command("./jx", "import", "--resource", ts.URL).Output()
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
 	assert.Nil(t, cliErr)
 	assert.NotEqual(t, "", string(yaml))
 	assert.Greater(t, len(yaml), 0)
 }
+
+func TestCliConfigSource(t *testing.T) {
+	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
+		t.Skip("cli not built")
+	}
+
+	configYaml := `
+configurations:
+- name: myhttpconnection
+  values:
+    http_user: foo
+    http_pass: bar
+`
+
+	configPath := fmt.Sprintf("%s/testconfig.jx.yaml", TempDir)
+	f, err := os.Create(configPath)
+	assert.Nil(t, err)
+	defer f.Close()
+	_, writeErr := f.Write([]byte(configYaml))
+	assert.Nil(t, writeErr)
+
+	yaml, cliErr := exec.Command("./jx", "import", "--config", configPath, "--resource", "file://COPYRIGHT").Output()
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
+	assert.Nil(t, cliErr)
+	slog.Info("TestConfigSource", "yaml", yaml)
+}
+
+func TestCliConfigCommand(t *testing.T) {
+	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
+		t.Skip("cli not built")
+	}
+
+	yaml, cliErr := exec.Command("./jx", "config", "file://examples/config/file.jx.yaml").Output()
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
+	assert.Nil(t, cliErr)
+	slog.Info("TestConfigCommand", "yaml", yaml)
+	assert.NotEqual(t, "", string(yaml))
+	assert.Greater(t, len(yaml), 0)
+}
+
+func TestCliImportPackageCommand(t *testing.T) {
+	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
+		t.Skip("cli not built")
+	}
+
+	yaml, cliErr := exec.Command("./jx", "import", "package://").Output()
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
+	assert.Nil(t, cliErr)
+	assert.NotEqual(t, "", string(yaml))
+	assert.Greater(t, len(yaml), 0)
+}
+
+func TestCliExportTar(t *testing.T) {
+	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
+		t.Skip("cli not built")
+	}
+	assert.Nil(t, TempDir.Mkdir("tar", 0755))
+	assert.Nil(t, TempDir.CreateFile("tar/foo", "data"))
+	assert.Nil(t, TempDir.CreateFile("tar/bar", "data"))
+
+	cmdArgs := []string{"import", "--output", "tar://-", fmt.Sprintf("file://%s/tar", TempDir)}
+	slog.Info("TestCliExportTar()", "cmd", cmdArgs)
+	cmd := exec.Command("./jx", cmdArgs...)
+	slog.Info("TestCliExportTar()", "cmd", cmd)
+	stderr, errerr := cmd.StderrPipe()
+	assert.Nil(t, errerr)
+	stdout, outerr := cmd.StdoutPipe()
+	assert.Nil(t, outerr)
+
+	assert.Nil(t, cmd.Start())
+
+	errOutput, _ := io.ReadAll(stderr)
+	tarData, _ := io.ReadAll(stdout)
+
+	assert.Nil(t, cmd.Wait())
+
+	slog.Info("TestCliExportTar()", "stderr", errOutput)
+
+	assert.Greater(t, len(tarData), 0)
+
+	tr := tar.NewReader(bytes.NewBuffer(tarData))
+
+	files := []string{fmt.Sprintf("%s/tar/foo", TempDir), fmt.Sprintf("%s/tar/bar", TempDir)}
+	for {
+		hdr, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			log.Fatal(err)
+		}
+		assert.Contains(t, files, hdr.Name)
+		contents, err := io.ReadAll(tr)
+		assert.Nil(t, err)
+		assert.Equal(t, []byte("data"), contents)
+	}
+}
+
+func TestResourcesRead(t *testing.T) {
+	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
+		t.Skip("cli not built")
+	}
+
+
+	server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		defer req.Body.Close()
+		assert.Equal(t, req.URL.String(), "/resource/user")
+		_, err := io.ReadAll(req.Body)
+		assert.Nil(t, err)
+		userdecl := []byte(`
+type: "user"
+attributes:
+  name: "foo"
+  gecos: "foo user"
+`)
+
+		_, writeErr := rw.Write(userdecl)
+		assert.Nil(t, writeErr)
+	}))
+	defer server.Close()
+	
+
+	assert.Nil(t, TempDir.CreateFile("testread", "data"))
+
+resources := fmt.Sprintf(`
+resources:
+- type: file
+  transition: read
+  attributes:
+    path: %s
+- type: user
+  transition: read
+  attributes:
+    name: nobody
+- type: group
+  transition: read
+  attributes:
+    name: wheel
+- type: container
+  transition: read
+  attributes:
+    name: builder
+- type: container-network
+  transition: read
+  attributes:
+    name: default
+- type: container-image
+  transition: read
+  attributes:
+    name: nginx:latest
+- type: http
+  transition: read
+  attributes:
+    endpoint: %s/resource/user
+- type: route
+  transition: read
+  attributes:
+    to: 0.0.0.0
+    gateway: 172.17.0.1
+    interface: eth0
+    proto: static
+    scope: global
+    rtid: all
+    routetype: local
+    metric: 100
+`, TempDir.FilePath("testread"), server.URL)
+
+	assert.Nil(t, TempDir.CreateFile("resources.jx.yaml", resources))
+
+	yaml, cliErr := exec.Command("./jx", "apply", TempDir.FilePath("resources.jx.yaml")).Output()
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
+	assert.Nil(t, cliErr)
+	assert.NotEqual(t, "", string(yaml))
+	assert.Greater(t, len(yaml), 0)
+}
+
+func TestFailedResources(t *testing.T) {
+	if _, e := os.Stat("./jx"); errors.Is(e, os.ErrNotExist) {
+		t.Skip("cli not built")
+	}
+	os.Unsetenv("JX_DEBUG")
+resources := `
+resources:
+- type: package
+  transition: create
+  attributes:
+    name: foobarbaz
+`
+
+	assert.Nil(t, TempDir.CreateFile("err.jx.yaml", resources))
+
+	yaml, cliErr := exec.Command("./jx", "apply", TempDir.FilePath("err.jx.yaml")).Output()
+	if cliErr != nil {
+		slog.Info("Debug CLI error", "error", cliErr, "stderr", cliErr.(*exec.ExitError).Stderr)
+	}
+
+	assert.NotNil(t, cliErr)
+	assert.NotEqual(t, "", string(yaml))
+	assert.Contains(t, string(cliErr.(*exec.ExitError).Stderr), "Document errors: 1")
+}

cmd/cli/main.go

@@ -4,18 +4,20 @@ package main
 
 import (
 	"context"
-	"io"
+	"decl/internal/data"
-  "os"
+_	"decl/internal/config"
-  "flag"
+	"decl/internal/folio"
-	"log/slog"
+_	"decl/internal/resource"
+_	"decl/internal/fan"
+	"decl/internal/builtin"
 _	"errors"
+	"flag"
 	"fmt"
-_ "gopkg.in/yaml.v3"
+_	"gopkg.in/yaml.v3"
-	"decl/internal/resource"
+	"io"
-	"decl/internal/source"
+	"log/slog"
-	"decl/internal/target"
+	"os"
-	"decl/internal/codec"
+	"decl/internal/client"
-	"net/url"
 )
 
 const (
@@ -25,10 +27,12 @@ const (
 
 var (
 	version string
-	commit	string
+	commit  string
-	date		string
+	date    string
 )
 
+var Client *client.App = client.NewClient()
+
 var GlobalOformat *string
 var GlobalOutput string
 var GlobalQuiet *bool
@@ -38,6 +42,9 @@ var ImportResource *string
 
 var ApplyDelete *bool
 
+var ConfigPath string
+
+var ConfigDoc data.Document = folio.DocumentRegistry.NewDocument("")
 
 var ctx context.Context = context.Background()
 
@@ -45,21 +52,25 @@ type RunCommand func(cmd *flag.FlagSet, output io.Writer) error
 
 type SubCommand struct {
 	Name string
-	Run RunCommand
+	Run  RunCommand
 }
 
-var jxSubCommands = []SubCommand {
+var jxSubCommands = []SubCommand{
 	{
 		Name: "diff",
-		Run: DiffSubCommand,
+		Run:  DiffSubCommand,
 	},
 	{
 		Name: "apply",
-		Run: ApplySubCommand,
+		Run:  ApplySubCommand,
 	},
 	{
 		Name: "import",
-		Run: ImportSubCommand,
+		Run:  ImportSubCommand,
+	},
+	{
+		Name: "config",
+		Run:  ConfigSubCommand,
 	},
 }
 
@@ -74,27 +85,26 @@ func LoggerConfig() {
 	var programLevel = new(slog.LevelVar)
 	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: programLevel}))
 	slog.SetDefault(logger)
-	if debugLogging,ok := os.LookupEnv("JX_DEBUG"); ok && debugLogging != "" {
+	if debugLogging, ok := os.LookupEnv("JX_DEBUG"); ok && debugLogging != "" {
 		programLevel.Set(slog.LevelDebug)
 	} else {
 		programLevel.Set(slog.LevelError)
 	}
 }
 
-func LoadSourceURI(uri string) []*resource.Document {
+func ConfigSubCommand(cmd *flag.FlagSet, output io.Writer) (err error) {
-	slog.Info("loading ", "uri", uri)
+	if err = cmd.Parse(os.Args[2:]); err != nil {
-	if uri != "" {
+		return
-		ds, err := source.SourceTypes.New(uri)
-		if err != nil {
-			slog.Error("Failed loading document from source", "error", err)
-		}
-		extractDocuments, extractErr := ds.ExtractResources(nil)
-		if extractErr != nil {
-			slog.Error("Failed loading resources from source", "error", extractErr)
-		}
-		return extractDocuments
 	}
-	return []*resource.Document{ resource.NewDocument() }
+
+	if err = Client.SetOutput(GlobalOutput); err == nil {
+		if configErr := Client.SystemConfiguration(ConfigPath); configErr != nil {
+			slog.Info("Main.Import - SystemConfiguration", "config", ConfigPath, "error", configErr)
+		}
+		err = Client.ConfigCmd(cmd.Args(), true)
+	}
+
+	return
 }
 
 func ImportSubCommand(cmd *flag.FlagSet, output io.Writer) (err error) {
@@ -104,77 +114,14 @@ func ImportSubCommand(cmd *flag.FlagSet, output io.Writer) (err error) {
 	if e != nil { // returns ErrHelp
 		return e
 	}
-
+	if err = Client.SetOutput(GlobalOutput); err == nil {
-	merged := resource.NewDocument()
+		if configErr := Client.SystemConfiguration(ConfigPath); configErr != nil {
-	documents := make([]*resource.Document, 0, 100)
+			slog.Info("Main.Import - SystemConfiguration", "config", ConfigPath, "error", configErr)
-	for _,source := range cmd.Args() {
-		loaded :=  LoadSourceURI(source)
-		if loaded != nil {
-			documents = append(documents, loaded...)
 		}
-	}
 
-/*
+		err = Client.ImportCmd(ctx, cmd.Args(), *ImportResource, *GlobalQuiet, *ImportMerge)
-	switch *GlobalOformat {
-	case FormatYaml:
-		encoder = resource.NewYAMLEncoder(output)
-	case FormatJson:
-		encoder = resource.NewJSONEncoder(output)
 	}
-*/
+	return
-
-	slog.Info("main.ImportResource", "args", os.Args, "output", GlobalOutput)
-	outputTarget, err := target.TargetTypes.New(GlobalOutput)
-	if err != nil {
-		slog.Error("Failed opening target", "error", err)
-	}
-	defer outputTarget.Close()
-
-	if len(documents) == 0 {
-		documents = append(documents, resource.NewDocument())
-	}
-
-	for _,d := range documents {
-		if d != nil {
-
-			if *ImportResource != "" {
-				slog.Info("ImportResource", "resource", ImportResource)
-				resourceUri, uriErr := url.Parse(*ImportResource)
-				if uriErr != nil {
-					slog.Error("Failed adding resource", "error", uriErr)
-				}
-				if resourceUri.Scheme == "" {
-					resourceUri.Scheme = "file"
-				}
-				if addResourceErr := d.AddResource(resourceUri.String()); addResourceErr != nil {
-					slog.Error("Failed adding resource", "error", addResourceErr)
-				}
-			}
-
-			if *GlobalQuiet {
-				for _, dr := range d.Resources() {
-					if _,e := output.Write([]byte(dr.Resource().URI())); e != nil {
-						return e
-					}
-				}
-			} else {
-				if *ImportMerge {
-					merged.ResourceDecls = append(merged.ResourceDecls, d.ResourceDecls...)
-				} else {
-					slog.Info("main.ImportResource", "outputTarget", outputTarget, "type", outputTarget.Type())
-					if outputErr := outputTarget.EmitResources([]*resource.Document{d}, nil); outputErr != nil {
-						return outputErr
-					}
-				}
-			}
-		}
-	}
-	if *ImportMerge {
-		if outputErr := outputTarget.EmitResources([]*resource.Document{merged}, nil); outputErr != nil {
-			return outputErr
-		}
-	}
-	return err
 }
 
 func ApplySubCommand(cmd *flag.FlagSet, output io.Writer) (err error) {
@@ -182,109 +129,27 @@ func ApplySubCommand(cmd *flag.FlagSet, output io.Writer) (err error) {
 	if e := cmd.Parse(os.Args[2:]); e != nil {
 		return e
 	}
-	var encoder codec.Encoder
-	documents := make([]*resource.Document, 0, 100)
-	for _,source := range cmd.Args() {
-		loaded :=  LoadSourceURI(source)
-		if loaded != nil {
-			documents = append(documents, loaded...)
-		}
-	}
 
-	slog.Info("main.Apply()", "documents", documents)
+	if err = Client.SetOutput(GlobalOutput); err == nil {
-	for _,d := range documents {
+		if configErr := Client.SystemConfiguration(ConfigPath); configErr != nil {
-		slog.Info("main.Apply()", "doc", d)
+			slog.Info("Main.Import - SystemConfiguration", "config", ConfigPath, "error", configErr)
-		var overrideState string = ""
-		if *ApplyDelete {
-			overrideState = "delete"
-		}
-		d.ResolveIds(ctx)
-		if e := d.Apply(overrideState); e != nil {
-			slog.Info("main.Apply() error", "error", e)
-			return e
 		}
 
-		switch *GlobalOformat {
+		err = Client.ApplyCmd(ctx, cmd.Args(), *GlobalQuiet, *ApplyDelete)
-		case FormatYaml:
-			encoder = codec.NewYAMLEncoder(output)
-		case FormatJson:
-			encoder = codec.NewJSONEncoder(output)
-		}
-		if *GlobalQuiet {
-			for _, dr := range d.Resources() {
-				if _,e := output.Write([]byte(dr.Resource().URI())); e != nil {
-					return e
-				}
-			}
-		} else {
-			if documentGenerateErr := encoder.Encode(d); documentGenerateErr != nil {
-				return documentGenerateErr
-			}
-		}
 	}
-	return err
+	return
 }
 
 func DiffSubCommand(cmd *flag.FlagSet, output io.Writer) (err error) {
 	if e := cmd.Parse(os.Args[2:]); e != nil {
 		return e
 	}
-	leftSource := cmd.Arg(0)
-	rightSource := cmd.Arg(1)
-	leftDocuments := make([]*resource.Document, 0, 100)
-	rightDocuments := make([]*resource.Document, 0, 100)
 	
-	slog.Info("jx diff subcommand", "left", leftSource, "right", rightSource, "flagset", cmd)
+	return Client.DiffCmd(cmd.Args())
-
-	if rightSource == "" {
-		rightDocuments = append(rightDocuments, LoadSourceURI(leftSource)...)
-		slog.Info("jx diff clone", "docs", rightDocuments)
-		for i, doc := range rightDocuments {
-			if doc != nil {
-				leftDocuments = append(leftDocuments, doc.Clone())
-				for _,resourceDeclaration := range leftDocuments[i].Resources() {
-					if _, e := resourceDeclaration.Resource().Read(ctx); e != nil {
-						slog.Info("jx diff ", "err", e)
-						//return e
-					}
-				}
-			}
-		}
-	} else {
-		leftDocuments = append(leftDocuments, LoadSourceURI(leftSource)...)
-		rightDocuments = append(rightDocuments, LoadSourceURI(rightSource)...)
-	}
-
-	slog.Info("jx diff ", "right", rightDocuments, "left", leftDocuments)
-	index := 0
-	for {
-		if index >= len(rightDocuments) && index >= len(leftDocuments) {
-			break
-		}
-		if index >= len(rightDocuments) {
-			if _,e := leftDocuments[index].Diff(resource.NewDocument(), output); e != nil {
-				return e
-			}
-			index++
-			continue
-		}
-		if index >= len(leftDocuments) {
-			if _,e := resource.NewDocument().Diff(rightDocuments[index], output); e != nil {
-				return e
-			}
-			index++
-			continue
-		}
-		if _,e := leftDocuments[index].Diff(rightDocuments[index], output); e != nil {
-			return e
-		}
-		index++
-	}
-	return err
 }
 
-func main() {
 
+func main() {
 	LoggerConfig()
 
 	if len(os.Args) < 2 {
@@ -292,8 +157,19 @@ func main() {
 		os.Exit(1)
 	}
 
-	for _,subCmd := range jxSubCommands {
+	DefaultConfigurations, configErr := builtin.BuiltInDocuments()
+	if configErr != nil {
+		slog.Warn("Failed loading default configuration", "error", configErr)
+	}
+
+	ConfigDoc.AppendConfigurations(DefaultConfigurations)
+
+	for _, subCmd := range jxSubCommands {
 		cmdFlagSet := flag.NewFlagSet(subCmd.Name, flag.ExitOnError)
+
+		cmdFlagSet.StringVar(&ConfigPath, "config", "/etc/jx/conf.d", "Config file path")
+		cmdFlagSet.StringVar(&ConfigPath, "c", "/etc/jx/conf.d", "Config file path")
+
 		GlobalOformat = cmdFlagSet.String("oformat", "yaml", "Output serialization format")
 		cmdFlagSet.StringVar(&GlobalOutput, "output", "-", "Output target (default stdout)")
 		cmdFlagSet.StringVar(&GlobalOutput, "o", "-", "Output target (default stdout)")
@@ -318,10 +194,18 @@ func main() {
 				cmdFlagSet.PrintDefaults()
 				VersionUsage()
 			}
+		case "config":
+			cmdFlagSet.Usage = func() {
+				fmt.Println("jx config source...")
+				cmdFlagSet.PrintDefaults()
+				VersionUsage()
+			}
 		}
+		slog.Info("CLI", "cmd", subCmd.Name)
 		if os.Args[1] == subCmd.Name {
 			if e := subCmd.Run(cmdFlagSet, os.Stdout); e != nil {
 				slog.Error("Failed running command", "command", os.Args[1], "error", e)
+				os.Exit(1)
 			}
 			return
 		}

cmd/cli/main_test.go

@@ -0,0 +1,26 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package main
+
+import (
+_	"github.com/stretchr/testify/assert"
+	"testing"
+_	"decl/internal/folio"
+_	"decl/internal/data"
+_	"log/slog"
+)
+
+func TestLoadSourceURIConverter(t *testing.T) {
+/*
+	var uri folio.URI = "file://../../examples/file.jx.yaml"
+	docs, err := LoadSourceURIConverter(uri)
+	assert.Nil(t, err)
+	assert.Greater(t, len(docs), 0)
+	slog.Info("TestLoadSourceURIConverter", "doc", docs[0], "resource", docs[0].(*folio.Document).ResourceDeclarations[0].Attributes)
+	resDecl := docs[0].(*folio.Document).ResourceDeclarations[0]
+	assert.Equal(t, "file", resDecl.Attributes.Type())
+	v, ok := docs[0].Get("file:///tmp/foo.txt")
+	assert.True(t, ok)
+	assert.Equal(t, "/tmp/foo.txt", v.(data.Declaration).Resource().(data.FileResource).FilePath())
+*/
+}

examples/certificate.jx.yaml

@@ -0,0 +1,15 @@
+resources:
+- type: pki
+  transition: create
+  config: myca
+  attributes:
+    privatekeyref: file://myca_privkey.pem
+    publickeyref: file://myca_pubkey.pem
+    certificateref: file://myca_cert.pem
+- type: pki
+  transition: update
+  attributes:
+    signedbyref: pki://myca_privkey.pem
+    privatekeyref: file://mycert_key.pem
+    publickeyref: file://mycert_pubkey.pem
+    certificateref: file://mycert.pem

examples/config/cert.cfg.jx.yaml

@@ -0,0 +1,43 @@
+configurations:
+- name: myca
+  type: certificate
+  values:
+    certtemplate:
+      serialnumber: 2024
+      subject:
+        organization:
+        - RKH
+        country:
+        - US
+        province:
+        - CA
+        locality:
+        - San Francisco
+        streetaddress:
+        - 0 cert st
+        postalcode:
+        - 94101
+      notbefore: 2024-07-10
+      notafter: 2025-07-10
+      basicconstraintsvalid: true
+      isca: true
+- name: mycert
+  type: certificate
+  values:
+    certtemplate:
+      serialnumber: 2025
+      subject:
+        organization:
+        - RKH
+        country:
+        - US
+        province:
+        - CA
+        locality:
+        - San Francisco
+        streetaddress:
+        - 0 cert st
+        postalcode:
+        - 94101
+      notbefore: 2024-07-10
+      notafter: 2025-07-10

examples/config/file.jx.yaml

@@ -0,0 +1,4 @@
+configurations:
+- name: myfiles
+  values:
+    prefix: /home/testuser

examples/container-image.jx.yaml

@@ -0,0 +1,5 @@
+resources:
+- type: container-image
+  transition: read
+  attributes:
+    name: nginx:latest

examples/file.jx.yaml

@@ -1,8 +1,8 @@
 resources:
 - type: file
+  transition: create
   attributes:
     path: /tmp/foo.txt
     owner: nobody
-    group: nobody
     mode: 0644
     state: present

examples/golang.jx.yaml

@@ -0,0 +1,6 @@
+resources:
+- type: file
+  transition: create
+  attributes:
+    path: go1.22.5.linux-amd64.tar.gz
+    sourceref: https://go.dev/dl/go1.22.5.linux-amd64.tar.gz

examples/golangci-lint.jx.yaml

@@ -0,0 +1,12 @@
+resources:
+- type: file
+  transition: create
+  attributes:
+    path: golangci-lint-1.55.2-linux-amd64.deb
+    sourceref: https://github.com/golangci/golangci-lint/releases/download/v1.55.2/golangci-lint-1.55.2-linux-amd64.deb
+- type: package
+  transition: create
+  attributes:
+    name: golangci-lint
+    source: golangci-lint-1.55.2-linux-amd64.deb
+    type: deb

examples/group.jx.yaml

@@ -0,0 +1,6 @@
+resources:
+- type: group
+  transition: create
+  attributes:
+    name: "testgroup"
+    gid: "12001"

examples/iptable.jx.yaml

@@ -0,0 +1,11 @@
+resources:
+- type: iptable
+  transition: create
+  attributes:
+    id: 1
+    table: filter
+    chain: INPUT
+    jump: LIBVIRT_INP
+    state: present
+    resourcetype: rule
+

examples/package.jx.yaml

@@ -0,0 +1,9 @@
+resources:
+ - type: package
+   transition: create
+   attributes:
+     name: zip
+     version: 3.0-12build2
+     type: apt
+     state: present
+

examples/user.jx.yaml

@@ -1,7 +1,7 @@
 resources:
 - type: user
+  transition: create
   attributes:
     name: "testuser"
     uid: "12001"
     home: "/home/testuser"
-    state: present

go.mod

@@ -1,11 +1,11 @@
 module decl
 
-go 1.22.1
+go 1.22.5
 
 require (
-	gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240513200425-f413d8adf7b3
+	//	gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240513200425-f413d8adf7b3
 	gitea.rosskeen.house/rosskeen.house/machine v0.0.0-20240520193117-1835255b6d02
-	github.com/docker/docker v25.0.5+incompatible
+	github.com/docker/docker v27.0.3+incompatible
 	github.com/docker/go-connections v0.5.0
 	github.com/opencontainers/image-spec v1.1.0
 	github.com/sters/yaml-diff v1.3.2
@@ -14,8 +14,13 @@ require (
 	gopkg.in/yaml.v3 v3.0.1
 )
 
