Add a platform.ParseAll helper

Signed-off-by: Jin Dong <djdongjin95@gmail.com>

pkg/transfer/local/push.go

@@ -37,13 +37,9 @@ func (ts *localTransferService) push(ctx context.Context, ig transfer.ImageGette
 		// TODO: Platform matching
 		if pushCtx.PlatformMatcher == nil {
 			if len(pushCtx.Platforms) > 0 {
-				var ps []ocispec.Platform
-				for _, platform := range pushCtx.Platforms {
-					p, err := platforms.Parse(platform)
-					if err != nil {
-						return fmt.Errorf("invalid platform %s: %w", platform, err)
-					}
-					ps = append(ps, p)
+				ps, err := platforms.ParseAll(pushCtx.Platforms)
+				if err != nil {
+					return err
 				}
 				pushCtx.PlatformMatcher = platforms.Any(ps...)
 			} else {