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Diffstat (limited to 'eclass/git-r3.eclass')
| -rw-r--r-- | eclass/git-r3.eclass | 988 |
1 files changed, 988 insertions, 0 deletions
diff --git a/eclass/git-r3.eclass b/eclass/git-r3.eclass new file mode 100644 index 000000000000..0ee70bc4a51a --- /dev/null +++ b/eclass/git-r3.eclass @@ -0,0 +1,988 @@ +# Copyright 1999-2015 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# $Id$ + +# @ECLASS: git-r3.eclass +# @MAINTAINER: +# Michał Górny <mgorny@gentoo.org> +# @BLURB: Eclass for fetching and unpacking git repositories. +# @DESCRIPTION: +# Third generation eclass for easing maintenance of live ebuilds using +# git as remote repository. + +case "${EAPI:-0}" in + 0|1|2|3|4|5) + ;; + *) + die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}" + ;; +esac + +if [[ ! ${_GIT_R3} ]]; then + +inherit eutils + +fi + +EXPORT_FUNCTIONS src_unpack + +if [[ ! ${_GIT_R3} ]]; then + +if [[ ! ${_INHERITED_BY_GIT_2} ]]; then + DEPEND=">=dev-vcs/git-1.8.2.1" +fi + +# @ECLASS-VARIABLE: EGIT_CLONE_TYPE +# @DESCRIPTION: +# Type of clone that should be used against the remote repository. +# This can be either of: 'mirror', 'single', 'shallow'. +# +# This is intended to be set by user in make.conf. Ebuilds are supposed +# to set EGIT_MIN_CLONE_TYPE if necessary instead. +# +# The 'mirror' type clones all remote branches and tags with complete +# history and all notes. EGIT_COMMIT can specify any commit hash. +# Upstream-removed branches and tags are purged from the local clone +# while fetching. This mode is suitable for cloning the local copy +# for development or hosting a local git mirror. However, clones +# of repositories with large diverged branches may quickly grow large. +# +# The 'single+tags' type clones the requested branch and all tags +# in the repository. All notes are fetched as well. EGIT_COMMIT +# can safely specify hashes throughout the current branch and all tags. +# No purging of old references is done (if you often switch branches, +# you may need to remove stale branches yourself). This mode is intended +# mostly for use with broken git servers such as Google Code that fail +# to fetch tags along with the branch in 'single' mode. +# +# The 'single' type clones only the requested branch or tag. Tags +# referencing commits throughout the branch history are fetched as well, +# and all notes. EGIT_COMMIT can safely specify only hashes +# in the current branch. No purging of old references is done (if you +# often switch branches, you may need to remove stale branches +# yourself). This mode is suitable for general use. +# +# The 'shallow' type clones only the newest commit on requested branch +# or tag. EGIT_COMMIT can only specify tags, and since the history is +# unavailable calls like 'git describe' will not reference prior tags. +# No purging of old references is done. This mode is intended mostly for +# embedded systems with limited disk space. +: ${EGIT_CLONE_TYPE:=single} + +# @ECLASS-VARIABLE: EGIT_MIN_CLONE_TYPE +# @DESCRIPTION: +# 'Minimum' clone type supported by the ebuild. Takes same values +# as EGIT_CLONE_TYPE. When user sets a type that's 'lower' (that is, +# later on the list) than EGIT_MIN_CLONE_TYPE, the eclass uses +# EGIT_MIN_CLONE_TYPE instead. +# +# This variable is intended to be used by ebuilds only. Users are +# supposed to set EGIT_CLONE_TYPE instead. +# +# A common case is to use 'single' whenever the build system requires +# access to full branch history, or 'single+tags' when Google Code +# or a similar remote is used that does not support shallow clones +# and fetching tags along with commits. Please use sparingly, and to fix +# fatal errors rather than 'non-pretty versions'. +: ${EGIT_MIN_CLONE_TYPE:=shallow} + +# @ECLASS-VARIABLE: EGIT3_STORE_DIR +# @DESCRIPTION: +# Storage directory for git sources. +# +# This is intended to be set by user in make.conf. Ebuilds must not set +# it. +# +# EGIT3_STORE_DIR=${DISTDIR}/git3-src + +# @ECLASS-VARIABLE: EGIT_MIRROR_URI +# @DEFAULT_UNSET +# @DESCRIPTION: +# 'Top' URI to a local git mirror. If specified, the eclass will try +# to fetch from the local mirror instead of using the remote repository. +# +# The mirror needs to follow EGIT3_STORE_DIR structure. The directory +# created by eclass can be used for that purpose. +# +# Example: +# @CODE +# EGIT_MIRROR_URI="git://mirror.lan/" +# @CODE + +# @ECLASS-VARIABLE: EGIT_REPO_URI +# @REQUIRED +# @DESCRIPTION: +# URIs to the repository, e.g. git://foo, https://foo. If multiple URIs +# are provided, the eclass will consider them as fallback URIs to try +# if the first URI does not work. For supported URI syntaxes, read up +# the manpage for git-clone(1). +# +# It can be overriden via env using ${PN}_LIVE_REPO variable. +# +# Can be a whitespace-separated list or an array. +# +# Example: +# @CODE +# EGIT_REPO_URI="git://a/b.git https://c/d.git" +# @CODE + +# @ECLASS-VARIABLE: EVCS_OFFLINE +# @DEFAULT_UNSET +# @DESCRIPTION: +# If non-empty, this variable prevents any online operations. + +# @ECLASS-VARIABLE: EVCS_UMASK +# @DEFAULT_UNSET +# @DESCRIPTION: +# Set this variable to a custom umask. This is intended to be set by +# users. By setting this to something like 002, it can make life easier +# for people who do development as non-root (but are in the portage +# group), and then switch over to building with FEATURES=userpriv. +# Or vice-versa. Shouldn't be a security issue here as anyone who has +# portage group write access already can screw the system over in more +# creative ways. + +# @ECLASS-VARIABLE: EGIT_BRANCH +# @DEFAULT_UNSET +# @DESCRIPTION: +# The branch name to check out. If unset, the upstream default (HEAD) +# will be used. +# +# It can be overriden via env using ${PN}_LIVE_BRANCH variable. + +# @ECLASS-VARIABLE: EGIT_COMMIT +# @DEFAULT_UNSET +# @DESCRIPTION: +# The tag name or commit identifier to check out. If unset, newest +# commit from the branch will be used. If set, EGIT_BRANCH will +# be ignored. +# +# It can be overriden via env using ${PN}_LIVE_COMMIT variable. + +# @ECLASS-VARIABLE: EGIT_CHECKOUT_DIR +# @DESCRIPTION: +# The directory to check the git sources out to. +# +# EGIT_CHECKOUT_DIR=${WORKDIR}/${P} + +# @FUNCTION: _git-r3_env_setup +# @INTERNAL +# @DESCRIPTION: +# Set the eclass variables as necessary for operation. This can involve +# setting EGIT_* to defaults or ${PN}_LIVE_* variables. +_git-r3_env_setup() { + debug-print-function ${FUNCNAME} "$@" + + # check the clone type + case "${EGIT_CLONE_TYPE}" in + mirror|single+tags|single|shallow) + ;; + *) + die "Invalid EGIT_CLONE_TYPE=${EGIT_CLONE_TYPE}" + esac + case "${EGIT_MIN_CLONE_TYPE}" in + shallow) + ;; + single) + if [[ ${EGIT_CLONE_TYPE} == shallow ]]; then + einfo "git-r3: ebuild needs to be cloned in '\e[1msingle\e[22m' mode, adjusting" + EGIT_CLONE_TYPE=single + fi + ;; + single+tags) + if [[ ${EGIT_CLONE_TYPE} == shallow || ${EGIT_CLONE_TYPE} == single ]]; then + einfo "git-r3: ebuild needs to be cloned in '\e[1msingle+tags\e[22m' mode, adjusting" + EGIT_CLONE_TYPE=single+tags + fi + ;; + mirror) + if [[ ${EGIT_CLONE_TYPE} != mirror ]]; then + einfo "git-r3: ebuild needs to be cloned in '\e[1mmirror\e[22m' mode, adjusting" + EGIT_CLONE_TYPE=mirror + fi + ;; + *) + die "Invalid EGIT_MIN_CLONE_TYPE=${EGIT_MIN_CLONE_TYPE}" + esac + + local esc_pn livevar + esc_pn=${PN//[-+]/_} + + livevar=${esc_pn}_LIVE_REPO + EGIT_REPO_URI=${!livevar:-${EGIT_REPO_URI}} + [[ ${!livevar} ]] \ + && ewarn "Using ${livevar}, no support will be provided" + + livevar=${esc_pn}_LIVE_BRANCH + EGIT_BRANCH=${!livevar:-${EGIT_BRANCH}} + [[ ${!livevar} ]] \ + && ewarn "Using ${livevar}, no support will be provided" + + livevar=${esc_pn}_LIVE_COMMIT + EGIT_COMMIT=${!livevar:-${EGIT_COMMIT}} + [[ ${!livevar} ]] \ + && ewarn "Using ${livevar}, no support will be provided" + + # Migration helpers. Remove them when git-2 is removed. + + if [[ ${EGIT_SOURCEDIR} ]]; then + eerror "EGIT_SOURCEDIR has been replaced by EGIT_CHECKOUT_DIR. While updating" + eerror "your ebuild, please check whether the variable is necessary at all" + eerror "since the default has been changed from \${S} to \${WORKDIR}/\${P}." + eerror "Therefore, proper setting of S may be sufficient." + die "EGIT_SOURCEDIR has been replaced by EGIT_CHECKOUT_DIR." + fi + + if [[ ${EGIT_MASTER} ]]; then + eerror "EGIT_MASTER has been removed. Instead, the upstream default (HEAD)" + eerror "is used by the eclass. Please remove the assignment or use EGIT_BRANCH" + eerror "as necessary." + die "EGIT_MASTER has been removed." + fi + + if [[ ${EGIT_HAS_SUBMODULES} ]]; then + eerror "EGIT_HAS_SUBMODULES has been removed. The eclass no longer needs" + eerror "to switch the clone type in order to support submodules and therefore" + eerror "submodules are detected and fetched automatically." + die "EGIT_HAS_SUBMODULES is no longer necessary." + fi + + if [[ ${EGIT_PROJECT} ]]; then + eerror "EGIT_PROJECT has been removed. Instead, the eclass determines" + eerror "the local clone path using path in canonical EGIT_REPO_URI." + eerror "If the current algorithm causes issues for you, please report a bug." + die "EGIT_PROJECT is no longer necessary." + fi + + if [[ ${EGIT_BOOTSTRAP} ]]; then + eerror "EGIT_BOOTSTRAP has been removed. Please create proper src_prepare()" + eerror "instead." + die "EGIT_BOOTSTRAP has been removed." + fi + + if [[ ${EGIT_NOUNPACK} ]]; then + eerror "EGIT_NOUNPACK has been removed. The eclass no longer calls default" + eerror "unpack function. If necessary, please declare proper src_unpack()." + die "EGIT_NOUNPACK has been removed." + fi +} + +# @FUNCTION: _git-r3_set_gitdir +# @USAGE: <repo-uri> +# @INTERNAL +# @DESCRIPTION: +# Obtain the local repository path and set it as GIT_DIR. Creates +# a new repository if necessary. +# +# <repo-uri> may be used to compose the path. It should therefore be +# a canonical URI to the repository. +_git-r3_set_gitdir() { + debug-print-function ${FUNCNAME} "$@" + + local repo_name=${1#*://*/} + + # strip the trailing slash + repo_name=${repo_name%/} + + # strip common prefixes to make paths more likely to match + # e.g. git://X/Y.git vs https://X/git/Y.git + # (but just one of the prefixes) + case "${repo_name}" in + # gnome.org... who else? + browse/*) repo_name=${repo_name#browse/};; + # cgit can proxy requests to git + cgit/*) repo_name=${repo_name#cgit/};; + # pretty common + git/*) repo_name=${repo_name#git/};; + # gentoo.org + gitroot/*) repo_name=${repo_name#gitroot/};; + # google code, sourceforge + p/*) repo_name=${repo_name#p/};; + # kernel.org + pub/scm/*) repo_name=${repo_name#pub/scm/};; + esac + # ensure a .git suffix, same reason + repo_name=${repo_name%.git}.git + # now replace all the slashes + repo_name=${repo_name//\//_} + + local distdir=${PORTAGE_ACTUAL_DISTDIR:-${DISTDIR}} + : ${EGIT3_STORE_DIR:=${distdir}/git3-src} + + GIT_DIR=${EGIT3_STORE_DIR}/${repo_name} + + if [[ ! -d ${EGIT3_STORE_DIR} ]]; then + ( + addwrite / + mkdir -p "${EGIT3_STORE_DIR}" || die + ) || die "Unable to create ${EGIT3_STORE_DIR}" + fi + + addwrite "${EGIT3_STORE_DIR}" + if [[ ! -d ${GIT_DIR} ]]; then + local saved_umask + if [[ ${EVCS_UMASK} ]]; then + saved_umask=$(umask) + umask "${EVCS_UMASK}" || die "Bad options to umask: ${EVCS_UMASK}" + fi + mkdir "${GIT_DIR}" || die + git init --bare || die + if [[ ${saved_umask} ]]; then + umask "${saved_umask}" || die + fi + fi +} + +# @FUNCTION: _git-r3_set_submodules +# @USAGE: <file-contents> +# @INTERNAL +# @DESCRIPTION: +# Parse .gitmodules contents passed as <file-contents> +# as in "$(cat .gitmodules)"). Composes a 'submodules' array that +# contains in order (name, URL, path) for each submodule. +_git-r3_set_submodules() { + debug-print-function ${FUNCNAME} "$@" + + local data=${1} + + # ( name url path ... ) + submodules=() + + local l + while read l; do + # submodule.<path>.path=<path> + # submodule.<path>.url=<url> + [[ ${l} == submodule.*.url=* ]] || continue + + l=${l#submodule.} + local subname=${l%%.url=*} + + # skip modules that have 'update = none', bug #487262. + local upd=$(echo "${data}" | git config -f /dev/fd/0 \ + submodule."${subname}".update) + [[ ${upd} == none ]] && continue + + submodules+=( + "${subname}" + "$(echo "${data}" | git config -f /dev/fd/0 \ + submodule."${subname}".url || die)" + "$(echo "${data}" | git config -f /dev/fd/0 \ + submodule."${subname}".path || die)" + ) + done < <(echo "${data}" | git config -f /dev/fd/0 -l || die) +} + +# @FUNCTION: _git-r3_set_subrepos +# @USAGE: <submodule-uri> <parent-repo-uri>... +# @INTERNAL +# @DESCRIPTION: +# Create 'subrepos' array containing absolute (canonical) submodule URIs +# for the given <submodule-uri>. If the URI is relative, URIs will be +# constructed using all <parent-repo-uri>s. Otherwise, this single URI +# will be placed in the array. +_git-r3_set_subrepos() { + debug-print-function ${FUNCNAME} "$@" + + local suburl=${1} + subrepos=( "${@:2}" ) + + if [[ ${suburl} == ./* || ${suburl} == ../* ]]; then + # drop all possible trailing slashes for consistency + subrepos=( "${subrepos[@]%%/}" ) + + while true; do + if [[ ${suburl} == ./* ]]; then + suburl=${suburl:2} + elif [[ ${suburl} == ../* ]]; then + suburl=${suburl:3} + + # XXX: correctness checking + + # drop the last path component + subrepos=( "${subrepos[@]%/*}" ) + # and then the trailing slashes, again + subrepos=( "${subrepos[@]%%/}" ) + else + break + fi + done + + # append the preprocessed path to the preprocessed URIs + subrepos=( "${subrepos[@]/%//${suburl}}") + else + subrepos=( "${suburl}" ) + fi +} + + +# @FUNCTION: _git-r3_is_local_repo +# @USAGE: <repo-uri> +# @INTERNAL +# @DESCRIPTION: +# Determine whether the given URI specifies a local (on-disk) +# repository. +_git-r3_is_local_repo() { + debug-print-function ${FUNCNAME} "$@" + + local uri=${1} + + [[ ${uri} == file://* || ${uri} == /* ]] +} + +# @FUNCTION: _git-r3_find_head +# @USAGE: <head-ref> +# @INTERNAL +# @DESCRIPTION: +# Given a ref to which remote HEAD was fetched, try to find +# a branch matching the commit. Expects 'git show-ref' +# or 'git ls-remote' output on stdin. +_git-r3_find_head() { + debug-print-function ${FUNCNAME} "$@" + + local head_ref=${1} + local head_hash=$(git rev-parse --verify "${1}" || die) + local matching_ref + + # TODO: some transports support peeking at symbolic remote refs + # find a way to use that rather than guessing + + # (based on guess_remote_head() in git-1.9.0/remote.c) + local h ref + while read h ref; do + # look for matching head + if [[ ${h} == ${head_hash} ]]; then + # either take the first matching ref, or master if it is there + if [[ ! ${matching_ref} || ${ref} == refs/heads/master ]]; then + matching_ref=${ref} + fi + fi + done + + if [[ ! ${matching_ref} ]]; then + die "Unable to find a matching branch for remote HEAD (${head_hash})" + fi + + echo "${matching_ref}" +} + +# @FUNCTION: git-r3_fetch +# @USAGE: [<repo-uri> [<remote-ref> [<local-id>]]] +# @DESCRIPTION: +# Fetch new commits to the local clone of repository. +# +# <repo-uri> specifies the repository URIs to fetch from, as a space- +# -separated list. The first URI will be used as repository group +# identifier and therefore must be used consistently. When not +# specified, defaults to ${EGIT_REPO_URI}. +# +# <remote-ref> specifies the remote ref or commit id to fetch. +# It is preferred to use 'refs/heads/<branch-name>' for branches +# and 'refs/tags/<tag-name>' for tags. Other options are 'HEAD' +# for upstream default branch and hexadecimal commit SHA1. Defaults +# to the first of EGIT_COMMIT, EGIT_BRANCH or literal 'HEAD' that +# is set to a non-null value. +# +# <local-id> specifies the local branch identifier that will be used to +# locally store the fetch result. It should be unique to multiple +# fetches within the repository that can be performed at the same time +# (including parallel merges). It defaults to ${CATEGORY}/${PN}/${SLOT%/*}. +# This default should be fine unless you are fetching multiple trees +# from the same repository in the same ebuild. +# +# The fetch operation will affect the EGIT_STORE only. It will not touch +# the working copy, nor export any environment variables. +# If the repository contains submodules, they will be fetched +# recursively. +git-r3_fetch() { + debug-print-function ${FUNCNAME} "$@" + + [[ ${EVCS_OFFLINE} ]] && return + + local repos + if [[ ${1} ]]; then + repos=( ${1} ) + elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then + repos=( "${EGIT_REPO_URI[@]}" ) + else + repos=( ${EGIT_REPO_URI} ) + fi + + local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}} + local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}} + local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}} + local local_ref=refs/git-r3/${local_id}/__main__ + + [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset" + + local -x GIT_DIR + _git-r3_set_gitdir "${repos[0]}" + + # prepend the local mirror if applicable + if [[ ${EGIT_MIRROR_URI} ]]; then + repos=( + "${EGIT_MIRROR_URI%/}/${GIT_DIR##*/}" + "${repos[@]}" + ) + fi + + # try to fetch from the remote + local r success saved_umask + if [[ ${EVCS_UMASK} ]]; then + saved_umask=$(umask) + umask "${EVCS_UMASK}" || die "Bad options to umask: ${EVCS_UMASK}" + fi + for r in "${repos[@]}"; do + einfo "Fetching \e[1m${r}\e[22m ..." + + local fetch_command=( git fetch "${r}" ) + local clone_type=${EGIT_CLONE_TYPE} + + if [[ ${r} == https://* ]] && ! ROOT=/ has_version 'dev-vcs/git[curl]'; then + eerror "git-r3: fetching from https:// requested. In order to support https," + eerror "dev-vcs/git needs to be built with USE=curl. Example solution:" + eerror + eerror " echo dev-vcs/git curl >> /etc/portage/package.use" + eerror " emerge -1v dev-vcs/git" + die "dev-vcs/git built with USE=curl required." + fi + + if [[ ${r} == https://code.google.com/* ]]; then + # Google Code has special magic on top of git that: + # 1) can't handle shallow clones at all, + # 2) fetches duplicately when tags are pulled in with branch + # so automatically switch to single+tags mode. + if [[ ${clone_type} == shallow ]]; then + einfo " Google Code does not support shallow clones" + einfo " using \e[1mEGIT_CLONE_TYPE=single+tags\e[22m" + clone_type=single+tags + elif [[ ${clone_type} == single ]]; then + einfo " git-r3: Google Code does not send tags properly in 'single' mode" + einfo " using \e[1mEGIT_CLONE_TYPE=single+tags\e[22m" + clone_type=single+tags + fi + fi + + if [[ ${clone_type} == mirror ]]; then + fetch_command+=( + --prune + # mirror the remote branches as local branches + "+refs/heads/*:refs/heads/*" + # pull tags explicitly in order to prune them properly + "+refs/tags/*:refs/tags/*" + # notes in case something needs them + "+refs/notes/*:refs/notes/*" + # and HEAD in case we need the default branch + # (we keep it in refs/git-r3 since otherwise --prune interferes) + "+HEAD:refs/git-r3/HEAD" + ) + else # single or shallow + local fetch_l fetch_r + + if [[ ${remote_ref} == HEAD ]]; then + # HEAD + fetch_l=HEAD + elif [[ ${remote_ref} == refs/heads/* ]]; then + # regular branch + fetch_l=${remote_ref} + else + # tag or commit... + # let ls-remote figure it out + local tagref=$(git ls-remote "${r}" "refs/tags/${remote_ref}") + + # if it was a tag, ls-remote obtained a hash + if [[ ${tagref} ]]; then + # tag + fetch_l=refs/tags/${remote_ref} + else + # commit + # so we need to fetch the branch + if [[ ${branch} ]]; then + fetch_l=${branch} + else + fetch_l=HEAD + fi + + # fetching by commit in shallow mode? can't do. + if [[ ${clone_type} == shallow ]]; then + clone_type=single + fi + fi + fi + + if [[ ${fetch_l} == HEAD ]]; then + fetch_r=refs/git-r3/HEAD + else + fetch_r=${fetch_l} + fi + + fetch_command+=( + "+${fetch_l}:${fetch_r}" + ) + + if [[ ${clone_type} == single+tags ]]; then + fetch_command+=( + # pull tags explicitly as requested + "+refs/tags/*:refs/tags/*" + ) + fi + fi + + if [[ ${clone_type} == shallow ]]; then + if _git-r3_is_local_repo; then + # '--depth 1' causes sandbox violations with local repos + # bug #491260 + clone_type=single + elif [[ ! $(git rev-parse --quiet --verify "${fetch_r}") ]] + then + # use '--depth 1' when fetching a new branch + fetch_command+=( --depth 1 ) + fi + else # non-shallow mode + if [[ -f ${GIT_DIR}/shallow ]]; then + fetch_command+=( --unshallow ) + fi + fi + + set -- "${fetch_command[@]}" + echo "${@}" >&2 + if "${@}"; then + if [[ ${clone_type} == mirror ]]; then + # find remote HEAD and update our HEAD properly + git symbolic-ref HEAD \ + "$(_git-r3_find_head refs/git-r3/HEAD \ + < <(git show-ref --heads || die))" \ + || die "Unable to update HEAD" + else # single or shallow + if [[ ${fetch_l} == HEAD ]]; then + # find out what branch we fetched as HEAD + local head_branch=$(_git-r3_find_head \ + refs/git-r3/HEAD \ + < <(git ls-remote --heads "${r}" || die)) + + # and move it to its regular place + git update-ref --no-deref "${head_branch}" \ + refs/git-r3/HEAD \ + || die "Unable to sync HEAD branch ${head_branch}" + git symbolic-ref HEAD "${head_branch}" \ + || die "Unable to update HEAD" + fi + fi + + # now let's see what the user wants from us + local full_remote_ref=$( + git rev-parse --verify --symbolic-full-name "${remote_ref}" + ) + + if [[ ${full_remote_ref} ]]; then + # when we are given a ref, create a symbolic ref + # so that we preserve the actual argument + set -- git symbolic-ref "${local_ref}" "${full_remote_ref}" + else + # otherwise, we were likely given a commit id + set -- git update-ref --no-deref "${local_ref}" "${remote_ref}" + fi + + echo "${@}" >&2 + if ! "${@}"; then + die "Referencing ${remote_ref} failed (wrong ref?)." + fi + + success=1 + break + fi + done + if [[ ${saved_umask} ]]; then + umask "${saved_umask}" || die + fi + [[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI" + + # submodules can reference commits in any branch + # always use the 'clone' mode to accomodate that, bug #503332 + local EGIT_CLONE_TYPE=mirror + + # recursively fetch submodules + if git cat-file -e "${local_ref}":.gitmodules &>/dev/null; then + local submodules + _git-r3_set_submodules \ + "$(git cat-file -p "${local_ref}":.gitmodules || die)" + + while [[ ${submodules[@]} ]]; do + local subname=${submodules[0]} + local url=${submodules[1]} + local path=${submodules[2]} + + # use only submodules for which path does exist + # (this is in par with 'git submodule'), bug #551100 + # note: git cat-file does not work for submodules + if [[ $(git ls-tree -d "${local_ref}" "${path}") ]] + then + local commit=$(git rev-parse "${local_ref}:${path}" || die) + + if [[ ! ${commit} ]]; then + die "Unable to get commit id for submodule ${subname}" + fi + + local subrepos + _git-r3_set_subrepos "${url}" "${repos[@]}" + + git-r3_fetch "${subrepos[*]}" "${commit}" "${local_id}/${subname}" + fi + + submodules=( "${submodules[@]:3}" ) # shift + done + fi +} + +# @FUNCTION: git-r3_checkout +# @USAGE: [<repo-uri> [<checkout-path> [<local-id>]]] +# @DESCRIPTION: +# Check the previously fetched tree to the working copy. +# +# <repo-uri> specifies the repository URIs, as a space-separated list. +# The first URI will be used as repository group identifier +# and therefore must be used consistently with git-r3_fetch. +# The remaining URIs are not used and therefore may be omitted. +# When not specified, defaults to ${EGIT_REPO_URI}. +# +# <checkout-path> specifies the path to place the checkout. It defaults +# to ${EGIT_CHECKOUT_DIR} if set, otherwise to ${WORKDIR}/${P}. +# +# <local-id> needs to specify the local identifier that was used +# for respective git-r3_fetch. +# +# The checkout operation will write to the working copy, and export +# the repository state into the environment. If the repository contains +# submodules, they will be checked out recursively. +git-r3_checkout() { + debug-print-function ${FUNCNAME} "$@" + + local repos + if [[ ${1} ]]; then + repos=( ${1} ) + elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then + repos=( "${EGIT_REPO_URI[@]}" ) + else + repos=( ${EGIT_REPO_URI} ) + fi + + local out_dir=${2:-${EGIT_CHECKOUT_DIR:-${WORKDIR}/${P}}} + local local_id=${3:-${CATEGORY}/${PN}/${SLOT%/*}} + + local -x GIT_DIR + _git-r3_set_gitdir "${repos[0]}" + + einfo "Checking out \e[1m${repos[0]}\e[22m to \e[1m${out_dir}\e[22m ..." + + if ! git cat-file -e refs/git-r3/"${local_id}"/__main__; then + if [[ ${EVCS_OFFLINE} ]]; then + die "No local clone of ${repos[0]}. Unable to work with EVCS_OFFLINE." + else + die "Logic error: no local clone of ${repos[0]}. git-r3_fetch not used?" + fi + fi + local remote_ref=$( + git symbolic-ref --quiet refs/git-r3/"${local_id}"/__main__ + ) + local new_commit_id=$( + git rev-parse --verify refs/git-r3/"${local_id}"/__main__ + ) + + git-r3_sub_checkout() { + local orig_repo=${GIT_DIR} + local -x GIT_DIR=${out_dir}/.git + local -x GIT_WORK_TREE=${out_dir} + + mkdir -p "${out_dir}" || die + + # use git init+fetch instead of clone since the latter doesn't like + # non-empty directories. + + git init --quiet || die + # setup 'alternates' to avoid copying objects + echo "${orig_repo}/objects" > "${GIT_DIR}"/objects/info/alternates || die + # now copy the refs + # [htn]* safely catches heads, tags, notes without complaining + # on non-existing ones, and omits internal 'git-r3' ref + cp -R "${orig_repo}"/refs/[htn]* "${GIT_DIR}"/refs/ || die + + # (no need to copy HEAD, we will set it via checkout) + + if [[ -f ${orig_repo}/shallow ]]; then + cp "${orig_repo}"/shallow "${GIT_DIR}"/ || die + fi + + set -- git checkout --quiet + if [[ ${remote_ref} ]]; then + set -- "${@}" "${remote_ref#refs/heads/}" + else + set -- "${@}" "${new_commit_id}" + fi + echo "${@}" >&2 + "${@}" || die "git checkout ${remote_ref:-${new_commit_id}} failed" + } + git-r3_sub_checkout + + local old_commit_id=$( + git rev-parse --quiet --verify refs/git-r3/"${local_id}"/__old__ + ) + if [[ ! ${old_commit_id} ]]; then + echo "GIT NEW branch -->" + echo " repository: ${repos[0]}" + echo " at the commit: ${new_commit_id}" + else + # diff against previous revision + echo "GIT update -->" + echo " repository: ${repos[0]}" + # write out message based on the revisions + if [[ "${old_commit_id}" != "${new_commit_id}" ]]; then + echo " updating from commit: ${old_commit_id}" + echo " to commit: ${new_commit_id}" + + git --no-pager diff --stat \ + ${old_commit_id}..