+require google.golang.org/protobuf v1.33.0
+
 require (
+	gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240924031921-4d00743b53e1 // indirect
 	github.com/Microsoft/go-winio v0.4.14 // indirect
+	github.com/ProtonMail/go-crypto v1.0.0 // indirect
+	github.com/cloudflare/circl v1.3.3 // indirect
 	github.com/containerd/log v0.1.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/distribution/reference v0.5.0 // indirect
@@ -28,6 +33,7 @@ require (
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/moby/docker-image-spec v1.3.1 // indirect
 	github.com/moby/term v0.5.0 // indirect
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
@@ -41,7 +47,9 @@ require (
 	go.opentelemetry.io/otel/metric v1.25.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.25.0 // indirect
 	go.opentelemetry.io/otel/trace v1.25.0 // indirect
-	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/crypto v0.24.0 // indirect
+	golang.org/x/net v0.26.0 // indirect
+	golang.org/x/sys v0.21.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
 	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
 	gotest.tools/v3 v3.5.1 // indirect

go.sum

@@ -1,15 +1,20 @@
 gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240513200425-f413d8adf7b3 h1:ge74Hmzxp+bqVwSK9hOOBlZB9KeL3xuwMIXAYLPHBxA=
 gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240513200425-f413d8adf7b3/go.mod h1:9sKIXsGDcf1uBnHhY29wi38Vll8dpVNUOxkXphN2KEk=
+gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240924031921-4d00743b53e1 h1:UT79l0TvkYjlAbJrsFIm6R0tL+Rl/814ThKbjOgrTPo=
+gitea.rosskeen.house/pylon/luaruntime v0.0.0-20240924031921-4d00743b53e1/go.mod h1:9sKIXsGDcf1uBnHhY29wi38Vll8dpVNUOxkXphN2KEk=
 gitea.rosskeen.house/rosskeen.house/machine v0.0.0-20240520193117-1835255b6d02 h1:FLRmUvu0mz8Ac+/VZf/P4yuv2e6++SSkKOcEIHSlpAI=
 gitea.rosskeen.house/rosskeen.house/machine v0.0.0-20240520193117-1835255b6d02/go.mod h1:5J2OFjFIBaCfsjcC9kSyycbIL8g/qAJH2A8BnbIig+Y=
-gitea.rosskeen.house/rosskeen.house/testing v0.0.0-20240509163950-64f2fc3e00d5 h1:1TUeKrJ12K6+Iobc8rpL/gUaGPFBmTqKjJnkT+2B5nM=
-gitea.rosskeen.house/rosskeen.house/testing v0.0.0-20240509163950-64f2fc3e00d5/go.mod h1:gbxopbzqpz0ZMAcsPu2XqtprOoFdxwTGz45p06zuI0A=
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
 github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/ProtonMail/go-crypto v1.0.0 h1:LRuvITjQWX+WIfr930YHG2HNfjR1uOfyf5vE0kC2U78=
+github.com/ProtonMail/go-crypto v1.0.0/go.mod h1:EjAoLdwvbIOoOQr3ihjnSoLZRtE8azugULFRteWMNc0=
+github.com/bwesterb/go-ristretto v1.2.3/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
 github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
+github.com/cloudflare/circl v1.3.3 h1:fE/Qz0QdIGqeWfnwq0RE0R7MI51s0M2E4Ga9kq5AEMs=
+github.com/cloudflare/circl v1.3.3/go.mod h1:5XYMA4rFBvNIrhs50XuiBJ15vF2pZn4nnUKZrLbUZFA=
 github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I=
 github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3EhrzVo=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -17,8 +22,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/distribution/reference v0.5.0 h1:/FUIFXtfc/x2gpa5/VGfiGLuOIdYa1t65IKK2OFGvA0=
 github.com/distribution/reference v0.5.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
-github.com/docker/docker v25.0.5+incompatible h1:UmQydMduGkrD5nQde1mecF/YnSbTOaPeFIeP5C4W+DE=
+github.com/docker/docker v27.0.3+incompatible h1:aBGI9TeQ4MPlhquTQKq9XbK79rKFVwXNUAYz9aXyEBE=
-github.com/docker/docker v25.0.5+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v27.0.3+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.5.0 h1:USnMq7hx7gwdVZq1L49hLXaFtUdTADjXGp+uj1Br63c=
 github.com/docker/go-connections v0.5.0/go.mod h1:ov60Kzw0kKElRwhNs9UlUHAE/F9Fe6GLaXnqyDdmEXc=
 github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
@@ -58,6 +63,8 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/moby/docker-image-spec v1.3.1 h1:jMKff3w6PgbfSa69GfNg+zN/XLhfXJGnEx3Nl2EsFP0=
+github.com/moby/docker-image-spec v1.3.1/go.mod h1:eKmb5VW8vQEh/BAr2yvVNvuiJuY6UIocYsFu/DxxRpo=
 github.com/moby/term v0.5.0 h1:xt8Q1nalod/v7BqbG21f8mQPqH+xAaC9C3N3wfWbVP0=
 github.com/moby/term v0.5.0/go.mod h1:8FzsFHVUBGZdbDsJw/ot+X+d5HLUbvklYLJ9uGfcI3Y=
 github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
@@ -92,6 +99,7 @@ github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17
 github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0 h1:jq9TW8u3so/bN+JPT166wjOI6/vQPF6Xe7nMNIltagk=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0/go.mod h1:p8pYQP+m5XfbZm9fxtSKAbM6oIllS7s2AfxrChvc7iw=
 go.opentelemetry.io/otel v1.25.0 h1:gldB5FfhRl7OJQbUHt/8s0a7cE8fbsPAtdpRaApKy4k=
@@ -111,38 +119,68 @@ go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7e
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.7.0 h1:AvwMYaRytfdeVt3u6mLaxYtErKYjxA2OXjJ1HHq6t3A=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.3.1-0.20221117191849-2c476679df9a/go.mod h1:hebNnKkNXi2UzZN1eVRvBB7co0a+JxK6XbPiWVs/3J4=
 golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
+golang.org/x/crypto v0.24.0 h1:mnl8DM0o513X8fdIkmyFE/5hTYxbwYOjDS/+rK6qpRI=
+golang.org/x/crypto v0.24.0/go.mod h1:Z1PMYSOR5nyMcyAVAIQSKCDwalqy85Aqn1x3Ws4L5DM=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
+golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
+golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
-golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
 golang.org/x/time v0.5.0 h1:o7cqy6amK/52YcAKIPlM3a+Fpj35zvRj2TP+e1xFSfk=
 golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

internal/builtin/builtin.go

@@ -0,0 +1,69 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package builtin
+
+import (
+_	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+_	"net/url"
+_	"regexp"
+_	"strings"
+_	"os"
+_	"io"
+_	"compress/gzip"
+_	"archive/tar"
+_	"errors"
+_	"path/filepath"
+_	"decl/internal/codec"
+	"decl/internal/data"
+	"decl/internal/fs"
+	"decl/internal/folio"
+_ "decl/internal/resource"
+_ "decl/internal/config"
+_ "decl/internal/fan"
+	"embed"
+	"log/slog"
+)
+
+//go:embed documents/*.jx.yaml
+var documentFiles embed.FS
+
+func Load(uri folio.URI) (documents []data.Document, err error) {
+	var extractor data.Converter
+	var sourceResource data.Resource
+	if extractor, err = folio.DocumentRegistry.ConverterTypes.New(string(uri)); err == nil {
+		slog.Info("builtin.Load() extractor", "uri", uri, "error", err)
+
+		targetDeclaration := folio.NewDeclaration()
+		if err = targetDeclaration.NewResource((*string)(&uri)); err == nil {
+			slog.Info("builtin.Load() extract many", "resource", sourceResource, "error", err, "uri", uri, "extractor", extractor)
+			sourceResource = targetDeclaration.Attributes
+			sourceResource.(data.FileResource).SetFS(documentFiles)
+			documents, err = extractor.(data.ManyExtractor).ExtractMany(sourceResource, nil)
+			slog.Info("builtin.Load() extract many", "resource", sourceResource, "error", err)
+		}
+	}
+	return
+}
+
+func BuiltInDocuments() (documents []data.Document, err error) {
+
+	docFs := fs.NewWalkDir(documentFiles, "", func(fsys fs.FS, path string, file fs.DirEntry) (walkErr error) {
+		u := folio.URI(fmt.Sprintf("file://%s", path))
+		slog.Info("BuiltInDocuments()", "file", u)
+
+		if ! file.IsDir() {
+			if loadDocs, loadErr := Load(u); loadErr == nil {
+				documents = append(documents, loadDocs...)
+			} else {
+				err = loadErr
+			}
+		}
+		return
+	})
+
+	docFs.Walk(nil)
+	return documents, err
+}

internal/builtin/builtin_test.go

@@ -0,0 +1,59 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package builtin
+
+import (
+	"github.com/stretchr/testify/assert"
+	"log/slog"
+	"os"
+	"testing"
+	"decl/internal/tempdir"
+	"decl/internal/folio"
+	"errors"
+)
+
+var TempDir tempdir.Path = "testbuiltin"
+
+func TestMain(m *testing.M) {
+	err := TempDir.Create()
+	if err != nil || TempDir == "" {
+		slog.Error("Failed creating temp dir", "error", err)
+	}
+        
+	rc := m.Run()
+
+	TempDir.Remove()
+	os.Exit(rc)
+}
+
+func TestBuiltInLoad(t *testing.T) {
+	docs, err := Load("file://documents/facter.jx.yaml")
+	if ! errors.Is(err, os.ErrNotExist) {
+		assert.Nil(t, err)
+		assert.Greater(t, len(docs), 0)
+	}
+}
+
+func TestBuiltInDocuments(t *testing.T) {
+	docs, err := BuiltInDocuments()
+	assert.Greater(t, len(docs), 0)
+	if ! errors.Is(err, os.ErrNotExist) {
+		assert.Nil(t, err)
+		config, ok := folio.DocumentRegistry.GetDocument("file://documents/facter.jx.yaml")
+
+		assert.True(t, ok)
+
+		slog.Info("TestBuiltInDocuments()", "docuemnt", config)
+
+		assert.True(t, config.HasConfig("facts"))
+		c := config.GetConfig("facts")
+		v, e := c.GetValue("virtual")
+		assert.Nil(t, e)
+		assert.Equal(t, "physical", v)
+	}
+
+	systemConfig, systemExists := folio.DocumentRegistry.GetDocument("file://documents/system.jx.yaml")
+	assert.True(t, systemExists)
+	
+	assert.True(t, systemConfig.HasConfig("system"))
+}

internal/builtin/documents/config.jx.yaml

@@ -0,0 +1,54 @@
+configurations:
+- name: confdir
+  values:
+    prefix: /etc/jx
+resources:
+- type: group
+  transition: create
+  onerror: stop
+  attributes:
+    name: "jx"
+- type: file
+  transition: update
+  attributes:
+    path: "/etc/jx"
+    owner: "root"
+    group: "root"
+    mode: "0755"
+    filetype: directory
+- type: file
+  transition: update
+  config: confdir
+  attributes:
+    path: "conf.d"
+    owner: "root"
+    group: "jx"
+    mode: "0770"
+    filetype: directory
+- type: file
+  transition: update
+  config: confdir
+  attributes:
+    path: "lib"
+    owner: "root"
+    group: "jx"
+    mode: "0770"
+    filetype: directory
+- type: file
+  transition: update
+  config: confdir
+  attributes:
+    path: "pki"
+    owner: "root"
+    group: "jx"
+    mode: "0770"
+    filetype: directory
+- type: file
+  transition: update
+  config: confdir
+  attributes:
+    path: "pki/ca"
+    owner: "root"
+    group: "jx"
+    mode: "0770"
+    filetype: directory

internal/builtin/documents/facter.jx.yaml

@@ -0,0 +1,9 @@
+configurations:
+- name: facts
+  type: exec
+  values:
+    path: /usr/bin/facter
+    args:
+      - "-j"
+    format: "json"
+    

internal/builtin/documents/install.jx.yaml

@@ -0,0 +1,16 @@
+imports:
+- file://documents/config.jx.yaml
+configurations:
+- name: bindir
+  values:
+    prefix: /usr/local/bin
+resources:
+- type: file
+  transition: update
+  config: bindir
+  attributes:
+    path: "jx"
+    owner: "root"
+    group: "root"
+    mode: "0755"
+    sourceref: file://jx

internal/builtin/documents/system.jx.yaml

@@ -0,0 +1,4 @@
+configurations:
+- name: system
+  type: system
+  values: {}

internal/client/client.go

@@ -0,0 +1,390 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package client
+
+import (
+	"decl/internal/data"
+	"decl/internal/folio"
+_	"decl/internal/fan"
+_	"decl/internal/config"
+_	"decl/internal/resource"
+	"decl/internal/fs"
+	"decl/internal/builtin"
+	"errors"
+	"fmt"
+	"context"
+	"log/slog"
+	"os"
+)
+
+
+var (
+	ErrFailedResources error = errors.New("Failed Resources")
+	ErrFailedDocuments error = errors.New("Document errors")
+)
+
+type App struct {
+	Target folio.URI
+	ImportedMap map[folio.URI]data.Document
+	Documents []data.Document
+	emitter data.Converter
+	merged data.Document
+	Config data.Document
+}
+
+func NewClient() *App {
+	a := &App{ ImportedMap: make(map[folio.URI]data.Document), Documents: make([]data.Document, 0, 100) }
+	return a
+}
+
+// Load compiled-in config documents.
+func (a *App) BuiltInConfiguration() (err error) {
+	var defaultConfigurations []data.Document
+	if defaultConfigurations, err = builtin.BuiltInDocuments(); len(defaultConfigurations) > 0 {
+		slog.Info("Client.BuiltInConfiguration()", "documents", defaultConfigurations, "error", err)
+		a.Config.AppendConfigurations(defaultConfigurations)
+	}
+	return
+}
+
+// Load config documents from default system config path.  Ignore if missing.
+func (a *App) SystemConfiguration(configPath string) (err error) {
+        var extractor data.Converter
+        var sourceResource data.Resource
+	if a.Config == nil {
+		a.Config = folio.DocumentRegistry.NewDocument("file:///etc/jx/runtimeconfig.jx.yaml")
+	}
+	if configPath != "" {
+		//configURI := folio.URI(configPath)
+		var loaded []data.Document
+		docFs := fs.NewWalkDir(os.DirFS(configPath), configPath, func(fsys fs.FS, path string, file fs.DirEntry) (loadErr error) {
+			u := folio.URI(fmt.Sprintf("file://%s", path))
+
+			if ! file.IsDir() {
+				slog.Info("Client.SystemConfiguration()", "uri", u)
+				if extractor, loadErr = folio.DocumentRegistry.ConverterTypes.New(string(u)); loadErr == nil {
+					if sourceResource, loadErr = u.NewResource(nil); loadErr == nil {
+						if loaded, loadErr = extractor.(data.ManyExtractor).ExtractMany(sourceResource, nil); loadErr == nil {
+							a.Config.AppendConfigurations(loaded)
+						}
+					}
+				}
+			}
+			return
+		})
+		err = docFs.Walk(nil)
+	}
+	return
+}
+
+func (a *App) MergeDocuments() {
+	a.merged = folio.DocumentRegistry.NewDocument("file://-")
+	for _, d := range a.Documents {
+		for _, declaration := range d.(*folio.Document).ResourceDeclarations {
+			a.merged.AddDeclaration((data.Declaration)(declaration))
+		}
+	}
+}
+
+func (a *App) SetOutput(uri string) (err error) {
+        if uri == "-" {
+                uri = "jx://-"
+        }
+	a.Target = folio.URI(uri)
+	if a.emitter, err = folio.DocumentRegistry.ConverterTypes.New(uri); err != nil {
+		return fmt.Errorf("Failed opening target: %s, %w", uri, err)
+	}
+	slog.Info("Client.SetOutput()", "uri", uri, "emitter", a.emitter)
+	return
+}
+
+// Each document has an `imports` keyword which can be used to load dependencies
+func (a *App) LoadDocumentImports() error {
+	for i, d := range a.Documents {
+		importedDocs := d.ImportedDocuments()
+		for _, importedDocument := range importedDocs {
+			docURI := folio.URI(importedDocument.GetURI())
+			if _, ok := a.ImportedMap[docURI]; !ok {
+				a.ImportedMap[docURI] = importedDocument
+				a.Documents = append(a.Documents, nil)
+				copy(a.Documents[i+1:], a.Documents[i:])
+				a.Documents[i] = importedDocument
+/*
+				if _, outputErr := a.emitter.Emit(importedDocument, nil); outputErr != nil {
+					return outputErr
+				}
+*/
+			}
+		}
+	}
+	return nil
+}
+
+
+func (a *App) ImportResource(ctx context.Context, uri string) (err error) {
+	if len(a.Documents) < 1 {
+		a.Documents = append(a.Documents, folio.DocumentRegistry.NewDocument(""))
+	}
+	resourceURI := folio.URI(uri)
+	u := resourceURI.Parse().URL()
+	if u == nil {
+		return fmt.Errorf("Failed adding resource: %s", uri)
+	}
+	if u.Scheme == "" {
+		u.Scheme = "file"
+	}
+
+	for _, d := range a.Documents {
+		if newResource, newResourceErr := d.NewResource(uri); newResourceErr == nil {
+			if _, err = newResource.Read(ctx); err != nil {
+				return
+			}
+		} else {
+			return newResourceErr
+		}
+	}
+	return
+}
+
+func (a *App) ImportSource(uri string) (loadedDocuments []data.Document, err error) {
+	if source := folio.URI(uri).Parse().URL(); source != nil {
+		if source.Scheme == "" {
+			source.Scheme = "file"
+		}
+
+		slog.Info("Client.ImportSource()", "uri", uri, "source", source, "error", err)
+		if loadedDocuments, err = folio.DocumentRegistry.LoadFromParsedURI(source); err == nil && loadedDocuments != nil {
+			a.Documents = append(a.Documents, loadedDocuments...)
+		}
+	} else {
+		err = folio.ErrInvalidURI
+	}
+
+	slog.Info("Client.ImportSource()", "uri", uri, "error", err)
+	return
+}
+
+func (a *App) Import(docs []string) (err error) {
+	for _, source := range docs {
+		if _, err = a.ImportSource(source); err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (a *App) Apply(ctx context.Context, deleteResources bool) (err error) {
+	var errorsCount int = 0
+	for _, d := range a.Documents {
+		d.SetConfig(a.Config)
+
+		var overrideState string = ""
+		if deleteResources {
+			overrideState = "delete"
+		}
+		d.ResolveIds(ctx)
+
+		_ = d.Apply("stat")
+
+		if ! d.CheckConstraints() {
+			slog.Info("Client.Apply() document constraints failed", "requires", d)
+			d.AddError(fmt.Errorf("%w: %s", folio.ErrConstraintFailure, d.GetURI()))
+			errorsCount++
+			continue
+		}
+
+		slog.Info("Client.Apply()", "uri", d.GetURI(), "document", d, "state", overrideState, "error", err)
+		if e := d.(*folio.Document).Apply(overrideState); e != nil {
+			slog.Info("Client.Apply() error", "error", e)
+			return e
+		}
+		if d.Failures() > 0 {
+			d.AddError(fmt.Errorf("%w: %d, %w", ErrFailedResources, d.Failures(), err))
+			errorsCount++
+		}
+	}
+
+	if errorsCount > 0 {
+		return fmt.Errorf("%w: %d", ErrFailedDocuments, errorsCount)
+	}
+	return
+}
+
+func (a *App) ImportCmd(ctx context.Context, docs []string, resourceURI string, quiet bool, merge bool) (err error) {
+	defer a.Close()
+	if err = a.Import(docs); err != nil {
+		return
+	}
+
+	if err = a.LoadDocumentImports(); err != nil {
+		return
+	}
+
+	if len(resourceURI) > 0 {
+		if err = a.ImportResource(ctx, resourceURI); err != nil {
+			return
+		}
+	}
+
+	if quiet {
+		err = a.Quiet()
+	} else {
+		if merge {
+			a.MergeDocuments()
+		}
+		err = a.Emit()
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (a *App) ApplyCmd(ctx context.Context, docs []string, quiet bool, deleteResources bool) (err error) {
+	defer a.Close()
+	var failedResources error
+	if err = a.Import(docs); err != nil {
+		return
+	}
+
+	if err = a.LoadDocumentImports(); err != nil {
+		return
+	}
+
+	if failedResources = a.Apply(ctx, deleteResources); failedResources != nil {
+		slog.Info("Client.ApplyCmd()", "client", a, "error", failedResources)
+		if ! errors.Is(failedResources, ErrFailedResources) && ! errors.Is(failedResources, ErrFailedDocuments) {
+			return failedResources
+		}
+	}
+
+	if quiet {
+		err = a.Quiet()
+	} else {
+		err = a.Emit()
+	}
+
+	if failedResources != nil {
+		if err != nil {
+			return fmt.Errorf("%w %w", failedResources, err)
+		} else {
+			return failedResources
+		}
+	}
+
+	return
+}
+
+func (a *App) Diff(left []data.Document, right []data.Document) (err error) {
+	output := os.Stdout
+	slog.Info("jx diff ", "right", right, "left", left)
+        index := 0
+        for {
+                if index >= len(right) && index >= len(left) {
+                        break
+                }
+                if index >= len(right) {
+                        if _, err = left[index].Diff(folio.DocumentRegistry.NewDocument(""), output); err != nil {
+                                return
+                        }
+                        index++
+                        continue
+                }
+                if index >= len(left) {
+                        if _, err = folio.DocumentRegistry.NewDocument("").Diff(right[index], output); err != nil {
+                                return
+                        }
+                        index++
+                        continue
+                }
+                if _, err = left[index].Diff(right[index], output); err != nil {
+                        return
+                }
+                index++
+        }
+	return
+}
+
+func (a *App) DiffCmd(docs []string) (err error) {
+	output := os.Stdout
+
+	var leftDocuments, rightDocuments []data.Document
+	var rightSource folio.URI
+
+	//leftSource := folio.URI(docs[0])
+	if len(docs) > 1 {
+		rightSource = folio.URI(docs[1])
+	}
+
+	if leftDocuments, err = a.ImportSource(docs[0]); err == nil {
+		if rightSource.IsEmpty() {
+			for _, doc := range leftDocuments {
+				_, err = doc.DiffState(output)
+			}
+		} else {
+			if rightDocuments, err = a.ImportSource(docs[1]); err == nil {
+				err = a.Diff(leftDocuments, rightDocuments)
+			}
+		}
+	}
+        return err
+}
+
+func (a *App) ConfigCmd(docs []string, includeSystemConfig bool) (err error) {
+	defer a.Close()
+	if err = a.BuiltInConfiguration(); err != nil {
+		slog.Warn("BuiltInConfiguration()", "error", err)
+	}
+
+	if err = a.Import(docs); err != nil {
+		return
+	}
+
+	if err = a.LoadDocumentImports(); err != nil {
+		return
+	}
+
+	if includeSystemConfig {
+		if _, err = a.emitter.Emit(a.Config, nil); err != nil {
+			return
+		}
+	}
+	_, err = a.emitter.(data.ManyEmitter).EmitMany(a.Documents, nil)
+	return
+}
+
+func (a *App) Quiet() (err error) {
+	output := os.Stdout
+	for _, d := range a.Documents {
+		for _, dr := range d.Declarations() {
+			if _, err = output.Write([]byte(fmt.Sprintf("%s\n", dr.Resource().URI()))); err != nil {
+				return
+			}
+		}
+	}
+	return
+}
+
+func (a *App) Emit() (err error) {
+	if a.merged == nil {
+		for _, d := range a.Documents {
+			slog.Info("Client.Emit() document", "document", d) 
+			if _, err = a.emitter.Emit(d, nil); err != nil {
+				return
+			}
+		}
+	} else {
+		if _, err = a.emitter.Emit(a.merged, nil); err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (a *App) Close() (err error) {
+	if a.emitter != nil {
+		slog.Info("Client.Close() emitter", "emitter", a.emitter)
+		return a.emitter.Close()
+	}
+	return
+}

