#!/bin/sh
#Copyright (c) 2008-2020 Juan Romero Pardines and contributors
# Copyright (c) 2017-2025 The Void Linux team and contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# changed_templates.sh

tip="$(git rev-list -1 --parents HEAD)"
case "$tip" in
	# This is a merge commit, pick last parent
	*" "*" "*) tip="${tip##* }" ;;
	# This is a non-merge commit, pick itself
	*)         tip="${tip%% *}" ;;
esac

base="$(git merge-base origin/HEAD "$tip")"

# simply get parent for direct master-commits
if [ "$base" = "$tip" ]; then
    base="$(git rev-list -1 "$tip"~1)"
fi

echo "$base $tip" >/tmp/revisions

/bin/echo -e '\x1b[32mChanged packages:\x1b[0m'
git diff-tree -r --no-renames --name-only --diff-filter=AM \
	"$base" "$tip" \
	-- 'srcpkgs/*/template' |
	cut -d/ -f 2 |
	tee detected_templates |
	sed "s/^/  /" >&2