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199 lines
4.9 KiB
199 lines
4.9 KiB
5 years ago
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# Copyright 2019 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: llvm.org.eclass
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# @MAINTAINER:
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# Michał Górny <mgorny@gentoo.org>
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# @AUTHOR:
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# Michał Górny <mgorny@gentoo.org>
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# @BLURB: Common bits for fetching & unpacking llvm.org projects
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# @DESCRIPTION:
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# The llvm.org eclass provides common code to fetch and unpack parts
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# of the llvm.org project tree. It takes care of handling both git
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# checkouts and source tarballs, making it possible to unify the code
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# of live and release ebuilds and effectively reduce the work needed
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# to package new releases/RCs/branches.
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#
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# In order to use this eclass, the ebuild needs to declare
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# LLVM_COMPONENTS and then call llvm.org_set_globals. If tests require
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# additional components, they need to be listed in LLVM_TEST_COMPONENTS.
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# The eclass exports an implementation of src_unpack() phase.
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#
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# Example:
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# @CODE
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# inherit llvm.org
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#
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# LLVM_COMPONENTS=( lld )
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# LLVM_TEST_COMPONENTS=( llvm/utils/lit )
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# llvm.org_set_globals
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# @CODE
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case "${EAPI:-0}" in
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7)
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;;
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*)
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die "Unsupported EAPI=${EAPI} for ${ECLASS}"
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;;
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esac
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# == internal control bits ==
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# @ECLASS-VARIABLE: _LLVM_MASTER_MAJOR
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# @INTERNAL
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# @DESCRIPTION:
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# The major version of current LLVM trunk. Used to determine
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# the correct branch to use.
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_LLVM_MASTER_MAJOR=10
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# @ECLASS-VARIABLE: _LLVM_SOURCE_TYPE
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# @INTERNAL
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# @DESCRIPTION:
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# Source type to use: 'git' or 'tar'.
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if [[ -z ${_LLVM_SOURCE_TYPE+1} ]]; then
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if [[ ${PV} == *.9999 ]]; then
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_LLVM_SOURCE_TYPE=git
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else
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_LLVM_SOURCE_TYPE=tar
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fi
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fi
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[[ ${_LLVM_SOURCE_TYPE} == git ]] && inherit git-r3
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[[ ${PV} == ${_LLVM_MASTER_MAJOR}.* && ${_LLVM_SOURCE_TYPE} == tar ]] &&
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die "${ECLASS}: Release ebuild for master branch?!"
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# == control variables ==
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# @ECLASS-VARIABLE: LLVM_COMPONENTS
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# @REQUIRED
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# @DESCRIPTION:
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# List of components needed unconditionally. Specified as bash array
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# with paths relative to llvm-project git. Automatically translated
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# for tarball releases.
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#
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# The first path specified is used to construct default S.
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# @ECLASS-VARIABLE: LLVM_TEST_COMPONENTS
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# List of additional components needed for tests.
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# == global scope logic ==
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# @FUNCTION: _llvm.org_get_archives
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# @USAGE: <components>
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# @INTERNAL
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# @DESCRIPTION:
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# Set 'archives' array to list of unique archive filenames
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# for components passed as parameters.
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_llvm.org_get_archives() {
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local c
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archives=()
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for c; do
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local cn=${c%%/*}
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case ${cn} in
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clang) cn=cfe;;
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esac
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local a=${cn}-${PV}.src.tar.xz
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has "${a}" "${archives[@]}" || archives+=( "${a}" )
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done
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}
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# @FUNCTION: llvm.org_set_globals
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# @DESCRIPTION:
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# Set global variables. This must be called after setting LLVM_*
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# variables used by the eclass.
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llvm.org_set_globals() {
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if [[ $(declare -p LLVM_COMPONENTS) != "declare -a"* ]]; then
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die 'LLVM_COMPONENTS must be an array.'
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fi
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if declare -p LLVM_TEST_COMPONENTS &>/dev/null; then
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if [[ $(declare -p LLVM_TEST_COMPONENTS) != "declare -a"* ]]; then
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die 'LLVM_TEST_COMPONENTS must be an array.'
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fi
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fi
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if [[ ${_LLVM_SOURCE_TYPE} == git ]]; then
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EGIT_REPO_URI="https://github.com/llvm/llvm-project.git"
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[[ ${PV} != ${_LLVM_MASTER_MAJOR}.* ]] &&
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EGIT_BRANCH="release/${PV%%.*}.x"
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elif [[ ${_LLVM_SOURCE_TYPE} == tar ]]; then
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local a archives=()
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_llvm.org_get_archives "${LLVM_COMPONENTS[@]}"
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for a in "${archives[@]}"; do
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SRC_URI+="
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https://releases.llvm.org/${PV}/${a}"
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done
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else
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die "Invalid _LLVM_SOURCE_TYPE: ${LLVM_SOURCE_TYPE}"
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fi
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S=${WORKDIR}/${LLVM_COMPONENTS[0]}
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if [[ -n ${LLVM_TEST_COMPONENTS+1} ]]; then
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IUSE+=" test"
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RESTRICT+=" !test? ( test )"
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if [[ ${_LLVM_SOURCE_TYPE} == tar ]]; then
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SRC_URI+="
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test? ("
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_llvm.org_get_archives "${LLVM_TEST_COMPONENTS[@]}"
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for a in "${archives[@]}"; do
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SRC_URI+="
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https://releases.llvm.org/${PV}/${a}"
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done
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SRC_URI+="
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)"
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fi
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fi
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_LLVM_ORG_SET_GLOBALS_CALLED=1
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}
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# == phase functions ==
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EXPORT_FUNCTIONS src_unpack
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# @FUNCTION: llvm.org_src_unpack
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# @DESCRIPTION:
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# Unpack or checkout requested LLVM components.
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llvm.org_src_unpack() {
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if [[ ! ${_LLVM_ORG_SET_GLOBALS_CALLED} ]]; then
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die "llvm.org_set_globals must be called in global scope"
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fi
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local components=( "${LLVM_COMPONENTS[@]}" )
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if [[ ${LLVM_TEST_COMPONENTS+1} ]] && use test; then
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components+=( "${LLVM_TEST_COMPONENTS[@]}" )
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fi
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if [[ ${_LLVM_SOURCE_TYPE} == git ]]; then
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git-r3_fetch
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git-r3_checkout '' . '' "${components[@]}"
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else
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local c archives
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# TODO: optimize this
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for c in "${components[@]}"; do
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local top_dir=${c%%/*}
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_llvm.org_get_archives "${c}"
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local sub_path=${archives[0]%.tar.xz}
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[[ ${c} == */* ]] && sub_path+=/${c#*/}
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ebegin "Unpacking ${sub_path} from ${archives[0]}"
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mkdir -p "${top_dir}" || die
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tar -C "${top_dir}" -x -J -o --strip-components 1 \
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-f "${DISTDIR}/${archives[0]}" "${sub_path}" || die
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eend
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done
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fi
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}
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