cmd/mbf: optionally read report in info

This is a useful frontend for the report files before web server is ready.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/mbf/main.go

@@ -134,15 +134,29 @@ func main() {
 	{
 		var (
 			flagStatus bool
+			flagReport string
 		)
 		c.NewCommand(
 			"info",
 			"Display out-of-band metadata of an artifact",
-			func(args []string) error {
+			func(args []string) (err error) {
 				if len(args) == 0 {
 					return errors.New("info requires at least 1 argument")
 				}
 
+				var r *rosa.Report
+				if flagReport != "" {
+					if r, err = rosa.OpenReport(flagReport); err != nil {
+						return err
+					}
+					defer func() {
+						if closeErr := r.Close(); err == nil {
+							err = closeErr
+						}
+					}()
+					defer r.HandleAccess(&err)()
+				}
+
 				for i, name := range args {
 					if p, ok := rosa.ResolveName(name); !ok {
 						return fmt.Errorf("unknown artifact %q", name)
@@ -160,22 +174,38 @@ func main() {
 								strings.TrimSuffix(meta.Website, "/"))
 						}
 
-						if flagStatus {
 						const statusPrefix = "status      : "
-							r, err := cache.OpenStatus(rosa.Std.Load(p))
+						if flagStatus {
+							if r == nil {
+								var f io.ReadSeekCloser
+								f, err = cache.OpenStatus(rosa.Std.Load(p))
 								if err != nil {
 									if errors.Is(err, os.ErrNotExist) {
 										fmt.Println(
-										statusPrefix + name + " was never cured",
+											statusPrefix + "not yet cured",
 										)
 									} else {
-									return err
+										return
 									}
 								} else {
 									fmt.Print(statusPrefix)
-								_, err = io.Copy(os.Stdout, r)
+									_, err = io.Copy(os.Stdout, f)
-								if err = errors.Join(err, r.Close()); err != nil {
+									if err = errors.Join(err, f.Close()); err != nil {
-									return err
+										return
+									}
+								}
+							} else {
+								status, n := r.ArtifactOf(cache.Ident(rosa.Std.Load(p)))
+								if status == nil {
+									fmt.Println(
+										statusPrefix + "not in report",
+									)
+								} else {
+									fmt.Println("size        :", n)
+									fmt.Print(statusPrefix)
+									if _, err = os.Stdout.Write(status); err != nil {
+										return
+									}
 								}
 							}
 						}
@@ -192,6 +222,11 @@ func main() {
 				&flagStatus,
 				"status", command.BoolFlag(false),
 				"Display cure status if available",
+			).
+			Flag(
+				&flagReport,
+				"report", command.StringFlag(""),
+				"Load cure status from this report file instead of cache",
 			)
 	}