override.eclass

override.eclass (text/plain), 1.97 KB, created by Dani Church on 2006-06-01 10:08:46 UTC

# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

#
# Original Author: churchda
# Purpose: Allows overriding the behavior of default Gentoo ebuilds.
#

ECLASS="override"
INHERITED="$INHERITED $ECLASS"

for func in pkg_setup pkg_nofetch src_unpack src_compile src_install src_test pkg_preinst pkg_postinst pkg_prerm pkg_postrm pkg_config; do
	eval "override_`declare -f $func`"
done
unset func

EXPORT_FUNCTIONS pkg_setup pkg_nofetch src_unpack src_compile src_install src_test pkg_preinst pkg_postinst pkg_prerm pkg_postrm pkg_config

override_read_ebuild() {
	local pkgname=$OVERRIDE_CAT/$OVERRIDE_PKG
	local package=$OVERRIDE_PKG
	local line
	local IFS_save="$IFS"

	IFS=""
	{
		local overfuncs="`declare -f override_src_{unpack,compile,install,test} 2>/dev/null`"
		echo "${overfuncs//override_}"
		cat /usr/portage/$pkgname/$package-$PVR.ebuild
	} | while read line; do
		line="${line//{PN\}/{OVERRIDE_PN\\remove\}}"
		line="${line//{P\}/{OVERRIDE_P\\remove\}}"
		line="${line//{PF\}/{OVERRIDE_PF\\remove\}}"
		line="${line//\\remove\\}"
		line="${line//FILESDIR/OVERRIDE_FILESDIR}"
		line="${line//pkg_/override_pkg_}"
		line="${line//src_/override_src_}"
		echo "${line}"
	done
	IFS="${IFS_save}"
}

override_import_ebuild() {
	local pkgname=$OVERRIDE_CAT/$OVERRIDE_PKG

	OVERRIDE_PN=$package
	OVERRIDE_P=$OVERRIDE_PN-$PV
	OVERRIDE_PF=$OVERRIDE_PN-$PVR
	OVERRIDE_FILESDIR=/usr/portage/$pkgname/files

	local override_ebuild="`override_read_ebuild`"
	S="${WORKDIR}/${OVERRIDE_P}"
	eval "$override_ebuild"
}

override() {
	alongside "$@"
	RDEPEND="${RDEPEND}
		!$pkgname"
}

alongside() {
	local pkgname=$1
	local category=${pkgname%%/*}
	local package=${pkgname##*/}

	[ -d /usr/portage/$pkgname ] || die "override: $pkgname is not a valid package."
	[ -f /usr/portage/$pkgname/$package-$PVR.ebuild ] || die "override: $pkgname does not have an ebuild for version $PVR"
	OVERRIDE_CAT=$category
	OVERRIDE_PKG=$package

	override_import_ebuild
}