vala.eclass added with MAX_API_VERSION=0.38
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# Copyright 1999-2015 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: vala.eclass
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# @MAINTAINER:
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# gnome@gentoo.org
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# @AUTHOR:
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# Alexandre Rostovtsev <tetromino@gentoo.org>
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# @BLURB: Sets up the environment for using a specific version of vala.
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# @DESCRIPTION:
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# This eclass sets up commonly used environment variables for using a specific
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# version of dev-lang/vala to configure and build a package. It is needed for
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# packages whose build systems assume the existence of certain unversioned vala
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# executables, pkgconfig files, etc., which Gentoo does not provide.
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#
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# This eclass provides one phase function: src_prepare.
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inherit eutils multilib
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case "${EAPI:-0}" in
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0) die "EAPI=0 is not supported" ;;
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1) ;;
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*) EXPORT_FUNCTIONS src_prepare ;;
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esac
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# @ECLASS-VARIABLE: VALA_MIN_API_VERSION
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# @DESCRIPTION:
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# Minimum vala API version (e.g. 0.32).
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VALA_MIN_API_VERSION=${VALA_MIN_API_VERSION:-0.32}
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# @ECLASS-VARIABLE: VALA_MAX_API_VERSION
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# @DESCRIPTION:
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# Maximum vala API version (e.g. 0.32).
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VALA_MAX_API_VERSION=${VALA_MAX_API_VERSION:-0.38}
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# @ECLASS-VARIABLE: VALA_USE_DEPEND
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# USE dependencies that vala must be built with (e.g. vapigen).
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# @FUNCTION: vala_api_versions
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# @DESCRIPTION:
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# Outputs a list of vala API versions from VALA_MAX_API_VERSION down to
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# VALA_MIN_API_VERSION.
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vala_api_versions() {
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[[ ${VALA_MIN_API_VERSION} =~ ^0\.[[:digit:]]+$ ]] || die "Invalid syntax of VALA_MIN_API_VERSION"
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[[ ${VALA_MAX_API_VERSION} =~ ^0\.[[:digit:]]+$ ]] || die "Invalid syntax of VALA_MAX_API_VERSION"
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local minimal_supported_minor_version minor_version
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# Dependency atoms are not generated for Vala versions older than 0.${minimal_supported_minor_version}.
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minimal_supported_minor_version="32"
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for ((minor_version = ${VALA_MAX_API_VERSION#*.}; minor_version >= ${VALA_MIN_API_VERSION#*.}; minor_version = minor_version - 2)); do
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if ((minor_version >= minimal_supported_minor_version)); then
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echo "0.${minor_version}"
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fi
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done
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}
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# @FUNCTION: vala_depend
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# @DESCRIPTION:
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# Outputs a ||-dependency string on vala from VALA_MAX_API_VERSION down to
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# VALA_MIN_API_VERSION
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vala_depend() {
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local u v versions=$(vala_api_versions)
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[[ ${VALA_USE_DEPEND} ]] && u="[${VALA_USE_DEPEND}(+)]"
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echo -n "|| ("
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for v in ${versions}; do
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echo -n " dev-lang/vala:${v}${u}"
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done
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echo " )"
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}
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# @FUNCTION: vala_best_api_version
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# @DESCRIPTION:
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# Returns the highest installed vala API version satisfying
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# VALA_MAX_API_VERSION, VALA_MIN_API_VERSION, and VALA_USE_DEPEND.
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vala_best_api_version() {
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local u v
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[[ ${VALA_USE_DEPEND} ]] && u="[${VALA_USE_DEPEND}(+)]"
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for v in $(vala_api_versions); do
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has_version "dev-lang/vala:${v}${u}" && echo "${v}" && return
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done
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}
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# @FUNCTION: vala_src_prepare
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# @USAGE: [--ignore-use] [--vala-api-version api_version]
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# @DESCRIPTION:
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# Sets up the environment variables and pkgconfig files for the
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# specified API version, or, if no version is specified, for the
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# highest installed vala API version satisfying
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# VALA_MAX_API_VERSION, VALA_MIN_API_VERSION, and VALA_USE_DEPEND.
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# Is a no-op if called without --ignore-use when USE=-vala.
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# Dies if the USE check is passed (or ignored) and a suitable vala
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# version is not available.
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vala_src_prepare() {
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local p d valafoo version ignore_use
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while [[ $1 ]]; do
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case $1 in
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"--ignore-use" )
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ignore_use=1 ;;
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"--vala-api-version" )
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shift
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version=$1
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[[ ${version} ]] || die "'--vala-api-version' option requires API version parameter."
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esac
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shift
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done
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if [[ -z ${ignore_use} ]]; then
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in_iuse vala && ! use vala && return 0
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fi
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if [[ ${version} ]]; then
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has_version "dev-lang/vala:${version}" || die "No installed vala:${version}"
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else
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version=$(vala_best_api_version)
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[[ ${version} ]] || die "No installed vala in $(vala_depend)"
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fi
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export VALAC=$(type -P valac-${version})
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valafoo=$(type -P vala-gen-introspect-${version})
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[[ ${valafoo} ]] && export VALA_GEN_INTROSPECT="${valafoo}"
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valafoo=$(type -P vapigen-${version})
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[[ ${valafoo} ]] && export VAPIGEN="${valafoo}"
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valafoo="${EPREFIX}/usr/share/vala/Makefile.vapigen"
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[[ -e ${valafoo} ]] && export VAPIGEN_MAKEFILE="${valafoo}"
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export VAPIGEN_VAPIDIR="${EPREFIX}/usr/share/vala/vapi"
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mkdir -p "${T}/pkgconfig" || die "mkdir failed"
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for p in libvala vapigen; do
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for d in "${EPREFIX}/usr/$(get_libdir)/pkgconfig" "${EPREFIX}/usr/share/pkgconfig"; do
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if [[ -e ${d}/${p}-${version}.pc ]]; then
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ln -s "${d}/${p}-${version}.pc" "${T}/pkgconfig/${p}.pc" || die "ln failed"
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break
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fi
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done
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done
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: ${PKG_CONFIG_PATH:="${EPREFIX}/usr/$(get_libdir)/pkgconfig:${EPREFIX}/usr/share/pkgconfig"}
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export PKG_CONFIG_PATH="${T}/pkgconfig:${PKG_CONFIG_PATH}"
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}
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