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List: gentoo-dev
Subject: Re: [gentoo-dev] [PATCHES git-r3] Clean up and different clone type support
From: Michał Górny <mgorny () gentoo ! org>
Date: 2014-02-26 15:19:38
Message-ID: 20140226161938.54874e98 () pomiot ! lan
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Dnia 2014-02-26, o godz. 12:55:20
Michał Górny <mgorny@gentoo.org> napisał(a):
> I will submit a long serie of patches in reply to this mail. They add
> support for EGIT_CLONE_TYPE and also fix some bugs I've found during
> the testing.
oh, and the complete eclass for easier testing.
--
Best regards,
Michał Górny
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# Copyright 1999-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/git-r3.eclass,v 1.26 2014/02/25 13:01:49 mgorny Exp $
# @ECLASS: git-r3.eclass
# @MAINTAINER:
# Michał Górny <mgorny@gentoo.org>
# @BLURB: Eclass for fetching and unpacking git repositories.
# @DESCRIPTION:
# Third generation eclass for easing maitenance 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'.
#
# 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' 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.
#
# A common case is to use 'single' whenever the build system requires
# access to full branch history or the remote (Google Code) does not
# support shallow clones. 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.
#
# 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: 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 "${EGIT_CLONE_TYPE}" in
mirror|single|shallow)
;;
*)
die "Invalid EGIT_CLONE_TYPE=${EGIT_CLONE_TYPE}"
esac
case "${EGIT_MIN_CLONE_TYPE}" in
shallow)
;;
single)
if [[ ${EGIT_CLONE_TYPE} == shallow ]]; then
ewarn "git-r3: ebuild needs to be cloned in 'single' mode, adjusting"
EGIT_CLONE_TYPE=single
fi
;;
mirror)
if [[ ${EGIT_CLONE_TYPE} != mirror ]]; then
ewarn "git-r3: ebuild needs to be cloned in 'mirror' mode, adjusting"
EGIT_CLONE_TYPE=mirror
fi
;;
*)
die "Invalid EGIT_MIN_CLONE_TYPE=${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 ${EGIT3_STORE_DIR} ]]; then
(
addwrite /
mkdir -m0755 -p "${EGIT3_STORE_DIR}" || die
) || die "Unable to create ${EGIT3_STORE_DIR}"
fi
addwrite "${EGIT3_STORE_DIR}"
if [[ ! -d ${GIT_DIR} ]]; then
mkdir "${GIT_DIR}" || die
git init --bare || die
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_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
for r in "${repos[@]}"; do
einfo "Fetching ${r} ..."
local fetch_command=( git fetch "${r}" )
if [[ ${EGIT_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 [[ ${EGIT_CLONE_TYPE} == shallow ]]; then
local EGIT_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}"
)
fi
if [[ ${EGIT_CLONE_TYPE} == shallow ]]; then
# use '--depth 1' when fetching a new branch
if [[ ! $(git rev-parse --quiet --verify "${fetch_r}") ]]
then
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 [[ ${EGIT_CLONE_TYPE} == mirror ]]; then
# find remote HEAD and update our HEAD properly
git symbolic-ref HEAD \
"$(_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
[[ ${success} ]] || die "Unable to fetch from any of EGIT_REPO_URI"
# recursively fetch submodules
if git cat-file -e "${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]}
local commit=$(git rev-parse "${local_ref}:${path}")
if [[ ! ${commit} ]]; then
die "Unable to get commit id for submodule ${subname}"
fi
if [[ ${url} == ./* || ${url} == ../* ]]; then
local subrepos=( "${repos[@]/%//${url}}" )
else
local subrepos=( "${url}" )
fi
git-r3_fetch "${subrepos[*]}" "${commit}" "${local_id}/${subname}"
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 ${repos[0]} to ${out_dir} ..."
if ! git cat-file -e refs/git-r3/"${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]}
if [[ ${url} == ./* || ${url} == ../* ]]; then
url=${repos[0]%%/}/${url}
fi
git-r3_checkout "${url}" "${out_dir}/${path}" \
"${local_id}/${subname}"
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 ${remote_ref} on ${r} ..." >&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_outofdate() {
debug-print-function ${FUNCNAME} "$@"
local new_commit_id=$(git-r3_peek_remote_ref)
ewarn "old: ${EGIT_VERSION}"
ewarn "new: ${new_commit_id}"
[[ ${new_commit_id} && ${old_commit_id} ]] || return 2
[[ ${EGIT_VERSION} != ${new_commit_id} ]]
}
_GIT_R3=1
fi
["signature.asc" (application/pgp-signature)]
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