git-submodule.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # git-submodule.sh: add, init, update or list git submodules
 #
 # Copyright (c) 2007 Lars Hjemli

 dashless=$(basename "$0" | sed -e 's/-/ /')
 USAGE="[--quiet] [--cached]
    or: $dashless [--quiet] add [-b <branch>] [-f|--force] [--name <name>] [--reference <repository>] [--] <repository> [<path>]
    or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
    or: $dashless [--quiet] init [--] [<path>...]
    or: $dashless [--quiet] deinit [-f|--force] (--all| [--] <path>...)
    or: $dashless [--quiet] update [--init] [--remote] [-N|--no-fetch] [-f|--force] [--checkout|--merge|--rebase] [--[no-]recommend-shallow] [--reference <repository>] [--recursive] [--[no-]single-branch] [--] [<path>...]
    or: $dashless [--quiet] set-branch (--default|--branch <branch>) [--] <path>
    or: $dashless [--quiet] set-url [--] <path> <newurl>
    or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
    or: $dashless [--quiet] foreach [--recursive] <command>
    or: $dashless [--quiet] sync [--recursive] [--] [<path>...]
    or: $dashless [--quiet] absorbgitdirs [--] [<path>...]"
 OPTIONS_SPEC=
 SUBDIRECTORY_OK=Yes
 . git-sh-setup
 require_work_tree
 wt_prefix=$(git rev-parse --show-prefix)
 cd_to_toplevel

 # Tell the rest of git that any URLs we get don't come
 # directly from the user, so it can apply policy as appropriate.
 GIT_PROTOCOL_FROM_USER=0
 export GIT_PROTOCOL_FROM_USER

 command=
 branch=
 force=
 reference=
 cached=
 recursive=
 init=
 require_init=
 files=
 remote=
 nofetch=
 update=
 prefix=
 custom_name=
 depth=
 progress=
 dissociate=
 single_branch=
 jobs=
 recommend_shallow=

 die_if_unmatched ()
 {
 	if test "$1" = "#unmatched"
 	then
 		exit ${2:-1}
 	fi
 }

 isnumber()
 {
 	n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
 }

 # Given a full hex object ID, is this the zero OID?
 is_zero_oid () {
 	echo "$1" | sane_egrep '^0+$' >/dev/null 2>&1
 }

 # Sanitize the local git environment for use within a submodule. We
 # can't simply use clear_local_git_env since we want to preserve some
 # of the settings from GIT_CONFIG_PARAMETERS.
 sanitize_submodule_env()
 {
 	save_config=$GIT_CONFIG_PARAMETERS
 	clear_local_git_env
 	GIT_CONFIG_PARAMETERS=$save_config
 	export GIT_CONFIG_PARAMETERS
 }

 #
 # Add a new submodule to the working tree, .gitmodules and the index
 #
 # $@ = repo path
 #
 # optional branch is stored in global branch variable
 #
 cmd_add()
 {
 	# parse $args after "submodule ... add".
 	reference_path=
 	while test $# -ne 0
 	do
 		case "$1" in
 		-b | --branch)
 			case "$2" in '') usage ;; esac
 			branch=$2
 			shift
 			;;
 		-f | --force)
 			force=$1
 			;;
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		--progress)
 			progress=1
 			;;
 		--reference)
 			case "$2" in '') usage ;; esac
 			reference_path=$2
 			shift
 			;;
 		--reference=*)
 			reference_path="${1#--reference=}"
 			;;
 		--dissociate)
 			dissociate=1
 			;;
 		--name)
 			case "$2" in '') usage ;; esac
 			custom_name=$2
 			shift
 			;;
 		--depth)
 			case "$2" in '') usage ;; esac
 			depth="--depth=$2"
 			shift
 			;;
 		--depth=*)
 			depth=$1
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	if ! git submodule--helper config --check-writeable >/dev/null 2>&1
 	then
 		 die "$(eval_gettext "please make sure that the .gitmodules file is in the working tree")"
 	fi

 	if test -n "$reference_path"
 	then
 		is_absolute_path "$reference_path" ||
 		reference_path="$wt_prefix$reference_path"

 		reference="--reference=$reference_path"
 	fi

 	repo=$1
 	sm_path=$2

 	if test -z "$sm_path"; then
 		sm_path=$(printf '%s\n' "$repo" |
 			sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
 	fi

 	if test -z "$repo" || test -z "$sm_path"; then
 		usage
 	fi

 	is_absolute_path "$sm_path" || sm_path="$wt_prefix$sm_path"

