v0.8.3: add sidecar inspection

cmd/photoscli/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"encoding/xml"
 	"fmt"
@@ -91,6 +92,8 @@ func run(args []string, stdout, stderr io.Writer, bridge photos.Bridge) int {
 		return cmdFailures(args[1:], stdout, stderr)
 	case "status":
 		return cmdStatus(args[1:], stdout, stderr)
+	case "sidecar":
+		return cmdSidecar(args[1:], stdout, stderr)
 	case "version", "--version", "-v":
 		fmt.Fprintln(stdout, version)
 		return exitOK
@@ -132,6 +135,7 @@ USAGE
   photoscli retry-failed --out <dir> --clear-on-success
   photoscli failures list --out <dir>
   photoscli failures clear --out <dir>
+  photoscli sidecar inspect <file.xmp> [--json]
   photoscli status --out <dir> [--json]
   photoscli version
   photoscli help
@@ -176,6 +180,9 @@ COMMANDS
   failures list|clear --out <dir>
       List or clear deduplicated failure records.
 
+  sidecar inspect <file.xmp> [--json]
+      Read a generated XMP sidecar and print key photoscli metadata.
+
   status --out <dir> [--manifest jsonl|sqlite] [--json]
       Show manifest type, entry count, and failure count for a backup.
 
@@ -2187,6 +2194,68 @@ func verifySidecar(stdout io.Writer, outDir, id, checkPath string) int {
 	return 0
 }
 
+func cmdSidecar(args []string, stdout, stderr io.Writer) int {
+	if len(args) < 1 || args[0] != "inspect" {
+		fmt.Fprintln(stderr, "error: expected sidecar inspect <file.xmp>")
+		return exitErr
+	}
+	if len(args) < 2 {
+		fmt.Fprintln(stderr, "error: sidecar inspect requires <file.xmp>")
+		return exitErr
+	}
+	path := args[1]
+	data, err := readFileFunc(path)
+	if err != nil {
+		fmt.Fprintf(stderr, "error: %v\n", err)
+		return exitErr
+	}
+	meta := inspectXMP(data)
+	if len(meta) == 0 {
+		fmt.Fprintln(stderr, "error: no photoscli metadata found")
+		return exitErr
+	}
+	if hasFlag(args[2:], "--json") {
+		if err := json.NewEncoder(stdout).Encode(meta); err != nil {
+			fmt.Fprintf(stderr, "error: %v\n", err)
+			return exitErr
+		}
+		return exitOK
+	}
+	keys := make([]string, 0, len(meta))
+	for k := range meta {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	for _, k := range keys {
+		fmt.Fprintf(stdout, "%s\t%s\n", k, meta[k])
+	}
+	return exitOK
+}
+
+func inspectXMP(data []byte) map[string]string {
+	attrs := map[string]string{}
+	dec := xml.NewDecoder(bytes.NewReader(data))
+	for {
+		tok, err := dec.Token()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return attrs
+		}
+		start, ok := tok.(xml.StartElement)
+		if !ok {
+			continue
+		}
+		for _, a := range start.Attr {
+			if a.Name.Space == "photoscli" || a.Name.Space == "https://gitea.k3s.k0.nu/tools/photocli/ns/1.0/" {
+				attrs[a.Name.Local] = a.Value
+			}
+		}
+	}
+	return attrs
+}
+
 func cmdRetryFailed(args []string, stdout, stderr io.Writer, bridge photos.Bridge) int {
 	outDir := flagVal(args, "--out")
 	clearOnSuccess := hasFlag(args, "--clear-on-success")