[ticket/11509] Fail on Travis CI if commit messages are improperly formatted.

PHPBB3-11509

.travis.yml

@@ -24,3 +24,4 @@ before_script:
 
 script:
   - sh -c "if [ '$TRAVIS_PHP_VERSION' = '5.2' ]; then phpunit --configuration travis/phpunit-$DB-travis.xml; else phpBB/vendor/bin/phpunit --configuration travis/phpunit-$DB-travis.xml; fi"
+  - sh -c "if [ '$TRAVIS_PULL_REQUEST' != 'false' ]; then git-tools/commit-msg-hook-range.sh $TRAVIS_COMMIT_RANGE; fi"

git-tools/commit-msg-hook-range.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+# @copyright (c) 2014 phpBB Group
+# @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+#
+# Calls the git commit-msg hook on all non-merge commits in a given commit range.
+#
+set -e
+
+if [ "$#" -ne 1 ];
+then
+	echo "Expected one argument (commit range, e.g. eef1b586...1666476b)."
+	exit
+fi
+
+DIR=$(dirname "$0")
+COMMIT_MSG_HOOK_PATH="$DIR/hooks/commit-msg"
+
+COMMIT_RANGE="$1"
+
+for COMMIT_HASH in $(git rev-list --no-merges "$COMMIT_RANGE")
+do
+	# The git commit-msg hook takes a path to a file containing a commit
+	# message. So we have to extract the commit message into a file first,
+	# which then also needs to be deleted after our work is done.
+	COMMIT_MESSAGE_PATH="$DIR/commit_msg.$COMMIT_HASH"
+	git log -n 1 --pretty=format:%B "$COMMIT_HASH" > "$COMMIT_MESSAGE_PATH"
+	"$COMMIT_MSG_HOOK_PATH" "$COMMIT_MESSAGE_PATH"
+	rm "$COMMIT_MESSAGE_PATH"
+done