 	# assure repo is absolute or relative to parent
 	case "$repo" in
 	./*|../*)
 		test -z "$wt_prefix" ||
 		die "$(gettext "Relative path can only be used from the toplevel of the working tree")"

 		# dereference source url relative to parent's url
 		realrepo=$(git submodule--helper resolve-relative-url "$repo") || exit
 		;;
 	*:*|/*)
 		# absolute url
 		realrepo=$repo
 		;;
 	*)
 		die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./|../")"
 	;;
 	esac

 	# normalize path:
 	# multiple //; leading ./; /./; /../; trailing /
 	sm_path=$(printf '%s/\n' "$sm_path" |
 		sed -e '
 			s|//*|/|g
 			s|^\(\./\)*||
 			s|/\(\./\)*|/|g
 			:start
 			s|\([^/]*\)/\.\./||
 			tstart
 			s|/*$||
 		')
 	if test -z "$force"
 	then
 		git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
 		die "$(eval_gettext "'\$sm_path' already exists in the index")"
 	else
 		git ls-files -s "$sm_path" | sane_grep -v "^160000" > /dev/null 2>&1 &&
 		die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")"
 	fi

 	if test -d "$sm_path" &&
 		test -z $(git -C "$sm_path" rev-parse --show-cdup 2>/dev/null)
 	then
 	    git -C "$sm_path" rev-parse --verify -q HEAD >/dev/null ||
 	    die "$(eval_gettext "'\$sm_path' does not have a commit checked out")"
 	fi

 	if test -z "$force"
 	then
 	    dryerr=$(git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" 2>&1 >/dev/null)
 	    res=$?
 	    if test $res -ne 0
 	    then
 		 echo >&2 "$dryerr"
 		 exit $res
 	    fi
 	fi

 	if test -n "$custom_name"
 	then
 		sm_name="$custom_name"
 	else
 		sm_name="$sm_path"
 	fi

 	if ! git submodule--helper check-name "$sm_name"
 	then
 		die "$(eval_gettext "'$sm_name' is not a valid submodule name")"
 	fi

 	# perhaps the path exists and is already a git repo, else clone it
 	if test -e "$sm_path"
 	then
 		if test -d "$sm_path"/.git || test -f "$sm_path"/.git
 		then
 			eval_gettextln "Adding existing repo at '\$sm_path' to the index"
 		else
 			die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
 		fi

 	else
 		if test -d ".git/modules/$sm_name"
 		then
 			if test -z "$force"
 			then
 				eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
 				GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v | grep '(fetch)' | sed -e s,^,"  ", -e s,' (fetch)',, >&2
 				die "$(eval_gettextln "\
 If you want to reuse this local git directory instead of cloning again from
   \$realrepo
 use the '--force' option. If the local git directory is not the correct repo
 or you are unsure what this means choose another name with the '--name' option.")"
 			else
 				eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
 			fi
 		fi
 		git submodule--helper clone ${GIT_QUIET:+--quiet} ${progress:+"--progress"} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" ${reference:+"$reference"} ${dissociate:+"--dissociate"} ${depth:+"$depth"} || exit
 		(
 			sanitize_submodule_env
 			cd "$sm_path" &&
 			# ash fails to wordsplit ${branch:+-b "$branch"...}
 			case "$branch" in
 			'') git checkout -f -q ;;
 			?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
 			esac
 		) || die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
 	fi
 	git config submodule."$sm_name".url "$realrepo"

 	git add --no-warn-embedded-repo $force "$sm_path" ||
 	die "$(eval_gettext "Failed to add submodule '\$sm_path'")"

 	git submodule--helper config submodule."$sm_name".path "$sm_path" &&
 	git submodule--helper config submodule."$sm_name".url "$repo" &&
 	if test -n "$branch"
 	then
 		git submodule--helper config submodule."$sm_name".branch "$branch"
 	fi &&
 	git add --force .gitmodules ||
 	die "$(eval_gettext "Failed to register submodule '\$sm_path'")"

 	# NEEDSWORK: In a multi-working-tree world, this needs to be
 	# set in the per-worktree config.
 	if git config --get submodule.active >/dev/null
 	then
 		# If the submodule being adding isn't already covered by the
 		# current configured pathspec, set the submodule's active flag
 		if ! git submodule--helper is-active "$sm_path"
 		then
 			git config submodule."$sm_name".active "true"
 		fi
 	else
 		git config submodule."$sm_name".active "true"
 	fi
 }

 #
 # Execute an arbitrary command sequence in each checked out
 # submodule
 #
 # $@ = command to execute
 #
 cmd_foreach()
 {
 	# parse $args after "submodule ... foreach".
 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		--recursive)
 			recursive=1
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper foreach ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
 }

 #
 # Register submodules in .git/config
 #
 # $@ = requested paths (default to all)
 #
 cmd_init()
 {
 	# parse $args after "submodule ... init".
 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet} -- "$@"
 }

 #
 # Unregister submodules from .git/config and remove their work tree
 #
 cmd_deinit()
 {
 	# parse $args after "submodule ... deinit".
 	deinit_all=
 	while test $# -ne 0
 	do
 		case "$1" in
 		-f|--force)
 			force=$1
 			;;
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		--all)
 			deinit_all=t
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} -- "$@"
 }

 is_tip_reachable () (
 	sanitize_submodule_env &&
 	cd "$1" &&
 	rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
 	test -z "$rev"
 )

 # usage: fetch_in_submodule <module_path> [<depth>] [<sha1>]
 # Because arguments are positional, use an empty string to omit <depth>
 # but include <sha1>.
 fetch_in_submodule () (
 	sanitize_submodule_env &&
 	cd "$1" &&
 	if test $# -eq 3
 	then
 		echo "$3" | git fetch ${GIT_QUIET:+--quiet} --stdin ${2:+"$2"}
 	else
 		git fetch ${GIT_QUIET:+--quiet} ${2:+"$2"}
 	fi
 )

 #
 # Update each submodule path to correct revision, using clone and checkout as needed
 #
 # $@ = requested paths (default to all)
 #
 cmd_update()
 {
 	# parse $args after "submodule ... update".
 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		-v)
 			unset GIT_QUIET
 			;;
 		--progress)
 			progress=1
 			;;
 		-i|--init)
 			init=1
 			;;
 		--require-init)
 			init=1
 			require_init=1
 			;;
 		--remote)
 			remote=1
 			;;
 		-N|--no-fetch)
 			nofetch=1
 			;;
 		-f|--force)
 			force=$1
 			;;
 		-r|--rebase)
 			update="rebase"
 			;;
 		--reference)
 			case "$2" in '') usage ;; esac
 			reference="--reference=$2"
 			shift
 			;;
 		--reference=*)
 			reference="$1"
 			;;
 		--dissociate)
 			dissociate=1
 			;;
 		-m|--merge)
 			update="merge"
 			;;
 		--recursive)
 			recursive=1
 			;;
 		--checkout)
 			update="checkout"
 			;;
 		--recommend-shallow)
 			recommend_shallow="--recommend-shallow"
 			;;
 		--no-recommend-shallow)
 			recommend_shallow="--no-recommend-shallow"
 			;;
 		--depth)
 			case "$2" in '') usage ;; esac
 			depth="--depth=$2"
 			shift
 			;;
 		--depth=*)
 			depth=$1
 			;;
 		-j|--jobs)
 			case "$2" in '') usage ;; esac
 			jobs="--jobs=$2"
 			shift
 			;;
 		--jobs=*)
 			jobs=$1
 			;;
 		--single-branch)
 			single_branch="--single-branch"
 			;;
 		--no-single-branch)
 			single_branch="--no-single-branch"
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	if test -n "$init"
 	then
 		cmd_init "--" "$@" || return
 	fi

