#!/bin/bash
# Copyright (C) 2014 Luke Shumaker <lukeshu@sbcglobal.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Get the date as the *very* first thing
newpkgver_date=$(LC_ALL=C date -u +%Y%m%d)

export PATH # because of setuid safety, path may be currently un-exported
. "$(librelib messages)"
setup_traps

# Next: get the gitver as soon as possible, we don't want another commit to
# change it
if [[ $PWD != *.git ]]; then
	die "should be run as a hook from a git repository"
fi
newgitver=$(git log -n1 --format='%H' master -- blacklist.txt)

# Option parsing ###############################################################

if [[ $# != 1 ]]; then
	die "%q takes exactly 1 argument" "$0"
fi
PACKAGE=$1
package_re='^[^/]+/[^/]+$'
if ! [[ $PACKAGE =~ $package_re ]]; then
	die "PACKAGE must be in the format REPO/PKGBASE: %s" "$PACKAGE"
fi

# It doesn't seem like it, but this is the earliest we can possibly lock
lock 9 "${HOME}/packages/lockdir/${PACKAGE}" \
	"Waiting for previous run of %q to finish" "$0"

################################################################################

. "$(librelib conf)" || exit 1
load_files libretools || exit 1
check_vars libretools WORKDIR ABSLIBRERECV ABSLIBRESEND || exit 1

# Get the ABSLibre tree
gitget -f -p "$ABSLIBRESEND" checkout "$ABSLIBRERECV" "$WORKDIR/abslibre"
if ! [[ -f "${WORKDIR}/abslibre/${PACKAGE}/PKGBUILD" ]]; then
	die "package does not exist in abslibre.git: %s" "$PACKAGE"
fi
cd "$WORKDIR/abslibre/${PACKAGE}"

# Figure out info about the last version
oldgitver=$(sed -n 's/^_gitver=//p' PKGBUILD)
oldpkgver=$(sed -n 's/^pkgver=//p' PKGBUILD)
oldpkgver_date=${oldpkgver%%.*}
oldpkgver_rel=${oldpkgver#${oldpkgver_date}}; oldpkgver_rel=${oldpkgver_rel#.}; oldpkgver_rel=${oldpkgver_rel:-0}

# Make sure we actually have changes
if [[ "$newgitver" == "$oldgitver" ]]; then
	msg 'blacklist.txt has not changed, nothing to do'
	exit 0
fi

# Handle doing multiple versions in the same day
if [[ "$newpkgver_date" == "$oldpkgver_date" ]]; then
	declare -i newpkgver_rel=${oldpkgver_rel}+1
	newpkgver=${newpkgver_date}.${newpkgver_rel}
else
	newpkgver=${newpkgver_date}
fi

# Update the PKGBUILD
sed -i -e "s|^pkgver=.*|pkgver=${newpkgver}|" \
       -e "s|^_gitver=.*|_gitver=${newgitver}|" \
       -e 's|^pkgrel=.*|pkgrel=1|' \
       PKGBUILD
updpkgsums
git add PKGBUILD
git commit -m 'Update libre/your-freedom'

# Build the new package
makepkg -c
librestage "${PACKAGE%/*}"

# Publish the updates
git push
librerelease