docker library: use DecodeRC for warnings

non-fatal things are listed as warnings so its easy to look at bb interface
to see which docker library job actually did the work rather than just skipping.

master-nonlatent/master.cfg

@@ -3,6 +3,7 @@
 
 from buildbot.plugins import *
 from buildbot.process.properties import Property, Properties
+from buildbot.process.results import SUCCESS, FAILURE, WARNINGS
 from buildbot.steps.shell import ShellCommand, Compile, Test, SetPropertyFromCommand
 from buildbot.steps.mtrlogobserver import MTR, MtrLogObserver
 from buildbot.steps.source.github import GitHub
@@ -677,6 +678,8 @@ f_wordpress.addStep(
 )
 
 # f_dockerlibrary
+DECODE_RC={0:SUCCESS,1:FAILURE,2:WARNINGS}
+
 f_dockerlibrary = util.BuildFactory()
 f_dockerlibrary.addStep(
     steps.ShellCommand(
@@ -696,6 +699,7 @@ f_dockerlibrary.addStep(
         env={
             "ARTIFACTS_URL": os.environ["ARTIFACTS_URL"]
         },
+        decodeRC=DECODE_RC,
         command=[
             "bash",
             "-xc",
@@ -708,6 +712,7 @@ f_dockerlibrary.addStep(
 f_dockerlibrary.addStep(
     steps.ShellCommand(
         name="test MariaDB docker library image",
+        decodeRC=DECODE_RC,
         command=[
             "bash",
             "-xc",
@@ -720,6 +725,7 @@ f_dockerlibrary.addStep(
 f_dockerlibrary.addStep(
     steps.ShellCommand(
         name="build quay.io manifest image for MariaDB",
+        decodeRC=DECODE_RC,
         command=[
             "bash",
             "-xc",

scripts/docker-library-build.sh

@@ -86,7 +86,7 @@ entries=$(wc -l < "$reffile")
 if [ "$entries" -lt ${#arches[@]} ]; then
 	echo "Only $entries architectures so far"
 	# so we're not going to do anything until we have a full list.
-	exit 0
+	exit 2
 fi
 
 # Don't remove file here. Leave a manual retrigger of

scripts/docker-library-manifest.sh

@@ -40,7 +40,7 @@ if ! buildah manifest exists "$image"; then
 	echo "No manifest we can't push"
 	# Not fatal, but this means logic can stay
 	# here rather than in bb steps.
-	exit 0
+	exit 2
 fi
 
 #

scripts/docker-library-test.sh

@@ -15,7 +15,7 @@ fi
 
 if ! buildah manifest exists "$image"; then
 	echo "No manifest we can't test"
-	exit 0
+	exit 2
 fi
 #
 # TEST Image
@@ -24,7 +24,7 @@ fi
 if [ "${builderarch}" != amd64 ]; then
   export DOCKER_LIBRARY_START_TIMEOUT=350
   echo "Temporarily disable non-amd64 testing"
-  exit 0
+  exit 2
 else
   export DOCKER_LIBRARY_START_TIMEOUT=150
 fi