#!/bin/sh

# apkgrel - display or bump pkgrel in APKBUILDs
# Copyright (c) 2012 Natanael Copa <ncopa@alpinelinux.org>
#
# Distributed under GPL-2
#

abuild_ver=@VERSION@
datadir=@datadir@

if ! [ -f "$datadir/functions.sh" ]; then
	echo "$datadir/functions.sh: not found" >&2
	exit 1
fi
. "$datadir/functions.sh"


do_show() {
	awk -F= '$1 == "pkgrel" { print $2 }' "$@"
}

do_set() {
	sed -e "/^pkgrel=/s/=.*/=${setto:-0}/" \
		-i "$@"
}

do_add () {
	local f= old=
	for f in "$@"; do
		[ -n "$only_clean_git" ] \
			&& [ -n "$(git diff --name-only $f)" ] \
			&& continue
		[ -d "$f" ] && f="$f/APKBUILD"
		old=$(do_show "$f")
		setto=$(($old + 1))
		do_set "$f" || return 1
	done
}

do_verify() {
	[ -n "$force" ] && return 0
	local f= rc=0
	for f in "$@"; do
		[ -d "$f" ] && f="$f/APKBUILD"
		if ! grep -q '^pkgrel=[0-9]' "$f"; then
			echo "$f: Has no proper pkgrel" >&2
			rc=1
		fi
	done
	return $rc
}

do_nothing() {
	return 0
}

usage() {
	cat >&2 <<__EOF__
$prog $abuild_ver - display or bump pkgrel in APKBUILDs
Usage: $prog [-z|--zero] [-a|--add] [-g|--clean-git] [-s|--set NUM] [-t|--test] [-f|--force] DIR or APKBUILD...
Options:
  -z, --zero       Set pkgrel to 0
  -a, --add        Add 1 to current pkgrel
  -g, --clean-git  Only operate on APKBUILDs with clean git status
  -s, --set NUM    Set pkgrel to NUM
  -t, --test       Only verify that files have a valid pkgrel
  -f, --force      Operate on files without a valid pkgrel
  -h, --help       Show this help

__EOF__
}

cmd=do_show
force=
setto=
only_clean_git=

args=`getopt -o zags:tfqh --long zero,add,clean-git,set:,test,force,quiet,help -n "$prog" -- "$@"`
if [ $? -ne 0 ]; then
	usage
	exit 2
fi
eval set -- "$args"
while true; do
	case $1 in
		-z|--zero) setto=0; cmd=do_set;;
		-a|--add) cmd=do_add;;
		-g|--clean-git) only_clean_git=1;;
		-s|--set) setto=$2; shift; cmd=do_set;;
		-t|--test) cmd=do_nothing;;
		-f|--force) force=1;;
		-q|--quiet) quiet=1;; # noop
		-h|--help) usage; exit;;
		--) shift; break;;
		*) exit 1;; # getopt error
	esac
	shift
done
if [ $# -eq 0 ]; then
	usage
	exit 2
fi

do_verify "$@" || exit 1
$cmd "$@"