#!/usr/bin/env bash
##
##  Script for bumping package revision.
##
##  Licensed under the Apache License, Version 2.0 (the "License");
##  you may not use this file except in compliance with the License.
##  You may obtain a copy of the License at
##
##    http://www.apache.org/licenses/LICENSE-2.0
##
##  Unless required by applicable law or agreed to in writing, software
##  distributed under the License is distributed on an "AS IS" BASIS,
##  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
##  See the License for the specific language governing permissions and
##  limitations under the License.
##

if [ "${#}" = "0" ]; then
	echo
	echo "Usage: revbump [package name] ..."
	echo
	echo "Add or increment TERMUX_PKG_REVISION of package."
	echo
	exit 1
fi

REPO_ROOT=$(realpath "$(dirname "$0")/../../")
IS_GIT_REPOSITORY=false

if git status >/dev/null 2>&1; then
	IS_GIT_REPOSITORY=true
fi

for package in "${@}"; do
	package="${package%%/}"
	buildsh_path="${REPO_ROOT}/packages/${package}/build.sh"

	if [ ! -f "${buildsh_path}" ]; then
		echo "${package}: skipping as no build.sh found"
		continue
	fi

	if grep -qP '^TERMUX_PKG_REVISION=(\d+)$' "${buildsh_path}"; then
		# Increment revision.
		current_rev=$(. "${buildsh_path}" 2>/dev/null; echo "${TERMUX_PKG_REVISION}")
		incremented_rev=$((current_rev + 1))

		# Replace revision value in build.sh.
		if ! ${IS_GIT_REPOSITORY}; then
			echo "${package}: bumping to ${incremented_rev}"
		fi
		sed -i -E "s/^(TERMUX_PKG_REVISION=)(.*)$/\1${incremented_rev}/g" "${buildsh_path}"
	else
		# Add base (1) revision right after TERMUX_PKG_VERSION.
		if ! ${IS_GIT_REPOSITORY}; then
			echo "${package}: setting revision to 1"
		fi
		sed -i -E "/TERMUX_PKG_VERSION=(.*)/a TERMUX_PKG_REVISION=1" "${buildsh_path}"
	fi

	# If we are on Git repository, prompt for committing changes.
	if ${IS_GIT_REPOSITORY}; then
		echo
		echo "You are about to commit these changes:"
		echo
		echo "--------------------"
		git --no-pager diff --patch "${buildsh_path}"
		echo "--------------------"
		echo
		echo "${package}: bump revision"
		echo
		read -re -p "Do you want to commit these changes ? (y/n) " CHOICE
		echo
		if [[ ${CHOICE} =~ (Y|y) ]]; then
			git add "${buildsh_path}"
			git commit -m "${package}: bump revision"
		else
			echo "Not committing to Git!"
		fi
		echo
	fi
done