${new_commit_id} + else + echo " at the commit: ${new_commit_id}" + fi + fi + git update-ref --no-deref refs/git-r3/"${local_id}"/{__old__,__main__} || die + + # recursively checkout submodules + if [[ -f ${out_dir}/.gitmodules ]]; then + local submodules + _git-r3_set_submodules \ + "$(<"${out_dir}"/.gitmodules)" + + while [[ ${submodules[@]} ]]; do + local subname=${submodules[0]} + local url=${submodules[1]} + local path=${submodules[2]} + + # use only submodules for which path does exist + # (this is in par with 'git submodule'), bug #551100 + if [[ -d ${out_dir}/${path} ]]; then + local subrepos + _git-r3_set_subrepos "${url}" "${repos[@]}" + + git-r3_checkout "${subrepos[*]}" "${out_dir}/${path}" \ + "${local_id}/${subname}" + fi + + submodules=( "${submodules[@]:3}" ) # shift + done + fi + + # keep this *after* submodules + export EGIT_DIR=${GIT_DIR} + export EGIT_VERSION=${new_commit_id} +} + +# @FUNCTION: git-r3_peek_remote_ref +# @USAGE: [<repo-uri> [<remote-ref>]] +# @DESCRIPTION: +# Peek the reference in the remote repository and print the matching +# (newest) commit SHA1. +# +# <repo-uri> specifies the repository URIs to fetch from, as a space- +# -separated list. When not specified, defaults to ${EGIT_REPO_URI}. +# +# <remote-ref> specifies the remote ref to peek. It is preferred to use +# 'refs/heads/<branch-name>' for branches and 'refs/tags/<tag-name>' +# for tags. Alternatively, 'HEAD' may be used for upstream default +# branch. Defaults to the first of EGIT_COMMIT, EGIT_BRANCH or literal +# 'HEAD' that is set to a non-null value. +# +# The operation will be done purely on the remote, without using local +# storage. If commit SHA1 is provided as <remote-ref>, the function will +# fail due to limitations of git protocol. +# +# On success, the function returns 0 and writes hexadecimal commit SHA1 +# to stdout. On failure, the function returns 1. +git-r3_peek_remote_ref() { + debug-print-function ${FUNCNAME} "$@" + + local repos + if [[ ${1} ]]; then + repos=( ${1} ) + elif [[ $(declare -p EGIT_REPO_URI) == "declare -a"* ]]; then + repos=( "${EGIT_REPO_URI[@]}" ) + else + repos=( ${EGIT_REPO_URI} ) + fi + + local branch=${EGIT_BRANCH:+refs/heads/${EGIT_BRANCH}} + local remote_ref=${2:-${EGIT_COMMIT:-${branch:-HEAD}}} + + [[ ${repos[@]} ]] || die "No URI provided and EGIT_REPO_URI unset" + + local r success + for r in "${repos[@]}"; do + einfo "Peeking \e[1m${remote_ref}\e[22m on \e[1m${r}\e[22m ..." >&2 + + local is_branch lookup_ref + if [[ ${remote_ref} == refs/heads/* || ${remote_ref} == HEAD ]] + then + is_branch=1 + lookup_ref=${remote_ref} + else + # ls-remote by commit is going to fail anyway, + # so we may as well pass refs/tags/ABCDEF... + lookup_ref=refs/tags/${remote_ref} + fi + + # split on whitespace + local ref=( + $(git ls-remote "${r}" "${lookup_ref}") + ) + + if [[ ${ref[0]} ]]; then + echo "${ref[0]}" + return 0 + fi + done + + return 1 +} + +git-r3_src_fetch() { + debug-print-function ${FUNCNAME} "$@" + + if [[ ! ${EGIT3_STORE_DIR} && ${EGIT_STORE_DIR} ]]; then + ewarn "You have set EGIT_STORE_DIR but not EGIT3_STORE_DIR. Please consider" + ewarn "setting EGIT3_STORE_DIR for git-r3.eclass. It is recommended to use" + ewarn "a different directory than EGIT_STORE_DIR to ease removing old clones" + ewarn "when git-2 eclass becomes deprecated." + fi + + _git-r3_env_setup + git-r3_fetch +} + +git-r3_src_unpack() { + debug-print-function ${FUNCNAME} "$@" + + _git-r3_env_setup + git-r3_src_fetch + git-r3_checkout +} + +# https://bugs.gentoo.org/show_bug.cgi?id=482666 +git-r3_pkg_needrebuild() { + debug-print-function ${FUNCNAME} "$@" + + local new_commit_id=$(git-r3_peek_remote_ref) + [[ ${new_commit_id} && ${EGIT_VERSION} ]] || die "Lookup failed" + + if [[ ${EGIT_VERSION} != ${new_commit_id} ]]; then + einfo "Update from \e[1m${EGIT_VERSION}\e[22m to \e[1m${new_commit_id}\e[22m" + else + einfo "Local and remote at \e[1m${EGIT_VERSION}\e[22m" + fi + + [[ ${EGIT_VERSION} != ${new_commit_id} ]] +} + +# 'export' locally until this gets into EAPI +pkg_needrebuild() { git-r3_pkg_needrebuild; } + +_GIT_R3=1 +fi |