compat build: adhere to q/quiet

Fixes: containers#12566
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

pkg/api/handlers/compat/images_build.go

@@ -655,7 +655,7 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 			return
 		case <-runCtx.Done():
 			if success {
-				if !utils.IsLibpodRequest(r) {
+				if !utils.IsLibpodRequest(r) && !query.Quiet {
 					m.Stream = fmt.Sprintf("Successfully built %12.12s\n", imageID)
 					if err := enc.Encode(m); err != nil {
 						logrus.Warnf("Failed to json encode error %v", err)

test/apiv2/10-images.at

@@ -196,12 +196,16 @@ fi
 curl -XPOST --data-binary @<(cat $CONTAINERFILE_TAR) \
     -H "content-type: application/tar" \
     --dump-header "${TMPD}/headers.txt" \
-    -o /dev/null \
-    "http://$HOST:$PORT/v1.40/libpod/build?dockerfile=containerfile" &> /dev/null
+    -o "${TMPD}/response.txt" \
+    "http://$HOST:$PORT/v1.40/build?dockerfile=containerfile&q=true" &> /dev/null
 if ! grep -q '200 OK' "${TMPD}/headers.txt"; then
     echo -e "${red}NOK: Image build from tar failed response was not 200 OK (application/tar)"
     BUILD_TEST_ERROR="1"
 fi
+if grep -E "\"[0-9a-f]{64}\\\n\"" $(jq .stream "${TMPD}/response.txt"); then
+    echo -e "${red} quiet-mode should only send image ID"
+    BUILD_TEST_ERROR="1"
+fi
 
 # Yes, this is very un-RESTful re: Content-Type header ignored when compatibility endpoint used
 # See https://github.com/containers/podman/issues/11012