Bump containers/buildah to v1.19.4

Fix handling of --iidfile to happen on the client side.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/buildah/imagebuildah/executor.go

@@ -115,6 +115,7 @@ type Executor struct {
 	imageInfoLock                  sync.Mutex
 	imageInfoCache                 map[string]imageTypeAndHistoryAndDiffIDs
 	fromOverride                   string
+	manifest                       string
 }
 
 type imageTypeAndHistoryAndDiffIDs struct {
@@ -231,6 +232,7 @@ func NewExecutor(store storage.Store, options BuildOptions, mainNode *parser.Nod
 		logRusage:                      options.LogRusage,
 		imageInfoCache:                 make(map[string]imageTypeAndHistoryAndDiffIDs),
 		fromOverride:                   options.From,
+		manifest:                       options.Manifest,
 	}
 	if exec.err == nil {
 		exec.err = os.Stderr
@@ -679,7 +681,7 @@ func (b *Executor) Build(ctx context.Context, stages imagebuilder.Stages) (image
 	}
 	logrus.Debugf("printing final image id %q", imageID)
 	if b.iidfile != "" {
-		if err = ioutil.WriteFile(b.iidfile, []byte(imageID), 0644); err != nil {
+		if err = ioutil.WriteFile(b.iidfile, []byte("sha256:"+imageID), 0644); err != nil {
 			return imageID, ref, errors.Wrapf(err, "failed to write image ID to file %q", b.iidfile)
 		}
 	} else {

vendor/github.com/containers/buildah/imagebuildah/stage_executor.go

@@ -838,7 +838,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 		// we need to call ib.Run() to correctly put the args together before
 		// determining if a cached layer with the same build args already exists
 		// and that is done in the if block below.
-		if checkForLayers && s.builder.Args == nil {
+		if checkForLayers && len(s.builder.Args) == 0 {
 			cacheID, err = s.intermediateImageExists(ctx, node, addedContentSummary, s.stepRequiresLayer(step))
 			if err != nil {
 				return "", nil, errors.Wrap(err, "error checking if cached image exists from a previous build")
@@ -1276,6 +1276,7 @@ func (s *StageExecutor) commit(ctx context.Context, createdBy string, emptyLayer
 		MaxRetries:            s.executor.maxPullPushRetries,
 		RetryDelay:            s.executor.retryPullPushDelay,
 		HistoryTimestamp:      s.executor.timestamp,
+		Manifest:              s.executor.manifest,
 	}
 	imgID, _, manifestDigest, err := s.builder.Commit(ctx, imageRef, options)
 	if err != nil {