internal/client/client_test.go

@@ -0,0 +1,323 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package client
+
+import (
+	"github.com/stretchr/testify/assert"
+	"os"
+	"os/user"
+	"os/exec"
+	"testing"
+	"decl/internal/tempdir"
+	"log"
+	"decl/internal/folio"
+_	"decl/internal/fan"
+	"decl/internal/codec"
+	"decl/internal/data"
+	"decl/internal/ext"
+	"context"
+	"fmt"
+	"log/slog"
+	"archive/tar"
+	"compress/gzip"
+	"bytes"
+	"io"
+)
+
+var programLevel = new(slog.LevelVar)
+
+var TempDir tempdir.Path = "jx_client"
+
+var ProcessTestUserName string
+var ProcessTestGroupName string
+
+func TestMain(m *testing.M) {
+	LoggerConfig()
+	err := TempDir.Create()
+	if err != nil || TempDir == "" {
+		log.Fatal(err)
+	}
+
+	ProcessTestUserName, ProcessTestGroupName = ProcessUserName()
+	rc := m.Run()
+
+	TempDir.Remove()
+	os.Exit(rc)
+}
+
+func LoggerConfig() {
+	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: programLevel}))
+	slog.SetDefault(logger)
+	programLevel.Set(slog.LevelDebug)
+}
+
+func ProcessUserName() (string, string) {
+	processUser, userErr := user.Current()
+	if userErr != nil {
+		panic(userErr)
+	}
+	processGroup, groupErr := user.LookupGroupId(processUser.Gid)
+	if groupErr != nil {
+		panic(groupErr)
+	}
+	return processUser.Username, processGroup.Name
+}
+
+func ExitError(e error) string {
+	if e != nil {
+		switch v := e.(type) {
+		case *exec.ExitError:
+			return string(v.Stderr)
+		default:
+			return e.Error()
+		}
+	}
+	return ""
+}
+
+// jx import <docuri>...
+func TestClientImport(t *testing.T) {
+	c := NewClient()
+	assert.NotNil(t, c)
+
+	importDocuments := []string{
+		"file://../../examples/file.jx.yaml",
+		"file://../../examples/user.jx.yaml",
+	}
+
+	assert.Nil(t, c.Import(importDocuments))
+
+	for index, uri := range importDocuments {
+		u := folio.URI(uri)
+		r, readerErr := u.ContentReaderStream()
+		assert.Nil(t, readerErr)
+		assert.NotNil(t, r)
+
+		doc := folio.DocumentRegistry.NewDocument(folio.URI(uri))
+		assert.Nil(t, doc.LoadReader(r, codec.FormatYaml))
+
+		imported := c.Documents[index]
+		assert.NotNil(t, imported)
+		assert.Equal(t, uri, imported.GetURI())
+		assert.Equal(t, doc.Len(), imported.Len())
+	}
+}
+
+// jx import --resource <resource>
+func TestClientImportResource(t *testing.T) {
+	ctx := context.Background()
+	c := NewClient()
+	assert.NotNil(t, c)
+
+	importResources := []string{
+		"file://../../COPYRIGHT",
+	}
+
+	for _, uri := range importResources {
+		assert.Nil(t, c.ImportResource(ctx, uri))
+	}
+
+	imported := c.Documents[0]
+	assert.NotNil(t, imported)
+	for _, uri := range importResources {
+		assert.NotNil(t, imported.(*folio.Document).GetResource(uri))
+	}
+}
+
+func TestClientEmit(t *testing.T) {
+	//ctx := context.Background()
+	c := NewClient()
+	assert.NotNil(t, c)
+
+	importDocuments := []string{
+		"file://../../examples/file.jx.yaml",
+		"file://../../examples/user.jx.yaml",
+	}
+
+	assert.Nil(t, c.Import(importDocuments))
+	targetFile := TempDir.FilePath("jx_emit_output.jx.yaml")
+	targetFileURI := fmt.Sprintf("file://%s", targetFile)
+	assert.Nil(t, c.SetOutput(targetFile))
+	assert.Nil(t, c.Emit())
+
+	assert.FileExists(t, targetFile)
+
+
+	u := folio.URI(targetFileURI)
+	r, readerErr := u.ContentReaderStream()
+	assert.Nil(t, readerErr)
+	assert.NotNil(t, r)
+
+	extractor, err := folio.DocumentRegistry.ConverterTypes.New(targetFileURI)
+	assert.Nil(t, err)
+	assert.NotNil(t, extractor)
+
+	targetResource, resErr := u.NewResource(nil)
+	assert.Nil(t, resErr)
+	docs, exErr := extractor.(data.ManyExtractor).ExtractMany(targetResource, nil)
+	assert.Nil(t, exErr)
+
+	assert.Equal(t, 2, len(docs))
+
+	assert.Equal(t, 1, docs[1].Len())
+}
+
+func BenchmarkClientSystemConfigurations(b *testing.B) {
+	assert.Nil(b, TempDir.Mkdir("benchconfig", 0700))
+	ConfDir := tempdir.Path(TempDir.FilePath("benchconfig"))
+	assert.Nil(b, ConfDir.CreateFile("cfg.jx.yaml", `
+configurations:
+- name: files
+  values:
+    prefix: /usr
+`))
+	
+	configDirURI := fmt.Sprintf("file://%s", ConfDir)
+	
+	programLevel.Set(slog.LevelError)
+	b.Run("systemconfiguration", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			c := NewClient()
+			_ = c.SystemConfiguration(configDirURI)
+		}
+	})
+	programLevel.Set(slog.LevelDebug)
+}
+
+func TestClientSystemConfiguration(t *testing.T) {
+	c := NewClient()
+	assert.NotNil(t, c)
+
+	assert.Nil(t, TempDir.Mkdir("config", 0700))
+
+	ConfDir := tempdir.Path(TempDir.FilePath("config"))
+	assert.Nil(t, ConfDir.CreateFile("cfg.jx.yaml", `
+configurations:
+- name: files
+  values:
+    prefix: /usr
+`))
+	
+	//configDirURI := fmt.Sprintf("file://%s", ConfDir)
+	configErr := c.SystemConfiguration(string(ConfDir))
+	assert.Nil(t, configErr)
+
+	assert.NotNil(t, c.Config)
+
+	slog.Info("TestClientSystemConfiguration", "config", c.Config)
+	cfg := c.Config.GetConfig("files")
+	assert.NotNil(t, cfg)
+
+	value, valueErr := cfg.GetValue("prefix")
+	assert.Nil(t, valueErr)
+	assert.Equal(t, "/usr", value.(string))
+}
+
+func TestClientApply(t *testing.T) {
+	ctx := context.Background()
+	c := NewClient()
+	assert.NotNil(t, c)
+
+	assert.Nil(t, TempDir.Mkdir("apply", 0700))
+	ApplyDir := tempdir.Path(TempDir.FilePath("apply"))
+
+	DocSource := ApplyDir.FilePath("res.jx.yaml")
+	TestFile := ApplyDir.FilePath("testfile.txt")
+	assert.Nil(t, ApplyDir.CreateFile("res.jx.yaml", fmt.Sprintf(`
+resources:
+- type: file
+  transition: create
+  attributes:
+    path: %s
+    content: |
+      a test string
+    owner: %s
+    group: %s
+    mode: 0644
+`, TestFile, ProcessTestUserName, ProcessTestGroupName)))
+
+
+	assert.Nil(t, c.Import([]string{DocSource}))
+	assert.Nil(t, c.LoadDocumentImports())
+
+	assert.Nil(t, c.Apply(ctx, false))
+
+	assert.FileExists(t, TestFile)
+
+	assert.Nil(t, c.Apply(ctx, true))
+
+	assert.NoFileExists(t, TestFile)
+}
+
+
+
+var tarArchiveBuffer bytes.Buffer
+
+func TarArchive(compress bool) (err error) {
+	var fileWriter io.WriteCloser
+
+	if compress {
+		gz := gzip.NewWriter(&tarArchiveBuffer)
+		defer gz.Close()
+		fileWriter = gz
+	} else {
+		fileWriter = ext.WriteNopCloser(&tarArchiveBuffer)
+	}
+
+	tw := tar.NewWriter(fileWriter)
+
+	fileContent := "test file content"
+
+	if err = tw.WriteHeader(&tar.Header{
+		Name: "testfile",
+		Mode: 0600,
+		Size: int64(len(fileContent)),
+	}); err == nil {
+		_, err = tw.Write([]byte(fileContent))
+	}
+	tw.Close()
+	return
+}
+
+func TestClientConverters(t *testing.T) {
+	for _, v := range []struct { Expected data.TypeName; URI string } {
+		{ Expected: data.TypeName("dir"), URI: "file:///tmp" },
+		{ Expected: data.TypeName("http"), URI: "https://localhost/test" },
+		{ Expected: data.TypeName("iptable"), URI: "iptable://filter/INPUT" },
+		{ Expected: data.TypeName("jx"), URI: "file:///tmp/test.jx.yaml" },
+		{ Expected: data.TypeName("package"), URI: "package://" },
+		{ Expected: data.TypeName("container"), URI: "container://" },
+		{ Expected: data.TypeName("user"), URI: "user://" },
+		{ Expected: data.TypeName("group"), URI: "group://" },
+		{ Expected: data.TypeName("tar"), URI: "tar://" },
+		{ Expected: data.TypeName("tar"), URI: "file:///tmp/foo.tar" },
+		{ Expected: data.TypeName("tar"), URI: "file:///tmp/foo.tar.gz" },
+		{ Expected: data.TypeName("tar"), URI: "file:///tmp/foo.tgz" },
+	} {
+		c, e := folio.DocumentRegistry.ConverterTypes.New(v.URI)
+		assert.Nil(t, e)
+		assert.NotNil(t, c)
+		assert.Equal(t, v.Expected, c.Type())
+	}
+}
+
+func TestClientImportTar(t *testing.T) {
+	c := NewClient()
+	assert.NotNil(t, c)
+
+	e := TarArchive(true)
+	assert.Nil(t, e)
+	assert.Greater(t, tarArchiveBuffer.Len(), 0)
+
+	path, err := TempDir.CreateFileFromReader("test.tar.gz", &tarArchiveBuffer)
+	assert.Nil(t, err)
+	uri := fmt.Sprintf("file://%s", path)
+
+	d := folio.NewDeclaration()
+	assert.Nil(t, d.NewResource(&uri))
+
+	docs, importErr := c.ImportSource(uri)
+
+	assert.Nil(t, importErr)
+	assert.Greater(t, len(docs), 0)
+}

internal/codec/decoder.go

@@ -8,8 +8,9 @@ _	"fmt"
 _	"github.com/xeipuuv/gojsonschema"
 	"gopkg.in/yaml.v3"
 	"io"
-_	"log"
+	"log/slog"
 	"strings"
+	"google.golang.org/protobuf/proto"
 )
 
 //type JSONDecoder json.Decoder
@@ -18,10 +19,22 @@ type Decoder interface {
 	Decode(v any) error
 }
 
-func NewDecoder() *Decoder {
+func NewDecoder(r io.Reader, format Format) Decoder {
+	switch format {
+	case FormatYaml:
+		return NewYAMLDecoder(r)
+	case FormatJson:
+		return NewJSONDecoder(r)
+	case FormatProtoBuf:
+		return NewProtoBufDecoder(r)
+	}
 	return nil
 }
 
+func NewStringDecoder(s string, format Format) Decoder {
+	return NewDecoder(strings.NewReader(s), format)
+}
+
 func NewJSONDecoder(r io.Reader) Decoder {
 	return json.NewDecoder(r)
 }
@@ -31,6 +44,7 @@ func NewJSONStringDecoder(s string) Decoder {
 }
 
 func NewYAMLDecoder(r io.Reader) Decoder {
+	slog.Info("NewYAMLDecoder()", "reader", r)
 	return yaml.NewDecoder(r)
 }
 
@@ -38,6 +52,19 @@ func NewYAMLStringDecoder(s string) Decoder {
 	return yaml.NewDecoder(strings.NewReader(s))
 }
 
-func NewProtoBufDecoder(r io.Reader) Decoder {
+type ProtoDecoder struct {
-	return nil
+	reader io.Reader
+}
+
+func (p *ProtoDecoder) Decode(v any) (err error) {
+	var protoData []byte
+	protoData, err = io.ReadAll(p.reader)
+	if err == nil {
+		err = proto.Unmarshal(protoData, v.(proto.Message))
+	}
+	return 
+}
+
+func NewProtoBufDecoder(r io.Reader) Decoder {
+	return &ProtoDecoder{ reader: r }
 }

internal/codec/decoder_test.go

@@ -9,14 +9,17 @@ _	"log"
 	"strings"
 	"testing"
 	"github.com/xeipuuv/gojsonschema"
+	"io"
+	"bytes"
+	"google.golang.org/protobuf/proto"
 )
 
 type TestUser struct {
-	Name string `json:"name" yaml:"name"`
+	Name string `json:"name" yaml:"name" protobuf:"bytes,1,opt,name=name"`
-	Uid string `json:"uid" yaml:"uid"`
+	Uid string `json:"uid" yaml:"uid" protobuf:"bytes,2,opt,name=uid"`
-	Group string `json:"group" yaml:"group"`
+	Group string `json:"group" yaml:"group" protobuf:"bytes,3,opt,name=group"`
-	Home string `json:"home" yaml:"home"`
+	Home string `json:"home" yaml:"home" protobuf:"bytes,4,opt,name=home"`
-	State string `json:"state" yaml:"state"`
+	State string `json:"state" yaml:"state" protobuf:"bytes,5,opt,name=state"`
 }
 
 func TestNewYAMLDecoder(t *testing.T) {
@@ -78,3 +81,54 @@ func TestNewJSONStringDecoder(t *testing.T) {
 	docErr := e.Decode(&TestUser{})
 	assert.Nil(t, docErr)
 }
+
+func TestNewDecoder(t *testing.T) {
+	pbData, err := proto.Marshal(&TestPBUser{ Name: "pb", Uid: "15001", Group: "15005", Home: "/home/pb", State: "present" })
+	assert.Nil(t, err)
+	for _, v := range []struct{ reader io.Reader; format Format; expectedhome string } {
+		{ reader: strings.NewReader(`{
+  "name": "testuser",
+  "uid": "12001",
+  "group": "12001",
+  "home": "/home/testuser",
+  "state": "present" }`), format: FormatJson, expectedhome: "/home/testuser" },
+		{ reader: strings.NewReader(`
+  name: "testuser"
+  uid: "12001"
+  group: "12001"
+  home: "/home/test"
+  state: "present"
+`), format: FormatYaml, expectedhome: "/home/test" },
+		{ reader: bytes.NewReader(pbData), format: FormatProtoBuf, expectedhome: "/home/pb" },
+	} {
+
+		decoder := NewDecoder(v.reader,  v.format)
+		assert.NotNil(t, decoder)
+		u := &TestPBUser{}
+		assert.Nil(t, decoder.Decode(u))
+		assert.Equal(t, v.expectedhome, u.Home )
+	}
+}
+
+func TestNewDecoderError(t *testing.T) {
+	pbData, err := proto.Marshal(&TestPBUser{ Name: "pb", Uid: "15001", Group: "15005", Home: "/home/pb", State: "present" })
+	assert.Nil(t, err)
+
+	decoder := NewDecoder(bytes.NewReader(pbData),  Format("foo"))
+	assert.Nil(t, decoder)
+}
+
+func TestNewStringDecoder(t *testing.T) {
+	jsonDoc := `{
+  "name": "testuser",
+  "uid": "12001",
+  "group": "12001",
+  "home": "/home/testuser",
+  "state": "present" }`
+	decoder := NewStringDecoder(jsonDoc, FormatJson)
+	assert.NotNil(t, decoder)
+	u := &TestUser{}
+	assert.Nil(t, decoder.Decode(u))
+	assert.Equal(t, "testuser", u.Name)
+	
+}

internal/codec/encoder.go

@@ -9,8 +9,12 @@ _	"github.com/xeipuuv/gojsonschema"
 	"gopkg.in/yaml.v3"
 	"io"
 _	"log"
+	"errors"
+	"google.golang.org/protobuf/proto"
 )
 
+var ErrInvalidWriter error = errors.New("Invalid writer")
+
 type JSONEncoder json.Encoder
 
 type Encoder interface {
@@ -18,7 +22,15 @@ type Encoder interface {
 	Close() error
 }
 
-func NewEncoder() *Encoder {
+func NewEncoder(w io.Writer, format Format) Encoder {
+	switch format {
+	case FormatYaml:
+		return NewYAMLEncoder(w)
+	case FormatJson:
+		return NewJSONEncoder(w)
+	case FormatProtoBuf:
+		return NewProtoBufEncoder(w)
+	}
 	return nil
 }
 
@@ -30,7 +42,29 @@ func NewYAMLEncoder(w io.Writer) Encoder {
 	return yaml.NewEncoder(w)
 }
 
+type ProtoEncoder struct {
+	writer io.Writer
+}
+
+func (p *ProtoEncoder) Encode(v any) (err error) {
+	var encoded []byte
+	encoded, err = proto.Marshal(v.(proto.Message))
+	if err != nil {
+		return
+	}
+
+	_, err = p.writer.Write(encoded)
+	return
+}
+
+func (p *ProtoEncoder) Close() error {
+	return nil
+}
+
 func NewProtoBufEncoder(w io.Writer) Encoder {
+	if w != nil {
+		return &ProtoEncoder{ writer: w }
+	}
 	return nil
 }
 

internal/codec/encoder_test.go

@@ -9,6 +9,9 @@ import (
 	"strings"
 	"testing"
 	"github.com/xeipuuv/gojsonschema"
+	"io"
+	"bytes"
+	"google.golang.org/protobuf/proto"
 )
 
 type TestFile struct {
@@ -56,3 +59,52 @@ schema:=`
 
 	assert.True(t, result.Valid())
 }
+
+func TestNewEncoder(t *testing.T) {
+
+	pb := &TestPBUser{ Name: "pb", Uid: "15001", Group: "15005", Home: "/home/pb", State: "present" }
+	jx := &TestUser{ Name: "jx", Uid: "17001", Group: "17005", Home: "/home/jx", State: "present" }
+
+	pbData, pbErr := proto.Marshal(pb)
+	assert.Nil(t, pbErr)
+
+	for _, v := range []struct{ writer io.Writer; testuser any; format Format; expected []byte} {
+		{ writer: &bytes.Buffer{}, testuser: jx, expected: []byte(`{"name":"jx","uid":"17001","group":"17005","home":"/home/jx","state":"present"}
+`), format: FormatJson },
+		{ writer: &bytes.Buffer{}, testuser: jx, expected: []byte(`name: jx
+uid: "17001"
+group: "17005"
+home: /home/jx
+state: present
+`), format: FormatYaml },
+		{ writer: &bytes.Buffer{}, testuser: pb, expected: pbData , format: FormatProtoBuf },
+	} {
+		encoder := NewEncoder(v.writer,  v.format)
+		assert.NotNil(t, encoder)
+		assert.Nil(t, encoder.Encode(v.testuser))
+		assert.Equal(t, string(v.expected), v.writer.(*bytes.Buffer).String())
+		assert.Equal(t, v.expected, v.writer.(*bytes.Buffer).Bytes())
+		assert.Nil(t, encoder.Close())
+	}
+}
+
+func TestNewEncoderError(t *testing.T) {
+	encoder := NewEncoder(&strings.Builder{}, Format("foo"))
+	assert.Nil(t, encoder)
+}
+
+func TestNewProtobufError(t *testing.T) {
+	encoder := NewProtoBufEncoder(nil)
+	assert.Nil(t, encoder)
+}
+
+/*
+func TestProtobufEncodeError(t *testing.T) {
+	buf := &bytes.Buffer{}
+	buf.Write([]byte("broken input"))
+
+	encoder := NewProtoBufEncoder(buf)
+	assert.NotNil(t, encoder)
+	assert.NotNil(t, encoder.Encode(&TestPBUser{}))
+}
+*/

internal/codec/testuser.pb.go

@@ -0,0 +1,179 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.34.2
+// 	protoc        v3.12.4
+// source: testuser.proto
+
+package codec
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type TestPBUser struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name  string `protobuf:"bytes,1,opt,name=Name,proto3" json:"Name,omitempty"`
+	Uid   string `protobuf:"bytes,2,opt,name=Uid,proto3" json:"Uid,omitempty"`
+	Group string `protobuf:"bytes,3,opt,name=Group,proto3" json:"Group,omitempty"`
+	Home  string `protobuf:"bytes,4,opt,name=Home,proto3" json:"Home,omitempty"`
+	State string `protobuf:"bytes,5,opt,name=State,proto3" json:"State,omitempty"`
+}
+
+func (x *TestPBUser) Reset() {
+	*x = TestPBUser{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_testuser_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TestPBUser) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TestPBUser) ProtoMessage() {}
+
+func (x *TestPBUser) ProtoReflect() protoreflect.Message {
+	mi := &file_testuser_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TestPBUser.ProtoReflect.Descriptor instead.
+func (*TestPBUser) Descriptor() ([]byte, []int) {
+	return file_testuser_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *TestPBUser) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *TestPBUser) GetUid() string {
+	if x != nil {
+		return x.Uid
+	}
+	return ""
+}
+
+func (x *TestPBUser) GetGroup() string {
+	if x != nil {
+		return x.Group
+	}
+	return ""
+}
+
+func (x *TestPBUser) GetHome() string {
+	if x != nil {
+		return x.Home
+	}
+	return ""
+}
+
+func (x *TestPBUser) GetState() string {
+	if x != nil {
+		return x.State
+	}
+	return ""
+}
+
+var File_testuser_proto protoreflect.FileDescriptor
+
+var file_testuser_proto_rawDesc = []byte{
+	0x0a, 0x0e, 0x74, 0x65, 0x73, 0x74, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x12, 0x05, 0x63, 0x6f, 0x64, 0x65, 0x63, 0x22, 0x72, 0x0a, 0x0a, 0x54, 0x65, 0x73, 0x74, 0x50,
+	0x42, 0x55, 0x73, 0x65, 0x72, 0x12, 0x12, 0x0a, 0x04, 0x4e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20,
+	0x01, 0x28, 0x09, 0x52, 0x04, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x10, 0x0a, 0x03, 0x55, 0x69, 0x64,
+	0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x55, 0x69, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x47,
+	0x72, 0x6f, 0x75, 0x70, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x47, 0x72, 0x6f, 0x75,
+	0x70, 0x12, 0x12, 0x0a, 0x04, 0x48, 0x6f, 0x6d, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52,
+	0x04, 0x48, 0x6f, 0x6d, 0x65, 0x12, 0x14, 0x0a, 0x05, 0x53, 0x74, 0x61, 0x74, 0x65, 0x18, 0x05,
+	0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x53, 0x74, 0x61, 0x74, 0x65, 0x42, 0x15, 0x5a, 0x13, 0x64,
+	0x65, 0x63, 0x6c, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61, 0x6c, 0x2f, 0x63, 0x6f, 0x64,
+	0x65, 0x63, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_testuser_proto_rawDescOnce sync.Once
+	file_testuser_proto_rawDescData = file_testuser_proto_rawDesc
+)
+
+func file_testuser_proto_rawDescGZIP() []byte {
+	file_testuser_proto_rawDescOnce.Do(func() {
+		file_testuser_proto_rawDescData = protoimpl.X.CompressGZIP(file_testuser_proto_rawDescData)
+	})
+	return file_testuser_proto_rawDescData
+}
+
+var file_testuser_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_testuser_proto_goTypes = []any{
+	(*TestPBUser)(nil), // 0: codec.TestPBUser
+}
+var file_testuser_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_testuser_proto_init() }
+func file_testuser_proto_init() {
+	if File_testuser_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_testuser_proto_msgTypes[0].Exporter = func(v any, i int) any {
+			switch v := v.(*TestPBUser); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_testuser_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_testuser_proto_goTypes,
+		DependencyIndexes: file_testuser_proto_depIdxs,
+		MessageInfos:      file_testuser_proto_msgTypes,
+	}.Build()
+	File_testuser_proto = out.File
+	file_testuser_proto_rawDesc = nil
+	file_testuser_proto_goTypes = nil
+	file_testuser_proto_depIdxs = nil
+}

internal/codec/testuser.proto

@@ -0,0 +1,13 @@
+syntax = "proto3";
+package codec;
+option go_package = "decl/internal/codec";
+
+
+message TestPBUser {
+  string Name = 1;
+  string Uid = 2;
+  string Group = 3;
+	string Home = 4;
+	string State = 5;
+}
+

internal/codec/types.go

@@ -0,0 +1,87 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package codec
+
+import (
+	"io"
+	"fmt"
+	"errors"
+	"encoding/json"
+	"gopkg.in/yaml.v3"
+)
+
+const (
+	FormatYml Format = "yml"
+	FormatYaml Format = "yaml"
+	FormatJson Format = "json"
+	FormatProtoBuf Format = "protobuf"
+)
+
+var ErrInvalidFormat error = errors.New("invalid Format value")
+
+type Format string
+
+func (f *Format) Validate() error {
+	switch *f {
+	case FormatYml, FormatYaml, FormatJson, FormatProtoBuf:
+		return nil
+	default:
+		return fmt.Errorf("%w: %s", ErrInvalidFormat, *f)
+	}
+}
+
+func (f *Format) Set(value string) (err error) {
+	if err = (*Format)(&value).Validate(); err == nil {
+		err = f.UnmarshalValue(value)
+	}
+	return
+}
+
+func (f *Format) UnmarshalValue(value string) error {
+	switch value {
+	case string(FormatYml):
+		*f = FormatYaml
+	case string(FormatYaml), string(FormatJson), string(FormatProtoBuf):
+		*f = Format(value)
+	default:
+		return ErrInvalidFormat
+	}
+	return nil
+}
+
+func (f *Format) UnmarshalJSON(data []byte) error {
+	var s string
+	if unmarshalFormatTypeErr := json.Unmarshal(data, &s); unmarshalFormatTypeErr != nil {
+		return unmarshalFormatTypeErr
+	}
+	return f.UnmarshalValue(s)
+}
+
+func (f *Format) UnmarshalYAML(value *yaml.Node) error {
+	var s string
+	if err := value.Decode(&s); err != nil {
+		return err
+	}
+	return f.UnmarshalValue(s)
+}
+
+func (f Format) Encoder(w io.Writer) Encoder {
+	return NewEncoder(w, f)
+}
+
+func (f Format) Decoder(r io.Reader) Decoder {
+	return NewDecoder(r, f)
+}
+
+func (f Format) StringDecoder(s string) Decoder {
+	return NewStringDecoder(s, f)
+}
+
+func (f Format) Serialize(object any, w io.Writer) error {
+	return f.Encoder(w).Encode(object)
+}
+
+func (f Format) Deserialize(r io.Reader, object any) error {
+	return f.Decoder(r).Decode(object)
+}
+

internal/codec/types_test.go

@@ -0,0 +1,77 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package codec
+
+import (
+_	"fmt"
+	"github.com/stretchr/testify/assert"
+_	"log"
+	"testing"
+	"strings"
+	"encoding/json"
+)
+
+type TestDec struct {
+	FormatType Format `yaml:"formattype" json:"formattype"`
+}
+
+func TestFormatType(t *testing.T) {
+	yamlData := `
+formattype: json
+`
+	v := &TestDec{}
+
+	dec := NewYAMLStringDecoder(yamlData)
+	e := dec.Decode(v)
+
+	assert.Nil(t, e)
+
+	assert.Equal(t, FormatJson, v.FormatType)
+}
+
+func TestFormatTypeErr(t *testing.T) {
+	yamlData := `
+formattype: foo
+`
+
+	v := &TestDec{}
+
+	dec := NewYAMLStringDecoder(yamlData)
+	e := dec.Decode(v)
+
+	assert.ErrorIs(t, ErrInvalidFormat, e)
+}
+
+func TestFormatValidate(t *testing.T) {
+	f := FormatYaml
+	assert.Nil(t, f.Validate())
+
+	var fail Format = Format("foo")
+	assert.ErrorIs(t, fail.Validate(), ErrInvalidFormat)
+
+	var testFormatSet Format
+	assert.Nil(t, testFormatSet.Set("yaml"))
+
+	assert.ErrorIs(t, testFormatSet.Set("yamlv3"), ErrInvalidFormat)
+}
+
+func TestFormatCodec(t *testing.T) {
+	var output map[string]Format = make(map[string]Format)
+	var writer strings.Builder
+	encoder := FormatYaml.Encoder(&writer)
+	assert.NotNil(t, encoder)
+
+	decoder := FormatYaml.Decoder(strings.NewReader("formattype: json"))
+	assert.Nil(t, decoder.Decode(output))
+	assert.Equal(t, FormatJson, output["formattype"])
+}
+
+func TestFormatUnmarshal(t *testing.T) {
+	var f Format 
+	assert.Nil(t, json.Unmarshal([]byte("\"yaml\""), &f))
+	assert.Equal(t, FormatYaml, f)
+	assert.NotNil(t, json.Unmarshal([]byte("\"yaml"), &f))
+
+	assert.Nil(t, json.Unmarshal([]byte("\"yml\""), &f))
+	assert.Equal(t, FormatYaml, f)
+}

