eclass/git-2.eclass - third_party/overlays/portage-stable - Git at Google

 # Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2

 # @ECLASS: git-2.eclass
 # @MAINTAINER:
 # maintainer-needed@gentoo.org
 # @BLURB: Eclass for fetching and unpacking git repositories.
 # @DESCRIPTION:
 # Eclass for easing maintenance of live ebuilds using git as remote repository.
 # Eclass support working with git submodules and branching.
 #
 # This eclass is DEPRECATED. Please use git-r3 instead.

 if [[ ${EAPI} == 6 ]]; then
 	die "${ECLASS}.eclass is banned in EAPI ${EAPI}"
 fi

 # This eclass support all EAPIs.
 EXPORT_FUNCTIONS src_unpack

 DEPEND="dev-vcs/git"

 # @ECLASS-VARIABLE: EGIT_SOURCEDIR
 # @DESCRIPTION:
 # This variable specifies destination where the cloned
 # data are copied to.
 #
 # EGIT_SOURCEDIR="${S}"

 # @ECLASS-VARIABLE: EGIT_STORE_DIR
 # @DESCRIPTION:
 # Storage directory for git sources.
 #
 # EGIT_STORE_DIR="${DISTDIR}/egit-src"

 # @ECLASS-VARIABLE: EGIT_HAS_SUBMODULES
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # If non-empty this variable enables support for git submodules in our
 # checkout. Also this makes the checkout to be non-bare for now.

 # @ECLASS-VARIABLE: EGIT_OPTIONS
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # Variable specifying additional options for fetch command.

 # @ECLASS-VARIABLE: EGIT_MASTER
 # @DESCRIPTION:
 # Variable for specifying master branch.
 # Useful when upstream don't have master branch or name it differently.
 #
 # EGIT_MASTER="master"

 # @ECLASS-VARIABLE: EGIT_PROJECT
 # @DESCRIPTION:
 # Variable specifying name for the folder where we check out the git
 # repository. Value of this variable should be unique in the
 # EGIT_STORE_DIR as otherwise you would override another repository.
 #
 # EGIT_PROJECT="${EGIT_REPO_URI##*/}"

 # @ECLASS-VARIABLE: EGIT_DIR
 # @DESCRIPTION:
 # Directory where we want to store the git data.
 # This variable should not be overridden.
 #
 # EGIT_DIR="${EGIT_STORE_DIR}/${EGIT_PROJECT}"

 # @ECLASS-VARIABLE: EGIT_REPO_URI
 # @REQUIRED
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # URI for the repository
 # e.g. http://foo, git://bar
 #
 # It can be overridden via env using packagename_LIVE_REPO
 # variable.
 #
 # Support multiple values:
 # EGIT_REPO_URI="git://a/b.git http://c/d.git"

 # @ECLASS-VARIABLE: EVCS_OFFLINE
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # If non-empty this variable prevents performance of any online
 # operations.

 # @ECLASS-VARIABLE: EGIT_BRANCH
 # @DESCRIPTION:
 # Variable containing branch name we want to check out.
 # It can be overridden via env using packagename_LIVE_BRANCH
 # variable.
 #
 # EGIT_BRANCH="${EGIT_MASTER}"

 # @ECLASS-VARIABLE: EGIT_COMMIT
 # @DESCRIPTION:
 # Variable containing commit hash/tag we want to check out.
 # It can be overridden via env using packagename_LIVE_COMMIT
 # variable.
 #
 # EGIT_COMMIT="${EGIT_BRANCH}"

 # @ECLASS-VARIABLE: EGIT_REPACK
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # If non-empty this variable specifies that repository will be repacked to
 # save space. However this can take a REALLY LONG time with VERY big
 # repositories.

 # @ECLASS-VARIABLE: EGIT_PRUNE
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # If non-empty this variable enables pruning all loose objects on each fetch.
 # This is useful if upstream rewinds and rebases branches often.

 # @ECLASS-VARIABLE: EGIT_NONBARE
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # If non-empty this variable specifies that all checkouts will be done using
 # non bare repositories. This is useful if you can't operate with bare
 # checkouts for some reason.

 # @ECLASS-VARIABLE: EGIT_NOUNPACK
 # @DEFAULT_UNSET
 # @DESCRIPTION:
 # If non-empty this variable bans unpacking of ${A} content into the srcdir.
 # Default behavior is to unpack ${A} content.

 # @FUNCTION: git-2_init_variables
 # @INTERNAL
 # @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 ${FUNCNAME} "$@"

 	local esc_pn liverepo livebranch livecommit
 	esc_pn=${PN//[-+]/_}

 	: ${EGIT_SOURCEDIR="${S}"}

 	: ${EGIT_STORE_DIR:="${PORTAGE_ACTUAL_DISTDIR-${DISTDIR}}/egit-src"}

 	: ${EGIT_HAS_SUBMODULES:=}

 	: ${EGIT_OPTIONS:=}

 	: ${EGIT_MASTER:=master}

 	liverepo=${esc_pn}_LIVE_REPO
 	EGIT_REPO_URI=${!liverepo:-${EGIT_REPO_URI}}
 	[[ ${EGIT_REPO_URI} ]] || die "EGIT_REPO_URI must have some value"