 	{
 	git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
 		${progress:+"--progress"} \
 		${wt_prefix:+--prefix "$wt_prefix"} \
 		${prefix:+--recursive-prefix "$prefix"} \
 		${update:+--update "$update"} \
 		${reference:+"$reference"} \
 		${dissociate:+"--dissociate"} \
 		${depth:+--depth "$depth"} \
 		${require_init:+--require-init} \
 		$single_branch \
 		$recommend_shallow \
 		$jobs \
 		-- \
 		"$@" || echo "#unmatched" $?
 	} | {
 	err=
 	while read -r quickabort sha1 just_cloned sm_path
 	do
 		die_if_unmatched "$quickabort" "$sha1"

 		git submodule--helper ensure-core-worktree "$sm_path" || exit 1

 		update_module=$(git submodule--helper update-module-mode $just_cloned "$sm_path" $update)

 		displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")

 		if test $just_cloned -eq 1
 		then
 			subsha1=
 		else
 			subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
 				git rev-parse --verify HEAD) ||
 			die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
 		fi

 		if test -n "$remote"
 		then
 			branch=$(git submodule--helper remote-branch "$sm_path")
 			if test -z "$nofetch"
 			then
 				# Fetch remote before determining tracking $sha1
 				fetch_in_submodule "$sm_path" $depth ||
 				die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
 			fi
 			remote_name=$(sanitize_submodule_env; cd "$sm_path" && git submodule--helper print-default-remote)
 			sha1=$(sanitize_submodule_env; cd "$sm_path" &&
 				git rev-parse --verify "${remote_name}/${branch}") ||
 			die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
 		fi

 		if test "$subsha1" != "$sha1" || test -n "$force"
 		then
 			subforce=$force
 			# If we don't already have a -f flag and the submodule has never been checked out
 			if test -z "$subsha1" && test -z "$force"
 			then
 				subforce="-f"
 			fi

 			if test -z "$nofetch"
 			then
 				# Run fetch only if $sha1 isn't present or it
 				# is not reachable from a ref.
 				is_tip_reachable "$sm_path" "$sha1" ||
 				fetch_in_submodule "$sm_path" $depth ||
 				say "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'; trying to directly fetch \$sha1:")"

 				# Now we tried the usual fetch, but $sha1 may
 				# not be reachable from any of the refs
 				is_tip_reachable "$sm_path" "$sha1" ||
 				fetch_in_submodule "$sm_path" "$depth" "$sha1" ||
 				die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
 			fi

 			must_die_on_failure=
 			case "$update_module" in
 			checkout)
 				command="git checkout $subforce -q"
 				die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
 				say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
 				;;
 			rebase)
 				command="git rebase ${GIT_QUIET:+--quiet}"
 				die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
 				say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
 				must_die_on_failure=yes
 				;;
 			merge)
 				command="git merge ${GIT_QUIET:+--quiet}"
 				die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
 				say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
 				must_die_on_failure=yes
 				;;
 			!*)
 				command="${update_module#!}"
 				die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
 				say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
 				must_die_on_failure=yes
 				;;
 			*)
 				die "$(eval_gettext "Invalid update mode '$update_module' for submodule path '$path'")"
 			esac

 			if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
 			then
 				say "$say_msg"
 			elif test -n "$must_die_on_failure"
 			then
 				die_with_status 2 "$die_msg"
 			else
 				err="${err};$die_msg"
 				continue
 			fi
 		fi

 		if test -n "$recursive"
 		then
 			(
 				prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
 				wt_prefix=
 				sanitize_submodule_env
 				cd "$sm_path" &&
 				eval cmd_update
 			)
 			res=$?
 			if test $res -gt 0
 			then
 				die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
 				if test $res -ne 2
 				then
 					err="${err};$die_msg"
 					continue
 				else
 					die_with_status $res "$die_msg"
 				fi
 			fi
 		fi
 	done

 	if test -n "$err"
 	then
 		OIFS=$IFS
 		IFS=';'
 		for e in $err
 		do
 			if test -n "$e"
 			then
 				echo >&2 "$e"
 			fi
 		done
 		IFS=$OIFS
 		exit 1
 	fi
 	}
 }

