Comment Pending JJB Changes on Patchset

After submitting a releng patchset a comment listing the jobs that are
added, modified, or deleted by the change will be posted to the review.

Change-Id: I53562c9ad5b0185d3dfe354e265e250c7e9f7f72
Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

2 files changed, 72 insertions, 0 deletions

diff --git a/jjb/releng/generate-job-list.sh b/jjb/releng/generate-job-list.sh
new file mode 100755
index 000000000..b32a514e5
--- /dev/null
+++ b/jjb/releng/generate-job-list.sh
@@ -0,0 +1,68 @@
+#! /bin/bash
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# SPDX-license-identifier: Apache-2.0
+##############################################################################
+# Copyright (c) 2016 Linux Foundation and others.
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+# Job Number Formatter
+function JOBS {
+    local NUMS=$1
+    if [ $NUMS == 1 ]; then
+        echo -n "Job"
+    else
+        echo -n "Jobs"
+    fi
+}
+
+# We expect job_output to exist prior to this being run and contain the
+# output from jenkins-jobs test
+
+echo "> Generating list of previous JJB jobs..."
+git checkout -q -b previous-commit HEAD^
+jenkins-jobs -l ERROR test -r jjb -o job_output_prev
+git checkout -q - && git branch -q -d previous-commit
+
+echo "> Finding job changes ..."
+diff -r -q job_output job_output_prev &> job_diff.txt || true
+
+# Only in (job_output) = NEW
+# Only in (job_output_prev) = DELETED
+# Files ... differ = MODIFIED
+
+declare -a JOBS_ADDED=($(grep 'job_output:' job_diff.txt | cut -d':' -f2- | sed 's/^[ \t]*//;s/[ \t]*$//'))
+declare -a JOBS_MODIFIED=($(grep 'differ$' job_diff.txt | sed "s/Files job_output\/\(.*\) and.*/\1/g"))
+declare -a JOBS_REMOVED=($(grep 'job_output_prev:' job_diff.txt | cut -d ':' -f2- | sed 's/^[ \t]*//;s/[ \t]*$//'))
+
+NUM_JOBS_ADDED=${#JOBS_ADDED[@]}
+NUM_JOBS_MODIFIED=${#JOBS_MODIFIED[@]}
+NUM_JOBS_REMOVED=${#JOBS_REMOVED[@]}
+
+echo "> Writing gerrit comment ..."
+if [ $NUM_JOBS_ADDED -gt 0 ]; then
+    JOB_STRING="$(JOBS $NUM_JOBS_ADDED)"
+    { printf "Added %s %s:\n\n" "${NUM_JOBS_ADDED}" "$JOB_STRING";
+    printf '* %s\n' "${JOBS_ADDED[@]}";
+    printf "\n"; } >> gerrit_comment.txt
+fi
+
+if [ $NUM_JOBS_MODIFIED -gt 0 ]; then
+    JOB_STRING="$(JOBS $NUM_JOBS_MODIFIED)"
+    { printf "Modified %s %s:\n\n" "${NUM_JOBS_MODIFIED}" "$JOB_STRING";
+    printf '* %s\n' "${JOBS_MODIFIED[@]}";
+    printf "\n"; } >> gerrit_comment.txt
+fi
+
+if [ $NUM_JOBS_REMOVED -gt 0 ]; then
+    JOB_STRING="$(JOBS $NUM_JOBS_REMOVED)"
+    { printf "Removed %s %s:\n\n" "${NUM_JOBS_REMOVED}" "$JOB_STRING";
+    printf '* %s\n' "${JOBS_REMOVED[@]}";
+    printf "\n"; } >> gerrit_comment.txt
+fi
diff --git a/jjb/releng/releng-ci-jobs.yml b/jjb/releng/releng-ci-jobs.yml
index ecc87303f..be291b00d 100644
--- a/jjb/releng/releng-ci-jobs.yml
+++ b/jjb/releng/releng-ci-jobs.yml
@@ -48,6 +48,10 @@
     builders:
         - shell:
             !include-raw: verify-releng.sh
+        - shell:
+            !include-raw-escape: generate-job-list.sh
+        - report-build-result-to-gerrit
+
 
     publishers:
         - archive-artifacts: