Add git2 eclass from kde-testing.

1 files changed, 420 insertions, 0 deletions

diff --git a/eclass/git-2.eclass b/eclass/git-2.eclass
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+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+# @ECLASS: git-2.eclass
+# @MAINTAINER:
+# Tomas Chvatal <scarabeus@gentoo.org>
+# @BLURB: This eclass provides functions for fetch and unpack git repositories
+# @DESCRIPTION:
+# Eclass for easing maitenance of live ebuilds using git as remote repository.
+# Eclass support working with git submodules and branching.
+
+# This eclass support all EAPIs
+EXPORT_FUNCTIONS src_unpack
+
+DEPEND="dev-vcs/git"
+
+# This static variable is for storing the data in WORKDIR.
+# Sometimes we might want to redefine S.
+EGIT_SOURCEDIR="${WORKDIR}/${P}"
+
+# @FUNCTION: git-2_init_variables
+# @DESCRIPTION:
+# Internal function initializing all git variables.
+# We define it in function scope so user can define
+# all the variables before and after inherit.
+git-2_init_variables() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	# @ECLASS-VARIABLE: EGIT_STORE_DIR
+	# @DESCRIPTION:
+	# Storage directory for git sources.
+	: ${EGIT_STORE_DIR:="${PORTAGE_ACTUAL_DISTDIR-${DISTDIR}}/egit-src"}
+
+	# @ECLASS-VARIABLE: EGIT_HAS_SUBMODULES
+	# @DESCRIPTION:
+	# Set this to non-empty value to enable submodule support.
+	: ${EGIT_HAS_SUBMODULES:=}
+
+	# @ECLASS-VARIABLE: EGIT_FETCH_CMD
+	# @DESCRIPTION:
+	# Command for cloning the repository.
+	: ${EGIT_FETCH_CMD:="git clone"}
+
+	# @ECLASS-VARIABLE: EGIT_UPDATE_CMD
+	# @DESCRIPTION:
+	# Git fetch command.
+	: ${EGIT_UPDATE_CMD:="git pull -f -u"}
+
+	# @ECLASS-VARIABLE: EGIT_OPTIONS
+	# @DESCRIPTION:
+	# This variable value is passed to clone and fetch.
+	: ${EGIT_OPTIONS:=}
+
+	# @ECLASS-VARIABLE: EGIT_MASTER
+	# @DESCRIPTION:
+	# Variable for specifying master branch.
+	# Usefull when upstream don't have master branch.
+	: ${EGIT_MASTER:=master}
+
+	# @ECLASS-VARIABLE: EGIT_REPO_URI
+	# @DESCRIPTION:
+	# URI for the repository
+	# e.g. http://foo, git://bar
+	#
+	# Support multiple values:
+	# EGIT_REPO_URI="git://a/b.git http://c/d.git"
+	eval X="\$${PN//[-+]/_}_LIVE_REPO"
+	if [[ ${X} = "" ]]; then
+		: ${EGIT_REPO_URI:=}
+	else
+		EGIT_REPO_URI="${X}"
+	fi
+	[[ -z ${EGIT_REPO_URI} ]] && die "EGIT_REPO_URI must have some value."
+
+	# @ECLASS-VARIABLE: EVCS_OFFLINE
+	# @DESCRIPTION:
+	# Set this variable to a non-empty value to disable the automatic updating
+	# of an GIT source tree. This is intended to be set outside the git source
+	# tree by users.
+	: ${EVCS_OFFLINE:=}
+
+	# @ECLASS-VARIABLE: EGIT_BRANCH
+	# @DESCRIPTION:
+	# Specify the branch we want to check out from the repository
+	eval X="\$${PN//[-+]/_}_LIVE_BRANCH"
+	if [[ "${X}" = "" ]]; then
+		: ${EGIT_BRANCH:=${EGIT_MASTER}}
+	else
+		EGIT_BRANCH="${X}"
+	fi
+
+	# @ECLASS-VARIABLE: EGIT_COMMIT
+	# @DESCRIPTION:
+	# Specify commit we want to check out from the repository.
+	eval X="\$${PN//[-+]/_}_LIVE_COMMIT"
+	if [[ "${X}" = "" ]]; then
+		: ${EGIT_COMMIT:=${EGIT_BRANCH}}
+	else
+		EGIT_COMMIT="${X}"
+	fi
+
+	# @ECLASS-VARIABLE: EGIT_REPACK
+	# @DESCRIPTION:
+	# Set to non-empty value to repack objects to save disk space. However this
+	# can take a REALLY LONG time with VERY big repositories.