 	: ${EVCS_OFFLINE:=}

 	livebranch=${esc_pn}_LIVE_BRANCH
 	[[ ${!livebranch} ]] && ewarn "QA: using \"${esc_pn}_LIVE_BRANCH\" variable, you won't get any support"
 	EGIT_BRANCH=${!livebranch:-${EGIT_BRANCH:-${EGIT_MASTER}}}

 	livecommit=${esc_pn}_LIVE_COMMIT
 	[[ ${!livecommit} ]] && ewarn "QA: using \"${esc_pn}_LIVE_COMMIT\" variable, you won't get any support"
 	EGIT_COMMIT=${!livecommit:-${EGIT_COMMIT:-${EGIT_BRANCH}}}

 	: ${EGIT_REPACK:=}

 	: ${EGIT_PRUNE:=}
 }

 # @FUNCTION: git-2_submodules
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function wrapping the submodule initialisation and update.
 git-2_submodules() {
 	debug-print-function ${FUNCNAME} "$@"
 	if [[ ${EGIT_HAS_SUBMODULES} ]]; then
 		if [[ ${EVCS_OFFLINE} ]]; then
 			# for submodules operations we need to be online
 			debug-print "${FUNCNAME}: not updating submodules in offline mode"
 			return 1
 		fi

 		debug-print "${FUNCNAME}: working in \"${1}\""
 		pushd "${EGIT_DIR}" > /dev/null || die

 		debug-print "${FUNCNAME}: git submodule init"
 		git submodule init || die
 		debug-print "${FUNCNAME}: git submodule sync"
 		git submodule sync || die
 		debug-print "${FUNCNAME}: git submodule update"
 		git submodule update || die

 		popd > /dev/null || die
 	fi
 }

 # @FUNCTION: git-2_branch
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function that changes branch for the repo based on EGIT_COMMIT and
 # EGIT_BRANCH variables.
 git-2_branch() {
 	debug-print-function ${FUNCNAME} "$@"

 	local branchname src

 	debug-print "${FUNCNAME}: working in \"${EGIT_SOURCEDIR}\""
 	pushd "${EGIT_SOURCEDIR}" > /dev/null || die

 	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 || die
 }

 # @FUNCTION: git-2_gc
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function running garbage collector on checked out tree.
 git-2_gc() {
 	debug-print-function ${FUNCNAME} "$@"

 	local args

 	if [[ ${EGIT_REPACK} || ${EGIT_PRUNE} ]]; then
 		pushd "${EGIT_DIR}" > /dev/null || die
 		ebegin "Garbage collecting the repository"
 		[[ ${EGIT_PRUNE} ]] && args='--prune'
 		debug-print "${FUNCNAME}: git gc ${args}"
 		git gc ${args}
 		eend $?
 		popd > /dev/null || die
 	fi
 }

 # @FUNCTION: git-2_prepare_storedir
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function preparing directory where we are going to store SCM
 # repository.
 git-2_prepare_storedir() {
 	debug-print-function ${FUNCNAME} "$@"

 	local clone_dir

 	# 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 -m 775 -p "${EGIT_STORE_DIR}" \
 			|| die "${FUNCNAME}: can't mkdir \"${EGIT_STORE_DIR}\""
 	fi

 	# allow writing into EGIT_STORE_DIR
 	addwrite "${EGIT_STORE_DIR}"

 	# calculate git.eclass store dir for data
 	# We will try to clone the old repository,
 	# and we will remove it if we don't need it anymore.
 	EGIT_OLD_CLONE=
 	if [[ ${EGIT_STORE_DIR} == */egit-src ]]; then
 		local old_store_dir=${EGIT_STORE_DIR/%egit-src/git-src}
 		local old_location=${old_store_dir}/${EGIT_PROJECT:-${PN}}

 		if [[ -d ${old_location} ]]; then
 			EGIT_OLD_CLONE=${old_location}
 			# required to remove the old clone
 			addwrite "${old_store_dir}"
 		fi
 	fi

 	# calculate the proper store dir for data
 	# If user didn't specify the EGIT_DIR, we check if he did specify
 	# the EGIT_PROJECT or get the folder name from EGIT_REPO_URI.
 	EGIT_REPO_URI=${EGIT_REPO_URI%/}
 	if [[ ! ${EGIT_DIR} ]]; then
 		if [[ ${EGIT_PROJECT} ]]; then
 			clone_dir=${EGIT_PROJECT}
 		else
 			local strippeduri=${EGIT_REPO_URI%/.git}
 			clone_dir=${strippeduri##*/}
 		fi
 		EGIT_DIR=${EGIT_STORE_DIR}/${clone_dir}

 		if [[ ${EGIT_OLD_CLONE} && ! -d ${EGIT_DIR} ]]; then
 			elog "${FUNCNAME}: ${CATEGORY}/${PF} will be cloned from old location."
 			elog "It will be necessary to rebuild the package to fetch updates."
 			EGIT_REPO_URI="${EGIT_OLD_CLONE} ${EGIT_REPO_URI}"
 		fi
 	fi
 	export EGIT_DIR=${EGIT_DIR}
 	debug-print "${FUNCNAME}: Storing the repo into \"${EGIT_DIR}\"."
 }

