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# ProteanOS architecture detection and feeds lists.
#
# Copyright (C) 2013, 2014  Patrick "P. J." McDermott
#
# This file is part of the ProteanOS Development Kit.
#
# The ProteanOS Development Kit 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.
#
# The ProteanOS Development Kit 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 the ProteanOS Development Kit.  If not, see
# <http://www.gnu.org/licenses/>.

use opkg

# TODO: This should be replaced with a prof_proteanos_validate_archplat()
# function that gets valid architectures and platforms from the package archive
# (which pro-archman needs to list in the distribution).
prof_proteanos_archplats='
amd64-linux-glibc                       dev
i686-linux-glibc                        dev
i686-linux-glibc                        ao751h
i686-linux-glibc                        dimension2400
i686-linux-glibc                        x60
'
prof_proteanos_fstab_linux="\
proc   /proc    proc   defaults
sys    /sys     sysfs  defaults
/dev   /dev     none   bind
devpts /dev/pts devpts noexec,nosuid,gid=5,mode=0620
"
prof_proteanos_install_service=\
'#!/bin/sh /etc/rc.common

start()
{
	log "Configuring packages"
	printf "disabled\n" >/etc/rc.policy
	opkg install $(opkg list-installed | cut -d " " -f 1)
	printf "enabled\n" >/etc/rc.policy
	rm "${SCRIPT}"
}
'

prof_proteanos_normalize_suite()
{
	local suite="${1}"

	case "${suite}" in
		*/*) printf '%s\n' "${suite}";;
		*)   printf 'dev/%s\n' "${suite}";;
	esac

	return 0
}

prof_proteanos_detect_arch()
{
	local uname_m=
	local uname_s=
	local arch=

	uname_m="$( (uname -m) 2>/dev/null)" || uname_m='unknown'
	uname_s="$( (uname -s) 2>/dev/null)" || uname_s='unknown'

	case "${uname_m}:${uname_s}" in
		'x86_64:Linux')
			arch='amd64-linux-glibc'
			;;
		'i686:Linux')
			arch='i686-linux-glibc'
			;;
		*)
			arch=''
	esac

	printf '%s\n' "${arch}"
}

prof_proteanos_default_plat()
{
	printf 'dev\n'
}

prof_proteanos_select_mirror()
{
	local rand=
	local mirror=

	rand=$(date '+%S')
	rand=$(($rand % 3))
	case ${rand} in
		0)
			mirror='http://us.mirror.gnu.dk/pub/proteanos'
			;;
		1)
			mirror='http://eu.mirror.gnu.dk/pub/proteanos'
			;;
		2)
			mirror='http://mirror.oss.maxcdn.com/proteanos'
			;;
	esac

	printf '%s\n' "${mirror}"
}

prof_proteanos_feeds()
{
	local mirror="${1}"
	local arch="${2}"
	local plat="${3}"
	local suite="${4}"
	local a=
	local p=
	local s=
	
	for a in "${arch}" 'all'; do
		for p in "${plat}" 'all'; do
			for s in 'base'; do
				printf 'src proteanos_%s_%s_%s_%s_%s ' \
					"${suite%/*}" "${suite#*/}" \
					"${a}" "${p}" "${s}"
				printf '%s/feeds/%s/%s/%s/%s/Packages\n' \
					"${mirror}" "${suite}" \
					"${a}" "${p}" "${s}"
			done
		done
	done

	for s in 'base'; do
		printf 'src proteanos_%s_%s_%s_%s_%s ' \
			"${suite%/*}" "${suite#*/}" \
			'src' 'all' "${s}"
		printf '%s/feeds/%s/%s/%s/%s/Packages\n' \
			"${mirror}" "${suite}" \
			'src' 'all' "${s}"
	done
}

prof_proteanos_dep_fields()
{
	printf 'Depends Pre-Depends'
}

prof_proteanos_include_pkg()
{
	local name="${1}"
	local value="${2}"

	if [ "x${name}" = 'xessential' ]; then
		if [ "x${value}" = 'xyes' ]; then
			return 0
		fi
	fi

	return 1
}

prof_proteanos_get_fstab()
{
	local arch="${1}"
	local plat="${2}"

	case "${arch}" in
		*-linux-*)
			printf '%s\n' "${prof_proteanos_fstab_linux}"
			;;
	esac
}

prof_proteanos_configure_system_native()
{
	local root="${1}"

	printf 'disabled\n' >"${root}/etc/rc.policy"
	opkg_install_all "${root}"
	printf 'enabled\n' >"${root}/etc/rc.policy"
	[ -r /etc/resolv.conf ] && cp /etc/resolv.conf "${root}/etc"
	[ -r /etc/hostname ] && cp /etc/hostname "${root}/etc"
	[ -e "${root}/etc/passwd" ] || printf \
		'root::0:0:root:/root:/bin/sh\n' >"${root}/etc/passwd"
}

prof_proteanos_configure_system_foreign()
{
	local root="${1}"

	printf '%s' "${prof_proteanos_install_service}" >"${root}/etc/rc.d/S10install"
	chmod 0755 "${root}/etc/rc.d/S10install"
	printf 'proteanos\n' >"${root}/etc/hostname"
	[ -e "${root}/etc/passwd" ] || printf \
		'root::0:0:root:/root:/bin/sh\n' >"${root}/etc/passwd"
}