 #
 # Configures a submodule's default branch
 #
 # $@ = requested path
 #
 cmd_set_branch() {
 	default=
 	branch=

 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			# we don't do anything with this but we need to accept it
 			;;
 		-d|--default)
 			default=1
 			;;
 		-b|--branch)
 			case "$2" in '') usage ;; esac
 			branch=$2
 			shift
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper set-branch ${GIT_QUIET:+--quiet} ${branch:+--branch "$branch"} ${default:+--default} -- "$@"
 }

 #
 # Configures a submodule's remote url
 #
 # $@ = requested path, requested url
 #
 cmd_set_url() {
 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper set-url ${GIT_QUIET:+--quiet} -- "$@"
 }

 #
 # Show commit summary for submodules in index or working tree
 #
 # If '--cached' is given, show summary between index and given commit,
 # or between working tree and given commit
 #
 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 #
 cmd_summary() {
 	summary_limit=-1
 	for_status=
 	diff_cmd=diff-index

 	# parse $args after "submodule ... summary".
 	while test $# -ne 0
 	do
 		case "$1" in
 		--cached)
 			cached="$1"
 			;;
 		--files)
 			files="$1"
 			;;
 		--for-status)
 			for_status="$1"
 			;;
 		-n|--summary-limit)
 			summary_limit="$2"
 			isnumber "$summary_limit" || usage
 			shift
 			;;
 		--summary-limit=*)
 			summary_limit="${1#--summary-limit=}"
 			isnumber "$summary_limit" || usage
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper summary ${prefix:+--prefix "$prefix"} ${files:+--files} ${cached:+--cached} ${for_status:+--for-status} ${summary_limit:+-n $summary_limit} -- "$@"
 }
 #
 # List all submodules, prefixed with:
 #  - submodule not initialized
 #  + different revision checked out
 #
 # If --cached was specified the revision in the index will be printed
 # instead of the currently checked out revision.
 #
 # $@ = requested paths (default to all)
 #
 cmd_status()
 {
 	# parse $args after "submodule ... status".
 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			GIT_QUIET=1
 			;;
 		--cached)
 			cached=1
 			;;
 		--recursive)
 			recursive=1
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} -- "$@"
 }
 #
 # Sync remote urls for submodules
 # This makes the value for remote.$remote.url match the value
 # specified in .gitmodules.
 #
 cmd_sync()
 {
 	while test $# -ne 0
 	do
 		case "$1" in
 		-q|--quiet)
 			GIT_QUIET=1
 			shift
 			;;
 		--recursive)
 			recursive=1
 			shift
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 	done

 	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
 }

 cmd_absorbgitdirs()
 {
 	git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
 }

 # This loop parses the command line arguments to find the
 # subcommand name to dispatch.  Parsing of the subcommand specific
 # options are primarily done by the subcommand implementations.
 # Subcommand specific options such as --branch and --cached are
 # parsed here as well, for backward compatibility.

 while test $# != 0 && test -z "$command"
 do
 	case "$1" in
 	add | foreach | init | deinit | update | set-branch | set-url | status | summary | sync | absorbgitdirs)
 		command=$1
 		;;
 	-q|--quiet)
 		GIT_QUIET=1
 		;;
 	-b|--branch)
 		case "$2" in
 		'')
 			usage
 			;;
 		esac
 		branch="$2"; shift
 		;;
 	--cached)
 		cached="$1"
 		;;
 	--)
 		break
 		;;
 	-*)
 		usage
 		;;
 	*)
 		break
 		;;
 	esac
 	shift
 done

 # No command word defaults to "status"
 if test -z "$command"
 then
     if test $# = 0
     then
 	command=status
     else
 	usage
     fi
 fi

