Support non-standard install locations

This build system overhaul allows for adding (define-style) macros to
our scripts. All source files are now suffixed with ".in" to clarify
that they might contain unprocessed defines. The Makefile provides a new
rule to preprocess source files and generate proper output scripts.

Also, add a "@pkgdatadir@" define (as used in GNU Autotools) and use it
instead of hardcoded paths to "/usr/share/devtools" everywhere. We
missed this when adding PREFIX support to the build system in commit
35fc83ce7d8dc26cd424321f2e8638d05da0a6d4.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

1 files changed, 231 insertions, 0 deletions

diff --git a/mkarchroot.in b/mkarchroot.in
new file mode 100644
index 0000000..8e74c54
--- /dev/null
+++ b/mkarchroot.in
@@ -0,0 +1,231 @@
+#!/bin/bash
+# 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; version 2 of the License.
+#
+# 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.
+
+FORCE='n'
+RUN=''
+NOCOPY='n'
+
+working_dir=''
+
+APPNAME=$(basename "${0}")
+
+# usage: usage <exitvalue>
+usage() {
+	echo "usage ${APPNAME} [options] working-dir [package-list | app]"
+	echo ' options:'
+	echo '    -r <app>      Run "app" within the context of the chroot'
+	echo '    -u            Update the chroot via pacman'
+	echo '    -f            Force overwrite of files in the working-dir'
+	echo '    -C <file>     Location of a pacman config file'
+	echo '    -M <file>     Location of a makepkg config file'
+	echo '    -n            Do not copy config files into the chroot'
+	echo '    -c <dir>      Set pacman cache. Default: /var/cache/pacman/pkg'
+	echo '    -h            This message'
+	exit $1
+}
+
+while getopts 'r:ufnhC:M:c:' arg; do
+	case "${arg}" in
+		r) RUN="$OPTARG" ;;
+		u) RUN='/bin/sh -c "pacman -Syu --noconfirm && (pacman -Qqu >/dev/null && pacman -Su --noconfirm || exit 0)"' ;;
+		f) FORCE='y' ;;
+		C) pac_conf="$OPTARG" ;;
+		M) makepkg_conf="$OPTARG" ;;
+		n) NOCOPY='y' ;;
+		c) cache_dir="$OPTARG" ;;
+		h|?) usage 0 ;;
+		*) echo "invalid argument '${arg}'"; usage 1 ;;
+	esac
+done
+
+if [ "$EUID" != '0' ]; then
+	echo 'error: this script must be run as root.'
+	exit 1
+fi
+
+shift $(($OPTIND - 1))
+
+if [ "$RUN" = '' -a $# -lt 2 ]; then
+	echo 'you must specify a directory and one or more packages'
+	usage 1
+elif [ $# -lt 1 ]; then
+	echo 'you must specify a directory'
+	usage 1
+fi
+
+working_dir="$(readlink -f ${1})"
+shift 1
+
+[ "${working_dir}" = '' ] && echo 'error: please specify a working directory' && usage 1
+
+if [ -z "$cache_dir" ]; then
+	cache_conf=${working_dir}/etc/pacman.conf
+	[ ! -f $cache_conf ] && cache_conf=${pac_conf:-/etc/pacman.conf}
+	cache_dir=$( (grep -m 1 '^CacheDir' $cache_conf || echo 'CacheDir = /var/cache/pacman/pkg') | sed 's/CacheDir\s*=\s*//')
+	unset cache_conf
+fi
+
+if [ -f /etc/pacman.d/mirrorlist ]; then
+	host_mirror=$(pacman -Sddp extra/devtools 2>/dev/null | sed -E 's#(.*/)extra/os/.*#\1$repo/os/$arch#')
+fi
+if [ -z "${host_mirror}" ]; then
+	host_mirror='http://mirrors.kernel.org/archlinux/$repo/os/$arch'
+fi
+if echo "${host_mirror}" | grep -q 'file://'; then
+	host_mirror_path=$(echo "${host_mirror}" | sed -E 's#file://(/.*)/\$repo/os/\$arch#\1#g')
+fi
+
+# {{{ functions
+chroot_mount() {
+	[ -e "${working_dir}/sys" ] || mkdir "${working_dir}/sys"
+	mount -t sysfs sysfs "${working_dir}/sys"
+
+	[ -e "${working_dir}/proc" ] || mkdir "${working_dir}/proc"
+	mount -t proc proc "${working_dir}/proc"
+
+	[ -e "${working_dir}/dev" ] || mkdir "${working_dir}/dev"
+	mount -t tmpfs dev "${working_dir}/dev" -o mode=0755,size=10M,nosuid
+	mknod -m 666 "${working_dir}/dev/null" c 1 3
+	mknod -m 666 "${working_dir}/dev/zero" c 1 5
+	mknod -m 600 "${working_dir}/dev/console" c 5 1
+	mknod -m 644 "${working_dir}/dev/random" c 1 8
+	mknod -m 644 "${working_dir}/dev/urandom" c 1 9
