cmd/mbf: cure status report command

This emits a report stream for the opened cache into the specified file.

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

cmd/mbf/main.go

@@ -195,6 +195,41 @@ func main() {
 			)
 	}
 
+	c.NewCommand(
+		"report",
+		"Generate an artifact cure report for the current cache",
+		func(args []string) (err error) {
+			var w *os.File
+			switch len(args) {
+			case 0:
+				w = os.Stdout
+
+			case 1:
+				if w, err = os.OpenFile(
+					args[0],
+					os.O_CREATE|os.O_EXCL|syscall.O_WRONLY,
+					0,
+				); err != nil {
+					return
+				}
+				defer func() {
+					closeErr := w.Close()
+					if err == nil {
+						err = closeErr
+					}
+				}()
+
+			default:
+				return errors.New("report requires 1 argument")
+			}
+
+			if container.Isatty(int(w.Fd())) {
+				return errors.New("output appears to be a terminal")
+			}
+			return rosa.WriteReport(msg, w, cache)
+		},
+	)
+
 	c.NewCommand("updates", command.UsageInternal, func([]string) error {
 		var n int
 		for i := range rosa.PresetEnd {