internal/command/command.go

@@ -0,0 +1,223 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package command
+
+import (
+	_ "context"
+	"encoding/json"
+	"fmt"
+	"errors"
+	"gopkg.in/yaml.v3"
+	"io"
+	"log/slog"
+	_ "net/url"
+	"os"
+	"os/exec"
+	"strings"
+	"text/template"
+	"decl/internal/codec"
+	"syscall"
+)
+
+var ErrUnknownCommand error = errors.New("Unable to find command in path")
+
+type CommandExecutor func(value any) ([]byte, error)
+type CommandExtractAttributes func(output []byte, target any) error
+type CommandExists func() error
+
+type CommandArg string
+
+type CommandInput string
+
+type Command struct {
+	Path		string			`json:"path" yaml:"path"`
+	Args		[]CommandArg		`json:"args" yaml:"args"`
+	Env		[]string		`json:"env" yaml:"env"`
+	Split		bool			`json:"split" yaml:"split"`
+	FailOnError	bool			`json:"failonerror" yaml:"failonerror"`
+	StdinAvailable	bool			`json:"stdinavailable,omitempty" yaml:"stdinavailable,omitempty"`
+	ExitCode	int			`json:"exitcode,omitempty" yaml:"exitcode,omitempty"`
+	Stdout		string			`json:"stdout,omitempty" yaml:"stdout,omitempty"`
+	Stderr		string			`json:"stderr,omitempty" yaml:"stderr,omitempty"`
+	Executor	CommandExecutor		`json:"-" yaml:"-"`
+	Extractor CommandExtractAttributes	`json:"-" yaml:"-"`
+	CommandExists CommandExists		`json:"-" yaml:"-"`
+	Input	CommandInput			`json:"-" yaml:"-"`
+	stdin	io.Reader			`json:"-" yaml:"-"`
+}
+
+func NewCommand() *Command {
+	c := &Command{ Split: true, FailOnError: true }
+	c.Defaults()
+	return c
+}
+
+func (c *Command) ClearOutput() {
+	c.Stdout = ""
+	c.Stderr = ""
+	c.ExitCode = 0
+}
+
+func (c *Command) Defaults() {
+	c.ClearOutput()
+	c.Split = true
+	c.FailOnError = true
+	c.CommandExists = func() error {
+		if _, err := exec.LookPath(c.Path); err != nil {
+			return fmt.Errorf("%w - %w", ErrUnknownCommand, err)
+		}
+		return nil
+	}
+	c.Executor = func(value any) ([]byte, error) {
+		c.ClearOutput()
+		args, err := c.Template(value)
+		if err != nil {
+			return nil, err
+		}
+		if inputErr := c.SetInput(value); inputErr != nil {
+			return nil, inputErr
+		}
+		cmd := exec.Command(c.Path, args...)
+		c.SetCmdEnv(cmd)
+	
+		if c.stdin != nil {
+			cmd.Stdin = c.stdin
+		}
+
+		slog.Info("execute() - cmd", "path", c.Path, "args", args)
+		output, stdoutPipeErr := cmd.StdoutPipe()
+		if stdoutPipeErr != nil {
+			return nil, stdoutPipeErr
+		}
+
+		stderr, pipeErr := cmd.StderrPipe()
+		if pipeErr != nil {
+			return nil, pipeErr
+		}
+
+		if startErr := cmd.Start(); startErr != nil {
+			return nil, startErr
+		}
+
+		slog.Info("execute() - start", "cmd", cmd)
+		stdOutOutput, _ := io.ReadAll(output)
+		stdErrOutput, _ := io.ReadAll(stderr)
+		if len(stdOutOutput) > 100 {
+			slog.Info("execute() - io", "stdout", string(stdOutOutput[:100]), "stderr", string(stdErrOutput))
+		} else {
+			slog.Info("execute() - io", "stdout", string(stdOutOutput), "stderr", string(stdErrOutput))
+		}
+		waitErr := cmd.Wait()
+
+		c.Stdout = string(stdOutOutput)
+		c.Stderr = string(stdErrOutput)
+		c.ExitCode = c.GetExitCodeFromError(waitErr)
+
+		if len(stdOutOutput) > 100 {
+			slog.Info("execute()", "path", c.Path, "args", args, "output", string(stdOutOutput[:100]), "error", string(stdErrOutput))
+		} else {
+			slog.Info("execute()", "path", c.Path, "args", args, "output", string(stdOutOutput), "error", string(stdErrOutput))
+		}
+
+		if len(stdErrOutput) > 0 && c.FailOnError {
+			return stdOutOutput, fmt.Errorf("%w %s", waitErr, string(stdErrOutput))
+		}
+		return stdOutOutput, waitErr
+	}
+}
+
+func (c *Command) Load(r io.Reader) error {
+	return codec.NewYAMLDecoder(r).Decode(c)
+}
+
+func (c *Command) LoadDecl(yamlResourceDeclaration string) error {
+	return codec.NewYAMLStringDecoder(yamlResourceDeclaration).Decode(c)
+}
+
+func (c *Command) SetCmdEnv(cmd *exec.Cmd) {
+	cmd.Env = append(os.Environ(), c.Env...)
+}
+
+func (c *Command) SetStdinReader(r io.Reader) {
+	if c.StdinAvailable {
+		c.stdin = r
+	}
+}
+
+func (c *Command) Exists() bool {
+	return c.CommandExists() == nil
+}
+
+func (c *Command) GetExitCodeFromError(err error) (ec int) {
+	if exitErr, ok := err.(*exec.ExitError); ok {
+		if status, ok := exitErr.Sys().(syscall.WaitStatus); ok {
+			return status.ExitStatus()
+		}
+	}
+	return
+}
+
+func (c *Command) Template(value any) ([]string, error) {
+	var args []string = make([]string, 0, len(c.Args) * 2)
+	for i, arg := range c.Args {
+		var commandLineArg strings.Builder
+		err := template.Must(template.New(fmt.Sprintf("arg%d", i)).Parse(string(arg))).Execute(&commandLineArg, value)
+		if err != nil {
+			return nil, err
+		}
+		if commandLineArg.Len() > 0 {
+			var splitArg []string
+			if c.Split {
+				splitArg = strings.Split(commandLineArg.String(), " ")
+			} else {
+				splitArg = []string{commandLineArg.String()}
+			}
+			slog.Info("Template()", "split", splitArg, "len", len(splitArg))
+			args = append(args, splitArg...)
+		}
+	}
+	
+	slog.Info("Template()", "Args", c.Args, "lencargs", len(c.Args), "args", args, "lenargs", len(args), "value", value)
+	return args, nil
+}
+
+func (c *Command) Execute(value any) ([]byte, error) {
+	return c.Executor(value)
+}
+
+func (c *Command) SetInput(value any) error {
+	if len(c.Input) > 0 {
+		if r, err := c.Input.Template(value); err != nil {
+			return err
+		} else {
+			c.SetStdinReader(strings.NewReader(r.String()))
+		}
+	}
+	return nil
+}
+
+func (c *CommandInput) Template(value any) (result strings.Builder, err error) {
+	err = template.Must(template.New("commandInput").Parse(string(*c))).Execute(&result, value)
+	return
+}
+
+func (c *CommandArg) UnmarshalValue(value string) error {
+	*c = CommandArg(value)
+	return nil
+}
+
+func (c *CommandArg) UnmarshalJSON(data []byte) error {
+	var s string
+	if unmarshalRouteTypeErr := json.Unmarshal(data, &s); unmarshalRouteTypeErr != nil {
+		return unmarshalRouteTypeErr
+	}
+	return c.UnmarshalValue(s)
+}
+
+func (c *CommandArg) UnmarshalYAML(value *yaml.Node) error {
+	var s string
+	if err := value.Decode(&s); err != nil {
+		return err
+	}
+	return c.UnmarshalValue(s)
+}

internal/command/command_test.go

@@ -0,0 +1,102 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+
+package command
+
+import (
+_	"fmt"
+	"github.com/stretchr/testify/assert"
+_	"os"
+_	"strings"
+	"testing"
+	"bytes"
+)
+
+func TestNewCommand(t *testing.T) {
+	c := NewCommand()
+	assert.NotNil(t, c)
+}
+
+func TestCommandLoad(t *testing.T) {
+	c := NewCommand()
+	assert.NotNil(t, c)
+
+	decl := `
+path: find
+args:
+- "{{ .Path }}"
+`
+
+	assert.Nil(t, c.LoadDecl(decl))
+	assert.Equal(t, "find", c.Path)
+}
+
+func TestCommandTemplate(t *testing.T) {
+	c := NewCommand()
+	assert.NotNil(t, c)
+
+	decl := `
+path: find
+args:
+- "{{ .Path }}"
+`
+
+	assert.Nil(t, c.LoadDecl(decl))
+	assert.Equal(t, "find", c.Path)
+	assert.Equal(t, 1, len(c.Args))
+
+	f := struct { Path string } {
+		Path: "./",
+	}
+
+	args, templateErr := c.Template(f)
+	assert.Nil(t, templateErr)
+	assert.Equal(t, 1, len(args))
+
+	assert.Equal(t, "./", string(args[0]))
+
+	out, err := c.Execute(f)
+	assert.Nil(t, err)
+	assert.Greater(t, len(out), 0)
+}
+
+func TestCommandStdin(t *testing.T) {
+	var expected string = "stdin test data"
+	var stdinBuffer bytes.Buffer
+	stdinBuffer.WriteString(expected)
+
+	c := NewCommand()
+	assert.NotNil(t, c)
+
+	decl := `
+path: cat
+stdinavailable: true
+`
+
+	assert.Nil(t, c.LoadDecl(decl))
+	assert.Equal(t, "cat", c.Path)
+	
+	c.SetStdinReader(&stdinBuffer)
+	out, err := c.Execute(nil)
+	assert.Nil(t, err)
+	assert.Equal(t, expected, string(out))
+}
+
+func TestCommandExitCode(t *testing.T) {
+	c := NewCommand()
+	assert.NotNil(t, c)
+	decl := `
+path: ls
+args:
+- "amissingfile"
+`
+
+	assert.Nil(t, c.LoadDecl(decl))
+	assert.Equal(t, "ls", c.Path)
+
+	out, err := c.Execute(nil)
+	assert.NotNil(t, err)
+	assert.Greater(t, c.ExitCode, 0)	
+	assert.Equal(t, string(out), c.Stdout)
+	assert.Equal(t, string("ls: amissingfile: No such file or directory\n"), c.Stderr)
+}

internal/config/certificate.go

@@ -0,0 +1,103 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"context"
+	"io"
+	"fmt"
+	"net/url"
+	"decl/internal/codec"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"encoding/json"
+	"gopkg.in/yaml.v3"
+	"crypto/x509"
+)
+
+func init() {
+	folio.DocumentRegistry.ConfigurationTypes.Register([]string{"certificate"}, func(u *url.URL) data.Configuration {
+		c := NewCertificate()
+		return c
+	})
+}
+
+type Certificate map[string]*x509.Certificate
+
+func NewCertificate() *Certificate {
+	c := make(Certificate)
+	return &c
+}
+
+func (c *Certificate) URI() string {
+	return fmt.Sprintf("%s://%s", c.Type(), "")
+}
+
+func (c *Certificate) SetURI(uri string) error {
+	return nil
+}
+
+func (c *Certificate) SetParsedURI(uri data.URIParser) error {
+	return nil
+}
+
+func (c *Certificate) Read(ctx context.Context) ([]byte, error) {
+	return nil, nil
+}
+
+func (c *Certificate) Load(r io.Reader) (err error) {
+	err = codec.NewYAMLDecoder(r).Decode(c)
+	if err == nil {
+		_, err = c.Read(context.Background())
+	}
+	return err
+}
+
+func (c *Certificate) LoadYAML(yamlData string) (err error) {
+	err = codec.NewYAMLStringDecoder(yamlData).Decode(c)
+	if err == nil {
+		_, err = c.Read(context.Background())
+	}
+	return err
+}
+
+func (c *Certificate) UnmarshalJSON(data []byte) error {
+	if unmarshalErr := json.Unmarshal(data, c); unmarshalErr != nil {
+		return unmarshalErr
+	}
+	return nil
+}
+
+func (c *Certificate) UnmarshalYAML(value *yaml.Node) error {
+	type decodeCertificate Certificate
+	if unmarshalErr := value.Decode((*decodeCertificate)(c)); unmarshalErr != nil {
+		return unmarshalErr
+	}
+	return nil
+}
+
+func (c *Certificate) Clone() data.Configuration {
+	jsonGeneric, _ := json.Marshal(c)
+	clone := NewCertificate()
+	if unmarshalErr := json.Unmarshal(jsonGeneric, &clone); unmarshalErr != nil {
+		panic(unmarshalErr)
+	}
+	return clone
+}
+
+func (c *Certificate) Type() string {
+	return "certificate"
+}
+
+func (c *Certificate) GetValue(name string) (result any, err error) {
+	var ok bool
+	if result, ok = (*c)[name]; !ok {
+		err = data.ErrUnknownConfigurationKey
+	}
+	return
+}
+
+func (c *Certificate) Has(key string) (ok bool) {
+	_, ok = (*c)[key]
+	return
+}

internal/config/certificate_test.go

@@ -0,0 +1,33 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"crypto/x509"
+)
+
+func TestNewCertificateConfig(t *testing.T) {
+	c := NewCertificate()
+	assert.NotNil(t, c)
+}
+
+func TestNewCertificateConfigYAML(t *testing.T) {
+	c := NewCertificate()
+	assert.NotNil(t, c)
+
+	config := `
+catemplate:
+  subject:
+    organization:
+    - RKH
+  notbefore: 2024-07-10
+`
+
+  yamlErr := c.LoadYAML(config)
+	assert.Nil(t, yamlErr)
+	crt, err := c.GetValue("catemplate")
+	assert.Nil(t, err)
+	assert.Equal(t, []string{"RKH"}, crt.(*x509.Certificate).Subject.Organization)
+}

internal/config/configs/facter.yaml

@@ -0,0 +1,9 @@
+configurations:
+- name: facts
+  type: exec
+  values:
+    path: /usr/bin/facter
+    args:
+      - "-j"
+    format: "json"
+    

internal/config/exec.go

@@ -0,0 +1,140 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"context"
+	"io"
+	"fmt"
+	"net/url"
+	"decl/internal/codec"
+	"decl/internal/command"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"encoding/json"
+	"gopkg.in/yaml.v3"
+)
+
+func init() {
+	folio.DocumentRegistry.ConfigurationTypes.Register([]string{"exec"}, func(u *url.URL) data.Configuration {
+		x := NewExec()
+		return x
+	})
+}
+
+type Exec struct {
+	Path string `yaml:"path" json:"path"`
+	Args []command.CommandArg `yaml:"args" json:"args"`
+	ValuesFormat codec.Format `yaml:"format" json:"format"`
+	Values map[string]any `yaml:"values" json:"values"`
+	ReadCommand *command.Command `yaml:"-" json:"-"`
+}
+
+func NewExec() *Exec {
+	x := &Exec{}
+	return x
+}
+
+func (x *Exec) SetURI(uri string) error {
+	return nil
+}
+
+func (x *Exec) SetParsedURI(uri data.URIParser) error {
+	return nil
+}
+
+func (x *Exec) URI() string {
+	return fmt.Sprintf("%s://%s", x.Type(), x.Path)
+}
+
+func (x *Exec) Read(ctx context.Context) ([]byte, error) {
+	out, err := x.ReadCommand.Execute(x)
+	if err != nil {
+		return nil, err
+	}
+	exErr := x.ReadCommand.Extractor(out, x)
+	if exErr != nil {
+		return nil, exErr
+	}
+	return nil, exErr
+}
+
+func (x *Exec) Load(r io.Reader) (err error) {
+	err = codec.NewYAMLDecoder(r).Decode(x)
+	if err == nil {
+		_, err = x.Read(context.Background())
+	}
+	return err
+}
+
+func (x *Exec) LoadYAML(yamlData string) (err error) {
+	err = codec.NewYAMLStringDecoder(yamlData).Decode(x)
+	if err == nil {
+		_, err = x.Read(context.Background())
+	}
+	return err
+}
+
+func (x *Exec) UnmarshalJSON(data []byte) error {
+	if unmarshalErr := json.Unmarshal(data, x); unmarshalErr != nil {
+		return unmarshalErr
+	}
+	x.NewReadConfigCommand()
+	return nil
+}
+
+func (x *Exec) UnmarshalYAML(value *yaml.Node) error {
+	type decodeExec Exec
+	if unmarshalErr := value.Decode((*decodeExec)(x)); unmarshalErr != nil {
+		return unmarshalErr
+	}
+	x.NewReadConfigCommand()
+	return nil
+}
+
+
+func (x *Exec) Clone() data.Configuration {
+	clone := NewExec()
+	clone.Path = x.Path
+	clone.Args = x.Args
+	clone.ValuesFormat = x.ValuesFormat
+	clone.Values = x.Values
+	clone.ReadCommand = x.ReadCommand
+	return clone
+}
+
+func (x *Exec) Type() string {
+	return "exec"
+}
+
+func (x *Exec) GetValue(name string) (result any, err error) {
+	var ok bool
+	if result, ok = x.Values[name]; !ok {
+		err = data.ErrUnknownConfigurationKey
+	}
+	return
+}
+
+func (x *Exec) Has(key string) (ok bool) {
+	_, ok = x.Values[key]
+	return
+}
+
+func (ex *Exec) NewReadConfigCommand() {
+	ex.ReadCommand = command.NewCommand()
+	ex.ReadCommand.Path = ex.Path
+	ex.ReadCommand.Args = ex.Args
+
+	ex.ReadCommand.Extractor = func(out []byte, target any) error {
+		x := target.(*Exec)
+		switch x.ValuesFormat {
+		case codec.FormatYaml:
+			return codec.NewYAMLStringDecoder(string(out)).Decode(&x.Values)
+		case codec.FormatJson:
+			return codec.NewJSONStringDecoder(string(out)).Decode(&x.Values)
+		case codec.FormatProtoBuf:
+		}
+		return nil
+	}
+}
+

internal/config/generic.go

@@ -0,0 +1,86 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"context"
+	"encoding/json"
+	"net/url"
+	"fmt"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"decl/internal/codec"
+	"io"
+)
+
+func init() {
+	folio.DocumentRegistry.ConfigurationTypes.Register([]string{"generic"}, func(u *url.URL) data.Configuration {
+		g := NewGeneric[any]()
+		return g
+	})
+}
+
+type Generic[Value any] map[string]Value
+
+func NewGeneric[Value any]() *Generic[Value] {
+	g := make(Generic[Value])
+	return &g
+}
+
+func (g *Generic[Value]) URI() string {
+	return fmt.Sprintf("%s://%s", g.Type(), "")
+}
+
+func (g *Generic[Value]) SetURI(uri string) error {
+	return nil
+}
+
+func (g *Generic[Value]) SetParsedURI(uri data.URIParser) error {
+	return nil
+}
+
+func (g *Generic[Value]) Load(r io.Reader) (err error) {
+	err = codec.NewYAMLDecoder(r).Decode(g)
+	if err == nil {
+		_, err = g.Read(context.Background())
+	}
+	return err
+}
+
+func (g *Generic[Value]) LoadYAML(yamlData string) (err error) {
+	err = codec.NewYAMLStringDecoder(yamlData).Decode(g)
+	if err == nil {
+		_, err = g.Read(context.Background())
+	}
+	return err
+}
+
+func (g *Generic[Value]) Clone() data.Configuration {
+	jsonGeneric, _ := json.Marshal(g)
+	clone := NewGeneric[Value]()
+	if unmarshalErr := json.Unmarshal(jsonGeneric, clone); unmarshalErr != nil {
+		panic(unmarshalErr)
+	}
+	return clone
+}
+
+func (g *Generic[Value]) Type() string {
+	return "generic"
+}
+
+func (g *Generic[Value]) Read(context.Context) ([]byte, error) {
+	return nil, nil
+}
+
+func (g *Generic[Value]) GetValue(name string) (result any, err error) {
+	var ok bool
+	if result, ok = (*g)[name]; !ok {
+		err = data.ErrUnknownConfigurationKey
+	}
+	return
+}
+
+func (g *Generic[Value]) Has(key string) (ok bool) {
+	_, ok = (*g)[key]
+	return
+}

internal/config/generic_test.go

@@ -1,14 +1,13 @@
 // Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
 
-package target
+package config
 
 import (
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
 
-func TestNewTarSource(t *testing.T) {
+func TestNewGenericConfig(t *testing.T) {
-	s := NewTar()
+	g := NewGeneric[any]()
-	assert.NotNil(t, s)
+	assert.NotNil(t, g)
 }
-

internal/config/schema.go

@@ -0,0 +1,63 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"errors"
+	"fmt"
+	"github.com/xeipuuv/gojsonschema"
+	"strings"
+	"embed"
+	"net/http"
+	"log/slog"
+	"decl/internal/folio"
+)
+
+//go:embed schemas/*.schema.json
+var schemaFiles embed.FS
+
+var schemaFilesUri folio.URI = "file://config/schemas/*.schema.json"
+
+func init() {
+	folio.DocumentRegistry.Schemas[schemaFilesUri] = schemaFiles
+	folio.DocumentRegistry.DefaultSchema = schemaFilesUri
+}
+
+type Schema struct {
+	schema gojsonschema.JSONLoader
+}
+
+func NewSchema(name string) *Schema {
+	path := fmt.Sprintf("file://schemas/%s.schema.json", name)
+
+	return &Schema{schema: gojsonschema.NewReferenceLoaderFileSystem(path, http.FS(schemaFiles))}
+}
+
+func (s *Schema) Validate(source string) error {
+	loader := gojsonschema.NewStringLoader(source)
+	result, err := gojsonschema.Validate(s.schema, loader)
+
+	if err != nil {
+		slog.Info("schema error", "source", source, "schema", s.schema, "result", result, "err",  err)
+		return err
+	}
+	slog.Info("schema", "source", source, "schema", s.schema, "result", result, "err",  err)
+
+	if !result.Valid() {
+		schemaErrors := strings.Builder{}
+		for _, err := range result.Errors() {
+			schemaErrors.WriteString(err.String() + "\n")
+		}
+		schemaErrors.WriteString(source)
+		return errors.New(schemaErrors.String())
+	}
+	return nil
+}
+
+func (s *Schema) ValidateSchema() error {
+	sl := gojsonschema.NewSchemaLoader()
+	sl.Validate = true
+	schemaErr := sl.AddSchemas(s.schema)
+	slog.Info("validate schema definition", "schemaloader", sl, "err", schemaErr)
+	return schemaErr
+}

internal/config/schema_test.go

@@ -0,0 +1,47 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config 
+
+import (
+	"encoding/json"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestNewSchema(t *testing.T) {
+	s := NewSchema("document")
+	assert.NotEqual(t, nil, s)
+}
+
+func TestSchemaValidateJSON(t *testing.T) {
+//	ctx := context.Background()
+	s := NewSchema("block")
+	assert.NotNil(t, s)
+
+	assert.Nil(t, s.ValidateSchema())
+
+	configBlockYaml := `
+type: "generic"
+name: "foo"
+values:
+  bar: quuz
+`
+
+	testConfig := NewGeneric[any]()
+
+	e := testConfig.LoadYAML(configBlockYaml)
+	assert.Nil(t, e)
+
+	jsonDoc, jsonErr := json.Marshal(testConfig)
+	assert.Nil(t, jsonErr)
+
+	schemaErr := s.Validate(string(jsonDoc))
+	assert.Nil(t, schemaErr)
+}
+
+func TestSchemaValidateSchema(t *testing.T) {
+	s := NewSchema("document")
+	assert.NotNil(t, s)
+
+	assert.Nil(t, s.ValidateSchema())
+}

internal/config/schemas/block.schema.json

@@ -0,0 +1,25 @@
+{
+  "$id": "block.schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "block",
+  "type": "object",
+  "required": [ "name", "values" ],
+  "properties": {
+    "name": {
+      "type": "string",
+      "description": "Config block name",
+      "minLength": 2
+    },
+    "type": {
+      "type": "string",
+      "description": "Config type name.",
+      "enum": [ "system", "generic", "exec", "certificate" ]
+    },
+    "values": {
+      "oneOf": [
+        { "type": "object" },
+        { "$ref": "certificate.schema.json" }
+      ]
+    }
+  }
+}

