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Diffstat (limited to 'eclass/llvm.org.eclass')
| -rw-r--r-- | eclass/llvm.org.eclass | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/eclass/llvm.org.eclass b/eclass/llvm.org.eclass new file mode 100644 index 000000000000..5a704c1d9805 --- /dev/null +++ b/eclass/llvm.org.eclass @@ -0,0 +1,198 @@ +# Copyright 2019 Gentoo Authors +# Distributed under the terms of the GNU General Public License v2 + +# @ECLASS: llvm.org.eclass +# @MAINTAINER: +# Michał Górny <mgorny@gentoo.org> +# @AUTHOR: +# Michał Górny <mgorny@gentoo.org> +# @BLURB: Common bits for fetching & unpacking llvm.org projects +# @DESCRIPTION: +# The llvm.org eclass provides common code to fetch and unpack parts +# of the llvm.org project tree. It takes care of handling both git +# checkouts and source tarballs, making it possible to unify the code +# of live and release ebuilds and effectively reduce the work needed +# to package new releases/RCs/branches. +# +# In order to use this eclass, the ebuild needs to declare +# LLVM_COMPONENTS and then call llvm.org_set_globals. If tests require +# additional components, they need to be listed in LLVM_TEST_COMPONENTS. +# The eclass exports an implementation of src_unpack() phase. +# +# Example: +# @CODE +# inherit llvm.org +# +# LLVM_COMPONENTS=( lld ) +# LLVM_TEST_COMPONENTS=( llvm/utils/lit ) +# llvm.org_set_globals +# @CODE + +case "${EAPI:-0}" in + 7) + ;; + *) + die "Unsupported EAPI=${EAPI} for ${ECLASS}" + ;; +esac + + +# == internal control bits == + +# @ECLASS-VARIABLE: _LLVM_MASTER_MAJOR +# @INTERNAL +# @DESCRIPTION: +# The major version of current LLVM trunk. Used to determine +# the correct branch to use. +_LLVM_MASTER_MAJOR=10 + +# @ECLASS-VARIABLE: _LLVM_SOURCE_TYPE +# @INTERNAL +# @DESCRIPTION: +# Source type to use: 'git' or 'tar'. +if [[ -z ${_LLVM_SOURCE_TYPE+1} ]]; then + if [[ ${PV} == *.9999 ]]; then + _LLVM_SOURCE_TYPE=git + else + _LLVM_SOURCE_TYPE=tar + fi +fi + +[[ ${_LLVM_SOURCE_TYPE} == git ]] && inherit git-r3 + +[[ ${PV} == ${_LLVM_MASTER_MAJOR}.* && ${_LLVM_SOURCE_TYPE} == tar ]] && + die "${ECLASS}: Release ebuild for master branch?!" + + +# == control variables == + +# @ECLASS-VARIABLE: LLVM_COMPONENTS +# @REQUIRED +# @DESCRIPTION: +# List of components needed unconditionally. Specified as bash array +# with paths relative to llvm-project git. Automatically translated +# for tarball releases. +# +# The first path specified is used to construct default S. + +# @ECLASS-VARIABLE: LLVM_TEST_COMPONENTS +# @DEFAULT_UNSET +# @DESCRIPTION: +# List of additional components needed for tests. + + +# == global scope logic == + +# @FUNCTION: _llvm.org_get_archives +# @USAGE: <components> +# @INTERNAL +# @DESCRIPTION: +# Set 'archives' array to list of unique archive filenames +# for components passed as parameters. +_llvm.org_get_archives() { + local c + archives=() + + for c; do + local cn=${c%%/*} + case ${cn} in + clang) cn=cfe;; + esac + + local a=${cn}-${PV}.src.tar.xz + has "${a}" "${archives[@]}" || archives+=( "${a}" ) + done +} + +# @FUNCTION: llvm.org_set_globals +# @DESCRIPTION: +# Set global variables. This must be called after setting LLVM_* +# variables used by the eclass. +llvm.org_set_globals() { + if [[ $(declare -p LLVM_COMPONENTS) != "declare -a"* ]]; then + die 'LLVM_COMPONENTS must be an array.' + fi + if declare -p LLVM_TEST_COMPONENTS &>/dev/null; then + if [[ $(declare -p LLVM_TEST_COMPONENTS) != "declare -a"* ]]; then + die 'LLVM_TEST_COMPONENTS must be an array.' + fi + fi + + if [[ ${_LLVM_SOURCE_TYPE} == git ]]; then + EGIT_REPO_URI="https://github.com/llvm/llvm-project.git" + + [[ ${PV} != ${_LLVM_MASTER_MAJOR}.* ]] && + EGIT_BRANCH="release/${PV%%.*}.x" + elif [[ ${_LLVM_SOURCE_TYPE} == tar ]]; then + local a archives=() + _llvm.org_get_archives "${LLVM_COMPONENTS[@]}" + for a in "${archives[@]}"; do + SRC_URI+=" + https://releases.llvm.org/${PV}/${a}" + done + else + die "Invalid _LLVM_SOURCE_TYPE: ${LLVM_SOURCE_TYPE}" + fi + + S=${WORKDIR}/${LLVM_COMPONENTS[0]} + + if [[ -n ${LLVM_TEST_COMPONENTS+1} ]]; then + IUSE+=" test" + RESTRICT+=" !test? ( test )" + + if [[ ${_LLVM_SOURCE_TYPE} == tar ]]; then + SRC_URI+=" + test? (" + + _llvm.org_get_archives "${LLVM_TEST_COMPONENTS[@]}" + for a in "${archives[@]}"; do + SRC_URI+=" + https://releases.llvm.org/${PV}/${a}" + done + + SRC_URI+=" + )" + fi + fi + + _LLVM_ORG_SET_GLOBALS_CALLED=1 +} + + +# == phase functions == + +EXPORT_FUNCTIONS src_unpack + +# @FUNCTION: llvm.org_src_unpack +# @DESCRIPTION: +# Unpack or checkout requested LLVM components. +llvm.org_src_unpack() { + if [[ ! ${_LLVM_ORG_SET_GLOBALS_CALLED} ]]; then + die "llvm.org_set_globals must be called in global scope" + fi + + local components=( "${LLVM_COMPONENTS[@]}" ) + if [[ ${LLVM_TEST_COMPONENTS+1} ]] && use test; then + components+=( "${LLVM_TEST_COMPONENTS[@]}" ) + fi + + if [[ ${_LLVM_SOURCE_TYPE} == git ]]; then + git-r3_fetch + git-r3_checkout '' . '' "${components[@]}" + else + local c archives + # TODO: optimize this + for c in "${components[@]}"; do + local top_dir=${c%%/*} + _llvm.org_get_archives "${c}" + local sub_path=${archives[0]%.tar.xz} + [[ ${c} == */* ]] && sub_path+=/${c#*/} + + ebegin "Unpacking ${sub_path} from ${archives[0]}" + mkdir -p "${top_dir}" || die + tar -C "${top_dir}" -x -J -o --strip-components 1 \ + -f "${DISTDIR}/${archives[0]}" "${sub_path}" || die + eend + done + fi +} |