#!/usr/bin/env bash
## apply_patch Apply patch to the target(official spacemacs) repository
##
## Copyright (c) 2014-2021 Sylvain Benner & Contributors
##
## Author: Eugene Yaremenko
## URL: https://github.com/syl20bnr/spacemacs
##
## This file is not part of GNU Emacs.
##
## License: GPLv3

exit_if_no_patchfile

echo_headline "Cloning target repository"
target_URL="https://github.com/${prj_owner}/${prj_repo}.git"
git clone "${target_URL}" -b "${PR_BRANCH}" "/tmp/${PUBLISH}"
if [ $? -ne 0 ]; then
    echo "Failed to clone \"${target_URL}\""
    exit 2
fi

cd "/tmp/${PUBLISH}"

echo_headline "Patching"
git apply --reject --whitespace=fix "/tmp/${PUBLISH}.patch"
if [ $? -ne 0 ]; then
    echo "Failed to apply \"/tmp/${PUBLISH}.patch\"."
    exit 2
fi

git add --all

if [[ $(git diff --stat) != '' ]]; then
    echo_headline "Creating commit"
    git commit -m "[bot] \"${PUBLISH}\" $(date -u)"
    if [ $? -ne 0 ]; then
        echo "Failed to create commit."
        exit 2
    fi
else
    echo "Nothing to commit."
    rm "/tmp/${PUBLISH}.patch"
    exit 0
fi