 # @FUNCTION: git-2_move_source
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function moving sources from the EGIT_DIR to EGIT_SOURCEDIR dir.
 git-2_move_source() {
 	debug-print-function ${FUNCNAME} "$@"

 	debug-print "${FUNCNAME}: ${MOVE_COMMAND} \"${EGIT_DIR}\" \"${EGIT_SOURCEDIR}\""
 	pushd "${EGIT_DIR}" > /dev/null || die
 	mkdir -p "${EGIT_SOURCEDIR}" \
 		|| die "${FUNCNAME}: failed to create ${EGIT_SOURCEDIR}"
 	${MOVE_COMMAND} "${EGIT_SOURCEDIR}" \
 		|| die "${FUNCNAME}: sync to \"${EGIT_SOURCEDIR}\" failed"
 	popd > /dev/null || die
 }

 # @FUNCTION: git-2_initial_clone
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function running initial clone on specified repo_uri.
 git-2_initial_clone() {
 	debug-print-function ${FUNCNAME} "$@"

 	local repo_uri

 	EGIT_REPO_URI_SELECTED=""
 	for repo_uri in ${EGIT_REPO_URI}; do
 		debug-print "${FUNCNAME}: git clone ${EGIT_LOCAL_OPTIONS} \"${repo_uri}\" \"${EGIT_DIR}\""
 		if git clone ${EGIT_LOCAL_OPTIONS} "${repo_uri}" "${EGIT_DIR}"; then
 			# global variable containing the repo_name we will be using
 			debug-print "${FUNCNAME}: EGIT_REPO_URI_SELECTED=\"${repo_uri}\""
 			EGIT_REPO_URI_SELECTED="${repo_uri}"
 			break
 		fi
 	done

 	[[ ${EGIT_REPO_URI_SELECTED} ]] \
 		|| die "${FUNCNAME}: can't fetch from ${EGIT_REPO_URI}"
 }

 # @FUNCTION: git-2_update_repo
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function running update command on specified repo_uri.
 git-2_update_repo() {
 	debug-print-function ${FUNCNAME} "$@"

 	local repo_uri

 	if [[ ${EGIT_LOCAL_NONBARE} ]]; then
 		# checkout master branch and drop all other local branches
 		git checkout ${EGIT_MASTER} || die "${FUNCNAME}: can't checkout master branch ${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} > /dev/null
 		done
 	fi

 	EGIT_REPO_URI_SELECTED=""
 	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}"
 		if ${EGIT_UPDATE_CMD} > /dev/null; then
 			# global variable containing the repo_name we will be using
 			debug-print "${FUNCNAME}: EGIT_REPO_URI_SELECTED=\"${repo_uri}\""
 			EGIT_REPO_URI_SELECTED="${repo_uri}"
 			break
 		fi
 	done

 	[[ ${EGIT_REPO_URI_SELECTED} ]] \
 		|| die "${FUNCNAME}: can't update from ${EGIT_REPO_URI}"
 }

 # @FUNCTION: git-2_fetch
 # @INTERNAL
 # @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 repo_type

 	[[ ${EGIT_LOCAL_NONBARE} ]] && repo_type="non-bare repository" || repo_type="bare repository"

 	if [[ ! -d ${EGIT_DIR} ]]; then
 		git-2_initial_clone
 		pushd "${EGIT_DIR}" > /dev/null || die
 		cursha=$(git rev-parse ${UPSTREAM_BRANCH})
 		echo "GIT NEW clone -->"
 		echo "   repository:               ${EGIT_REPO_URI_SELECTED}"
 		echo "   at the commit:            ${cursha}"

 		popd > /dev/null || die
 	elif [[ ${EVCS_OFFLINE} ]]; then
 		pushd "${EGIT_DIR}" > /dev/null || die
 		cursha=$(git rev-parse ${UPSTREAM_BRANCH})
 		echo "GIT offline update -->"
 		echo "   repository:               $(git config remote.origin.url)"
 		echo "   at the commit:            ${cursha}"
 		popd > /dev/null || die
 	else
 		pushd "${EGIT_DIR}" > /dev/null || die
 		oldsha=$(git rev-parse ${UPSTREAM_BRANCH})
 		git-2_update_repo
 		cursha=$(git rev-parse ${UPSTREAM_BRANCH})

 		# fetch updates
 		echo "GIT update -->"
 		echo "   repository:               ${EGIT_REPO_URI_SELECTED}"
 		# write out message based on the revisions
 		if [[ "${oldsha}" != "${cursha}" ]]; then
 			echo "   updating from commit:     ${oldsha}"
 			echo "   to commit:                ${cursha}"
 		else
 			echo "   at the commit:            ${cursha}"
 		fi

 		# print nice statistic of what was changed
 		git --no-pager diff --stat ${oldsha}..${UPSTREAM_BRANCH}
 		popd > /dev/null || die
 	fi
 	# export the version the repository is at
 	export EGIT_VERSION="${cursha}"
 	# log the repo state
 	[[ ${EGIT_COMMIT} != ${EGIT_BRANCH} ]] \
 		&& echo "   commit:                   ${EGIT_COMMIT}"
 	echo "   branch:                   ${EGIT_BRANCH}"
 	echo "   storage directory:        \"${EGIT_DIR}\""
 	echo "   checkout type:            ${repo_type}"

 	# Cleanup after git.eclass
 	if [[ ${EGIT_OLD_CLONE} ]]; then
 		einfo "${FUNCNAME}: removing old clone in ${EGIT_OLD_CLONE}."
 		rm -rf "${EGIT_OLD_CLONE}"
 	fi
 }

