Revised proposal with suggestions from Nirbheek. VALA_API_VERSION has
been split into max and min to make it easier for packages to depend on
a range of vala slots.
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
# @ECLASS: vala.eclass
# @MAINTAINER:
# gn...@gentoo.org
# @AUTHOR:
# Alexandre Rostovtsev <tetrom...@gentoo.org>
# @BLURB: Sets up the environment for using a specific version of vala.
# @DESCRIPTION:
# This eclass sets up commonly used environment variables for using a specific
# version of dev-lang/vala to configure and build a package. It is needed for
# packages whose build systems assume the existence of certain unversioned vala
# executables, pkgconfig files, etc., which Gentoo does not provide.
#
# This eclass provides one phase function: src_prepare.
inherit multilib
case "${EAPI:-0}" in
0) die "EAPI=0 is not supported" ;;
1) ;;
*) EXPORT_FUNCTIONS src_prepare ;;
esac
# @ECLASS-VARIABLE: VALA_MIN_API_VERSION
# @DEFAULT_UNSET
# @DESCRIPTION:
# Minimum vala API version (e.g. 0.16).
VALA_MIN_API_VERSION=${VALA_MIN_API_VERSION:-0.10}
# @ECLASS-VARIABLE: VALA_MAX_API_VERSION
# @DEFAULT_UNSET
# @DESCRIPTION:
# Maximum vala API version (e.g. 0.18).
VALA_MAX_API_VERSION=${VALA_MAX_API_VERSION:-0.18}
# @ECLASS-VARIABLE: VALA_USE_DEPEND
# @DEFAULT_UNSET
# @DESCRIPTION:
# USE dependencies that vala must be built with (e.g. vapigen).
# @FUNCTION: vala_api_versions
# @DESCRIPTION:
# Outputs a list of vala API versions from VALA_MAX_API_VERSION down to
# VALA_MIN_API_VERSION.
vala_api_versions() {
eval "echo
0.{${VALA_MAX_API_VERSION#0.}..${VALA_MIN_API_VERSION#0.}..2}"
}
# @FUNCTION: vala_depend
# @DESCRIPTION:
# Outputs a ||-dependency string on vala from VALA_MAX_API_VERSION down to
# VALA_MIN_API_VERSION
vala_depend() {
local u v versions=$(vala_api_versions)
[[ ${VALA_USE_DEPEND} ]] && u="[${VALA_USE_DEPEND}]"
echo -n "|| ("
for v in ${versions}; do
echo -n " dev-lang/vala:${v}${u}"
done
echo " )"
}
# @FUNCTION: vala_best_api_version
# @DESCRIPTION:
# Returns the highest installed vala API version satisfying
# VALA_MAX_API_VERSION, VALA_MIN_API_VERSION, and VALA_USE_DEPEND.
vala_best_api_version() {
local u v
[[ ${VALA_USE_DEPEND} ]] && u="[${VALA_USE_DEPEND}]"
for v in $(vala_api_versions); do
has_version "dev-lang/vala:${v}${u}" && echo "${v}" && return
done
}
# @FUNCTION: vala_src_prepare
# @USAGE: [--vala-api-version api_version]
# @DESCRIPTION:
# Sets up the environment variables and pkgconfig files for the
# specified API version, or, if no version is specified, for the
# highest installed vala API version satisfying
# VALA_MIN_API_VERSION, VALA_MIN_API_VERSION, and VALA_USE_DEPEND.
vala_src_prepare() {
local p d valafoo version
if [[ $1 = "--vala-api-version" ]]; then
version=$2
[[ ${version} ]] || die "'--vala-api-version' option requires
API version parameter."
else
version=$(vala_best_api_version)
[[ ${version} ]] || die "No installed vala in $(vala_depend)"
fi
export VALAC=$(type -P valac-${version})
valafoo=$(type -P vala-gen-introspect-${VALA_API_VERSION})
[[ ${valafoo} ]] && export VALA_GEN_INTROSPECT=$(type -P
vala-gen-introspect-${version})
valafoo=$(type -P vapigen-${VALA_API_VERSION})
[[ ${valafoo} ]] && export VAPIGEN="${valafoo}"
valafoo="${EPREFIX}/usr/share/vala/Makefile.vapigen"
[[ -e ${valafoo} ]] && export VAPIGEN_MAKEFILE="${valafoo}"
export VAPIGEN_VAPIDIR="${EPREFIX}/usr/share/vala/vapi"
mkdir -p "${T}/pkgconfig" || die "mkdir failed"
for p in libvala vapigen; do
for d in "${EPREFIX}/usr/$(get_libdir)/pkgconfig"
"${EPREFIX}/usr/share/pkgconfig"; do
if [[ -e ${d}/${p}-${VALA_API_VERSION}.pc ]]; then
ln -s "${d}/${p}-${VALA_API_VERSION}.pc"
"${T}/pkgconfig/${p}.pc" || die "ln failed"
break
fi
done
done
:
${PKG_CONFIG_PATH:="${EPREFIX}/usr/$(get_libdir)/pkgconfig:${EPREFIX}/usr/share/pkgconfig"}
export PKG_CONFIG_PATH="${T}/pkgconfig:${PKG_CONFIG_PATH}"
}
