Simplistic abuild wrapper for building packages out-of-the-tree.

## abuild.sh
#!/bin/sh
# SPDX-License-Identifier: MIT

## Copyright (C) 2017 Przemyslaw Pawelczyk <przemoc@gmail.com>
##
## This script is licensed under the terms of the MIT license.
## https://opensource.org/licenses/MIT
#
# abuild.sh
# Simplistic abuild wrapper for building packages out-of-the-tree.
#
# Put it in its own directory, and everything will be generated there.
# Why?  Because I strongly dislike the idea of polluting local aports clone.
# I keep the script in ~/abuild/.  You can also put symlink to it in ~/bin/.

if [ $# -lt 1 ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
	echo "usage: $0 [-f] [-K] [--] [PATH-TO-APKBUILD-FILE-OR-DIR-WITH-IT]..."
	exit 0
fi

ORIGPWD=$(pwd)

TOPDIR=$(readlink -f "${0%/*}")
echo TOPDIR="$TOPDIR"

REPODEST="$TOPDIR/repo"
mkdir -p "$REPODEST"
echo REPODEST="$REPODEST"
export REPODEST

SRCDEST="$TOPDIR/sources"
mkdir -p "$SRCDEST"
echo SRCDEST="$SRCDEST"
export SRCDEST

srcdir="$TOPDIR/.src"
mkdir -p "$srcdir"
echo srcdir="$srcdir"
export srcdir

pkgbasedir="$TOPDIR/.pkg"
mkdir -p "$pkgbasedir"
echo pkgbasedir="$pkgbasedir"
export pkgbasedir

FORCE=
if [ "$1" = "-f" ]; then
	FORCE=-f
	shift
fi

KEEP=
if [ "$1" = "-K" ]; then
	KEEP=-K
	shift
fi

[ "$1" != "--" ] || shift

export APKBUILD

cd "$TOPDIR"

while [ $# -gt 0 ]; do
	APKBUILD="$1"
	shift
	[ "${APKBUILD#/}" != "$APKBUILD" ] || APKBUILD="$ORIGPWD/${APKBUILD#./}"
	[ "${APKBUILD%/APKBUILD}" != "$APKBUILD" ] || APKBUILD="${APKBUILD%/}/APKBUILD"
	echo APKBUILD="$APKBUILD"
	if ! [ -r "$APKBUILD" ]; then
		echo "$0: $APKBUILD is not readable!" >&2
		continue
	fi
	abuild $FORCE $KEEP -r
done