 # @FUNCTION: git_bootstrap
 # @INTERNAL
 # @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 [[ ${EGIT_BOOTSTRAP} ]]; then
 		pushd "${EGIT_SOURCEDIR}" > /dev/null || die
 		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 || die
 	fi
 }

 # @FUNCTION: git-2_migrate_repository
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function migrating between bare and normal checkout repository.
 # This is based on usage of EGIT_SUBMODULES, at least until they
 # start to work with bare checkouts sanely.
 # This function also set some global variables that differ between
 # bare and non-bare checkout.
 git-2_migrate_repository() {
 	debug-print-function ${FUNCNAME} "$@"

 	local bare returnstate

 	# first find out if we have submodules
 	# or user explicitly wants us to use non-bare clones
 	if ! [[ ${EGIT_HAS_SUBMODULES} || ${EGIT_NONBARE} ]]; then
 		bare=1
 	fi

 	# test if we already have some repo and if so find out if we have
 	# to migrate the data
 	if [[ -d ${EGIT_DIR} ]]; then
 		if [[ ${bare} && -d ${EGIT_DIR}/.git ]]; then
 			debug-print "${FUNCNAME}: converting \"${EGIT_DIR}\" to bare copy"

 			ebegin "Converting \"${EGIT_DIR}\" from non-bare to bare copy"
 			mv "${EGIT_DIR}/.git" "${EGIT_DIR}.bare"
 			export GIT_DIR="${EGIT_DIR}.bare"
 			git config core.bare true > /dev/null
 			returnstate=$?
 			unset GIT_DIR
 			rm -rf "${EGIT_DIR}"
 			mv "${EGIT_DIR}.bare" "${EGIT_DIR}"
 			eend ${returnstate}
 		elif [[ ! ${bare} && ! -d ${EGIT_DIR}/.git ]]; then
 			debug-print "${FUNCNAME}: converting \"${EGIT_DIR}\" to non-bare copy"

 			ebegin "Converting \"${EGIT_DIR}\" from bare to non-bare copy"
 			git clone -l "${EGIT_DIR}" "${EGIT_DIR}.nonbare" > /dev/null
 			returnstate=$?
 			rm -rf "${EGIT_DIR}"
 			mv "${EGIT_DIR}.nonbare" "${EGIT_DIR}"
 			eend ${returnstate}
 		fi
 	fi
 	if [[ ${returnstate} -ne 0 ]]; then
 		debug-print "${FUNCNAME}: converting \"${EGIT_DIR}\" failed, removing to start from scratch"

 		# migration failed, remove the EGIT_DIR to play it safe
 		einfo "Migration failed, removing \"${EGIT_DIR}\" to start from scratch."
 		rm -rf "${EGIT_DIR}"
 	fi

 	# set various options to work with both targets
 	if [[ ${bare} ]]; then
 		debug-print "${FUNCNAME}: working in bare repository for \"${EGIT_DIR}\""
 		EGIT_LOCAL_OPTIONS+="${EGIT_OPTIONS} --bare"
 		MOVE_COMMAND="git clone -l -s -n ${EGIT_DIR// /\\ }"
 		EGIT_UPDATE_CMD="git fetch -t -f -u origin ${EGIT_BRANCH}:${EGIT_BRANCH}"
 		UPSTREAM_BRANCH="${EGIT_BRANCH}"
 		EGIT_LOCAL_NONBARE=
 	else
 		debug-print "${FUNCNAME}: working in bare repository for non-bare \"${EGIT_DIR}\""
 		MOVE_COMMAND="cp -pPR ."
 		EGIT_LOCAL_OPTIONS="${EGIT_OPTIONS}"
 		EGIT_UPDATE_CMD="git pull -f -u ${EGIT_OPTIONS}"
 		UPSTREAM_BRANCH="origin/${EGIT_BRANCH}"
 		EGIT_LOCAL_NONBARE="true"
 	fi
 }

 # @FUNCTION: git-2_cleanup
 # @INTERNAL
 # @DESCRIPTION:
 # Internal function cleaning up all the global variables
 # that are not required after the unpack has been done.
 git-2_cleanup() {
 	debug-print-function ${FUNCNAME} "$@"

 	# Here we can unset only variables that are GLOBAL
 	# defined by the eclass, BUT NOT subject to change
 	# by user (like EGIT_PROJECT).
 	# If ebuild writer polutes his environment it is
 	# his problem only.
 	unset EGIT_DIR
 	unset MOVE_COMMAND
 	unset EGIT_LOCAL_OPTIONS
 	unset EGIT_UPDATE_CMD
 	unset UPSTREAM_BRANCH
 	unset EGIT_LOCAL_NONBARE
 }

 # @FUNCTION: git-2_src_unpack
 # @DESCRIPTION:
 # Default git src_unpack function.
 git-2_src_unpack() {
 	debug-print-function ${FUNCNAME} "$@"

 	git-2_init_variables
 	git-2_prepare_storedir
 	git-2_migrate_repository
 	git-2_fetch "$@"
 	git-2_gc
 	git-2_submodules
 	git-2_move_source
 	git-2_branch
 	git-2_bootstrap
 	git-2_cleanup
 	echo ">>> Unpacked to ${EGIT_SOURCEDIR}"

