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#!/usr/bin/env bash
# Copyright (c) 2020 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# Linter to check that commit messages have a new line before the body
# or no body at all
export LC_ALL=C
EXIT_CODE=0
while getopts "?" opt; do
case $opt in
?)
echo "Usage: $0 [N]"
echo " COMMIT_RANGE='<commit range>' $0"
echo " $0 -?"
echo "Checks unmerged commits, the previous N commits, or a commit range."
echo "COMMIT_RANGE='47ba2c3...ee50c9e' $0"
exit ${EXIT_CODE}
;;
esac
done
if [ -z "${COMMIT_RANGE}" ]; then
if [ -n "$1" ]; then
COMMIT_RANGE="HEAD~$1...HEAD"
else
# This assumes that the target branch of the pull request will be master.
MERGE_BASE=$(git merge-base HEAD master)
COMMIT_RANGE="$MERGE_BASE..HEAD"
fi
fi
while IFS= read -r commit_hash || [[ -n "$commit_hash" ]]; do
n_line=0
while IFS= read -r line || [[ -n "$line" ]]; do
n_line=$((n_line+1))
length=${#line}
if [ $n_line -eq 2 ] && [ $length -ne 0 ]; then
echo "The subject line of commit hash ${commit_hash} is followed by a non-empty line. Subject lines should always be followed by a blank line."
EXIT_CODE=1
fi
done < <(git log --format=%B -n 1 "$commit_hash")
done < <(git log "${COMMIT_RANGE}" --format=%H)
exit ${EXIT_CODE}