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# ProteanOS Development Kit
# lib/cmd/install.sh
# "install" command
#
# Copyright (C) 2013  Patrick "P. J." McDermott
#
# 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/>.

use getopt
use feed
use profile
use fd

cmd_install_optstring='a:P:m:'

cmd_install_main()
{
	local suite=
	local chroot=
	local arch=
	local plat=
	local profile=
	local mirror=

	get_options "${@}"
	shift $(($OPTIND - 1))

	if [ ${#} -lt 2 ]; then
		print_cmd_usage 'install' >&2
		exit 1
	fi

	suite="${1}"
	chroot="${2}"

	if [ "x${suite%%:*}" != "x${suite}" ]; then
		profile="${suite%%:*}"
		suite="${suite#*:}"
	else
		profile='proteanos'
	fi
	profile_set "${profile}"
	suite="$(profile_normalize_suite "${suite}")"

	if [ "x${cmd_install_opt_a+set}" = 'xset' ]; then
		arch="${cmd_install_opt_a}"
	else
		arch="$(profile_detect_arch)"
	fi
	if [ "x${cmd_install_opt_P+set}" = 'xset' ]; then
		plat="${cmd_install_opt_P}"
	else
		plat="$(profile_default_plat)"
	fi
	if ! profile_validate_archplat "${arch}" "${plat}"; then
		error 2 "$(get_msg 'cmd_install_bad_archplat')" \
			"${arch}" "${plat}"
	fi
	info "$(get_msg 'cmd_install_selected_arch')" "${arch}"
	info "$(get_msg 'cmd_install_selected_plat')" "${plat}"

	if [ "x${cmd_install_opt_m+set}" = 'xset' ]; then
		mirror="${cmd_install_opt_m}"
	else
		mirror="$(profile_select_mirror)"
	fi
	info "$(get_msg 'cmd_install_selected_mirror')" "${mirror}"

	info "$(get_msg 'cmd_install_setting_up_chroot')"
	if [ -d "${chroot}" ]; then
		error 2 "$(get_msg 'cmd_install_chroot_dir_exists')" "${chroot}"
	fi
	if ! mkdir "${chroot}" || ! mkdir "${chroot}/.prokit"; then
		error 2 "$(get_msg 'cmd_install_mkdir_chroot_fail')" "${chroot}"
	fi

	info "$(get_msg 'cmd_install_find_pkgs')"
	cmd_install_find_pkgs "${mirror}" "${suite}" "${arch}" "${plat}" \
		"${chroot}"
}

cmd_install_find_pkgs()
{
	local mirror="${1}"
	local suite="${2}"
	local arch="${3}"
	local plat="${4}"
	local chroot="${5}"
	local opkg_conf_fd=
	local feed_idx=
	local feed=

	mkdir -p "${chroot}/etc/opkg" "${chroot}/var/lib/opkg/lists"
	fopen "${chroot}/etc/opkg/opkg.conf" 'w'
	opkg_conf_fd=${FD}

	while read -r feed_idx feed; do
		printf 'src %s %s\n' "${feed_idx}" "${feed}" >&${opkg_conf_fd}
		feed_download "${feed}" \
			>"${chroot}/var/lib/opkg/lists/${feed_idx}"
		feed_find_pkgs "${chroot}/var/lib/opkg/lists/${feed_idx}" \
			"$(profile_dep_fields)" 'profile_include_pkg' \
			"${chroot}/.prokit/${feed_idx}.depends" \
			"${chroot}/.prokit/${feed_idx}.filenames" \
			>>"${chroot}/.prokit/packages"
	done <<-EOF
		$(profile_feeds "${mirror}" "${arch}" "${plat}" "${suite}")
		EOF

	printf '\ndest root /\n' >&${opkg_conf_fd}
	printf 'arch %s 1\n' 'all' "${arch}" 'src' >&${opkg_conf_fd}
	fclose ${opkg_conf_fd}
}