internal/config/schemas/certificate.schema.json

@@ -0,0 +1,62 @@
+{
+  "$id": "certificate.schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "certificate",
+  "type": "object",
+  "required": [ "path", "filetype" ],
+  "properties": {
+    "SerialNumber": {
+      "type": "integer",
+			"description": "Serial number",
+			"minLength": 1
+    },
+    "Issuer": {
+      "$ref": "pkixname.schema.json"
+    },
+    "Subject": {
+      "$ref": "pkixname.schema.json"
+    },
+    "NotBefore": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Cert is not valid before time in YYYY-MM-DDTHH:MM:SS.sssssssssZ format."
+    },
+    "NotAfter": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Cert is not valid after time in YYYY-MM-DDTHH:MM:SS.sssssssssZ format."
+    },
+    "KeyUsage": {
+			"type": "integer",
+      "enum": [
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        9
+      ],
+      "description": "Actions valid for a key.  E.g. 1 = KeyUsageDigitalSignature"
+    },
+    "ExtKeyUsage": {
+      "type": "array",
+      "items": {
+        "type": "integer",
+        "minimum": 0,
+        "maximum": 13
+      },
+      "description": "Extended set of actions valid for a key"
+    },
+    "BasicConstraintsValid": {
+      "type": "boolean",
+      "description": "BasicConstraintsValid indicates whether IsCA, MaxPathLen, and MaxPathLenZero are valid"
+    },
+    "IsCA": {
+      "type": "boolean",
+      "description": ""
+    }
+  }
+}

internal/config/schemas/config.schema.json

@@ -0,0 +1,18 @@
+{
+  "$id": "config.schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "config",
+  "type": "object",
+  "required": [ "configurations" ],
+  "properties": {
+    "configurations": {
+      "type": "array",
+      "description": "Configurations list",
+      "items": {
+        "oneOf": [
+          { "$ref": "block.schema.json" }
+        ]
+      }
+    }
+  }
+}

internal/config/schemas/document.schema.json

@@ -0,0 +1,19 @@
+{
+  "$id": "document.schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "document",
+  "type": "object",
+  "required": [ "configurations" ],
+  "properties": {
+    "configurations": {
+      "type": "array",
+      "description": "Configurations list",
+      "items": {
+        "oneOf": [
+          { "$ref": "block.schema.json" }
+        ]
+      }
+    }
+  }
+}
+

internal/config/schemas/pkixname.schema.json

@@ -0,0 +1,65 @@
+{
+  "$id": "pkixname.schema.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "pkixname",
+  "type": "object",
+  "properties": {
+    "Country": {
+      "type": "array",
+			"description": "Country name",
+      "items": {
+        "type": "string"
+      }
+    },
+    "Organization": {
+      "type": "array",
+			"description": "Organization name",
+      "items": {
+        "type": "string"
+      }
+    },
+    "OrganizationalUnit": {
+      "type": "array",
+			"description": "Organizational Unit name",
+      "items": {
+        "type": "string"
+      }
+    },
+    "Locality": {
+      "type": "array",
+			"description": "Locality name",
+      "items": {
+        "type": "string"
+      }
+    },
+    "Province": {
+      "type": "array",
+			"description": "Province name",
+      "items": {
+        "type": "string"
+      }
+    },
+    "StreetAddress": {
+      "type": "array",
+			"description": "Street address",
+      "items": {
+        "type": "string"
+      }
+    },
+    "PostalCode": {
+      "type": "array",
+			"description": "Postal Code",
+      "items": {
+        "type": "string"
+      }
+    },
+    "SerialNumber": {
+      "type": "string",
+      "description": ""
+    },
+    "CommonName": {
+      "type": "string",
+      "description": "Name"
+    }
+  }
+}

internal/config/system.go

@@ -0,0 +1,97 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"context"
+	"encoding/json"
+	"net/url"
+	"fmt"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"runtime"
+	"decl/internal/system"
+)
+
+// Collects facts about the system
+
+var (
+	buildValues = map[string]any{
+		"GOOS": runtime.GOOS,
+		"GOARCH": runtime.GOARCH,
+	}
+)
+
+func init() {
+	folio.DocumentRegistry.ConfigurationTypes.Register([]string{"system"}, func(u *url.URL) data.Configuration {
+		s := NewSystem()
+		return s
+	})
+}
+
+type System Generic[any]
+
+func NewSystem() *System {
+	s := make(System)
+	for k, v := range buildValues {
+		s[k] = v
+	}
+	s.CurrentUser()
+	s["importpath"] = []string {
+		"/etc/jx/lib",
+	}
+	return &s
+}
+
+func (s *System) CurrentUser() {
+	processUser := system.ProcessUser()
+	processGroup := system.ProcessGroup(processUser)
+	(*s)["user"] = processUser.Username
+	(*s)["gecos"] = processUser.Name
+	(*s)["home"] = processUser.HomeDir
+	(*s)["uid"] = processUser.Uid
+	(*s)["group"] = processGroup.Name
+	(*s)["gid"] = processUser.Gid
+}
+
+func (s *System) URI() string {
+	return fmt.Sprintf("%s://%s", s.Type(), "")
+}
+
+func (s *System) SetURI(uri string) error {
+        return nil
+}
+
+func (s *System) SetParsedURI(uri data.URIParser) error {
+        return nil
+}
+
+func (s *System) Clone() data.Configuration {
+	jsonSystem, _ := json.Marshal(s)
+	clone := NewSystem()
+	if unmarshalErr := json.Unmarshal(jsonSystem, clone); unmarshalErr != nil {
+		panic(unmarshalErr)
+	}
+	return clone
+}
+
+func (s *System) Has(key string) (ok bool) {
+	_, ok = (*s)[key]
+	return
+}
+
+func (s *System) Type() string {
+	return "system"
+}
+
+func (s *System) Read(context.Context) ([]byte, error) {
+	return nil, nil
+}
+
+func (s *System) GetValue(name string) (result any, err error) {
+	var ok bool
+	if result, ok = (*s)[name]; !ok {
+		err = data.ErrUnknownConfigurationKey
+	}
+	return
+}

internal/config/system_test.go

@@ -0,0 +1,20 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package config
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestNewSystemConfig(t *testing.T) {
+	s := NewSystem()
+	assert.NotNil(t, s)
+}
+
+func TestSystemConfig(t *testing.T) {
+	s := NewSystem()
+	assert.NotNil(t, s)
+
+	assert.True(t, s.Has("GOARCH"))
+}

internal/data/block.go

@@ -0,0 +1,24 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"errors"
+)
+
+var (
+	ErrConfigUndefinedName = errors.New("Config block is missing a defined name")
+)
+
+
+type Block interface {
+	Identifier
+	ConfigurationType() TypeName
+	Loader
+	Validator
+	NewConfiguration(uri *string) error
+	ConfigurationValueGetter
+	Configuration() Configuration
+	Clone() Block
+}
+

internal/data/config.go

@@ -0,0 +1,29 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"errors"
+)
+
+var (
+	ErrUnknownConfigurationType             = errors.New("Unknown configuration type")
+	ErrUnknownConfigurationKey              = errors.New("Unknown configuration key")
+)
+
+type ConfigurationValueGetter interface {
+	GetValue(key string) (any, error)
+}
+
+type ConfigurationValueChecker interface {
+	Has(key string) bool
+}
+
+type Configuration interface {
+	Identifier
+	Type() string
+	Reader
+	ConfigurationValueGetter
+	ConfigurationValueChecker
+	Clone() Configuration
+}

internal/data/converter.go

@@ -0,0 +1,40 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"errors"
+)
+
+var (
+	ErrUnsupportedConversion = errors.New("Unsupported conversion")
+)
+
+// Convert a resource to a document and a document to a resource
+
+type Emitter interface {
+	Emit(document Document, filter ElementSelector) (Resource, error)
+}
+
+type Extractor interface {
+	Extract(resource Resource, filter ElementSelector) (Document, error)
+}
+
+type Converter interface {
+	Typer
+	Emitter
+	Extractor
+	Close() error
+}
+
+type ManyExtractor interface {
+	ExtractMany(resource Resource, filter ElementSelector) ([]Document, error)
+}
+
+type ManyEmitter interface {
+	EmitMany(documents []Document, filter ElementSelector) (Resource, error)
+}
+
+type DirectoryConverter interface {
+	SetRelative(flag bool)
+}

internal/data/data.go

@@ -0,0 +1,38 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"context"
+)
+
+type Validator interface {
+	Validate() error
+}
+
+type Creator interface {
+	Create(context.Context) error
+}
+
+type Reader interface {
+	Read(context.Context) ([]byte, error)
+}
+
+type Updater interface {
+	Update(context.Context) error
+}
+
+type Deleter interface {
+	Delete(context.Context) error
+}
+
+type Info interface {
+	ReadStat() error
+}
+
+type Crudder interface {
+	Creator
+	Reader
+	Updater
+	Deleter
+}

internal/data/document.go

@@ -0,0 +1,76 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"context"
+	"errors"
+	"decl/internal/codec"
+	"io"
+	"decl/internal/mapper"
+)
+
+var (
+	ErrEmptyDocument error = errors.New("Document contains no resources")
+)
+
+type Serializer interface {
+	JSON() ([]byte, error)
+	YAML() ([]byte, error)
+	PB() ([]byte, error)
+	Generate(w io.Writer) (error)
+}
+
+type Loader interface {
+	LoadString(string, codec.Format) (error)
+	Load([]byte, codec.Format) (error)
+	LoadReader(io.ReadCloser, codec.Format) (error)
+}
+
+type DocumentGetter interface {
+	GetDocument() Document
+}
+
+type DocumentStateTransformer interface {
+	Apply(overrideState string) error
+}
+
+type Document interface {
+	GetURI() string
+	Serializer
+	Loader
+	Validator
+	mapper.Mapper
+
+	NewResource(uri string) (Resource, error)
+	NewResourceFromParsedURI(uri URIParser) (Resource, error)
+	AddDeclaration(Declaration)
+	AddResourceDeclaration(resourceType string, resourceDeclaration Resource)
+
+	Types() (TypesRegistry[Resource])
+//	Resources() []Declaration
+
+	SetConfig(config Document)
+	ConfigDoc() Document
+
+	HasConfig(string) bool
+	GetConfig(string) Block
+
+	Apply(state string) error
+	Len() int
+	ResolveIds(ctx context.Context)
+	Filter(filter DeclarationSelector) []Declaration
+	Declarations() []Declaration
+
+	CheckConstraints() bool
+	Failures() int
+
+	ImportedDocuments() []Document
+
+	ConfigFilter(filter BlockSelector) []Block
+	AppendConfigurations([]Document)
+	Diff(with Document, output io.Writer) (returnOutput string, diffErr error)
+	DiffState(output io.Writer) (returnOutput string, diffErr error)
+	Clone() Document
+	AddError(error)
+}

internal/data/identifier.go

@@ -0,0 +1,50 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"errors"
+	"net/url"
+	"decl/internal/transport"
+)
+
+var (
+	ErrInvalidURI error = errors.New("Invalid URI")
+)
+
+type URIParser interface {
+	URL() *url.URL
+	NewResource(document Document) (newResource Resource, err error)
+	ConstructResource(res Resource) (err error)
+	Converter() (converter Converter, err error)
+	Exists() bool
+
+	ContentReaderStream() (*transport.Reader, error)
+	ContentWriterStream() (*transport.Writer, error)
+
+	String() string
+	SetURL(url *url.URL)
+	Extension() (string, string)
+
+	ContentType() string
+	IsEmpty() bool
+}
+
+type Identifier interface {
+	URI() string
+	SetParsedURI(URIParser) error
+}
+
+type DocumentElement interface {
+	Identifier
+}
+
+type Selector[Item comparable] func(r Item) bool
+
+type ResourceSelector Selector[Resource]
+
+type DeclarationSelector Selector[Declaration]
+
+type BlockSelector Selector[Block]
+
+type ElementSelector Selector[DocumentElement]

internal/data/resource.go

@@ -0,0 +1,115 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"context"
+	"errors"
+	"decl/internal/mapper"
+	"decl/internal/transport"
+	"gitea.rosskeen.house/rosskeen.house/machine"
+	"io"
+	"io/fs"
+)
+
+var (
+	ErrInvalidResource error = errors.New("Invalid resource")
+)
+
+type ResourceMapper mapper.Map[string, Declaration]
+
+type StateTransformer interface {
+	Apply() error
+}
+
+// Used by the resource factory to initialize new resources.
+type ResourceInitializer interface {
+	Init(uri URIParser) error
+}
+
+type Resource interface {
+	Identifier
+	Type() string
+	StateMachine() machine.Stater
+	UseConfig(config ConfigurationValueGetter)
+	ResolveId(context.Context) string
+	Loader
+	StateTransformer
+	Crudder
+	Validator
+	Clone() Resource
+	SetResourceMapper(ResourceMapper)
+}
+
+type Declaration interface {
+	Identifier
+	ResourceType() TypeName
+	ResolveId(context.Context) string
+	Loader
+	Validator
+	DocumentStateTransformer
+	Resource() Resource
+	Clone() Declaration
+}
+
+func NewResourceMapper() ResourceMapper {
+	return mapper.New[string, Declaration]()
+}
+
+type ContentHasher interface {
+	Hash() []byte
+	HashHexString() string
+}
+
+type ContentIdentifier interface {
+	ContentType() string
+}
+
+type ContentReader interface {
+	ContentReaderStream() (*transport.Reader, error)
+}
+
+type ContentWriter interface {
+	ContentWriterStream() (*transport.Writer, error)
+}
+
+type ContentReadWriter interface {
+	ContentReader
+	ContentWriter
+}
+
+type ContentGetter interface {
+	GetContent(w io.Writer) (contentReader io.ReadCloser, err error)
+}
+
+type ContentSetter interface {
+	SetContent(r io.Reader) error
+}
+
+type ContentGetSetter interface {
+	ContentGetter
+	ContentSetter
+}
+
+type FileResource interface {
+	SetBasePath(int)
+	FilePath() string
+	SetFileInfo(fs.FileInfo) error
+	FileInfo() fs.FileInfo
+	ContentGetSetter
+	GetContentSourceRef() string
+	SetContentSourceRef(uri string)
+	SetFS(fs.FS)
+	PathNormalization(bool)
+	NormalizePath() error
+	GetTarget() string
+	SetGzipContent(bool)
+}
+
+type Signed interface {
+	Signature() Signature
+}
+
+type FileInfoGetter interface {
+	Stat() (fs.FileInfo, error)
+}

internal/data/signature.go

@@ -0,0 +1,12 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+)
+
+type Signature interface {
+	Verify(ContentHasher) error
+	SetHexString(string) error
+	String() string
+}

internal/data/stater.go

@@ -0,0 +1,50 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"gitea.rosskeen.house/rosskeen.house/machine"
+)
+
+func StorageMachine(sub machine.Subscriber) machine.Stater {
+// start_destroy -> absent -> start_create -> present -> start_destroy
+	stater := machine.New("unknown")
+	stater.AddStates("initialized", "unkonwn", "absent", "start_create", "present", "start_delete", "start_read", "start_update")
+	stater.AddTransition("construct", machine.States("unknown"), "initialized")
+	stater.AddTransition("create", machine.States("unknown", "initialized", "absent"), "start_create")
+	if e := stater.AddSubscription("create", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("created", machine.States("start_create"), "present")
+	if e := stater.AddSubscription("created", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("exists", machine.States("unknown", "initialized", "absent"), "present")
+	if e := stater.AddSubscription("exists", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("notexists", machine.States("*"), "absent")
+	if e := stater.AddSubscription("notexists", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("read", machine.States("*"), "start_read")
+	if e := stater.AddSubscription("read", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("state_read", machine.States("start_read"), "present")
+	stater.AddTransition("update", machine.States("*"), "start_update")
+	if e := stater.AddSubscription("update", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("updated", machine.States("start_update"), "present")
+	stater.AddTransition("delete", machine.States("*"), "start_delete")
+	if e := stater.AddSubscription("delete", sub); e != nil {
+		return nil
+	}
+	stater.AddTransition("deleted", machine.States("start_delete"), "absent")
+	if e := stater.AddSubscription("deleted", sub); e != nil {
+		return nil
+	}
+	return stater
+}
+

internal/data/types.go

@@ -0,0 +1,25 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package data
+
+import (
+	"net/url"
+)
+
+type Factory[Product comparable] func(*url.URL) Product
+
+type TypesRegistry[Product comparable] interface {
+	New(uri string) (result Product, err error)
+	NewFromParsedURI(uri *url.URL) (result Product, err error)
+	NewFromType(typename string) (result Product, err error)
+	Has(typename string) bool
+	//Get(string) Factory[Product] 
+}
+
+type TypeName string //`json:"type"`
+
+func (t TypeName) String() string { return string(t) }
+
+type Typer interface {
+	Type() TypeName
+}

internal/ds/orderedset.go

@@ -0,0 +1,63 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ds
+
+import (
+	"log/slog"
+)
+
+type OrderedSet[Value comparable] struct {
+	Values []*Value
+	elements map[Value]int
+}
+
+func NewOrderedSet[Value comparable]() *OrderedSet[Value] {
+	return &OrderedSet[Value]{ elements: make(map[Value]int), Values: make([]*Value, 0, 10) }
+}
+
+func (s *OrderedSet[Value]) Add(value Value) {
+	slog.Info("OrderedSet.Add", "key", value, "s", s)
+	s.Values = append(s.Values, &value)
+	s.elements[value] = len(s.Values)
+	slog.Info("OrderedSet.Add", "key", value, "s", s, "v", &s.Values)
+}
+
+func (s *OrderedSet[Value]) Delete(key Value) {
+	slog.Info("OrderedSet.Delete", "key", key, "s", s, "size", len(s.Values))
+	if i, ok := s.elements[key]; ok {
+		i--
+		s.Values[i] = nil
+		delete(s.elements, key)
+	}
+}
+
+func (s *OrderedSet[Value]) Contains(value Value) (result bool) {
+	slog.Info("OrderedSet.Contains", "key", value, "s", s, "size", len(s.Values), "v", &s.Values)
+	_, result = s.elements[value]
+	return
+}
+
+func (s *OrderedSet[Value]) Len() int {
+    return len(s.elements)
+}
+
+func (s *OrderedSet[Value]) AddItems(value []Value) {
+	for _, v := range value {
+		s.Add(v)
+	}
+}
+
+func (s *OrderedSet[Value]) Items() []*Value {
+	slog.Info("OrderedSet.Items - start", "s", s)
+	result := make([]*Value, 0, len(s.elements) - 1)
+	for _, v := range s.Values {
+		slog.Info("OrderedSet.Items", "value", v)
+		if v != nil {
+			result = append(result, v)
+			s.elements[*v] = len(result)
+		}
+	}
+	slog.Info("OrderedSet.Items", "s", s, "result", result)
+	s.Values = result
+	return result
+}

internal/ds/orderedset_test.go

@@ -0,0 +1,51 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ds
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"log/slog"
+)
+
+var (
+)
+
+func TestNewOrderedSet(t *testing.T) {
+	s := NewOrderedSet[string]()
+	assert.NotNil(t, s)
+
+	testValues := []string{
+		"foo",
+		"bar",
+		"baz",
+		"quuz",
+	}
+
+	for _,value := range testValues {
+
+		s.Add(value)
+
+
+		slog.Info("TestNewOrderedSet - ADD", "item", value, "s", s)
+
+		assert.True(t, s.Contains(value))
+		slog.Info("TestNewOrderedSet - CONTAINS", "s", s)
+
+		for x, item := range s.Items() {
+			slog.Info("TestNewOrderedSet", "item", item, "s", s)
+			assert.Equal(t, testValues[x], *item)
+		}
+
+	}
+	s.Delete("bar")
+
+	expectedValues := []string {
+		"foo",
+		"baz",
+		"quuz",
+	}
+	for x, item := range s.Items() {
+		assert.Equal(t, expectedValues[x], *item)
+	}
+}

internal/ds/set.go

@@ -0,0 +1,34 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ds
+
+import (
+)
+
+type Set[Value comparable] map[Value]bool
+
+func NewSet[Value comparable]() Set[Value] {
+	return make(map[Value]bool)
+}
+
+func (s Set[Value]) Add(value Value) {
+	s[value] = true
+}
+
+func (s Set[Value]) Delete(value Value) {
+    delete(s, value)
+}
+
+func (s Set[Value]) Contains(value Value) bool {
+    return s[value]
+}
+
+func (s Set[Value]) Len() int {
+    return len(s)
+}
+
+func (s Set[Value]) AddSlice(value []Value) {
+	for _, v := range value {
+		s.Add(v)
+	}
+}

internal/ds/set_test.go

@@ -0,0 +1,24 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ds
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+var (
+)
+
+func TestNewSet(t *testing.T) {
+	s := NewSet[string]()
+	assert.NotNil(t, s)
+	s["foo"] = true
+	assert.True(t, s.Contains("foo"))
+
+	s.Add("bar")
+	
+	assert.True(t, s.Contains("bar"))
+
+	
+}

internal/ext/addcloser.go

@@ -0,0 +1,31 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"io"
+)
+
+type Closer func() error
+
+func WriteAddCloser(w io.WriteCloser, c Closer) io.WriteCloser {
+	a := writeAddCloser{ WriteCloser: w, AddClose: func() (err error) {
+		if err = w.Close(); err != nil {
+			return
+		}
+		if c != nil {
+			return c()
+		}
+		return
+	} }
+	return a
+}
+
+type writeAddCloser struct {
+	io.WriteCloser
+	AddClose Closer
+}
+
+func (w writeAddCloser) Close() error {
+	return w.AddClose()
+}

internal/ext/addcloser_test.go

@@ -0,0 +1,19 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"testing"
+	"github.com/stretchr/testify/assert"
+	"strings"
+_	"fmt"
+_	"log"
+)
+
+func TestNewWriteAddCloser(t *testing.T) {
+	var testWriter strings.Builder
+
+	closer := WriteAddCloser(WriteNopCloser(&testWriter), func() error { testWriter.Write([]byte("foo")); return nil })
+	closer.Close()
+	assert.Equal(t, "foo", testWriter.String())
+}

internal/ext/basicreader.go

@@ -0,0 +1,25 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"io"
+)
+
+// Restrict the underlying io.Reader to only exposed the io.Reader interface.
+// Removes the io.WriterTo interface.
+func NewReadCloser(r io.ReadCloser) io.ReadCloser {
+	return basicReadCloser{r}
+}
+
+type basicReadCloser struct {
+	io.ReadCloser
+}
+
+func NewReader(r io.Reader) io.Reader {
+	return basicReader{r}
+}
+
+type basicReader struct {
+	io.Reader
+}

internal/ext/basicreader_test.go

@@ -0,0 +1,30 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"testing"
+	"github.com/stretchr/testify/assert"
+	"strings"
+_	"fmt"
+_	"log"
+	"io"
+)
+
+func TestNewBasicReader(t *testing.T) {
+	testReader := strings.NewReader("some test data")
+	basicReader := NewReader(testReader)
+	assert.NotNil(t, basicReader)
+	_, ok := basicReader.(io.WriterTo)
+	assert.False(t, ok)
+}
+
+func TestNewBasicReadCloser(t *testing.T) {
+	testReader := strings.NewReader("some test data")
+	basicReader := NewReadCloser(io.NopCloser(testReader))
+	assert.NotNil(t, basicReader)
+	_, ok := basicReader.(io.WriterTo)
+	assert.False(t, ok)
+	_, hasCloser := basicReader.(io.Closer)
+	assert.True(t, hasCloser)
+}

internal/ext/file.go

@@ -0,0 +1,26 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"os"
+	"path/filepath"
+)
+
+type FilePath string
+
+func (f *FilePath) Exists() bool {
+	_, err := os.Stat(string(*f))
+	return !os.IsNotExist(err)
+}
+
+func (f *FilePath) Add(relative string) {
+	newPath := filepath.Join(string(*f), relative)
+	*f = FilePath(newPath)
+}
+
+
+func (f FilePath) Abs() FilePath {
+	result, _ := filepath.Abs(string(f))
+	return FilePath(result)
+}

internal/ext/nopwritecloser.go

@@ -0,0 +1,17 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"io"
+)
+
+func WriteNopCloser(w io.Writer) io.WriteCloser {
+	return writeNopCloser{w}
+}
+
+type writeNopCloser struct {
+	io.Writer
+}
+
+func (writeNopCloser) Close() error { return nil }

internal/ext/nopwritecloser_test.go

@@ -0,0 +1,21 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"testing"
+	"github.com/stretchr/testify/assert"
+	"strings"
+_	"fmt"
+_	"log"
+)
+
+func TestNewWriteNopCloser(t *testing.T) {
+	var testWriter strings.Builder
+	closer := WriteNopCloser(&testWriter)
+	assert.NotNil(t, closer)
+	_, err := closer.Write([]byte("test data"))
+	assert.Nil(t, err)
+	assert.Equal(t, "test data", testWriter.String())
+	assert.Nil(t, closer.Close())
+}

internal/ext/stringreader.go

@@ -0,0 +1,16 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"io"
+	"strings"
+)
+
+func NewStringReader(value string) io.Reader {
+	return stringReader{strings.NewReader(value)}
+}
+
+type stringReader struct {
+	io.Reader
+}

internal/ext/stringreader_test.go

@@ -0,0 +1,18 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package ext
+
+import (
+	"testing"
+	"github.com/stretchr/testify/assert"
+_	"fmt"
+_	"log"
+	"io"
+)
+
+func TestNewStringReader(t *testing.T) {
+	basicReader := NewStringReader("some test data")
+	assert.NotNil(t, basicReader)
+	_, ok := basicReader.(io.WriterTo)
+	assert.False(t, ok)
+}

