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# Copyright 1999-2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
# @ECLASS: prefix.eclass
# @MAINTAINER:
# Feel free to contact the Prefix team through <prefix@gentoo.org> if
# you have problems, suggestions or questions.
# @BLURB: Eclass to provide Prefix functionality
# @DESCRIPTION:
# Gentoo Prefix allows users to install into a self defined offset
# located somewhere in the filesystem. Prefix ebuilds require
# additional functions and variables which are defined by this eclass.
# @ECLASS-VARIABLE: EPREFIX
# @DESCRIPTION:
# The offset prefix of a Gentoo Prefix installation. When Gentoo Prefix
# is not used, ${EPREFIX} should be "". Prefix Portage sets EPREFIX,
# hence this eclass has nothing to do here in that case.
# Note that setting EPREFIX in the environment with Prefix Portage sets
# Portage into cross-prefix mode.
if [[ ! ${EPREFIX+set} ]]; then
export EPREFIX=''
fi
# @FUNCTION: eprefixify
# @USAGE: <list of to be eprefixified files>
# @DESCRIPTION:
# replaces @GENTOO_PORTAGE_EPREFIX@ with ${EPREFIX} for the given files,
# tries a set of heuristics if @GENTOO_PORTAGE_EPREFIX@ is not found,
# dies if no arguments are given, a file does not exist, or changing a
# file failed.
eprefixify() {
[[ $# -lt 1 ]] && die "at least one argument required"
einfo "Adjusting to prefix ${EPREFIX:-/}"
local x
for x in "$@" ; do
if [[ -e ${x} ]] ; then
ebegin " ${x##*/}"
if grep -q @GENTOO_PORTAGE_EPREFIX@ "${x}" ; then
sed -i -e "s|@GENTOO_PORTAGE_EPREFIX@|${EPREFIX}|g" "${x}"
else
sed -r \
-e "s,([^[:alnum:]}])/(usr|etc|bin|sbin|var|opt)/,\1${EPREFIX}/\2/,g" \
-i "${x}"
fi
eend $? || die "failed to eprefixify ${x}"
else
die "${x} does not exist"
fi
done
return 0
}
# @FUNCTION: __temp_prefixify
# @USAGE: on a single file
# @DESCRIPTION:
# copies the files to ${T}, calls eprefixify, echos the new file.
__temp_prefixify() {
if [[ -e $1 ]] ; then
local f=${1##*/}
cp "$1" "${T}" || die "failed to copy file"
eprefixify "${T}"/${f} > /dev/null
echo "${T}"/${f}
else
die "$1 does not exist"
fi
}
# @FUNCTION: fprefixify
# @USAGE: fprefixfy function files
# @DESCRIPTION:
# prefixify a function call.
# copies the files to ${T}, calls eprefixify, and calls the function.
#
# For example:
# fprefixify doexe ${FILESDIR}/fix_libtool_files.sh
# fprefixify epatch ${FILESDIR}/${PN}-4.0.2-path.patch
fprefixify() {
[[ $# -lt 2 ]] && die "at least two arguments required"
local func=$1 f
einfo "Adjusting ${func} to prefix ${EPREFIX:-/}"
shift
case ${func} in
new*)
[[ $# -ne 2 ]] && die "${func} takes two arguments"
ebegin " ${1##*/}"
f=$(__temp_prefixify "$1")
${func} "${f}" "$2"
eend $? || die "failed to execute ${func}"
;;
*)
for x in "$@" ; do
ebegin " ${x##*/}"
f=$(__temp_prefixify "${x}")
${func} "${f}"
eend $? || die "failed to execute ${func}"
done
esac
return 0
}
# vim: tw=72:
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