+	: ${EGIT_REPACK:=}
+
+	# @ECLASS-VARIABLE: EGIT_PRUNE
+	# @DESCRIPTION:
+	# Set to non-empty value to prune loose objects on each fetch. This is
+	# useful if upstream rewinds and rebases branches often.
+	: ${EGIT_PRUNE:=}
+
+}
+
+# @FUNCTION: git-2_submodules
+# @DESCRIPTION:
+# Internal function wrapping the submodule initialisation and update
+git-2_submodules() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	[[ "$#" -ne 1 ]] && die "${FUNCNAME}: requires 1 argument (path)"
+
+	debug-print "${FUNCNAME}: working in \"${1}\""
+	pushd "${1}" &> /dev/null
+
+	# for submodules operations we need to be online
+	if [[ -z ${EVCS_OFFLINE} && -n ${EGIT_HAS_SUBMODULES} ]]; then
+		export GIT_DIR=${EGIT_DIR}
+		debug-print "${FUNCNAME}: git submodule init"
+		git submodule init \
+			|| die "${FUNCNAME}: git submodule initialisation failed"
+		debug-print "${FUNCNAME}: git submodule sync"
+		git submodule sync "" die "${FUNCNAME}: git submodule sync failed"
+		debug-print "${FUNCNAME}: git submodule update"
+		git submodule update || die "${FUNCNAME}: git submodule update failed"
+		unset GIT_DIR
+	fi
+
+	popd > /dev/null
+}
+
+# @FUNCTION: git-2_branch
+# @DESCRIPTION:
+# Internal function that changes branch for the repo based on EGIT_COMMIT and
+# EGIT_BRANCH variables.
+git-2_branch() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	debug-print "${FUNCNAME}: working in \"${EGIT_SOURCEDIR}\""
+	pushd "${EGIT_SOURCEDIR}" &> /dev/null
+
+	local branchname=branch-${EGIT_BRANCH} src=origin/${EGIT_BRANCH}
+	if [[ "${EGIT_COMMIT}" != "${EGIT_BRANCH}" ]]; then
+		branchname=tree-${EGIT_COMMIT}
+		src=${EGIT_COMMIT}
+	fi
+	debug-print "${FUNCNAME}: git checkout -b ${branchname} ${src}"
+	git checkout -b ${branchname} ${src} \
+		|| die "${FUNCNAME}: changing the branch failed"
+
+	popd > /dev/null
+
+	unset branchname src
+}
+
+# @FUNCTION: git-2_gc
+# @DESCRIPTION:
+# Internal function running garbage collector on checked out tree.
+git-2_gc() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	pushd "${EGIT_DIR}" &> /dev/null
+	if [[ -n ${EGIT_REPACK} || -n ${EGIT_PRUNE} ]]; then
+		ebegin "Garbage collecting the repository"
+		local args
+		[[ -n ${EGIT_PRUNE} ]] && args='--prune'
+		debug-print "${FUNCNAME}: git gc ${args}"
+		git gc ${args}
+		eend $?
+	fi
+	popd &> /dev/null
+}
+
+# @FUNCTION: git-2_prepare_storedir
+# @DESCRIPTION:
+# Internal function preparing directory where we are going to store SCM
+# repository.
+git-2_prepare_storedir() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local clone_dir
+	local save_sandbox_write=${SANDBOX_WRITE}
+
+	# initial clone, we have to create master git storage directory and play
+	# nicely with sandbox
+	if [[ ! -d "${EGIT_STORE_DIR}" ]] ; then
+		debug-print "${FUNCNAME}: Creating git main storage directory"
+		addwrite /
+		mkdir -p "${EGIT_STORE_DIR}" \
+			|| die "${FUNCNAME}: can't mkdir \"${EGIT_STORE_DIR}\"."
+		SANDBOX_WRITE=${save_sandbox_write}
+	fi
+
+	cd -P "${EGIT_STORE_DIR}" \
+		|| die "${FUNCNAME}:  can't chdir to \"${EGIT_STORE_DIR}\""
+	# allow writing into EGIT_STORE_DIR
+	addwrite "${EGIT_STORE_DIR}"
+	# calculate the proper store dir for data
+	[[ -z ${EGIT_REPO_URI##*/} ]] && EGIT_REPO_URI="${EGIT_REPO_URI%/}"
+	clone_dir="${EGIT_REPO_URI##*/}"
+	export EGIT_DIR="${EGIT_STORE_DIR}/${clone_dir}"
+	debug-print "${FUNCNAME}: Storing the repo into \"${EGIT_DIR}\"."
