Method createLogFile

pkgs/cmd/exec.go:125–162

createLogFile creates and initializes a log file with environment variables and command info.

(cmd *exec.Cmd)

// createLogFile creates and initializes a log file with environment variables and command info.
func (e *executor) createLogFile(cmd *exec.Cmd) (*os.File, error) {
	if e.logPath == "" {
		return nil, nil
	}

	// Create directory hierarchy if needed.
	if err := os.MkdirAll(filepath.Dir(e.logPath), os.ModePerm); err != nil {
		return nil, fmt.Errorf("failed to create log directory -> %w", err)
	}
	logFile, err := os.Create(e.logPath)
	if err != nil {
		return nil, fmt.Errorf("failed to create log file -> %w", err)
	}

	// Write environment variables.
	var buffer bytes.Buffer
	for _, envVar := range cmd.Env {
		fmt.Fprintf(&buffer, "%s\n", envVar)
	}

	// Write headers to log file.
	if _, err := io.WriteString(logFile, fmt.Sprintf("Environment:\n%s\n", buffer.String())); err != nil {
		logFile.Close()
		return nil, fmt.Errorf("failed to write environment to log -> %w", err)
	}

	commandLine := e.command
	if len(e.args) > 0 {
		commandLine += " " + strings.Join(e.args, " ")
	}

	if _, err := io.WriteString(logFile, fmt.Sprintf("%s: %s\n\n", e.title, commandLine)); err != nil {
		logFile.Close()
		return nil, fmt.Errorf("failed to write command to log -> %w", err)
	}

	return logFile, nil
}

// configureOutputs routes command output to appropriate destinations:
// - To stdout/stderr if output is nil (Execute)