internal/fan/container.go

@@ -0,0 +1,77 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+_	"path/filepath"
+	"decl/internal/resource"
+	"decl/internal/folio"
+	"decl/internal/data"
+_	"os"
+_	"io"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/client"
+	"log/slog"
+)
+
+type Container struct {
+	apiClient resource.ContainerClient
+}
+
+func NewContainer(containerClientApi resource.ContainerClient) *Container {
+	var apiClient resource.ContainerClient = containerClientApi
+	if apiClient == nil {
+		var err error
+		apiClient, err = client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
+		if err != nil {
+			panic(err)
+		}
+	}
+	return &Container{
+		apiClient: apiClient,
+	}
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"container"}, func(u *url.URL) data.Converter {
+		c := NewContainer(nil)
+		return c
+	})
+
+}
+
+func (c *Container) Type() data.TypeName { return "container" }
+
+func (c *Container) Extract(sourceResource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	var extractErr error
+	ctx := context.Background()
+	slog.Info("container source Extract()", "container", c) 
+	containers, err := c.apiClient.ContainerList(ctx, container.ListOptions{All: true})
+	if err != nil {
+		return nil, err
+	}
+
+	document = folio.DocumentRegistry.NewDocument(folio.URI(sourceResource.URI()))
+	for _, container := range containers {
+		runningContainer := resource.NewContainer(nil)
+		if inspectErr := runningContainer.Inspect(ctx, container.ID); inspectErr != nil {
+			extractErr = fmt.Errorf("%w: %w", extractErr, inspectErr)
+		}
+		document.(*folio.Document).AddResourceDeclaration("container", runningContainer)
+	}
+
+	return document, extractErr
+}
+
+func (c *Container) Emit(document data.Document, filter data.ElementSelector) (resource data.Resource, err error) {
+	return nil, nil
+}
+
+func (c *Container) Close() error {
+	return nil
+}

internal/fan/dir.go

@@ -0,0 +1,174 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+	"path/filepath"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"os"
+_	"io"
+	"log/slog"
+	"decl/internal/fs"
+)
+
+type Dir struct {
+	Path string `yaml:"path" json:"path"`
+	Relative bool `yaml:"relative" json:"relative"`
+	subDirsStack []string `yaml:"-" json:"-"`
+	fs *fs.WalkDir `yaml:"-" json:"-"`
+}
+
+func NewDir() *Dir {
+	return &Dir{
+		subDirsStack: make([]string, 0, 100),
+	}
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"file"}, func(u *url.URL) data.Converter {
+		t := NewDir()
+		t.Path,_ = filepath.Abs(filepath.Join(u.Hostname(), u.Path))
+		t.Relative = false
+		return t
+	})
+
+}
+
+func (d *Dir) SetRelative(flag bool) { d.Relative = flag }
+
+func (d *Dir) Type() data.TypeName { return "dir" }
+
+func (d *Dir) ExtractDirectory(path string, document data.Document) (err error) {
+	ctx := context.Background()
+	files, readDirErr := os.ReadDir(path)
+	slog.Info("fan.Dir.ExtractDirectory()", "path", path, "error", readDirErr)
+	if readDirErr != nil {
+		return readDirErr
+	}
+
+	for _,file := range files {
+		filePath := filepath.Join(path, file.Name())
+		u := fmt.Sprintf("file://%s", filePath)
+		var f data.Resource
+		if f, err = document.NewResource(u); err != nil {
+			return
+		}
+		if _, err = f.Read(ctx); err != nil {
+			return
+		}
+
+		if file.IsDir() {
+			d.subDirsStack = append(d.subDirsStack, filePath)
+		}
+	}
+	return nil
+}
+
+func (d *Dir) isParent(m *map[string]int, path string, containingDirectoryPath string) (newCDP string, cdpCount int) {
+	newCDP = containingDirectoryPath
+	cdpCount = (*m)[containingDirectoryPath]
+	pathLen := len(path)
+	for i, p := range path {
+		if p == '/' || i == pathLen {
+			sPath := path[:i]
+			if len(sPath) > 0 {
+				(*m)[sPath]++
+				superDirCount := (*m)[sPath]
+				if superDirCount >= cdpCount {
+					newCDP = sPath
+					cdpCount = superDirCount
+				}
+			}
+		}
+	}
+	return
+}
+
+func (d *Dir) LCPath(files []string) (lcPath string) {
+	parentPaths := make(map[string]int)
+	var containingDirectoryPath string
+	for _,filePath := range files {
+		containingDirectoryPath, _ = d.isParent(&parentPaths, filePath, containingDirectoryPath)
+	}
+	lcPath = containingDirectoryPath
+	return
+}
+
+func (d *Dir) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	if document == nil || document.Len() <= 0 {
+		return nil, ErrEmptyDocument
+	}
+
+	parentPaths := make(map[string]int)
+	var containingDirectoryPath string
+	for _,res := range document.Filter(func(d data.Declaration) bool {
+		return d.ResourceType() == "file"
+	}) {
+		var f data.FileResource = res.(*folio.Declaration).Attributes.(data.FileResource)
+		var parent string
+
+		if f.FileInfo().IsDir() {
+			parent, err = filepath.Abs(f.FilePath())
+		} else {
+			parent, err = filepath.Abs(filepath.Dir(f.FilePath()))
+		}
+		if err != nil {
+			return
+		}
+
+		containingDirectoryPath, _ = d.isParent(&parentPaths, parent, containingDirectoryPath)
+	}
+
+	uri := fmt.Sprintf("file://%s", containingDirectoryPath)
+
+	dirFileDeclaration := folio.NewDeclaration()
+	dirFileDeclaration.Type = "file"
+	if err = dirFileDeclaration.NewResource(&uri); err != nil {
+		return
+	}
+
+	resourceTarget = dirFileDeclaration.Attributes
+	return
+}
+
+func (d *Dir) Extract(resourceSource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	ctx := context.Background()
+	if resourceSource.Type() != "file" {
+		return nil, fmt.Errorf("%w", ErrInvalidResource)
+	}
+	slog.Info("fan.Dir.Extract()", "path", d.Path, "resource", resourceSource)
+	d.Path = resourceSource.(data.FileResource).FilePath()
+	document = folio.DocumentRegistry.NewDocument("")
+
+	d.fs = fs.NewWalkDir(os.DirFS(d.Path), d.Path, func(fsys fs.FS, path string, file fs.DirEntry) (err error) {
+		u := fmt.Sprintf("file://%s", path)
+		slog.Info("Fan.Dir.Extract() WalkDir", "file", u, "root", d.Path)
+		if path != "" {
+			var f data.Resource
+			if f, err = document.NewResource(u); err != nil {
+				return
+			}
+			if d.Relative {
+				f.(data.FileResource).SetBasePath(len(d.Path) + 1)
+				slog.Info("Fan.Dir.Extract() WalkDir Relative", "file", f, "path", path)
+			}
+			slog.Info("Fan.Dir.Extract() WalkDir Resource.Read", "file", f)
+			_, err = f.Read(ctx)
+		}
+		return
+	})
+
+	slog.Info("Fan.Dir.Extract()", "fs", d.fs)
+	err = d.fs.Walk(nil)
+	return
+}
+
+func (d *Dir) Close() error {
+	return nil
+}

internal/fan/dir_test.go

@@ -0,0 +1,130 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"decl/internal/folio"
+	"decl/internal/data"
+	"log/slog"
+	"path/filepath"
+	"os"
+	"fmt"
+)
+
+func TestNewDirSource(t *testing.T) {
+	s := NewDir()
+	assert.NotNil(t, s)
+}
+
+func TestExtractDirectory(t *testing.T) {
+	s := NewDir()
+	assert.NotNil(t, s)
+
+	document := folio.DocumentRegistry.NewDocument("")
+	assert.NotNil(t, document)
+
+	assert.Nil(t, s.ExtractDirectory(TempDir, document))
+	assert.Greater(t, 2, document.Len())
+
+}
+
+func TestIsParent(t *testing.T) {
+	s := NewDir()
+	assert.NotNil(t, s)
+	
+	m := map[string]int{
+		"/foo/bar": 3,
+		"/foo": 1,
+	}
+	res, count := s.isParent(&m, "/foo/bar/baz/quuz", "/foo/bar")
+
+	assert.Equal(t, "/foo/bar", res)
+	assert.Equal(t, 4, count)
+	assert.Equal(t, 2, m["/foo"])
+}
+
+func TestLCPath(t *testing.T) {
+	s := NewDir()
+	assert.NotNil(t, s)
+	result := s.LCPath([]string{
+		"/foo/bar/baz/quuz",
+		"/foo/bar/baz/quuz/abc.txt",
+		"/foo/bar/baz/quuz/def.txt",
+		"/foo/bar/baz/quz/ghi.txt",
+		"/foo/bar/kiw",
+		"/tmp",
+	})
+	assert.Equal(t, "/foo/bar", result)
+
+	result = s.LCPath([]string{
+		"/foo/bar/baz/quuz",
+		"/foo/eer/voo",
+		"/foo/bar/baz/quuz/abc.txt",
+		"/foo/bar/baz/quuz/def.txt",
+		"/foo/bar/baz/quz/ghi.txt",
+		"/foo/bar/kiw",
+		"/tmp",
+		"/usr",
+		"/usr/lib",
+	})
+	assert.Equal(t, "/foo", result)
+}
+
+func BenchmarkLCPath(b *testing.B) {
+	s := NewDir()
+	assert.NotNil(b, s)
+	for i := 0; i < b.N; i++ {
+		s.LCPath([]string{
+			"/foo/bar/baz/quuz",
+			"/foo/eer/voo",
+			"/foo/bar/baz/quuz/abc.txt",
+			"/foo/bar/baz/quuz/def.txt",
+			"/foo/bar/baz/quz/ghi.txt",
+			"/foo/bar/kiw",
+			"/tmp",
+			"/usr",
+			"/usr/lib",
+		})
+	}
+}
+
+func TestEmit(t *testing.T) {
+	s := NewDir()
+	assert.NotNil(t, s)
+
+	contextDir, _ := filepath.Abs(filepath.Join(TempDir, "context"))
+	etcDir := filepath.Join(contextDir, "etc")
+	binDir := filepath.Join(contextDir, "bin")
+	usrDir := filepath.Join(contextDir, "usr")
+	usrLibDir := filepath.Join(contextDir, "usr/lib")
+	usrBinDir := filepath.Join(contextDir, "usr/bin")
+
+	assert.Nil(t, os.Mkdir(contextDir, os.ModePerm))
+	assert.Nil(t, os.Mkdir(etcDir, os.ModePerm))
+	assert.Nil(t, os.Mkdir(binDir, os.ModePerm))
+	assert.Nil(t, os.Mkdir(usrDir, os.ModePerm))
+	assert.Nil(t, os.Mkdir(usrLibDir, os.ModePerm))
+	assert.Nil(t, os.Mkdir(usrBinDir, os.ModePerm))
+
+	
+	decl := folio.NewDeclaration()
+	srcFile := fmt.Sprintf("file://%s", contextDir)
+	resErr := decl.NewResource(&srcFile)
+	assert.Nil(t, resErr)
+
+	slog.Info("TestEmit()", "file", decl, "res", decl.Attributes)
+
+	document, extractErr := s.Extract(decl.Resource(), nil)
+	slog.Info("TestEmit() - Extract", "document", document, "error", extractErr)
+	assert.Nil(t, extractErr)
+	assert.Greater(t, document.Len(), 4)
+
+	res, emitErr := s.Emit(document, nil)
+	slog.Info("TestEmit()", "res", res, "error", emitErr)
+
+	assert.Nil(t, emitErr)
+	assert.Equal(t, contextDir, res.(data.FileResource).FilePath())
+	
+}

internal/fan/fan.go

@@ -0,0 +1,30 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"errors"
+)
+
+
+// Convert a resource to a document and a document to a resource
+/*
+type Emitter interface {
+	Emit(document *resource.Document) (resource.Resource, error)
+}
+
+type Extracter interface {
+	Extract(resource resource.Resource, filter resource.ResourceSelector) (*resource.Document, error)
+}
+
+type Converter interface {
+	Emitter
+	Extracter
+}
+*/
+
+var (
+	ErrInvalidSource error = errors.New("Invalid source")
+	ErrInvalidResource error = errors.New("Invalid resource")
+	ErrEmptyDocument error = errors.New("Document containers no resources")
+)

internal/fan/fan_test.go

@@ -0,0 +1,23 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"testing"
+	"os"
+	"log"
+)
+
+var TempDir string
+
+func TestMain(m *testing.M) {
+	var err error
+	TempDir, err = os.MkdirTemp("", "testfan")
+	if err != nil || TempDir == "" {
+		log.Fatal(err)
+	}
+	//folio.DocumentRegistry.ResourceTypes = resource.ResourceTypes
+	rc := m.Run()
+	os.RemoveAll(TempDir)
+	os.Exit(rc)
+}

internal/fan/group.go

@@ -0,0 +1,76 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+_	"context"
+_	"encoding/json"
+_	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+_	"path/filepath"
+	"decl/internal/resource"
+	"decl/internal/folio"
+	"decl/internal/data"
+_	"os"
+_	"io"
+	"log/slog"
+)
+
+type Group struct {
+	GroupType resource.GroupType `yaml:"type" json:"type"`
+}
+
+func NewGroup() *Group {
+	return &Group{ GroupType: resource.SystemGroupType }
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"group"}, func(u *url.URL) data.Converter {
+		groupSource := NewGroup()
+		groupType := u.Query().Get("type")
+		if len(groupType) > 0 {
+			groupSource.GroupType = resource.GroupType(groupType)
+		}
+		return groupSource
+	})
+
+}
+
+func (g *Group) Type() data.TypeName { return "group" }
+
+func (g *Group) Extract(sourceResource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	slog.Info("group source ExtractResources()", "group", g) 
+	Groups := make([]*resource.Group, 0, 100)
+	cmd := g.GroupType.NewReadGroupsCommand()
+	if cmd == nil {
+		return document, resource.ErrUnsupportedGroupType
+	}
+	if out, err := cmd.Execute(g); err == nil {
+		slog.Info("group source Extract()", "output", out)
+		if exErr := cmd.Extractor(out, &Groups); exErr != nil {
+			return document, exErr
+		}
+		document = folio.DocumentRegistry.NewDocument("group://-")
+		for _, grp := range Groups {
+			if grp == nil {
+				grp = resource.NewGroup()
+			}
+			grp.GroupType = g.GroupType
+			document.AddResourceDeclaration("group", grp)
+		}
+	} else {
+		slog.Info("group source ExtractResources()", "output", out, "error", err)
+		return document, err
+	}
+	return document, nil
+}
+
+func (g *Group) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	return nil, data.ErrUnsupportedConversion
+}
+
+func (g *Group) Close() error {
+	return nil
+}
+

internal/fan/http.go

@@ -0,0 +1,197 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+_	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+_	"net/http"
+_	"path/filepath"
+_	"decl/internal/resource"
+	"decl/internal/codec"
+	"decl/internal/data"
+	"decl/internal/folio"
+_	"os"
+	"io"
+	"errors"
+	"log/slog"
+)
+
+type HTTP struct {
+	Endpoint folio.URI `yaml:"endpoint,omitempty" json:"endpoint,omitempty"`
+	url *url.URL `yaml:"-" json:"-"`
+	Format codec.Format `yaml:"format,omitempty" json:"format,omitempty"`
+
+	reader io.ReadCloser `yaml:"-" json:"-"`
+	writer io.WriteCloser `yaml:"-" json:"-"`
+	decoder codec.Decoder `yaml:"-" json:"-"`
+	encoder codec.Encoder `yaml:"-" json:"-"`
+	closer func() error `yaml:"-" json:"-"`
+	index int `yaml:"-" json:"-"`
+	signature data.Signature `yaml:"-" json:"-"`
+}
+
+func NewHTTP() *HTTP {
+	return &HTTP{ Format: codec.FormatYaml, index: 0, closer: func() error { return nil } }
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"http","https"}, func(u *url.URL) data.Converter {
+		t := NewHTTP()
+		t.Endpoint = folio.URI(u.String())
+		t.url = u
+		return t
+	})
+}
+
+func (h *HTTP) Type() data.TypeName { return "http" }
+
+/*
+func (h *HTTP) setencoder(target data.ContentIdentifier) {
+	if formatErr := h.Format.Set(target.ContentType()); formatErr != nil {
+		h.Format = codec.FormatYaml
+		if format,ok := h.url.Query()["format"]; ok {
+			if queryFormatErr := h.Format.Set(format[0]); queryFormatErr != nil {
+				h.Format = codec.FormatYaml
+			}
+		}
+	}
+	if h.encoder == nil {
+		h.encoder = codec.NewEncoder(h.writer, h.Format)
+	}
+}
+*/
+
+func (h *HTTP) setdecoder(source data.ContentIdentifier) {
+	if h.decoder == nil {
+		_ = h.Format.Set(source.ContentType())
+		h.decoder = codec.NewDecoder(h.reader, h.Format)
+	}
+}
+
+func (h *HTTP) Extract(sourceResource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	if h.index == 0 {
+		if sourceResource == nil {
+			if len(h.Endpoint) > 0 {
+				sourceResource, err = h.Endpoint.NewResource(nil)
+			} else {
+				return nil, ErrInvalidSource
+			}
+		}
+		slog.Info("HTTP.Extract()", "source", sourceResource, "error", err)
+		var jxSourceFile data.FileResource = sourceResource.(data.FileResource)
+		h.reader, err = jxSourceFile.(data.ContentGetter).GetContent(nil)
+		slog.Info("HTTP.Extract()", "file", h, "error", err)
+		if err != nil {
+			return
+		}
+		h.signature = sourceResource.(data.Signed).Signature()
+		h.setdecoder(jxSourceFile.(data.ContentIdentifier))
+		slog.Info("HTTP.Extract()", "jx", h)
+	}
+
+	u := fmt.Sprintf("%s?index=%d", sourceResource.URI(), h.index)
+	document = folio.DocumentRegistry.NewDocument(folio.URI(u))
+	err = h.decoder.Decode(document)
+	slog.Info("HTTP.Extract()", "doc", document, "http", h, "error", err)
+	h.index++
+	if err != nil {
+		return
+	}
+	if err = document.Validate(); err != nil {
+		return
+	}
+
+	if h.signature.String() != "" {
+		if v, ok := sourceResource.(data.ContentHasher); ok {
+			err = h.signature.Verify(v)
+		}
+	}
+	return
+
+/*
+	defer h.Close()
+	documentSignature := h.transport.Signature()
+
+	hash := sha256.New()
+	sumReadData := iofilter.NewReader(h.transport, func(p []byte, readn int, readerr error) (n int, err error) {
+		hash.Write(p)
+		return 
+	})
+
+	decoder := codec.NewYAMLDecoder(sumReadData)
+	index := 0
+	for {
+		doc = folio.DocumentRegistry.NewDocument(folio.URI(u))
+
+		doc := resource.NewDocument()
+		e := decoder.Decode(doc)
+		if errors.Is(e, io.EOF) {
+			break
+		}
+		if e != nil {
+			return documents, e
+		}
+		if validationErr := doc.Validate(); validationErr != nil {
+			return documents, validationErr
+		}
+		documents = append(documents, doc)
+		index++
+	}
+
+	if documentSignature != "" {
+		sig := &signature.Ident{}
+		sigErr := sig.VerifySum(hash.Sum(nil), []byte(documentSignature))
+		if sigErr != nil {
+			return documents, sigErr
+		}
+	}
+*/
+}
+
+
+func (h *HTTP) ExtractMany(resourceSource data.Resource, filter data.ElementSelector) (documents []data.Document, err error) {
+	documents = make([]data.Document, 0, 100)
+	defer h.Close()
+
+	h.index = 0
+	for {
+		var doc data.Document
+		if doc, err = h.Extract(resourceSource, filter); err == nil {
+			documents = append(documents, doc)
+		} else {
+			if errors.Is(err, io.EOF) {
+				err = nil
+				//documents = append(documents, doc)
+			}
+			break
+		}
+	}
+	slog.Info("HTTP.ExtractMany()", "file", h, "error", err)
+	return
+}
+
+func (h *HTTP) Emit(document data.Document, filter data.ElementSelector) (resource data.Resource, err error) {
+	return nil, nil
+}
+
+func (h *HTTP) Close() (err error) {
+/*
+	if h.decoder != nil {
+		h.decoder.Close()
+	}
+*/
+	if h.encoder != nil {
+		h.encoder.Close()
+	}
+	if h.reader != nil {
+		h.reader.Close()
+	}
+	if h.writer != nil {
+		h.writer.Close()
+	}
+	return
+}

internal/fan/http_test.go

@@ -1,6 +1,6 @@
 // Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
 
-package source
+package fan
 
 import (
 	"github.com/stretchr/testify/assert"

internal/fan/iptable.go

@@ -0,0 +1,83 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+_	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+_	"path/filepath"
+	"decl/internal/data"
+	"decl/internal/resource"
+	"decl/internal/folio"
+_	"os"
+_	"io"
+	"strings"
+	"log/slog"
+)
+
+type Iptable struct {
+	Table string `yaml:"table" json:"table"`
+	Chain string `yaml:"chain" json:"chain"`
+}
+
+func NewIptable() *Iptable {
+	return &Iptable{}
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"iptable"}, func(u *url.URL) data.Converter {
+		t := NewIptable()
+		t.Table = u.Hostname()
+		elements := strings.FieldsFunc(u.Path, func(c rune) bool { return c == '/' })
+		if len(elements) >= 1 {
+			t.Chain = elements[0]
+		}
+		slog.Info("iptable chain source factory", "table", t, "uri", u, "table", u.Hostname()) 
+		return t
+	})
+
+}
+
+
+func (i *Iptable) Type() data.TypeName { return "iptable" }
+
+func (i *Iptable) Extract(sourceResource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+
+	slog.Info("fan.Iptable.Extract()", "table", i) 
+
+	iptRules := make([]*resource.Iptable, 0, 100)
+	cmd := resource.NewIptableReadChainCommand()
+	if cmd == nil {
+		return document, fmt.Errorf("Iptable read chain: invalid command")
+	}
+
+	var out []byte
+	if out, err = cmd.Execute(i); err == nil {
+
+		if err = cmd.Extractor(out, &iptRules); err == nil {
+			document = folio.DocumentRegistry.NewDocument(folio.URI(sourceResource.URI()))
+			for _, rule := range iptRules {
+				if rule == nil {
+					rule = resource.NewIptable()
+				}
+				rule.Table = resource.IptableName(i.Table)
+				rule.Chain = resource.IptableChain(i.Chain)
+				slog.Info("iptable chain source Extract()", "rule", rule)
+				document.(*folio.Document).AddResourceDeclaration("iptable", rule)
+			}
+		}
+	}
+	slog.Info("fan.Iptable.Extract()", "output", out, "error", err)
+	return document, err
+}
+
+func (i *Iptable) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	return nil, nil
+}
+
+func (i *Iptable) Close() error {
+	return nil
+}