 	# Users can specify some SRC_URI and we should
 	# unpack the files too.
 	if [[ ! ${EGIT_NOUNPACK} ]]; then
 		if has ${EAPI:-0} 0 1; then
 			[[ ${A} ]] && unpack ${A}
 		else
 			default_src_unpack
 		fi
 	fi
 }
	# Copyright 1999-2014 Gentoo Foundation
	# Distributed under the terms of the GNU General Public License v2

	# @ECLASS: git-2.eclass
	# @MAINTAINER:
	# maintainer-needed@gentoo.org
	# @BLURB: Eclass for fetching and unpacking git repositories.
	# @DESCRIPTION:
	# Eclass for easing maintenance of live ebuilds using git as remote repository.
	# Eclass support working with git submodules and branching.
	#
	# This eclass is DEPRECATED. Please use git-r3 instead.

	if [[ ${EAPI} == 6 ]]; then
	die "${ECLASS}.eclass is banned in EAPI ${EAPI}"
	fi

	# This eclass support all EAPIs.
	EXPORT_FUNCTIONS src_unpack

	DEPEND="dev-vcs/git"

	# @ECLASS-VARIABLE: EGIT_SOURCEDIR
	# @DESCRIPTION:
	# This variable specifies destination where the cloned
	# data are copied to.
	#
	# EGIT_SOURCEDIR="${S}"

	# @ECLASS-VARIABLE: EGIT_STORE_DIR
	# @DESCRIPTION:
	# Storage directory for git sources.
	#
	# EGIT_STORE_DIR="${DISTDIR}/egit-src"

	# @ECLASS-VARIABLE: EGIT_HAS_SUBMODULES
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# If non-empty this variable enables support for git submodules in our
	# checkout. Also this makes the checkout to be non-bare for now.

	# @ECLASS-VARIABLE: EGIT_OPTIONS
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# Variable specifying additional options for fetch command.

	# @ECLASS-VARIABLE: EGIT_MASTER
	# @DESCRIPTION:
	# Variable for specifying master branch.
	# Useful when upstream don't have master branch or name it differently.
	#
	# EGIT_MASTER="master"

	# @ECLASS-VARIABLE: EGIT_PROJECT
	# @DESCRIPTION:
	# Variable specifying name for the folder where we check out the git
	# repository. Value of this variable should be unique in the
	# EGIT_STORE_DIR as otherwise you would override another repository.
	#
	# EGIT_PROJECT="${EGIT_REPO_URI##*/}"

	# @ECLASS-VARIABLE: EGIT_DIR
	# @DESCRIPTION:
	# Directory where we want to store the git data.
	# This variable should not be overridden.
	#
	# EGIT_DIR="${EGIT_STORE_DIR}/${EGIT_PROJECT}"

	# @ECLASS-VARIABLE: EGIT_REPO_URI
	# @REQUIRED
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# URI for the repository
	# e.g. http://foo, git://bar
	#
	# It can be overridden via env using packagename_LIVE_REPO
	# variable.
	#
	# Support multiple values:
	# EGIT_REPO_URI="git://a/b.git http://c/d.git"

	# @ECLASS-VARIABLE: EVCS_OFFLINE
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# If non-empty this variable prevents performance of any online
	# operations.

	# @ECLASS-VARIABLE: EGIT_BRANCH
	# @DESCRIPTION:
	# Variable containing branch name we want to check out.
	# It can be overridden via env using packagename_LIVE_BRANCH
	# variable.
	#
	# EGIT_BRANCH="${EGIT_MASTER}"

	# @ECLASS-VARIABLE: EGIT_COMMIT
	# @DESCRIPTION:
	# Variable containing commit hash/tag we want to check out.
	# It can be overridden via env using packagename_LIVE_COMMIT
	# variable.
	#
	# EGIT_COMMIT="${EGIT_BRANCH}"

	# @ECLASS-VARIABLE: EGIT_REPACK
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# If non-empty this variable specifies that repository will be repacked to
	# save space. However this can take a REALLY LONG time with VERY big
	# repositories.

	# @ECLASS-VARIABLE: EGIT_PRUNE
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# If non-empty this variable enables pruning all loose objects on each fetch.
	# This is useful if upstream rewinds and rebases branches often.

	# @ECLASS-VARIABLE: EGIT_NONBARE
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# If non-empty this variable specifies that all checkouts will be done using
	# non bare repositories. This is useful if you can't operate with bare
	# checkouts for some reason.

	# @ECLASS-VARIABLE: EGIT_NOUNPACK
	# @DEFAULT_UNSET
	# @DESCRIPTION:
	# If non-empty this variable bans unpacking of ${A} content into the srcdir.
	# Default behavior is to unpack ${A} content.

