Added command for image inspect

cmd/os-image-composer/inspect_cmd.go

@@ -0,0 +1,118 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+
+	"github.com/open-edge-platform/os-image-composer/internal/image/imageinspect"
+	"github.com/open-edge-platform/os-image-composer/internal/utils/logger"
+	"github.com/spf13/cobra"
+	"gopkg.in/yaml.v3"
+)
+
+// cmd needs only these two methods.
+type inspector interface {
+	Inspect(imagePath string) (*imageinspect.ImageSummary, error)
+	DisplaySummary(w io.Writer, summary *imageinspect.ImageSummary)
+}
+
+// Allow tests to inject a fake inspector.
+var newInspector = func() inspector {
+	return imageinspect.NewDiskfsInspector() // returns *DiskfsInspector which satisfies inspector
+}
+
+// Output format command flags
+var (
+	outputFormat string = "text" // Output format for the inspection results
+	prettyJSON   bool   = true   // Pretty-print JSON output
+)
+
+// createInspectCommand creates the inspect subcommand
+func createInspectCommand() *cobra.Command {
+	validateCmd := &cobra.Command{
+		Use:   "inspect [flags] IMAGE_FILE",
+		Short: "inspects a RAW image file",
+		Long: `Inspect performs a deep inspection of a generated
+		RAW image and provides useful details of the image such as
+		partition table layout, filesystem type, bootloader type and 
+		configuration and overall SBOM details if available.`,
+		Args: cobra.ExactArgs(1),
+		PreRunE: func(cmd *cobra.Command, args []string) error {
+			switch outputFormat {
+			case "text", "json", "yaml":
+				return nil
+			default:
+				return fmt.Errorf("unsupported --format %q (supported: text, json, yaml)", outputFormat)
+			}
+		},
+		RunE:              executeInspect,
+		ValidArgsFunction: templateFileCompletion,
+	}
+
+	// Add flags
+	validateCmd.Flags().StringVar(&outputFormat, "format", "text",
+		"Specify the output format for the inspection results")
+
+	validateCmd.Flags().BoolVar(&prettyJSON, "pretty", false,
+		"Pretty-print JSON output (only for --format json)")
+
+	return validateCmd
+}
+
+// executeInspect handles the inspect command execution logic
+func executeInspect(cmd *cobra.Command, args []string) error {
+	log := logger.Logger()
+	imageFile := args[0]
+	log.Infof("Inspecting image file: %s", imageFile)
+
+	inspector := newInspector()
+
+	inspectionResults, err := inspector.Inspect(imageFile)
+	if err != nil {
+		return fmt.Errorf("image inspection failed: %v", err)
+	}
+
+	if err := writeInspectionResult(cmd, inspectionResults, outputFormat, prettyJSON); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func writeInspectionResult(cmd *cobra.Command, summary *imageinspect.ImageSummary, format string, pretty bool) error {
+	out := cmd.OutOrStdout()
+
+	switch format {
+	case "text":
+		imageinspect.PrintSummary(out, summary)
+		return nil
+
+	case "json":
+		var (
+			b   []byte
+			err error
+		)
+		if pretty {
+			b, err = json.MarshalIndent(summary, "", "  ")
+		} else {
+			b, err = json.Marshal(summary)
+		}
+		if err != nil {
+			return fmt.Errorf("marshal json: %w", err)
+		}
+		_, _ = fmt.Fprintln(out, string(b))
+		return nil
+
+	case "yaml":
+		b, err := yaml.Marshal(summary)
+		if err != nil {
+			return fmt.Errorf("marshal yaml: %w", err)
+		}
+		_, _ = fmt.Fprintln(out, string(b))
+		return nil
+
+	default:
+		return fmt.Errorf("unsupported output format: %s", format)
+	}
+}