cmd/mbf: dump IR of artifact presets

This exposes IR outside test cases, useful for verifying correctness of alternative IR emitters.

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

cmd/mbf/main.go

@@ -150,24 +150,50 @@ func main() {
 		},
 	)
 
-	c.NewCommand(
-		"cure",
-		"Cure the named artifact and show its path",
-		func(args []string) error {
-			if len(args) != 1 {
-				return errors.New("cure requires 1 argument")
-			}
-			if p, ok := rosa.ResolveName(args[0]); !ok {
-				return fmt.Errorf("unsupported artifact %q", args[0])
-			} else {
-				pathname, _, err := cache.Cure(rosa.Std.Load(p))
-				if err == nil {
-					log.Println(pathname)
+	{
+		var (
+			flagDump string
+		)
+		c.NewCommand(
+			"cure",
+			"Cure the named artifact and show its path",
+			func(args []string) error {
+				if len(args) != 1 {
+					return errors.New("cure requires 1 argument")
 				}
-				return err
-			}
-		},
-	)
+				if p, ok := rosa.ResolveName(args[0]); !ok {
+					return fmt.Errorf("unsupported artifact %q", args[0])
+				} else if flagDump == "" {
+					pathname, _, err := cache.Cure(rosa.Std.Load(p))
+					if err == nil {
+						log.Println(pathname)
+					}
+					return err
+				} else {
+					f, err := os.OpenFile(
+						flagDump,
+						os.O_WRONLY|os.O_CREATE|os.O_EXCL,
+						0644,
+					)
+					if err != nil {
+						return err
+					}
+
+					if err = cache.EncodeAll(f, rosa.Std.Load(p)); err != nil {
+						_ = f.Close()
+						return err
+					}
+
+					return f.Close()
+				}
+			},
+		).
+			Flag(
+				&flagDump,
+				"dump", command.StringFlag(""),
+				"Write IR to specified pathname and terminate",
+			)
+	}
 
 	c.MustParse(os.Args[1:], func(err error) {
 		if cache != nil {