	# @FUNCTION: git-2_init_variables
	# @INTERNAL
	# @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 ${FUNCNAME} "$@"

	local esc_pn liverepo livebranch livecommit
	esc_pn=${PN//[-+]/_}

	: ${EGIT_SOURCEDIR="${S}"}

	: ${EGIT_STORE_DIR:="${PORTAGE_ACTUAL_DISTDIR-${DISTDIR}}/egit-src"}

	: ${EGIT_HAS_SUBMODULES:=}

	: ${EGIT_OPTIONS:=}

	: ${EGIT_MASTER:=master}

	liverepo=${esc_pn}_LIVE_REPO
	EGIT_REPO_URI=${!liverepo:-${EGIT_REPO_URI}}
	[[ ${EGIT_REPO_URI} ]] \|\| die "EGIT_REPO_URI must have some value"

	: ${EVCS_OFFLINE:=}

	livebranch=${esc_pn}_LIVE_BRANCH
	[[ ${!livebranch} ]] && ewarn "QA: using \"${esc_pn}_LIVE_BRANCH\" variable, you won't get any support"
	EGIT_BRANCH=${!livebranch:-${EGIT_BRANCH:-${EGIT_MASTER}}}

	livecommit=${esc_pn}_LIVE_COMMIT
	[[ ${!livecommit} ]] && ewarn "QA: using \"${esc_pn}_LIVE_COMMIT\" variable, you won't get any support"
	EGIT_COMMIT=${!livecommit:-${EGIT_COMMIT:-${EGIT_BRANCH}}}

	: ${EGIT_REPACK:=}

	: ${EGIT_PRUNE:=}
	}

	# @FUNCTION: git-2_submodules
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function wrapping the submodule initialisation and update.
	git-2_submodules() {
	debug-print-function ${FUNCNAME} "$@"
	if [[ ${EGIT_HAS_SUBMODULES} ]]; then
	if [[ ${EVCS_OFFLINE} ]]; then
	# for submodules operations we need to be online
	debug-print "${FUNCNAME}: not updating submodules in offline mode"
	return 1
	fi

	debug-print "${FUNCNAME}: working in \"${1}\""
	pushd "${EGIT_DIR}" > /dev/null \|\| die

	debug-print "${FUNCNAME}: git submodule init"
	git submodule init \|\| die
	debug-print "${FUNCNAME}: git submodule sync"
	git submodule sync \|\| die
	debug-print "${FUNCNAME}: git submodule update"
	git submodule update \|\| die

	popd > /dev/null \|\| die
	fi
	}

	# @FUNCTION: git-2_branch
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function that changes branch for the repo based on EGIT_COMMIT and
	# EGIT_BRANCH variables.
	git-2_branch() {
	debug-print-function ${FUNCNAME} "$@"

	local branchname src

	debug-print "${FUNCNAME}: working in \"${EGIT_SOURCEDIR}\""
	pushd "${EGIT_SOURCEDIR}" > /dev/null \|\| die

	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 \|\| die
	}

	# @FUNCTION: git-2_gc
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function running garbage collector on checked out tree.
	git-2_gc() {
	debug-print-function ${FUNCNAME} "$@"

	local args

	if [[ ${EGIT_REPACK} \|\| ${EGIT_PRUNE} ]]; then
	pushd "${EGIT_DIR}" > /dev/null \|\| die
	ebegin "Garbage collecting the repository"
	[[ ${EGIT_PRUNE} ]] && args='--prune'
	debug-print "${FUNCNAME}: git gc ${args}"
	git gc ${args}
	eend $?
	popd > /dev/null \|\| die
	fi
	}

	# @FUNCTION: git-2_prepare_storedir
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function preparing directory where we are going to store SCM
	# repository.
	git-2_prepare_storedir() {
	debug-print-function ${FUNCNAME} "$@"

	local clone_dir

	# 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 -m 775 -p "${EGIT_STORE_DIR}" \
	\|\| die "${FUNCNAME}: can't mkdir \"${EGIT_STORE_DIR}\""
	fi

	# allow writing into EGIT_STORE_DIR
	addwrite "${EGIT_STORE_DIR}"

	# calculate git.eclass store dir for data
	# We will try to clone the old repository,
	# and we will remove it if we don't need it anymore.
	EGIT_OLD_CLONE=
	if [[ ${EGIT_STORE_DIR} == */egit-src ]]; then
	local old_store_dir=${EGIT_STORE_DIR/%egit-src/git-src}
	local old_location=${old_store_dir}/${EGIT_PROJECT:-${PN}}

	if [[ -d ${old_location} ]]; then
	EGIT_OLD_CLONE=${old_location}
	# required to remove the old clone
	addwrite "${old_store_dir}"
	fi
	fi

	# calculate the proper store dir for data
	# If user didn't specify the EGIT_DIR, we check if he did specify
	# the EGIT_PROJECT or get the folder name from EGIT_REPO_URI.
	EGIT_REPO_URI=${EGIT_REPO_URI%/}
	if [[ ! ${EGIT_DIR} ]]; then
	if [[ ${EGIT_PROJECT} ]]; then
	clone_dir=${EGIT_PROJECT}
	else
	local strippeduri=${EGIT_REPO_URI%/.git}
	clone_dir=${strippeduri##*/}
	fi
	EGIT_DIR=${EGIT_STORE_DIR}/${clone_dir}

	if [[ ${EGIT_OLD_CLONE} && ! -d ${EGIT_DIR} ]]; then
	elog "${FUNCNAME}: ${CATEGORY}/${PF} will be cloned from old location."
	elog "It will be necessary to rebuild the package to fetch updates."
	EGIT_REPO_URI="${EGIT_OLD_CLONE} ${EGIT_REPO_URI}"
	fi
	fi
	export EGIT_DIR=${EGIT_DIR}
	debug-print "${FUNCNAME}: Storing the repo into \"${EGIT_DIR}\"."
	}

