fix issue: continue loading docs even if one has an error

internal/builtin/builtin.go

@@ -50,7 +50,7 @@ func Load(uri folio.URI) (documents []data.Document, err error) {
 
 func BuiltInDocuments() (documents []data.Document, err error) {
 
-	docFs := fs.NewWalkDir(documentFiles, "", func(fsys fs.FS, path string, file fs.DirEntry) (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)
 
@@ -64,6 +64,6 @@ func BuiltInDocuments() (documents []data.Document, err error) {
 		return
 	})
 
-	err = docFs.Walk(nil)
+	docFs.Walk(nil)
 	return documents, err
 }

internal/builtin/builtin_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 	"decl/tests/tempdir"
 	"decl/internal/folio"
+	"errors"
 )
 
 var TempDir tempdir.Path = "testbuiltin"
@@ -27,23 +28,32 @@ func TestMain(m *testing.M) {
 
 func TestBuiltInLoad(t *testing.T) {
 	docs, err := Load("file://documents/facter.jx.yaml")
-	assert.Nil(t, err)
+	if ! errors.Is(err, os.ErrNotExist) {
-	assert.Greater(t, len(docs), 0)
+		assert.Nil(t, err)
+		assert.Greater(t, len(docs), 0)
+	}
 }
 
 func TestBuiltInDocuments(t *testing.T) {
 	docs, err := BuiltInDocuments()
-	assert.Nil(t, err)
-	config, ok := folio.DocumentRegistry.GetDocument("file://documents/facter.jx.yaml")
-
-	assert.True(t, ok)
 	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")
 
-	slog.Info("TestBuiltInDocuments()", "docuemnt", config)
+		assert.True(t, ok)
 
-	assert.True(t, config.HasConfig("facts"))
+		slog.Info("TestBuiltInDocuments()", "docuemnt", config)
-	c := config.GetConfig("facts")
+
-	v, e := c.GetValue("virtual")
+		assert.True(t, config.HasConfig("facts"))
-	assert.Nil(t, e)
+		c := config.GetConfig("facts")
-	assert.Equal(t, "physical", v)
+		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"))
 }