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# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/savedconfig.eclass,v 1.3 2007/02/05 09:55:22 dragonheart Exp $
# Original Author: Daniel Black <dragonheart@gentoo.org>
#
# Purpose: Define an interface for ebuilds to save and restore
# complex configuration that may be edited by users.
#
# Thanks to Mike Frysinger <vapier@gentoo.org> for the suggestions.
inherit portability
IUSE="savedconfig"
# save_config
#
# Saves the files and/or directories to
# /etc/portage/savedconfig/${CATEGORY}/${PF}
#
# If a single file is specified ${PF} is that file else it is a directory
# containing all specified files and directories.
#
save_config() {
if [[ ${EBUILD_PHASE} != "install" ]]; then
die "Bad package! save_config only for use in src_install functions!"
fi
case $# in
0) die "Tell me what to save"
;;
1) if [[ -f "$1" ]]; then
dodir /etc/portage/savedconfig/${CATEGORY}
cp "$1" "${D}"/etc/portage/savedconfig/${CATEGORY}/${PF} \
|| die "Failed to save $1"
else
dodir /etc/portage/savedconfig/${CATEGORY}/${PF}
treecopy "$1" "${D}"/etc/portage/savedconfig/${CATEGORY}/${PF} \
|| die "Failed to save $1"
fi
;;
*)
dodir "${PORTAGE_CONFIGROOT}"/etc/portage/savedconfig/${CATEGORY}/${PF}
treecopy $* "${D}/${PORTAGE_CONFIGROOT}"/etc/portage/savedconfig/${CATEGORY}/${PF} \
|| die "Failed to save $1"
esac
}
# restore_config
#
# Restores the configuation saved ebuild previously potentially with user edits
#
# Requires the name of the file to restore to if a single file was given to
# save_config. Otherwise it restores the directory structure.
#
# Looks for config files in the following order.
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CTARGET}/${CATEGORY}/${PF}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CHOST}/${CATEGORY}/${PF}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${PF}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CTARGET}/${CATEGORY}/${P}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CHOST}/${CATEGORY}/${P}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${P}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CTARGET}/${CATEGORY}/${PN}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CHOST}/${CATEGORY}/${PN}
# ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${PN}
#
#
restore_config() {
use savedconfig || return
case ${EBUILD_PHASE} in
unpack|compile)
;;
*) die "Bad package! restore_config only for use in src_unpack or src_compile functions!"
;;
esac
local found;
local base=${PORTAGE_CONFIGROOT}/etc/portage/savedconfig
for check in {${CATEGORY}/${PF},${CATEGORY}/${P},${CATEGORY}/${PN}}; do
configfile=${base}/${CTARGET}/${check}
[[ -r ${configfile} ]] || configfile=${base}/${CHOST}/${check}
[[ -r ${configfile} ]] || configfile=${base}/${check}
einfo "Checking existence of ${configfile} ..."
if [[ -r "${configfile}" ]]; then
einfo "found ${configfile}"
found=${configfile};
break;
fi
done
if [[ -f ${found} ]]; then
if [ $# -gt 0 ]; then
cp -pPR "${found}" "$1" || die "Failed to restore ${found} to $1"
else
die "need to know the restoration filename"
fi
elif [[ -d ${found} ]]; then
dest=${PWD}
pushd "${found}"
treecopy . "${dest}" \
|| die "Failed to restore ${found} to $1"
popd
elif [[ -a {found} ]]; then
die "do not know how to handle non-file/directory ${found}"
else
eerror "No saved config to restore - please remove USE=saveconfig or"
die "provide a configuration file in ${PORTAGE_CONFIGROOT}/etc/portage/savedconfig/${CATEGORY}/${PN}"
fi
}
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