	# @FUNCTION: git-2_move_source
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function moving sources from the EGIT_DIR to EGIT_SOURCEDIR dir.
	git-2_move_source() {
	debug-print-function ${FUNCNAME} "$@"

	debug-print "${FUNCNAME}: ${MOVE_COMMAND} \"${EGIT_DIR}\" \"${EGIT_SOURCEDIR}\""
	pushd "${EGIT_DIR}" > /dev/null \|\| die
	mkdir -p "${EGIT_SOURCEDIR}" \
	\|\| die "${FUNCNAME}: failed to create ${EGIT_SOURCEDIR}"
	${MOVE_COMMAND} "${EGIT_SOURCEDIR}" \
	\|\| die "${FUNCNAME}: sync to \"${EGIT_SOURCEDIR}\" failed"
	popd > /dev/null \|\| die
	}

	# @FUNCTION: git-2_initial_clone
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function running initial clone on specified repo_uri.
	git-2_initial_clone() {
	debug-print-function ${FUNCNAME} "$@"

	local repo_uri

	EGIT_REPO_URI_SELECTED=""
	for repo_uri in ${EGIT_REPO_URI}; do
	debug-print "${FUNCNAME}: git clone ${EGIT_LOCAL_OPTIONS} \"${repo_uri}\" \"${EGIT_DIR}\""
	if git clone ${EGIT_LOCAL_OPTIONS} "${repo_uri}" "${EGIT_DIR}"; then
	# global variable containing the repo_name we will be using
	debug-print "${FUNCNAME}: EGIT_REPO_URI_SELECTED=\"${repo_uri}\""
	EGIT_REPO_URI_SELECTED="${repo_uri}"
	break
	fi
	done

	[[ ${EGIT_REPO_URI_SELECTED} ]] \
	\|\| die "${FUNCNAME}: can't fetch from ${EGIT_REPO_URI}"
	}

	# @FUNCTION: git-2_update_repo
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function running update command on specified repo_uri.
	git-2_update_repo() {
	debug-print-function ${FUNCNAME} "$@"

	local repo_uri

	if [[ ${EGIT_LOCAL_NONBARE} ]]; then
	# checkout master branch and drop all other local branches
	git checkout ${EGIT_MASTER} \|\| die "${FUNCNAME}: can't checkout master branch ${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} > /dev/null
	done
	fi

	EGIT_REPO_URI_SELECTED=""
	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}"
	if ${EGIT_UPDATE_CMD} > /dev/null; then
	# global variable containing the repo_name we will be using
	debug-print "${FUNCNAME}: EGIT_REPO_URI_SELECTED=\"${repo_uri}\""
	EGIT_REPO_URI_SELECTED="${repo_uri}"
	break
	fi
	done

	[[ ${EGIT_REPO_URI_SELECTED} ]] \
	\|\| die "${FUNCNAME}: can't update from ${EGIT_REPO_URI}"
	}

	# @FUNCTION: git-2_fetch
	# @INTERNAL
	# @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 repo_type

	[[ ${EGIT_LOCAL_NONBARE} ]] && repo_type="non-bare repository" \|\| repo_type="bare repository"

	if [[ ! -d ${EGIT_DIR} ]]; then
	git-2_initial_clone
	pushd "${EGIT_DIR}" > /dev/null \|\| die
	cursha=$(git rev-parse ${UPSTREAM_BRANCH})
	echo "GIT NEW clone -->"
	echo " repository: ${EGIT_REPO_URI_SELECTED}"
	echo " at the commit: ${cursha}"

	popd > /dev/null \|\| die
	elif [[ ${EVCS_OFFLINE} ]]; then
	pushd "${EGIT_DIR}" > /dev/null \|\| die
	cursha=$(git rev-parse ${UPSTREAM_BRANCH})
	echo "GIT offline update -->"
	echo " repository: $(git config remote.origin.url)"
	echo " at the commit: ${cursha}"
	popd > /dev/null \|\| die
	else
	pushd "${EGIT_DIR}" > /dev/null \|\| die
	oldsha=$(git rev-parse ${UPSTREAM_BRANCH})
	git-2_update_repo
	cursha=$(git rev-parse ${UPSTREAM_BRANCH})

	# fetch updates
	echo "GIT update -->"
	echo " repository: ${EGIT_REPO_URI_SELECTED}"
	# write out message based on the revisions
	if [[ "${oldsha}" != "${cursha}" ]]; then
	echo " updating from commit: ${oldsha}"
	echo " to commit: ${cursha}"
	else
	echo " at the commit: ${cursha}"
	fi

	# print nice statistic of what was changed
	git --no-pager diff --stat ${oldsha}..${UPSTREAM_BRANCH}
	popd > /dev/null \|\| die
	fi
	# export the version the repository is at
	export EGIT_VERSION="${cursha}"
	# log the repo state
	[[ ${EGIT_COMMIT} != ${EGIT_BRANCH} ]] \
	&& echo " commit: ${EGIT_COMMIT}"
	echo " branch: ${EGIT_BRANCH}"
	echo " storage directory: \"${EGIT_DIR}\""
	echo " checkout type: ${repo_type}"

	# Cleanup after git.eclass
	if [[ ${EGIT_OLD_CLONE} ]]; then
	einfo "${FUNCNAME}: removing old clone in ${EGIT_OLD_CLONE}."
	rm -rf "${EGIT_OLD_CLONE}"
	fi
	}