+
+	# we can not jump between using and not using SUBMODULES so we need to
+	# refetch the source when needed
+	if [[ -d "${EGIT_DIR}" && ! -d "${EGIT_DIR}"/.git ]]; then
+		debug-print "${FUNCNAME}: \"${clone_dir}\" was bare copy moving..."
+		mv "${EGIT_DIR}" "${EGIT_DIR}.bare" \
+			|| die "${FUNCNAME}: Moving the bare sources failed."
+
+	fi
+	# Tell user that he can remove his bare repository. It is not used.
+	if [[ -d "${EGIT_DIR}.bare" ]]; then
+		einfo "Found GIT bare repository at \"${EGIT_DIR}.bare\"."
+		einfo "This folder can be safely removed to save space."
+	fi
+}
+
+# @FUNCTION: git-2_move_source
+# @DESCRIPTION:
+# Internal function moving sources from the EGIT_DIR to EGIT_SOURCEDIR dir.
+git-2_move_source() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	pushd "${EGIT_DIR}" &> /dev/null
+	debug-print "${FUNCNAME}: rsync -rlpgo . \"${EGIT_SOURCEDIR}\""
+	rsync -rlpgo . "${EGIT_SOURCEDIR}" \
+		|| die "${FUNCNAME}: sync to \"${EGIT_SOURCEDIR}\" failed"
+	popd &> /dev/null
+}
+
+# @FUNCTION: git-2_initial_clone
+# @DESCRIPTION:
+# Run initial clone on specified repo_uri
+git-2_initial_clone() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local repo_uri
+
+	for repo_uri in ${EGIT_REPO_URI}; do
+		debug-print "${FUNCNAME}: ${EGIT_FETCH_CMD} ${EGIT_OPTIONS} \"${repo_uri}\" \"${EGIT_DIR}\""
+		${EGIT_FETCH_CMD} ${EGIT_OPTIONS} "${repo_uri}" "${EGIT_DIR}"
+		if [[ $? -eq 0 ]]; then
+			# global variable containing the repo_name we will be using
+			debug-print "${FUNCNAME}: EGIT_REPO_URI_SELECTED=\"${repo_uri}\""
+			EGIT_REPO_URI_SELECTED="${repo_uri}"
+			break
+		fi
+	done
+
+	if [[ -z ${EGIT_REPO_URI_SELECTED} ]]; then
+		die "${FUNCNAME}: can't fetch from ${EGIT_REPO_URI}."
+	fi
+}
+
+# @FUNCTION: git-2_update_repo
+# @DESCRIPTION:
+# Run update command on specified repo_uri
+git-2_update_repo() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local repo_uri
+
+	# checkout master branch and drop all other local branches
+	git checkout ${EGIT_MASTER}
+	for x in $(git branch |grep -v "* ${EGIT_MASTER}" |tr '\n' ' '); do
+		debug-print "${FUNCNAME}: git branch -D ${x}"
+		git branch -D ${x}
+	done
+
+	for repo_uri in ${EGIT_REPO_URI}; do
+		# git urls might change, so reset it
+		git config remote.origin.url "${repo_uri}"
+
+		debug-print "${EGIT_UPDATE_CMD} ${EGIT_OPTIONS}"
+		${EGIT_UPDATE_CMD} ${EGIT_OPTIONS}
+
+		if [[ $? -eq 0 ]]; then
+			# global variable containing the repo_name we will be using
+			debug-print "${FUNCNAME}: EGIT_REPO_URI_SELECTED=\"${repo_uri}\""
+			EGIT_REPO_URI_SELECTED="${repo_uri}"
+			break
+		fi
+	done
+
+	if [[ -z ${EGIT_REPO_URI_SELECTED} ]]; then
+		die "${FUNCNAME}: can't update from ${EGIT_REPO_URI_SELECTED}."
+	fi
+}
+
+# @FUNCTION: git-2_fetch
+# @DESCRIPTION:
+# Internal function fetching repository from EGIT_REPO_URI and storing it in
+# specified EGIT_STORE_DIR.
