install-pkgs

#!/bin/sh -eu

. $BULB_SH_UTILS

usage() {
	echo "
Usage: ${0##*/} [options] package[-]...
If a hyphen (-) is appended to the package name (with no intervening space), the identified package will not be installed.
options:
        -a The package architecture
        -r The installation root directory
        -h Print this help and exit
"
}

fix_broken_link() {
	l_link=$1
	l_root_dir=$2
	l_target=$(readlink $l_link)
	echo $l_target |grep -q '^/' || {
		bark Unable to fix link $l_link -> $l_target
		return
	}
	l_new_target=$(echo $l_target |sed "s%^/%$l_root_dir/%g")
	ln -srf $l_new_target $l_link
}

fix_broken_links() {
	l_root_dir=$1
	find "$l_root_dir" -xtype l -print |while read -r broken_link; do
		fix_broken_link $broken_link $l_root_dir
	done
}

# Usage: ignore_dependencies deb_cache_dir package...
ignore_dependencies() {
	l_deb_cache=${1:-}
	[ -n "$l_deb_cache" ] || croak The deb cache path parameter is missing
	[ -d "$l_deb_cache" ] || croak $l_deb_cache is not a directory
	shift
	cd $l_deb_cache
	[ -d archives ] || install -d archives
	cd archives
	for l_dep in $*; do
		l_dep_version=$(apt-cache show $l_dep |sed -n 's/Version: \(.*\)/\1/p')
		equivs-control $l_dep.control
		sed -i  -e "s/<package name; defaults to equivs-dummy>/$l_dep/g" \
				-e "s/# Version: <enter version here; defaults to 1.0>/Version: $l_dep_version/g" $l_dep.control
		equivs-build $l_dep.control >/dev/null 2>&1
		dpkg -i ${l_dep}_${l_dep_version}_all.deb >/dev/null
		rm $l_dep.control
	done
}

root_dir=
arch=
while getopts 'a:r:h' opt; do
	case $opt in
	a)
		arch=$OPTARG
		;;
	r)
		root_dir=$OPTARG
		;;
	h)
		usage
		exit
		;;
	*)
		usage
		exit 1
		;;
	esac
done

[ -n "$arch" ] || {
	usage
	exit 1
}

shift $((OPTIND - 1))

[ $# -gt 0 ] || {
	usage
	exit 1
}

root_dir=${root_dir:-$(mktemp -d)}
root_dir=$(get_absolut_path($root_dir))

[ -d "$root_dir" ] || install -d $root_dir 2>/dev/null || echo $root_dir is not a directory

cd "$root_dir"

dpkg_backup=$(mktemp -d)

mv /var/lib/dpkg $dpkg_backup

if [ -d "$root_dir/var/lib/dpkg" ]; then
	cp -r "$root_dir/var/lib/dpkg" /var/lib/dpkg
else
	rm -rf /var/lib/dpkg
	mkdir -p /var/lib/dpkg/info
	touch /var/lib/dpkg/status
fi

echo $arch >>/var/lib/dpkg/arch

ignore=
install=
for deb in $*; do
	case $deb in
	*-)
		ignore=${ignore:+$ignore }${deb%%-}
		;;
	*)
		install=${install:+$install }$deb
		;;
	esac
done

deb_cache=$(mktemp -d)
install -d $deb_cache
ignore_dependencies $deb_cache $ignore

apt-get -q=2 update -o=APT::Architecture=$arch
apt-get -q=2 --fix-broken install -o=APT::Architecture=$arch -y --allow-remove-essential
apt-get -q=2 install --download-only -o=dir::cache=$deb_cache -o=APT::Architecture=$arch -y --no-install-recommends $install
apt-get -q=2 clean

install -d "$root_dir"
for f in $deb_cache/archives/*.deb; do
	dpkg -x $f "$root_dir" >/dev/null;
done

fix_broken_links "$root_dir"

dpkg --record-avail -R $deb_cache/archives >/dev/null

rm -rf "$root_dir/var/lib/dpkg"
install -d "$root_dir/var/lib"
mv /var/lib/dpkg "$root_dir/var/lib"
mv $dpkg_backup/dpkg /var/lib
rm -rf $dpkg_backup $deb_cache

echo $root_dir