	# @FUNCTION: git_bootstrap
	# @INTERNAL
	# @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 [[ ${EGIT_BOOTSTRAP} ]]; then
	pushd "${EGIT_SOURCEDIR}" > /dev/null \|\| die
	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 \|\| die
	fi
	}

	# @FUNCTION: git-2_migrate_repository
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function migrating between bare and normal checkout repository.
	# This is based on usage of EGIT_SUBMODULES, at least until they
	# start to work with bare checkouts sanely.
	# This function also set some global variables that differ between
	# bare and non-bare checkout.
	git-2_migrate_repository() {
	debug-print-function ${FUNCNAME} "$@"

	local bare returnstate

	# first find out if we have submodules
	# or user explicitly wants us to use non-bare clones
	if ! [[ ${EGIT_HAS_SUBMODULES} \|\| ${EGIT_NONBARE} ]]; then
	bare=1
	fi

	# test if we already have some repo and if so find out if we have
	# to migrate the data
	if [[ -d ${EGIT_DIR} ]]; then
	if [[ ${bare} && -d ${EGIT_DIR}/.git ]]; then
	debug-print "${FUNCNAME}: converting \"${EGIT_DIR}\" to bare copy"

	ebegin "Converting \"${EGIT_DIR}\" from non-bare to bare copy"
	mv "${EGIT_DIR}/.git" "${EGIT_DIR}.bare"
	export GIT_DIR="${EGIT_DIR}.bare"
	git config core.bare true > /dev/null
	returnstate=$?
	unset GIT_DIR
	rm -rf "${EGIT_DIR}"
	mv "${EGIT_DIR}.bare" "${EGIT_DIR}"
	eend ${returnstate}
	elif [[ ! ${bare} && ! -d ${EGIT_DIR}/.git ]]; then
	debug-print "${FUNCNAME}: converting \"${EGIT_DIR}\" to non-bare copy"

	ebegin "Converting \"${EGIT_DIR}\" from bare to non-bare copy"
	git clone -l "${EGIT_DIR}" "${EGIT_DIR}.nonbare" > /dev/null
	returnstate=$?
	rm -rf "${EGIT_DIR}"
	mv "${EGIT_DIR}.nonbare" "${EGIT_DIR}"
	eend ${returnstate}
	fi
	fi
	if [[ ${returnstate} -ne 0 ]]; then
	debug-print "${FUNCNAME}: converting \"${EGIT_DIR}\" failed, removing to start from scratch"

	# migration failed, remove the EGIT_DIR to play it safe
	einfo "Migration failed, removing \"${EGIT_DIR}\" to start from scratch."
	rm -rf "${EGIT_DIR}"
	fi

	# set various options to work with both targets
	if [[ ${bare} ]]; then
	debug-print "${FUNCNAME}: working in bare repository for \"${EGIT_DIR}\""
	EGIT_LOCAL_OPTIONS+="${EGIT_OPTIONS} --bare"
	MOVE_COMMAND="git clone -l -s -n ${EGIT_DIR// /\\ }"
	EGIT_UPDATE_CMD="git fetch -t -f -u origin ${EGIT_BRANCH}:${EGIT_BRANCH}"
	UPSTREAM_BRANCH="${EGIT_BRANCH}"
	EGIT_LOCAL_NONBARE=
	else
	debug-print "${FUNCNAME}: working in bare repository for non-bare \"${EGIT_DIR}\""
	MOVE_COMMAND="cp -pPR ."
	EGIT_LOCAL_OPTIONS="${EGIT_OPTIONS}"
	EGIT_UPDATE_CMD="git pull -f -u ${EGIT_OPTIONS}"
	UPSTREAM_BRANCH="origin/${EGIT_BRANCH}"
	EGIT_LOCAL_NONBARE="true"
	fi
	}

	# @FUNCTION: git-2_cleanup
	# @INTERNAL
	# @DESCRIPTION:
	# Internal function cleaning up all the global variables
	# that are not required after the unpack has been done.
	git-2_cleanup() {
	debug-print-function ${FUNCNAME} "$@"

	# Here we can unset only variables that are GLOBAL
	# defined by the eclass, BUT NOT subject to change
	# by user (like EGIT_PROJECT).
	# If ebuild writer polutes his environment it is
	# his problem only.
	unset EGIT_DIR
	unset MOVE_COMMAND
	unset EGIT_LOCAL_OPTIONS
	unset EGIT_UPDATE_CMD
	unset UPSTREAM_BRANCH
	unset EGIT_LOCAL_NONBARE
	}

	# @FUNCTION: git-2_src_unpack
	# @DESCRIPTION:
	# Default git src_unpack function.
	git-2_src_unpack() {
	debug-print-function ${FUNCNAME} "$@"

	git-2_init_variables
	git-2_prepare_storedir
	git-2_migrate_repository
	git-2_fetch "$@"
	git-2_gc
	git-2_submodules
	git-2_move_source
	git-2_branch
	git-2_bootstrap
	git-2_cleanup
	echo ">>> Unpacked to ${EGIT_SOURCEDIR}"

	# Users can specify some SRC_URI and we should
	# unpack the files too.
	if [[ ! ${EGIT_NOUNPACK} ]]; then
	if has ${EAPI:-0} 0 1; then
	[[ ${A} ]] && unpack ${A}
	else
	default_src_unpack
	fi
	fi
	}