gistfile1.sh

SINCE=$1
if [[ -z $SINCE ]]; then
	echo "usage: changelog <since>"
	exit 1
fi

shopt -s extglob

ISSUE_REGEX="#([0-9]+)"
MERGE_REGEX="Merge pull request $ISSUE_REGEX from ([^/]+)/"

ISSUES=()
OUTPUT=$(git log $SINCE... --merges --reverse -z --raw --format="format:- %w(80,0,4)%B")
while IFS= read -r -d '' COMMIT; do
	# Run the matcher
	if [[ ! $COMMIT =~ $MERGE_REGEX ]]; then
		continue
	fi

	# Grab the main PR and author
	PR="${BASH_REMATCH[1]}"
	AUTHOR="${BASH_REMATCH[2]}"

	# Strip the merge line
	DESCRIPTION=$(tail -n +2 <<<"$COMMIT" | grep -v "^$" | sed 's/^[ \t]*//')

	# Parse issues out
	COMMIT_ISSUES=("$PR")
	[[ $DESCRIPTION =~ $ISSUE_REGEX ]]
	COMMIT_ISSUES=($COMMIT_ISSUES ${BASH_REMATCH[@]:1})

	echo "- $DESCRIPTION"
	echo
	echo -n "  (props @$AUTHOR"
	for (( i = 0; i < ${#COMMIT_ISSUES[@]}; i++ )); do
		ISSUE=${COMMIT_ISSUES[$i]}
		ISSUES+=("$ISSUE")
		echo -n ", [#$ISSUE][gh-$ISSUE]"
	done
	echo ")"
	echo

done < <(git log $SINCE... --merges --reverse -z --raw --format="format:- %w(80,0,4)%B")

echo
for (( i = 0; i < ${#ISSUES[@]}; i++ )); do
	ISSUE=${ISSUES[$i]}
	echo "[gh-$ISSUE]: https://github.com/WP-API/WP-API/issues/$ISSUE"
done