internal/fan/jx.go

@@ -0,0 +1,274 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+	"path/filepath"
+	"decl/internal/codec"
+	"decl/internal/folio"
+	"decl/internal/data"
+_	"os"
+	"io"
+	"errors"
+	"log/slog"
+	"strings"
+)
+
+/* 
+	Converts a file container an encoded (yaml, json, etc) JX document into a Document by using `Extract` or
+	`ExtractMany`.
+	Converts a JX Document structure into a yaml, json, etc encoded resource.
+*/
+type JxFile struct {
+	Uri folio.URI `yaml:"uri,omitempty" json:"uri,omitempty"`
+	url *url.URL `yaml:"-" json:"-"`
+
+	emitResource data.Resource `yaml:"-" json:"-"`
+
+	Path string `yaml:"path" json:"path"`
+	Format codec.Format `yaml:"format,omitempty" json:"format,omitempty"`
+	reader io.ReadCloser `yaml:"-" json:"-"`
+	writer io.WriteCloser `yaml:"-" json:"-"`
+	decoder codec.Decoder `yaml:"-" json:"-"`
+	encoder codec.Encoder `yaml:"-" json:"-"`
+	closer func() error `yaml:"-" json:"-"`
+	index int `yaml:"-" json:"-"`
+}
+
+func NewJxFile() *JxFile {
+	return &JxFile{ Format: codec.FormatYaml, index: 0, closer: func() error { return nil } }
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"decl", "jx", "yaml", "yml", "json"}, func(u *url.URL) data.Converter {
+		j := NewJxFile()
+		j.SetURI(u)
+		return j
+	})
+
+	folio.DocumentRegistry.ConverterTypes.RegisterContentType([]string{"jx.yaml","jx.yml","jx.yaml.gz","jx.yml.gz", "jx.json", "jx.json.gz"}, func(u *url.URL) data.Converter {
+		j := NewJxFile()
+		slog.Info("JxFile.Factory", "jx", j)
+		j.SetURI(u)
+		slog.Info("JxFile.Factory", "jx", j)
+		return j
+	})
+}
+
+/* 
+	Schemes: file, json, yaml, yml, decl, jx, http, https, other transport schemes?
+	Format: URL scheme name, `format` query param, file extension
+
+	If the input url is a file
+	Detect Format
+*/
+func (j *JxFile) SetURI(u *url.URL) {
+	slog.Info("JxFile.SetURI()", "jx", j)
+	if ! errors.Is(j.Format.Set(u.Scheme), codec.ErrInvalidFormat) {
+		u.Scheme = "file"
+		q := u.Query()
+		q.Set("format", string(j.Format))
+		u.RawQuery = q.Encode()
+	} else {
+		if format,ok := u.Query()["format"]; ok {
+			_ = j.Format.Set(format[0])
+		}
+	}
+	if u.Scheme == "file" {
+		if u.Path == "" || u.Path == "-" {
+			j.Path = "-"
+		} else {
+			fileAbsolutePath, _ := filepath.Abs(filepath.Join(u.Hostname(), u.Path))
+			j.Path = fileAbsolutePath
+			if _, err := u.Parse(j.Path); err != nil {
+				panic(err)
+			}
+		}
+	} else {
+		j.Path = filepath.Join(u.Hostname(), u.RequestURI())
+	}
+	j.Uri.SetURL(u)
+	if j.Format == codec.FormatYaml {
+		exttype, ext := j.Uri.Extension()
+		if j.Format.Set(exttype) != nil {
+			_ = j.Format.Set(ext)
+		}
+	}
+}
+
+func (j *JxFile) setencoder(target data.ContentIdentifier) {
+	if formatErr := j.Format.Set(target.ContentType()); formatErr != nil {
+		j.Format = codec.FormatYaml
+		if format,ok := j.url.Query()["format"]; ok {
+			if queryFormatErr := j.Format.Set(format[0]); queryFormatErr != nil {
+				j.Format = codec.FormatYaml
+			}
+		}
+	}
+	if j.encoder == nil {
+		j.encoder = codec.NewEncoder(j.writer, j.Format)
+	}
+}
+
+func (j *JxFile) setdecoder(source data.ContentIdentifier) {
+	if j.decoder == nil {
+		for _,v := range strings.Split(source.ContentType(), ".") {
+			_ = j.Format.Set(v)
+		}
+		slog.Info("JxFile.setdecoder()", "type",  source.ContentType(), "format", j.Format)
+		j.decoder = codec.NewDecoder(j.reader, j.Format)
+	}
+	slog.Info("JxFile.setdecoder()", "decoder",  j.decoder)
+}
+
+func (j *JxFile) Type() data.TypeName { return "jx" }
+
+func (j *JxFile) Extract(resourceSource data.Resource, filter data.ElementSelector) (doc data.Document, err error) {
+	if j.index == 0 {
+		if resourceSource == nil {
+			if len(j.Uri) > 0 {
+				resourceSource, err = j.Uri.NewResource(nil)
+			} else {
+				return nil, ErrInvalidSource
+			}
+		}
+		slog.Info("JxFile.Extract()", "source", resourceSource, "error", err)
+		var jxSourceFile data.FileResource = resourceSource.(data.FileResource)
+		j.reader, err = jxSourceFile.(data.ContentGetter).GetContent(nil)
+		slog.Info("JxFile.Extract()", "jxfile", j, "error", err)
+		if err != nil {
+			return
+		}
+		j.setdecoder(jxSourceFile.(data.ContentIdentifier))
+		slog.Info("JxFile.Extract()", "jxfile", j)
+	}
+
+	uri := resourceSource.URI()
+	if folio.DocumentRegistry.HasDocument(folio.URI(uri)) {
+		uri = fmt.Sprintf("%s?index=%d", uri, j.index)
+	}
+	doc = folio.DocumentRegistry.NewDocument(folio.URI(uri))
+	err = j.decoder.Decode(doc)
+	slog.Info("JxFile.Extract()", "doc", doc, "jxfile", j, "error", err)
+	j.index++
+	if err != nil {
+		return
+	}
+	if err = doc.Validate(); err != nil {
+		return
+	}
+	return
+}
+
+func (j *JxFile) ExtractMany(resourceSource data.Resource, filter data.ElementSelector) (documents []data.Document, err error) {
+	documents = make([]data.Document, 0, 100)
+	defer j.Close()
+
+	j.index = 0
+	for {
+		var doc data.Document
+		if doc, err = j.Extract(resourceSource, filter); err == nil {
+			documents = append(documents, doc)
+		} else {
+			if errors.Is(err, io.EOF) {
+				err = nil
+				//documents = append(documents, doc)
+			}
+			break
+		}
+		slog.Info("JxFile.ExtractMany() loading", "document", j.index)
+	}
+	slog.Info("JxFile.ExtractMany()", "jxfile", j, "error", err)
+	return
+}
+
+func (j *JxFile) targetResource() (target data.Resource, err error) {
+	if j.emitResource == nil {
+		targetUrl := j.Uri.Parse().URL()
+		targetUrl.Scheme = "file"
+		q := targetUrl.Query()
+		q.Set("format", string(j.Format))
+		targetUrl.RawQuery = q.Encode()
+		j.Uri.SetURL(targetUrl)
+		slog.Info("JxFile.targetResource() SetURI", "uri", j.Uri, "targetUrl", targetUrl)
+		j.url = targetUrl
+		slog.Info("JxFile.targetResource()", "target", targetUrl, "jxfile", j)
+
+		if j.emitResource, err = j.Uri.NewResource(nil); err != nil {
+			return nil, err
+		}
+
+		var jxTargetFile data.FileResource = j.emitResource.(data.FileResource)
+		jxTargetFile.SetContentSourceRef(j.Uri.String())
+
+		slog.Info("JxFile.targetResource() SetContentSourceRef", "target", jxTargetFile, "uri", j.Uri.String())
+		j.writer, err = jxTargetFile.(data.ContentReadWriter).ContentWriterStream()
+		j.setencoder(j.emitResource.(data.ContentIdentifier))
+	}
+	target = j.emitResource
+	return 
+}
+
+func (j *JxFile) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	ctx := context.Background()
+
+	resourceTarget, err = j.targetResource()
+
+	if err != nil {
+		return
+	}
+
+	emitDoc := folio.DocumentRegistry.NewDocument("")
+	if err = document.Validate(); err != nil {
+		return
+	}
+
+	slog.Info("JxFile.Emit()", "document", document, "context", ctx)
+	for _, declaration := range document.Filter(func (d data.Declaration) bool {
+		if filter != nil {
+			return filter(d.(*folio.Declaration).Attributes) 
+		}
+		return true
+	}) {
+		//declaration.(*folio.Declaration).Resource().Read(ctx) // XXX added read here since it was removed from SetURI
+		emitDoc.ResourceDeclarations = append(emitDoc.ResourceDeclarations, declaration.(*folio.Declaration))
+	}
+
+	document.(*folio.Document).Format = j.Format
+	slog.Info("Emit", "target", j, "encoder", j.encoder, "emit", emitDoc)
+	if err = j.encoder.Encode(document); err != nil {
+		slog.Info("Emit", "err", err)
+		return
+	}
+	return
+}
+
+func (j *JxFile) EmitMany(documents []data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	for _, doc := range documents {
+		if resourceTarget, err = j.Emit(doc, filter); err != nil {
+			return
+		}
+	}
+	return 
+}
+
+func (j *JxFile) Close() (err error) {
+	if j.closer != nil {
+		err = j.closer()
+	}
+	if j.reader != nil {
+		j.reader.Close()
+	}
+	if j.encoder != nil {
+		j.encoder.Close()
+	}
+	if j.writer != nil {
+		j.writer.Close()
+	}
+	return
+}

internal/fan/jx_test.go

@@ -0,0 +1,46 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"decl/internal/codec"
+	"decl/internal/folio"
+	"decl/internal/data"
+	"net/url"
+)
+
+func TestNewJxSource(t *testing.T) {
+	s := NewJxFile()
+	assert.NotNil(t, s)
+}
+
+func TestJxSetURI(t *testing.T) {
+	for _,v := range []struct{ url string; expectedformat codec.Format; expecteduri string }{
+		{ url: "file://foo", expectedformat: codec.FormatYaml, expecteduri: "file://foo" },
+		{ url: "json://foo", expectedformat: codec.FormatJson, expecteduri: "file://foo?format=json" },
+		{ url: "yaml://foo", expectedformat: codec.FormatYaml, expecteduri: "file://foo?format=yaml" },
+		{ url: "file://foo?format=json", expectedformat: codec.FormatJson, expecteduri: "file://foo?format=json" },
+		{ url: "file://foo.jx.json", expectedformat: codec.FormatJson, expecteduri: "file://foo.jx.json" },
+		{ url: "file://foo.jx.json.gz", expectedformat: codec.FormatJson, expecteduri: "file://foo.jx.json.gz" },
+		{ url: "https://foo.jx.json.gz", expectedformat: codec.FormatJson, expecteduri: "https://foo.jx.json.gz" },
+	} {
+		j := NewJxFile()
+		assert.NotNil(t, j)
+		u,_ := url.Parse(v.url)
+		j.SetURI(u)
+		assert.Equal(t, v.expectedformat, j.Format)
+		assert.Equal(t, v.expecteduri, string(j.Uri))
+	}
+}
+
+func TestJxFactory(t *testing.T) {
+	converter, err := folio.DocumentRegistry.ConverterTypes.New("json://-")
+	assert.Nil(t, err)
+	assert.NotNil(t, converter)
+	assert.Equal(t, data.TypeName("jx"), converter.Type())
+	jxfile := converter.(*JxFile)
+	assert.Equal(t, "-", jxfile.Path)
+	assert.Equal(t, codec.FormatJson, jxfile.Format)
+}

internal/fan/package.go

@@ -0,0 +1,76 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+_	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+_	"path/filepath"
+	"decl/internal/data"
+	"decl/internal/resource"
+	"decl/internal/folio"
+_	"os"
+_	"io"
+	"log/slog"
+)
+
+type Package struct {
+	PackageType resource.PackageType `yaml:"type" json:"type"`
+}
+
+func NewPackage() *Package {
+	return &Package{ PackageType: resource.SystemPackageType }
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"package"}, func(u *url.URL) data.Converter {
+		p := NewPackage()
+		packageType := u.Query().Get("type")
+		if len(packageType) > 0 {
+			p.PackageType = resource.PackageType(packageType)
+		}
+		return p
+	})
+
+}
+
+func (p *Package) Type() data.TypeName { return "package" }
+
+func (p *Package) Extract(sourceResource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	slog.Info("fan.Package.Extract()", "package", p) 
+
+	installedPackages := make([]*resource.Package, 0, 100)
+	cmd := p.PackageType.NewReadPackagesCommand()
+	if cmd == nil {
+		return document, fmt.Errorf("%w: %s", resource.ErrUnsupportedPackageType, p.PackageType)
+	}
+
+	var out []byte
+	if out, err = cmd.Execute(p); err == nil {
+		slog.Info("fan.Package.Extract()", "output", out)
+		if err = cmd.Extractor(out, &installedPackages); err == nil {
+			document = folio.DocumentRegistry.NewDocument("file://-")
+			for _, pkg := range installedPackages {
+				if pkg == nil {
+					pkg = resource.NewPackage()
+				}
+				if _, err = document.NewResource(pkg.URI()); err != nil {
+					return
+				}
+			}
+		}
+	}
+	slog.Info("fan.Package.Extract()", "output", out, "error", err)
+	return
+}
+
+func (p *Package) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	return nil, data.ErrUnsupportedConversion
+}
+
+func (p *Package) Close() error {
+	return nil
+}

internal/fan/package_test.go

@@ -0,0 +1,23 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestNewPackageSource(t *testing.T) {
+	s := NewPackage()
+	assert.NotNil(t, s)
+}
+
+func TestExtractPackages(t *testing.T) {
+	p := NewPackage()
+	assert.NotNil(t, p)
+
+	document, err := p.Extract(nil, nil)
+	assert.Nil(t, err)
+	assert.NotNil(t, document)
+	assert.Greater(t, document.Len(), 0)
+}

internal/fan/tar.go

@@ -0,0 +1,212 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+_	"context"
+_	"encoding/json"
+	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+	"decl/internal/transport"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"archive/tar"
+_	"regexp"
+	"io"
+	"io/fs"
+	"log"
+	"log/slog"
+	"path/filepath"
+)
+
+type Tar struct {
+	Uri folio.URI `yaml:"uri" json:"uri"`
+	parsedURI *url.URL `yaml:"-" json:"-"`
+	emitResource data.Resource `yaml:"-" json:"-"`
+	reader io.ReadCloser `yaml:"-" json:"-"`
+	writer io.WriteCloser `yaml:"-" json:"-"`
+	targetArchive *tar.Writer `yaml:"-" json:"-"`
+}
+
+func NewTar() *Tar {
+	return &Tar{}
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"tar"}, func(u *url.URL) data.Converter {
+		t := NewTar()
+		t.SetURI(u)
+		return t
+	})
+
+	folio.DocumentRegistry.ConverterTypes.RegisterContentType([]string{"tar", "tar.gz", "tgz"}, func(u *url.URL) data.Converter {
+		t := NewTar()
+		t.SetURI(u)
+		return t
+	})
+
+}
+
+func (t *Tar) Type() data.TypeName { return "tar" }
+
+func (t *Tar) SetURI(u *url.URL) {
+	slog.Info("Tar.SetURI()", "tar", t)
+	u.Scheme = "file"
+	if u.Path == "" || u.Path == "-" {
+	} else {
+		fileAbsolutePath, _ := filepath.Abs(filepath.Join(u.Hostname(), u.Path))
+		u.Path = fileAbsolutePath
+	}
+	t.Uri.SetURL(u)
+	t.parsedURI = u
+/*
+	exttype, fileext := t.Uri.Extension()
+	if exttype == "tgz" || fileext == "tgz" {
+		q := u.Query()
+		q.Set("gzip", string("true"))
+		u.RawQuery = q.Encode()
+	}
+*/
+}
+
+func (t *Tar) targetResource() (target data.Resource, err error) {
+	if t.emitResource == nil {
+
+		if t.emitResource, err = t.Uri.NewResource(nil); err != nil {
+			return nil, err
+		}
+
+		var tarTargetFile data.FileResource = t.emitResource.(data.FileResource)
+		tarTargetFile.SetContentSourceRef(t.Uri.String())
+		tarTargetFile.SetGzipContent(true)
+
+		t.writer, err = tarTargetFile.(data.ContentReadWriter).ContentWriterStream()
+		if err == io.EOF {
+			slog.Info("Tar.targetResource() ContentWriterStream", "target", tarTargetFile, "tar", t.writer.(*transport.Writer), "error", err)
+			panic(err)
+		}
+		t.targetArchive = tar.NewWriter(t.writer)
+		slog.Info("Tar.targetResource() SetContentSourceRef", "target", tarTargetFile, "uri", t.Uri.String(), "tar", t.targetArchive, "error", err)
+
+	}
+	target = t.emitResource
+	return 
+}
+
+// Convert a document of file resources to a tar file resource
+func (t *Tar) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+
+	resourceTarget, err = t.targetResource()
+	
+	slog.Info("Tar.Emit()", "writer", t.writer.(*transport.Writer), "error", err)
+
+	for _,res := range document.Filter(func(d data.Declaration) bool {
+		return d.ResourceType() == "file"
+	}) {
+
+		var f data.FileResource = res.(*folio.Declaration).Attributes.(data.FileResource)
+
+		//f.PathNormalization(true)
+		//err = f.NormalizePath()
+
+		fileInfo := f.FileInfo()
+		slog.Info("Tar.Emit() FileInfo", "fileinfo", fileInfo, "size", fileInfo.Size(), "file", f)
+		if fileInfo.Size() < 1 {
+			if len(f.GetContentSourceRef()) > 0 {
+				rs, _ := f.(data.ContentReader).ContentReaderStream()
+				info, _ := rs.Stat()
+				err = f.SetFileInfo(info)
+				slog.Info("Tar.Emit() Set FileInfo from ContentSourceRef", "fileinfo", f.FileInfo(), "file", f)
+				rs.Close()
+			} else {
+				if err = f.(data.Info).ReadStat(); err != nil {
+					return
+				}
+			}
+		}
+
+		slog.Info("Tar.Emit", "file", f, "size", fileInfo.Size(),  "error", err)
+		hdr, fiErr := tar.FileInfoHeader(fileInfo, "")
+
+		if fileInfo.Mode() & fs.ModeSymlink != 0 {
+			hdr.Linkname = f.GetTarget()
+		}
+
+		slog.Info("Tar.Emit", "header", hdr, "size", fileInfo.Size(), "err", fiErr)
+		if err := t.targetArchive.WriteHeader(hdr); err != nil {
+			slog.Error("Tar.Emit() WriteHeader", "target", t.targetArchive, "header", hdr, "resource", f, "fileinfo", fileInfo, "error", err)
+			log.Fatal(err)
+		}
+
+		if fileInfo.IsDir() {
+			continue
+		}
+
+		slog.Info("Tar.Emit - writing resource to target archive", "target", t.targetArchive, "resource", f, "err", err)
+		if _, err := f.GetContent(t.targetArchive); err != nil {
+			slog.Error("Tar.Emit() Content", "target", t.targetArchive, "resource", f, "fileinfo", fileInfo, "error", err)
+			log.Fatal(err)
+		}
+		slog.Info("Tar.Emit - wrote", "resource", f, "err", err)
+	}
+	
+	return
+}
+
+// Convert a tar file resource to a document of file resources
+func (t *Tar) Extract(resourceSource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	document = folio.DocumentRegistry.NewDocument("")
+	var tarSourceFile data.FileResource = resourceSource.(data.FileResource)
+	//tarSourceFile := resourceSource.(*resource.File)
+
+	tarSourceFile.SetGzipContent(true)
+	t.reader, err = tarSourceFile.GetContent(nil)
+	sourceArchive := tar.NewReader(t.reader)
+
+	defer t.reader.Close()
+
+	for {
+		var hdr *tar.Header
+		hdr, err = sourceArchive.Next()
+		if err == io.EOF {
+			slog.Info("Tar.Extract() EOF", "source", sourceArchive)
+			err = nil
+			break
+		}
+		if err != nil {
+			slog.Info("Tar.Extract() ERROR", "source", sourceArchive, "error", err)
+			return
+		}
+
+		var fileResource data.Resource
+		uri := fmt.Sprintf("file://%s", hdr.Name)
+		if fileResource, err = document.(*folio.Document).NewResource(uri); err != nil {
+			return
+		}
+		var f data.FileResource = fileResource.(data.FileResource)
+
+		if err = f.SetFileInfo(hdr.FileInfo()); err != nil {
+			return
+		}
+		err = f.SetContent(sourceArchive)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (t *Tar) Close() (err error) {
+	if t.reader != nil {
+		if err = t.reader.Close(); err != nil {
+			return
+		}
+	}
+	if err = t.targetArchive.Close(); err == nil {
+		if t.writer != nil {
+			err = t.writer.Close()
+		}
+	}
+	return
+}

internal/fan/tar_test.go

@@ -0,0 +1,105 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"bytes"
+	"archive/tar"
+	"decl/internal/data"
+	"decl/internal/folio"
+	"decl/internal/resource"
+	"path/filepath"
+	"strings"
+	"io"
+	"fmt"
+	"log/slog"
+)
+
+var tarArchiveBuffer bytes.Buffer
+
+func TarArchive() (err error) {
+	tw := tar.NewWriter(&tarArchiveBuffer)
+	defer tw.Close()
+
+	fileContent := "test file content"
+
+	if err = tw.WriteHeader(&tar.Header{
+		Name: "testfile",
+		Mode: 0600,
+		Size: int64(len(fileContent)),
+	}); err == nil {
+		_, err = tw.Write([]byte(fileContent))
+	}
+	return
+}
+
+func TestNewTar(t *testing.T) {
+	a := NewTar()
+	assert.NotNil(t, a)
+}
+
+func TestExtractFiles(t *testing.T) {
+	a := NewTar()
+	assert.NotNil(t, a)
+	e := TarArchive()
+	assert.Nil(t, e)
+	assert.Greater(t, tarArchiveBuffer.Len(), 0)
+
+	d := folio.NewDeclaration()
+	d.ResourceTypes = folio.DocumentRegistry.ResourceTypes
+	slog.Info("TestExtractFiles", "resourcetypes", folio.DocumentRegistry.ResourceTypes, "declarationtypes", d.ResourceTypes, "resource.ResourceTypes", resource.ResourceTypes)
+	d.Type = "file"
+	assert.Nil(t, d.NewResource(nil))
+
+	var sourceResource data.FileResource = d.Attributes.(data.FileResource)
+	assert.Nil(t, sourceResource.SetContent(&tarArchiveBuffer))
+
+	exDoc, err := a.Extract(d.Attributes, nil)
+	assert.Nil(t, err)
+	assert.NotNil(t, exDoc)
+	document := exDoc.(*folio.Document)
+	assert.Greater(t, document.Len(), 0)
+
+	assert.Equal(t, folio.TypeName("file"), document.ResourceDeclarations[0].Type)
+	f := document.ResourceDeclarations[0].Resource().(data.FileResource)
+	assert.Equal(t, "testfile", f.FilePath())
+}
+
+func TestEmitFiles(t *testing.T) {
+	expected := "some test data"
+
+	a := NewTar()
+	assert.NotNil(t, a)
+
+	a.Uri = folio.URI(fmt.Sprintf("file://%s", filepath.Join(TempDir, "testemitfiles.tar")))
+
+	doc := folio.DocumentRegistry.NewDocument("")
+
+	uri := fmt.Sprintf("file://%s", filepath.Join(TempDir, "foo.txt"))
+	res, resErr := doc.NewResource(uri)
+	assert.Nil(t, resErr)
+	assert.NotNil(t, res)
+
+	assert.Equal(t, res, doc.GetResource(uri).Resource())
+	f := doc.GetResource(uri).Attributes.(data.FileResource)
+
+	assert.Nil(t, f.SetContent(strings.NewReader(expected)))
+	
+	target, emitErr := a.Emit(doc, nil)
+	assert.Nil(t, emitErr)
+	assert.Equal(t, folio.URI(fmt.Sprintf("file://%s", target.(data.FileResource).FilePath())), a.Uri)
+
+	tarArchiveBuffer.Reset()
+	_, contentErr := target.(data.FileResource).GetContent(&tarArchiveBuffer)
+	assert.Nil(t, contentErr)
+	tr := tar.NewReader(&tarArchiveBuffer)
+	hdr, err := tr.Next()
+	assert.NotEqual(t, io.EOF, err)
+	assert.NotNil(t, hdr)
+	assert.Equal(t, f.FilePath(), hdr.Name)
+	data, err := io.ReadAll(tr)
+	assert.Nil(t, err)
+	assert.Equal(t, expected, string(data))
+}

internal/fan/user.go

@@ -0,0 +1,75 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package fan
+
+import (
+_	"context"
+_	"encoding/json"
+_	"fmt"
+_	"gopkg.in/yaml.v3"
+	"net/url"
+_	"path/filepath"
+	"decl/internal/resource"
+	"decl/internal/data"
+	"decl/internal/folio"
+_	"os"
+_	"io"
+	"log/slog"
+)
+
+type User struct {
+	UserType resource.UserType `yaml:"type" json:"type"`
+}
+
+func NewUser() *User {
+	return &User{ UserType: resource.SystemUserType }
+}
+
+func init() {
+	folio.DocumentRegistry.ConverterTypes.Register([]string{"user"}, func(u *url.URL) data.Converter {
+		userSource := NewUser()
+		userType := u.Query().Get("type")
+		if len(userType) > 0 {
+			userSource.UserType = resource.UserType(userType)
+		}
+		return userSource
+	})
+
+}
+
+func (u *User) Type() data.TypeName { return "user" }
+
+func (u *User) Extract(sourceResource data.Resource, filter data.ElementSelector) (document data.Document, err error) {
+	slog.Info("user source Extract()", "user", u) 
+	Users := make([]*resource.User, 0, 100)
+	cmd := u.UserType.NewReadUsersCommand()
+	if cmd == nil {
+		return document, resource.ErrUnsupportedUserType
+	}
+	if out, err := cmd.Execute(u); err == nil {
+		slog.Info("user source ExtractResources()", "output", out)
+		if exErr := cmd.Extractor(out, &Users); exErr != nil {
+			return document, exErr
+		}
+		document = folio.DocumentRegistry.NewDocument("user://-")
+		for _, usr := range Users {
+			if usr == nil {
+				usr = resource.NewUser()
+			}
+			usr.UserType = u.UserType
+			document.AddResourceDeclaration("user", usr)
+		}
+	} else {
+		slog.Info("user source Extract()", "output", out, "error", err)
+		return document, err
+	}
+	return document, nil
+}
+
+func (u *User) Emit(document data.Document, filter data.ElementSelector) (resourceTarget data.Resource, err error) {
+	return nil, data.ErrUnsupportedConversion
+}
+
+func (u *User) Close() error {
+	return nil
+}

internal/fan/user_test.go

@@ -1,23 +1,23 @@
 // Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
 
-package source
+package fan
 
 import (
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
 
-func TestNewDirSource(t *testing.T) {
+func TestNewUserSource(t *testing.T) {
-	s := NewDir()
+	s := NewUser()
 	assert.NotNil(t, s)
 }
 
-func TestExtractDirectory(t *testing.T) {
+func TestExtractUsers(t *testing.T) {
-	s := NewDir()
+	u := NewUser()
-	assert.NotNil(t, s)
+	assert.NotNil(t, u)
 
