compat, build: suppress step errors when quiet is set

Match with docker API and suppress step errors when field quiet is set.

Closes: https://github.com/containers/podman/issues/14315

Signed-off-by: Aditya R <arajan@redhat.com>

2 files changed, 35 insertions, 6 deletions

diff --git a/pkg/api/handlers/compat/images_build.go b/pkg/api/handlers/compat/images_build.go
index bcd102901..0a1bc941d 100644
--- a/pkg/api/handlers/compat/images_build.go
+++ b/pkg/api/handlers/compat/images_build.go
@@ -674,15 +674,17 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 
 	enc := json.NewEncoder(body)
 	enc.SetEscapeHTML(true)
+	var stepErrors []string
 
 	for {
-		m := struct {
+		type BuildResponse struct {
 			Stream string                 `json:"stream,omitempty"`
 			Error  *jsonmessage.JSONError `json:"errorDetail,omitempty"`
 			// NOTE: `error` is being deprecated check https://github.com/moby/moby/blob/master/pkg/jsonmessage/jsonmessage.go#L148
 			ErrorMessage string          `json:"error,omitempty"` // deprecate this slowly
 			Aux          json.RawMessage `json:"aux,omitempty"`
-		}{}
+		}
+		m := BuildResponse{}
 
 		select {
 		case e := <-stdout.Chan():
@@ -698,12 +700,27 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 			}
 			flush()
 		case e := <-auxout.Chan():
-			m.Stream = string(e)
-			if err := enc.Encode(m); err != nil {
-				stderr.Write([]byte(err.Error()))
+			if !query.Quiet {
+				m.Stream = string(e)
+				if err := enc.Encode(m); err != nil {
+					stderr.Write([]byte(err.Error()))
+				}
+				flush()
+			} else {
+				stepErrors = append(stepErrors, string(e))
 			}
-			flush()
 		case e := <-stderr.Chan():
+			// Docker-API Compat parity : Build failed so
+			// output all step errors irrespective of quiet
+			// flag.
+			for _, stepError := range stepErrors {
+				t := BuildResponse{}
+				t.Stream = stepError
+				if err := enc.Encode(t); err != nil {
+					stderr.Write([]byte(err.Error()))
+				}
+				flush()
+			}
 			m.ErrorMessage = string(e)
 			m.Error = &jsonmessage.JSONError{
 				Message: m.ErrorMessage,
diff --git a/test/apiv2/10-images.at b/test/apiv2/10-images.at
index fd04e3f1b..13aaea317 100644
--- a/test/apiv2/10-images.at
+++ b/test/apiv2/10-images.at
@@ -225,6 +225,18 @@ t POST "images/load" ${TMPD}/test.tar 200 \
 t GET libpod/images/quay.io/libpod/alpine:latest/exists  204
 t GET libpod/images/quay.io/libpod/busybox:latest/exists  204
 
+CONTAINERFILE_WITH_ERR_TAR="${TMPD}/containerfile.tar"
+cat > $TMPD/containerfile << EOF
+FROM quay.io/fedora/fedora
+RUN echo 'some error' >&2
+EOF
+tar --format=posix -C $TMPD -cvf ${CONTAINERFILE_WITH_ERR_TAR} containerfile &> /dev/null
+t POST "build?q=1&dockerfile=containerfile" $CONTAINERFILE_WITH_ERR_TAR 200
+response_output=$(cat "$WORKDIR/curl.result.out")
+if [[ ${response_output} == *"some error"* ]];then
+    _show_ok 0 "compat quiet build" "~ $response_output" "found output from stderr in API"
+fi
+
 cleanBuildTest
 
 # vim: filetype=sh