+git-2_fetch() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	local oldsha cursha upstream_branch
+
+	upstream_branch=origin/${EGIT_BRANCH}
+
+	if [[ ! -d ${EGIT_DIR} ]] ; then
+		git-2_initial_clone
+		pushd "${EGIT_DIR}" &> /dev/null
+		cursha=$(git rev-parse ${upstream_branch})
+		einfo "GIT NEW clone -->"
+		einfo "   repository:               ${EGIT_REPO_URI_SELECTED}"
+		einfo "   at the commit:            ${cursha}"
+
+		git-2_submodules "${EGIT_DIR}"
+		popd &> /dev/null
+	elif [[ -n ${EVCS_OFFLINE} ]] ; then
+		pushd "${EGIT_DIR}" &> /dev/null
+		cursha=$(git rev-parse ${upstream_branch})
+		einfo "GIT offline update -->"
+		einfo "   repository:               $(git config remote.origin.url)"
+		einfo "   at the commit:            ${cursha}"
+		popd &> /dev/null
+	else
+		pushd "${EGIT_DIR}" &> /dev/null
+		oldsha=$(git rev-parse ${upstream_branch})
+		git-2_update_repo
+		cursha=$(git rev-parse ${upstream_branch})
+
+		# fetch updates
+		einfo "GIT update -->"
+		einfo "   repository:               ${EGIT_REPO_URI_SELECTED}"
+		# write out message based on the revisions
+		if [[ "${oldsha1}" != "${cursha1}" ]]; then
+			einfo "   updating from commit:     ${oldsha}"
+			einfo "   to commit:                ${cursha}"
+		else
+			einfo "   at the commit:            ${cursha}"
+		fi
+
+		git-2_submodules "${EGIT_DIR}"
+
+		# print nice statistic of what was changed
+		git --no-pager diff --stat ${oldsha}..${upstream_branch}
+		popd &> /dev/null
+	fi
+	# export the version the repository is at
+	export EGIT_VERSION="${cursha1}"
+	# log the repo state
+	[[ "${EGIT_COMMIT}" != "${EGIT_BRANCH}" ]] \
+		&& einfo "   commit:                   ${EGIT_COMMIT}"
+	einfo "   branch:                   ${EGIT_BRANCH}"
+	einfo "   storage directory:        \"${EGIT_DIR}\""
+}
+
+# @FUNCTION: git_bootstrap
+# @DESCRIPTION:
+# Internal function that runs bootstrap command on unpacked source.
+git-2_bootstrap() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	# @ECLASS_VARIABLE: EGIT_BOOTSTRAP
+	# @DESCRIPTION:
+	# Command to be executed after checkout and clone of the specified
+	# repository.
+	# enviroment the package will fail if there is no update, thus in
+	# combination with --keep-going it would lead in not-updating
+	# pakcages that are up-to-date.
+	if [[ -n ${EGIT_BOOTSTRAP} ]] ; then
+		pushd "${EGIT_SOURCEDIR}" &> /dev/null
+		einfo "Starting bootstrap"
+
+		if [[ -f ${EGIT_BOOTSTRAP} ]]; then
+			# we have file in the repo which we should execute
+			debug-print "${FUNCNAME}: bootstraping with file \"${EGIT_BOOTSTRAP}\""
+
+			if [[ -x ${EGIT_BOOTSTRAP} ]]; then
+				eval "./${EGIT_BOOTSTRAP}" \
+					|| die "${FUNCNAME}: bootstrap script failed"
+			else
+				eerror "\"${EGIT_BOOTSTRAP}\" is not executable."
+				eerror "Report upstream, or bug ebuild maintainer to remove bootstrap command."
+				die "\"${EGIT_BOOTSTRAP}\" is not executable."
+			fi
+		else
+			# we execute some system command
+			debug-print "${FUNCNAME}: bootstraping with commands \"${EGIT_BOOTSTRAP}\""
+
+			eval "${EGIT_BOOTSTRAP}" \
+				|| die "${FUNCNAME}: bootstrap commands failed."
+		fi
+
+		einfo "Bootstrap finished"
+		popd > /dev/null
+	fi
+}
+
+# @FUNCTION: git-2_src_unpack
+# @DESCRIPTION:
+# src_upack function
+git-2_src_unpack() {
+	debug-print-function ${FUNCNAME} "$@"
+
+	git-2_init_variables
+	git-2_prepare_storedir
+	git-2_fetch $@
+	git-2_gc
+	git-2_move_source
+	git-2_branch
+	git-2_submodules "${EGIT_SOURCEDIR}"
+	git-2_bootstrap
+	echo ">>> Unpacked to ${EGIT_SOURCEDIR}"
+}