precommit

#!/bin/sh
#
#   hooks/precommit hook script of https-everywhere.
#
#   Copyright (C) 2013, Jonathan Davies <jpdavs@gmail.com>
#
#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# Stash changes unrelated to the commit in Git.
echo "$(date -R): Stashing unrelated changes in Git..."
git stash -q --keep-index

# On exit, revert the stash done above.
trap 'echo "$(date -R): Reverting Git stash..."; git stash pop -q' EXIT

RULESET_PATTERN="src/chrome/content/rules/"
CHANGED_RULESETS="$(git diff --cached --name-only | grep $RULESET_PATTERN)"

if [ "$CHANGED_RULESETS" ]; then
    # Only run tests if our rulesets have been changed.
    echo "$(date -R): Running ruleset validation tests on changed rulesets:"

    for FILE in $CHANGED_RULESETS; do
        if [ ! -f $FILE ]; then
            # File may have been removed from Git.
            echo "$(date -R): Skipped validation of $FILE - not found."
            continue
        fi

        ./utils/trivial-validate.py --quiet $FILE
        RESULT=$?

        if [ $RESULT -ne 0 ]; then
            echo "$(date -R): Failure encountered during ruleset validation."
            exit $RESULT
        fi
    done

    echo "$(date -R): Ruleset validation successful."
else
    echo "$(date -R): Skipped ruleset validation tests, no changes in" \
        "$RULESET_PATTERN."
fi

exit 0