+	mknod -m 666 "${working_dir}/dev/tty" c 5 0
+	mknod -m 666 "${working_dir}/dev/tty0" c 4 0
+	mknod -m 666 "${working_dir}/dev/full" c 1 7
+	ln -s /proc/kcore "${working_dir}/dev/core"
+	ln -s /proc/self/fd "${working_dir}/dev/fd"
+	ln -s /proc/self/fd/0 "${working_dir}/dev/stdin"
+	ln -s /proc/self/fd/1 "${working_dir}/dev/stdout"
+	ln -s /proc/self/fd/2 "${working_dir}/dev/stderr"
+
+	[ -e "${working_dir}/dev/shm" ] || mkdir "${working_dir}/dev/shm"
+	mount -t tmpfs shm "${working_dir}/dev/shm" -o nodev,nosuid,size=128M
+
+	[ -e "${working_dir}/dev/pts" ] || mkdir "${working_dir}/dev/pts"
+	mount -t devpts devpts "${working_dir}/dev/pts" -o newinstance,ptmxmode=666
+	ln -s pts/ptmx "${working_dir}/dev/ptmx"
+
+	[ -e "${cache_dir}" ] || mkdir -p "${cache_dir}"
+	[ -e "${working_dir}/${cache_dir}" ] || mkdir -p "${working_dir}/${cache_dir}"
+	mount -o bind "${cache_dir}" "${working_dir}/${cache_dir}"
+
+	if [ -n "${host_mirror_path}" ]; then
+		[ -e "${working_dir}/${host_mirror_path}" ] || mkdir -p "${working_dir}/${host_mirror_path}"
+		mount -o bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}"
+		mount -o remount,ro,bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}"
+	fi
+
+	trap 'chroot_umount' EXIT INT QUIT TERM HUP
+}
+
+copy_hostconf () {
+	chroot "${working_dir}" /bin/findmnt -rnu -o SOURCE,TARGET,FSTYPE,OPTIONS > "${working_dir}/etc/mtab"
+	cp /etc/resolv.conf "${working_dir}/etc/resolv.conf"
+	echo "Server = ${host_mirror}" > ${working_dir}/etc/pacman.d/mirrorlist
+}
+
+chroot_umount () {
+	umount "${working_dir}/proc"
+	umount "${working_dir}/sys"
+	umount "${working_dir}/dev/pts"
+	umount "${working_dir}/dev/shm"
+	umount "${working_dir}/dev"
+	umount "${working_dir}/${cache_dir}"
+	[ -n "${host_mirror_path}" ] && umount "${working_dir}/${host_mirror_path}"
+}
+
+chroot_lock () {
+	# Only reopen the FD if it wasn't handed to us
+	if [ "$(readlink -f /dev/fd/9)" != "${working_dir}.lock" ]; then
+	  exec 9>"${working_dir}.lock"
+	fi
+
+	# Lock the chroot. Take note of the FD number.
+	if ! flock -n 9; then
+		echo -n "locking chroot..."
+		flock 9
+		echo "done"
+	fi
+}
+# }}}
+
+umask 0022
+if [ "$RUN" != "" ]; then
+	# run chroot {{{
+	#Sanity check
+	if [ ! -f "${working_dir}/.arch-chroot" ]; then
+		echo "error: '${working_dir}' does not appear to be a Arch chroot"
+		echo '       please build the image using mkarchroot'
+		exit 1
+	fi
+
+	chroot_lock
+	chroot_mount
+	copy_hostconf
+
+	eval chroot "${working_dir}" ${RUN}
+
+	# }}}
+else
+	# {{{ build chroot
+	if [ -e "${working_dir}" -a "${FORCE}" = "n" ]; then
+		echo "error: working dir '${working_dir}' already exists - try using -f"
+		exit 1
+	fi
+
+	if { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then
+		chmod 0755 "${working_dir}"
+	fi
+
+	mkdir -p "${working_dir}/var/lib/pacman/sync"
+	mkdir -p "${working_dir}/etc/"
+
+	chroot_lock
+	chroot_mount
+
+	pacargs="--noconfirm --root=${working_dir} --cachedir=${cache_dir}"
+	if [ "$pac_conf" != "" ]; then
+		pacargs="$pacargs --config=${pac_conf}"
+	fi
+
+	if [ $# -ne 0 ]; then
+		op='-Sy'
+		if [ "$FORCE" = "y" ]; then
+			op="${op}f"
+		fi
+		if ! pacman ${op} ${pacargs} $@; then
+			echo 'error: failed to install all packages'
+			exit 1
+		fi
+	fi
+
+	if [ -d "${working_dir}/lib/modules" ]; then
+		ldconfig -r "${working_dir}"
+	fi
+
+	if [ "$pac_conf" != "" -a "$NOCOPY" = "n" ]; then
+		cp ${pac_conf} ${working_dir}/etc/pacman.conf
+	fi
+
+	if [ "$makepkg_conf" != "" -a "$NOCOPY" = "n" ]; then
+		cp ${makepkg_conf} ${working_dir}/etc/makepkg.conf
+	fi
+
+	if [ -e "${working_dir}/etc/locale.gen" ]; then
+		sed -i 's@^#\(en_US\|de_DE\)\(\.UTF-8\)@\1\2@' "${working_dir}/etc/locale.gen"
+		chroot "${working_dir}" locale-gen
+	fi
+
+	if [ ! -e "${working_dir}/.arch-chroot" ]; then
+		date +%s > "${working_dir}/.arch-chroot"
+	fi
+	# }}}
+fi