-	document, err := s.ExtractDirectory(TempDir)
+	document, err := u.Extract(nil, nil)
 	assert.Nil(t, err)
 	assert.NotNil(t, document)
-
+	assert.Greater(t, document.Len(), 0)
 }

internal/folio/block.go

@@ -0,0 +1,244 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package folio
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/url"
+	"strings"
+	"gopkg.in/yaml.v3"
+	"decl/internal/codec"
+	"decl/internal/data"
+	"decl/internal/schema"
+)
+
+type ConfigKey string
+
+// Lookup a config value using block.key identifier (E.g. system.GOOS)
+func (c ConfigKey) GetValue() (value any, err error) {
+	fields := strings.SplitN(string(c), ".", 2)
+	if configBlock, ok := DocumentRegistry.ConfigNameMap.Get(fields[0]); ok && len(fields) > 1 {
+		return configBlock.GetValue(fields[1])
+	} else {
+		return nil, fmt.Errorf("%w - %s", data.ErrUnknownConfigurationType, c)
+	}
+}
+
+func (c ConfigKey) Get() any {
+	if v, err := c.GetValue(); err == nil {
+		return v
+	}
+	return nil
+}
+
+func (c ConfigKey) GetStringSlice() []string {
+	if v, err := c.GetValue(); err == nil {
+		return v.([]string)
+	}
+	return nil
+}
+
+type BlockType struct {
+	Name string `json:"name" yaml:"name"`
+	Type TypeName `json:"type" yaml:"type"`
+}
+
+type Block struct {
+	Name string `json:"name" yaml:"name"`
+	Type TypeName `json:"type" yaml:"type"`
+	Values data.Configuration `json:"values" yaml:"values"`
+	ConfigurationTypes data.TypesRegistry[data.Configuration] `json:"-" yaml:"-"`
+}
+
+func NewBlock() *Block {
+	return &Block{ Type: "generic", ConfigurationTypes: DocumentRegistry.ConfigurationTypes }
+}
+
+func (b *Block) Clone() data.Block {
+	return &Block {
+		Type: b.Type,
+		Values: b.Values.Clone(),
+	}
+}
+
+func (b *Block) Load(docData []byte, f codec.Format) (err error) {
+	err = f.StringDecoder(string(docData)).Decode(b)
+	return
+}
+
+func (b *Block) LoadReader(r io.ReadCloser, f codec.Format) (err error) {
+	err = f.Decoder(r).Decode(b)
+	return
+}
+
+func (b *Block) LoadString(docData string, f codec.Format) (err error) {
+	err = f.StringDecoder(docData).Decode(b)
+	return
+}
+
+func (b *Block) LoadBlock(yamlBlock string) (err error) {
+	return b.LoadString(yamlBlock, codec.FormatYaml)
+}
+
+func (b *Block) JSON() ([]byte, error) {
+	var buf strings.Builder
+	err := codec.FormatJson.Serialize(b, &buf)
+	return []byte(buf.String()), err
+}
+
+func (b *Block) YAML() ([]byte, error) {
+	var buf strings.Builder
+	err := codec.FormatYaml.Serialize(b, &buf)
+	return []byte(buf.String()), err
+}
+
+func (b *Block) PB() ([]byte, error) {
+	var buf strings.Builder
+	err := codec.FormatProtoBuf.Serialize(b, &buf)
+	return []byte(buf.String()), err
+}
+
+func (b *Block) Validate() (err error) {
+	var blockJson []byte
+	if blockJson, err = b.JSON(); err == nil {
+		s := schema.New(fmt.Sprintf("%s-block", b.Type), schemaFiles) // XXX wrong schemaFiles
+		err = s.Validate(string(blockJson))
+	}
+	return
+}
+
+func (b *Block) NewConfiguration(uri *string) (err error) {
+	if b.ConfigurationTypes == nil {
+		panic(fmt.Errorf("Undefined type registry: unable to create new configuration %s", *uri))
+	}
+	if uri == nil {
+		b.Values, err = b.ConfigurationTypes.New(fmt.Sprintf("%s://", b.Type))
+	} else {
+		b.Values, err = b.ConfigurationTypes.New(*uri)
+	}
+	return
+}
+
+func (b *Block) NewConfigurationFromParsedURI(uri *url.URL) (err error) {
+	if uri == nil {
+		b.Values, err = b.ConfigurationTypes.New(fmt.Sprintf("%s://", b.Type))
+	} else {
+		b.Values, err = b.ConfigurationTypes.NewFromParsedURI(uri)
+	}
+	return
+}
+
+func (b *Block) GetValue(key string) (any, error) {
+	return b.Values.GetValue(key)
+}
+
+func (b *Block) Configuration() data.Configuration {
+	return b.Values
+}
+
+func (b *Block) ConfigurationType() data.TypeName {
+	return data.TypeName(b.Type)
+}
+
+func (b *Block) URI() string {
+	return b.Values.URI()
+}
+
+func (b *Block) SetURI(uri string) (err error) {
+	if b.Values == nil {
+		if err = b.NewConfiguration(&uri); err != nil {
+			return
+		}
+	}
+	if b.Values == nil {
+		return fmt.Errorf("%w - %s", data.ErrUnknownConfigurationType, uri)
+	}
+	b.Type = TypeName(b.Values.Type())
+	_,err = b.Values.Read(context.Background())
+	return
+}
+
+func (b *Block) SetParsedURI(uri data.URIParser) (err error) {
+	if b.Values == nil {
+		if err = b.NewConfigurationFromParsedURI(uri.URL()); err != nil {
+			return
+		}
+	}
+	if b.Values == nil {
+		return fmt.Errorf("%w - %s", data.ErrUnknownConfigurationType, uri)
+	}
+	b.Type = TypeName(b.Values.Type())
+	_,err = b.Values.Read(context.Background())
+	return
+}
+
+func (b *Block) UnmarshalValue(value *BlockType) error {
+	if b.ConfigurationTypes == nil {
+		panic(fmt.Errorf("Undefined type registry: unable to create new configuration %s", value.Type))
+	}
+	b.Name = value.Name
+	if value.Type == "" {
+		b.Type = "generic"
+	} else {
+		b.Type = value.Type
+	}
+
+	newConfig, configErr := b.ConfigurationTypes.New(fmt.Sprintf("%s://", b.Type))
+	if configErr != nil {
+		return configErr
+	}
+	b.Values = newConfig
+	return nil
+}
+
+func (b *Block) UnmarshalYAML(value *yaml.Node) error {
+	if b.ConfigurationTypes == nil {
+		b.ConfigurationTypes = DocumentRegistry.ConfigurationTypes
+	}
+	t := &BlockType{}
+	if unmarshalConfigurationTypeErr := value.Decode(t); unmarshalConfigurationTypeErr != nil {
+		return unmarshalConfigurationTypeErr
+	}
+
+	if err := b.UnmarshalValue(t); err != nil {
+		return err
+	}
+
+	configurationVals := struct {
+		Values yaml.Node `json:"values"`
+	}{}
+	if unmarshalValuesErr := value.Decode(&configurationVals); unmarshalValuesErr != nil {
+		return unmarshalValuesErr
+	}
+	if unmarshalConfigurationErr := configurationVals.Values.Decode(b.Values); unmarshalConfigurationErr != nil {
+		return unmarshalConfigurationErr
+	}
+	_, readErr := b.Values.Read(context.Background())
+	return readErr
+}
+
+func (b *Block) UnmarshalJSON(jsonData []byte) error {
+	if b.ConfigurationTypes == nil {
+		b.ConfigurationTypes = DocumentRegistry.ConfigurationTypes
+	}
+	t := &BlockType{}
+	if unmarshalConfigurationTypeErr := json.Unmarshal(jsonData, t); unmarshalConfigurationTypeErr != nil {
+		return unmarshalConfigurationTypeErr
+	}
+
+	if err := b.UnmarshalValue(t); err != nil {
+		return err
+	}
+
+	configurationVals := struct {
+		Values data.Configuration `json:"values"`
+	}{Values: b.Values}
+	if unmarshalValuesErr := json.Unmarshal(jsonData, &configurationVals); unmarshalValuesErr != nil {
+		return unmarshalValuesErr
+	}
+	_, readErr := b.Values.Read(context.Background())
+	return readErr
+}

internal/folio/block_test.go

@@ -0,0 +1,43 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package folio
+
+import (
+_ "fmt"
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"strings"
+	"decl/internal/data"
+	"decl/internal/codec"
+	"io"
+	"log/slog"
+)
+
+func TestNewBlock(t *testing.T) {
+	configYaml := `
+name: "foo"
+values:
+  http_user: "test"
+  http_pass: "password"
+`
+	docReader := strings.NewReader(configYaml)
+
+	block := NewBlock()
+	block.ConfigurationTypes = TestConfigurationTypes
+	slog.Info("TestNewBlock()", "block", block, "types", block.ConfigurationTypes)
+
+	assert.NotNil(t, block)
+	assert.Nil(t, block.LoadReader(io.NopCloser(docReader), codec.FormatYaml))
+
+	assert.Equal(t, "foo", block.Name)
+
+	block.Values.(*MockQuuz).InjectGetValue = func(key string) (any, error) { return "test", nil }
+	val, err := block.GetValue("http_user")
+	assert.Nil(t, err)
+	assert.Equal(t, "test", val)
+
+	block.Values.(*MockQuuz).InjectGetValue = func(key string) (any, error) { return nil, data.ErrUnknownConfigurationKey }
+	missingVal, missingErr := block.GetValue("content")
+	assert.ErrorIs(t, missingErr, data.ErrUnknownConfigurationKey)
+	assert.Nil(t, missingVal)
+}

internal/folio/constraint.go

@@ -0,0 +1,83 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package folio
+
+import (
+	"decl/internal/data"
+	"errors"
+	"log/slog"
+)
+
+// Dependencies describe a requirement on a given system property
+
+// system properties:
+//   loaded from config
+//   
+// deps assigned to decl
+// match values in document configurations
+// match values in all configurations?
+//
+// documents/facter.jx.yaml -> facts -> Get(key)
+//
+// ConfigMapper? -> DocumentRegistry
+
+// system:
+//   arch: amd64
+//   foo: bar
+
+var (
+	ErrConstraintFailure = errors.New("Constraint failure")
+)
+
+type Constraint map[string]any
+
+//func Compare[aV, bV map[K]V, K, V comparable](a aV, b bV) (matched bool) {
+func CompareMap(a, b any) (matched bool) {
+	for k,v := range a.(Constraint) {
+		if bv, exists := b.(map[string]any)[k]; exists && bv == v {
+			matched = true
+		} else {
+			matched = false
+		}
+	}
+	return
+}
+
+func (c Constraint) CompareValues(a, b any) (matched bool) {
+	matched = true
+	slog.Info("Constraint.CompareValues()", "a", a, "b", b)
+	switch btype := b.(type) {
+	case map[string]string:
+		return CompareMap(a, b)
+	case map[string]any:
+		return CompareMap(a, b)
+	case []string:
+		acmp := a.([]string)
+		if len(acmp) > len(btype) {
+			return false
+		}
+		for i,v := range acmp {
+			if v != btype[i] {
+				return false
+			}
+		}
+	default:
+		return a == b
+	}
+	return
+}
+
+func (c Constraint) Check(configs data.ConfigurationValueGetter) (matched bool) {
+	matched = true
+	for k,v := range c {
+		slog.Info("Constraint.Check()", "constraint", c, "config", configs)
+		
+		if configValue, err := configs.GetValue(k); err != nil || ! c.CompareValues(v, configValue) {
+			slog.Info("Constraint.Check() - FAILURE", "configvalue", configValue, "constraint", v, "error", err)
+			matched = false
+		}
+	}
+	return
+}
+
+

internal/folio/declaration.go

@@ -0,0 +1,432 @@
+// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
+
+package folio
+
+import (
+_	"errors"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"gopkg.in/yaml.v3"
+	"log/slog"
+_	"gitea.rosskeen.house/rosskeen.house/machine"
+	"gitea.rosskeen.house/pylon/luaruntime"
+	"decl/internal/codec"
+	"decl/internal/data"
+	"decl/internal/schema"
+	"errors"
+)
+
+var (
+	ErrUnknownStateTransition error = errors.New("Unknown state transition")
+)
+
+type ConfigName string
+
+type DeclarationType struct {
+	Type TypeName `json:"type" yaml:"type"`
+	Transition string `json:"transition,omitempty" yaml:"transition,omitempty"`
+	Config ConfigName `json:"config,omitempty" yaml:"config,omitempty"`
+	OnError OnError   `json:"onerror,omitempty" yaml:"onerror,omitempty"`
+	Error   string    `json:"error,omitempty" yaml:"error,omitempty"`
+	Requires Dependencies `json:"requires,omitempty" yaml:"requires,omitempty"`
+	On *Events `json:"on,omitempty" yaml:"on,omitempty"`
+}
+
+type Declaration struct {
+	Type TypeName `json:"type" yaml:"type"`
+	Transition string `json:"transition,omitempty" yaml:"transition,omitempty"`
+	Attributes data.Resource `json:"attributes" yaml:"attributes"`
+	Config ConfigName `json:"config,omitempty" yaml:"config,omitempty"`
+	OnError OnError   `json:"onerror,omitempty" yaml:"onerror,omitempty"`
+	Error   string    `json:"error,omitempty" yaml:"error,omitempty"`
+	Requires Dependencies `json:"requires,omitempty" yaml:"requires,omitempty"`
+	On *Events `json:"on,omitempty" yaml:"on,omitempty"`
+	runtime luaruntime.LuaRunner
+	document *Document
+	configBlock data.Block
+	ResourceTypes data.TypesRegistry[data.Resource] `json:"-" yaml:"-"`
+}
+
+func NewDeclaration() *Declaration {
+	return &Declaration{ ResourceTypes: DocumentRegistry.ResourceTypes, runtime: luaruntime.New() }
+}
+
+func NewDeclarationFromDocument(document *Document) *Declaration {
+	return &Declaration{ document: document, ResourceTypes: document.Types() }
+}
+
+func (n *ConfigName) Exists() bool {
+	return DocumentRegistry.ConfigNameMap.Has(string(*n))
+}
+
+func (n *ConfigName) GetBlock() *Block {
+	if v, ok := DocumentRegistry.ConfigNameMap.Get(string(*n)); ok {
+		return v
+	}
+	return nil
+}
+
+func (d *Declaration) SetDocument(newDocument *Document) {
+	slog.Info("Declaration.SetDocument()", "declaration", d)
+	d.document = newDocument
+	d.SetConfig(d.document.config)
+	d.ResourceTypes = d.document.Types()
+	d.Attributes.SetResourceMapper(d.document.uris)
+}
+
+func (d *Declaration) ResolveId(ctx context.Context) string {
+	defer func() {
+		if r := recover(); r != nil {
+			slog.Info("Declaration.ResolveId() - panic", "recover", r, "state", d.Attributes.StateMachine())
+			if triggerErr := d.Attributes.StateMachine().Trigger("notexists"); triggerErr != nil {
+				panic(triggerErr)
+			}
+		}
+	}()
+	slog.Info("Declaration.ResolveId()")
+	id := d.Attributes.ResolveId(ctx)
+	return id
+}
+
+func (d *Declaration) Clone() data.Declaration {
+	return &Declaration {
+		Type: d.Type,
+		Transition: d.Transition,
+		Attributes: d.Attributes.Clone(),
+		//runtime: luaruntime.New(),
+		Config: d.Config,
+		Requires: d.Requires,
+		On: d.On,
+	}
+}
+
+func (d *Declaration) Load(docData []byte, f codec.Format) (err error) {
+	err = f.StringDecoder(string(docData)).Decode(d)
+	return
+}
+
+func (d *Declaration) LoadReader(r io.ReadCloser, f codec.Format) (err error) {
+	err = f.Decoder(r).Decode(d)
+	return
+}
+
+func (d *Declaration) LoadString(docData string, f codec.Format) (err error) {
+	err = f.StringDecoder(docData).Decode(d)
+	return
+}
+
+func (d *Declaration) ResourceType() data.TypeName {
+	return data.TypeName(d.Type)
+}
+
+func (d *Declaration) URI() string {
+	return d.Attributes.URI()
+}
+
+func (d *Declaration) JSON() ([]byte, error) {
+	return json.Marshal(d)
+}
+
+func (d *Declaration) Validate() (err error) {
+	var declarationJson []byte
+	if declarationJson, err = d.JSON(); err == nil {
+		s := schema.New(fmt.Sprintf("%s-declaration", d.Type), schemaFiles)
+		err = s.Validate(string(declarationJson))
+	}
+	return err
+}
+
+func (d *Declaration) NewResourceFromParsedURI(u data.URIParser) (err error) {
+	if u == nil {
+		d.Attributes, err = d.ResourceTypes.NewFromType(string(d.Type))
+	} else {
+		parsed := u.URL()
+		if d.Attributes, err = d.ResourceTypes.NewFromParsedURI(parsed); err == nil {
+			err = d.Attributes.SetParsedURI(u)
+		}
+	}
+	return
+}
+
+func (d *Declaration) NewResource(uri *string) (err error) {
+	slog.Info("Declaration.NewResource()")
+	if d.ResourceTypes == nil {
+		panic(fmt.Errorf("Undefined type registry: unable to create new resource %s", *uri))
+	}
+
+	if uri == nil {
+		d.Attributes, err = d.ResourceTypes.NewFromType(string(d.Type))
+	} else {
+		slog.Info("Declaration.NewResource()", "uri", *uri)
+		parsedURI := URI(*uri).Parse()
+		d.Attributes, err = d.ResourceTypes.NewFromParsedURI(parsedURI.URL())
+	}
+	return
+}
+
+func (d *Declaration) Resource() data.Resource {
+	return d.Attributes
+}
+
+func (d *Declaration) Apply(stateTransition string) (result error) {
+	defer func() {
+		if r := recover(); r != nil {
+			slog.Info("Declaration.Apply()", "error", r, "resourceerror", d.Error)
+			if d.Error != "" {
+				result = fmt.Errorf("%s - %s", r, d.Error)
+			} else {
+				result = fmt.Errorf("%s", r)
+			}
+		}
+		if result != nil {
+			d.Error = result.Error()
+		}
+	}()
+
+	if stateTransition == "" {
+		stateTransition = d.Transition
+	}
+
+	stater := d.Attributes.StateMachine()
+	slog.Info("Declaration.Apply()", "stateTransition", stateTransition, "machine", stater, "machine.state", stater.CurrentState(), "uri", d.Attributes.URI())
+	switch stateTransition {
+	case "construct":
+		if doc, ok := DocumentRegistry.DeclarationMap[d]; ok {
+			d.SetDocument(doc)
+		}
+	case "stat":
+		result = stater.Trigger("stat")
+	case "read":
+		result = stater.Trigger("read")
+	case "delete", "absent":
+		if stater.CurrentState() == "present" {
+			result = stater.Trigger("delete")
+		}
+	case "update":
+		if result = stater.Trigger("update"); result != nil {
+			return result
+		}
+		result = stater.Trigger("read")
+	default:
+		return fmt.Errorf("%w: %s on %s", ErrUnknownStateTransition, stateTransition, d.Attributes.URI())
+	case "create", "present":
+		if stater.CurrentState() == "absent" || stater.CurrentState() == "unknown" {
+			if result = stater.Trigger("create"); result != nil {
+				slog.Info("Declaration.Apply()", "trigger", "create", "state", stater.CurrentState(), "error", result, "declaration", d)
+				return result
+			}
+		}
+
+		result = stater.Trigger("read")
+		currentState := stater.CurrentState()
+		switch currentState {
+		case "create", "present":
+		default:
+			return fmt.Errorf("Failed to create resource: %s - state: %s, err: %s", d.URI(), currentState, d.Error)
+		}
+	}
+	return result
+}
+
+func (d *Declaration) SetConfig(configDoc data.Document) {
+	slog.Info("Declaration.SetConfig()", "config", configDoc)
+	if configDoc != nil {
+		if configDoc.Has(string(d.Config)) {
+			if v, ok := configDoc.Get(string(d.Config)); ok {
+				d.configBlock = v.(data.Block)
+				d.Attributes.UseConfig(d.configBlock)
+				return
+			}
+		}
+	}
+
+	if v, ok := DocumentRegistry.ConfigNameMap.Get(string(d.Config)); ok {
+		d.configBlock = v
+		d.Attributes.UseConfig(d.configBlock)
+		return
+	}
+	if d.Config != "" { // XXX
+		panic(fmt.Sprintf("failed setting config: %s", d.Config))
+	}
+}
+
+func (d *Declaration) SetURI(uri string) (err error) {
+	slog.Info("Declaration.SetURI()", "uri", uri, "declaration", d)
+	if d.Attributes == nil {
+		err = d.NewResource(&uri)
+	} else {
+		err = d.Attributes.SetParsedURI(URI(uri).Parse())
+	}
+	if err != nil {
+		return err
+	}
+	if d.Attributes == nil {
+		return fmt.Errorf("%w: %s", ErrUnknownResourceType, uri)
+	}
+	d.Type = TypeName(d.Attributes.Type())
+	_, err = d.Attributes.Read(context.Background()) // fix context
+	slog.Info("Declaration.SetURI() - read", "error", err)
+	return
+}
+
+func (d *Declaration) SetParsedURI(uri data.URIParser) (err error) {
+	slog.Info("Declaration.SetParsedURI()", "uri", uri, "declaration", d)
+	if d.Attributes == nil {
+		err = d.NewResourceFromParsedURI(uri)
+	} else {
+		err = d.Attributes.SetParsedURI(uri)
+	}
+	if err != nil {
+		return err
+	}
+	if d.Attributes == nil {
+		return fmt.Errorf("%w: %s", ErrUnknownResourceType, uri)
+	}
+	d.Type = TypeName(d.Attributes.Type())
+	_, err = d.Attributes.Read(context.Background()) // fix context
+	slog.Info("Declaration.SetURI() - read", "error", err)
+	return
+}
+
+func (d *Declaration) UnmarshalValue(value *DeclarationType) error {
+	slog.Info("Declaration.UnmarshalValue", "declaration", d, "value", value, "addr", d)
+	if d.ResourceTypes == nil {
+		panic(fmt.Errorf("Undefined type registry: unable to create new resource %s", value.Type))
+	}
+	d.Type = value.Type
+	d.Transition = value.Transition
+	d.Config = value.Config
+	d.OnError = value.OnError
+	d.Error = value.Error
+	d.Requires = value.Requires
+	d.On = value.On
+	newResource, resourceErr := d.ResourceTypes.NewFromType(string(value.Type))
+
+	slog.Info("Declaration.UnmarshalValue", "value", value, "error", resourceErr, "type", value.Type, "resource", newResource, "resourcetypes", d.ResourceTypes)
+	if resourceErr != nil {
+		slog.Info("Declaration.UnmarshalValue", "value", value, "error", resourceErr)
+		return resourceErr
+	}
+	d.Attributes = newResource
+	d.configBlock = d.Config.GetBlock()
+
+	if d.On != nil {
+		if handler, ok := (*d.On)[EventTypeLoad]; ok {
+			stackSize := d.runtime.Api().GetTop()
+			if e := d.runtime.LoadScriptFromString(string(handler)); e != nil {
+				d.Error = e.Error()
+			}
+			returnsCount := d.runtime.Api().GetTop() - stackSize
+			if ! d.runtime.Api().IsNil(-1) {
+		 		if returnsCount == 0 {
+					// return nil
+				} else {
+					if lr,le := d.runtime.CopyReturnValuesFromCall(int(returnsCount)); le == nil {
+						slog.Info("Event.Load", "result", lr, "error", le)
+					}
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
+func (d *Declaration) UnmarshalYAML(value *yaml.Node) (err error) {
+	if d.ResourceTypes == nil {
+		d.ResourceTypes = DocumentRegistry.ResourceTypes
+	}
+	t := &DeclarationType{}
+	if unmarshalResourceTypeErr := value.Decode(t); unmarshalResourceTypeErr != nil {
+		return unmarshalResourceTypeErr
+	}
+
+	if err := d.UnmarshalValue(t); err != nil {
+		return err
+	}
+
+	resourceAttrs := struct {
+		Attributes yaml.Node `json:"attributes"`
+	}{}
+	if unmarshalAttributesErr := value.Decode(&resourceAttrs); unmarshalAttributesErr != nil {
+		return unmarshalAttributesErr
+	}
+	if unmarshalResourceErr := resourceAttrs.Attributes.Decode(d.Attributes); unmarshalResourceErr != nil {
+		return unmarshalResourceErr
+	}
+
+	if i, ok := d.Attributes.(data.ResourceInitializer); ok {
+		err = i.Init(nil)
+	} else {
+		err = fmt.Errorf("failed to execute init")
+	}
+
+	return
+}
+
+func (d *Declaration) UnmarshalJSON(jsonData []byte) (err error) {
+	if d.ResourceTypes == nil {
+		d.ResourceTypes = DocumentRegistry.ResourceTypes
+	}
+	t := &DeclarationType{}
+	if unmarshalResourceTypeErr := json.Unmarshal(jsonData, t); unmarshalResourceTypeErr != nil {
+		return unmarshalResourceTypeErr
+	}
+
+	if err := d.UnmarshalValue(t); err != nil {
+		return err
+	}
+
+	resourceAttrs := struct {
+		Attributes data.Resource `json:"attributes"`
+	}{Attributes: d.Attributes}
+	if unmarshalAttributesErr := json.Unmarshal(jsonData, &resourceAttrs); unmarshalAttributesErr != nil {
+		return unmarshalAttributesErr
+	}
+
+	if i, ok := d.Attributes.(data.ResourceInitializer); ok {
+		err = i.Init(nil)
+	} else {
+		err = fmt.Errorf("failed to execute init")
+	}
+
+	return
+}
+
+/*
+func (l *LuaWorker) Receive(m message.Envelope) {
+  s := m.Sender()
+  switch b := m.Body().(type) {
+  case *message.Error:
+  //  case *worker.Terminated:
+  case *CodeExecute:
+    stackSize := l.runtime.Api().GetTop()
+    if e := l.runtime.LoadScriptFromString(b.Code); e != nil {
+      s.Send(message.New(&message.Error{ E: e }, l))
+    }
+    returnsCount := l.runtime.Api().GetTop() - stackSize
+    if len(b.Entrypoint) == 0 {
+      if ! l.runtime.Api().IsNil(-1) {
+        if returnsCount == 0 {
+            s.Send(message.New(&CodeResult{ Result: []interface{}{ 0 } }, l))
+        } else {
+          lr,le := l.runtime.CopyReturnValuesFromCall(int(returnsCount))
+          if le != nil {
+            s.Send(message.New(&message.Error{ E: le }, l))
+          } else {
+            s.Send(message.New(&CodeResult{ Result: lr }, l))
+          }
+        }
+      }
+    } else {
+      r,ce := l.runtime.CallFunction(b.Entrypoint, b.Args)
+      if ce != nil {
+        s.Send(message.New(&message.Error{ E: ce }, l))
+      }
+      s.Send(message.New(&CodeResult{ Result: r }, l))
+    }
+  }
+}
+*/