130 lines
3.3 KiB
Go
130 lines
3.3 KiB
Go
// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
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package resource
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import (
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_ "context"
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"encoding/json"
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"fmt"
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"gopkg.in/yaml.v3"
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"io"
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"log/slog"
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_ "net/url"
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_ "os"
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"os/exec"
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"strings"
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"text/template"
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"decl/internal/codec"
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)
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type CommandExecutor func(value any) ([]byte, error)
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type CommandExtractAttributes func(output []byte, target any) error
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type CommandArg string
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type Command struct {
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Path string `json:"path" yaml:"path"`
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Args []CommandArg `json:"args" yaml:"args"`
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Split bool `json:"split" yaml:"split"`
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Executor CommandExecutor `json:"-" yaml:"-"`
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Extractor CommandExtractAttributes `json:"-" yaml:"-"`
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}
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func NewCommand() *Command {
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c := &Command{ Split: true }
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c.Executor = func(value any) ([]byte, error) {
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args, err := c.Template(value)
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if err != nil {
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return nil, err
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}
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cmd := exec.Command(c.Path, args...)
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slog.Info("execute() - cmd", "path", c.Path, "args", args)
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output, stdoutPipeErr := cmd.StdoutPipe()
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if stdoutPipeErr != nil {
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return nil, stdoutPipeErr
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}
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stderr, pipeErr := cmd.StderrPipe()
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if pipeErr != nil {
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return nil, pipeErr
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}
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if startErr := cmd.Start(); startErr != nil {
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return nil, startErr
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}
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slog.Info("execute() - start", "cmd", cmd)
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stdOutOutput, _ := io.ReadAll(output)
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stdErrOutput, _ := io.ReadAll(stderr)
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slog.Info("execute() - io", "stdout", string(stdOutOutput), "stderr", string(stdErrOutput))
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waitErr := cmd.Wait()
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slog.Info("execute()", "path", c.Path, "args", args, "output", string(stdOutOutput), "error", string(stdErrOutput))
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if len(stdErrOutput) > 0 {
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return stdOutOutput, fmt.Errorf(string(stdErrOutput))
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}
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return stdOutOutput, waitErr
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}
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return c
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}
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func (c *Command) Load(r io.Reader) error {
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return codec.NewYAMLDecoder(r).Decode(c)
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}
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func (c *Command) LoadDecl(yamlResourceDeclaration string) error {
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return codec.NewYAMLStringDecoder(yamlResourceDeclaration).Decode(c)
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}
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func (c *Command) Template(value any) ([]string, error) {
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var args []string = make([]string, 0, len(c.Args) * 2)
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for i, arg := range c.Args {
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var commandLineArg strings.Builder
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err := template.Must(template.New(fmt.Sprintf("arg%d", i)).Parse(string(arg))).Execute(&commandLineArg, value)
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if err != nil {
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return nil, err
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}
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if commandLineArg.Len() > 0 {
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var splitArg []string
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if c.Split {
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splitArg = strings.Split(commandLineArg.String(), " ")
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} else {
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splitArg = []string{commandLineArg.String()}
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}
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slog.Info("Template()", "split", splitArg, "len", len(splitArg))
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args = append(args, splitArg...)
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}
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}
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slog.Info("Template()", "Args", c.Args, "lencargs", len(c.Args), "args", args, "lenargs", len(args), "value", value)
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return args, nil
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}
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func (c *Command) Execute(value any) ([]byte, error) {
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return c.Executor(value)
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}
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func (c *CommandArg) UnmarshalValue(value string) error {
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*c = CommandArg(value)
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return nil
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}
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func (c *CommandArg) UnmarshalJSON(data []byte) error {
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var s string
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if unmarshalRouteTypeErr := json.Unmarshal(data, &s); unmarshalRouteTypeErr != nil {
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return unmarshalRouteTypeErr
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}
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return c.UnmarshalValue(s)
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}
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func (c *CommandArg) UnmarshalYAML(value *yaml.Node) error {
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var s string
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if err := value.Decode(&s); err != nil {
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return err
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}
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return c.UnmarshalValue(s)
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}
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