 # "-b branch" is accepted only by "add" and "set-branch"
 if test -n "$branch" && (test "$command" != add || test "$command" != set-branch)
 then
 	usage
 fi

 # "--cached" is accepted only by "status" and "summary"
 if test -n "$cached" && test "$command" != status && test "$command" != summary
 then
 	usage
 fi

 "cmd_$(echo $command | sed -e s/-/_/g)" "$@"
	#!/bin/sh
	#
	# git-submodule.sh: add, init, update or list git submodules
	#
	# Copyright (c) 2007 Lars Hjemli

	dashless=$(basename "$0" \| sed -e 's/-/ /')
	USAGE="[--quiet] [--cached]
	or: $dashless [--quiet] add [-b <branch>] [-f\|--force] [--name <name>] [--reference <repository>] [--] <repository> [<path>]
	or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
	or: $dashless [--quiet] init [--] [<path>...]
	or: $dashless [--quiet] deinit [-f\|--force] (--all\| [--] <path>...)
	or: $dashless [--quiet] update [--init] [--remote] [-N\|--no-fetch] [-f\|--force] [--checkout\|--merge\|--rebase] [--[no-]recommend-shallow] [--reference <repository>] [--recursive] [--[no-]single-branch] [--] [<path>...]
	or: $dashless [--quiet] set-branch (--default\|--branch <branch>) [--] <path>
	or: $dashless [--quiet] set-url [--] <path> <newurl>
	or: $dashless [--quiet] summary [--cached\|--files] [--summary-limit <n>] [commit] [--] [<path>...]
	or: $dashless [--quiet] foreach [--recursive] <command>
	or: $dashless [--quiet] sync [--recursive] [--] [<path>...]
	or: $dashless [--quiet] absorbgitdirs [--] [<path>...]"
	OPTIONS_SPEC=
	SUBDIRECTORY_OK=Yes
	. git-sh-setup
	require_work_tree
	wt_prefix=$(git rev-parse --show-prefix)
	cd_to_toplevel

	# Tell the rest of git that any URLs we get don't come
	# directly from the user, so it can apply policy as appropriate.
	GIT_PROTOCOL_FROM_USER=0
	export GIT_PROTOCOL_FROM_USER

	command=
	branch=
	force=
	reference=
	cached=
	recursive=
	init=
	require_init=
	files=
	remote=
	nofetch=
	update=
	prefix=
	custom_name=
	depth=
	progress=
	dissociate=
	single_branch=
	jobs=
	recommend_shallow=

	die_if_unmatched ()
	{
	if test "$1" = "#unmatched"
	then
	exit ${2:-1}
	fi
	}

	isnumber()
	{
	n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
	}

	# Given a full hex object ID, is this the zero OID?
	is_zero_oid () {
	echo "$1" \| sane_egrep '^0+$' >/dev/null 2>&1
	}

	# Sanitize the local git environment for use within a submodule. We
	# can't simply use clear_local_git_env since we want to preserve some
	# of the settings from GIT_CONFIG_PARAMETERS.
	sanitize_submodule_env()
	{
	save_config=$GIT_CONFIG_PARAMETERS
	clear_local_git_env
	GIT_CONFIG_PARAMETERS=$save_config
	export GIT_CONFIG_PARAMETERS
	}

	#
	# Add a new submodule to the working tree, .gitmodules and the index
	#
	# $@ = repo path
	#
	# optional branch is stored in global branch variable
	#
	cmd_add()
	{
	# parse $args after "submodule ... add".
	reference_path=
	while test $# -ne 0
	do
	case "$1" in
	-b \| --branch)
	case "$2" in '') usage ;; esac
	branch=$2
	shift
	;;
	-f \| --force)
	force=$1
	;;
	-q\|--quiet)
	GIT_QUIET=1
	;;
	--progress)
	progress=1
	;;
	--reference)
	case "$2" in '') usage ;; esac
	reference_path=$2
	shift
	;;
	--reference=*)
	reference_path="${1#--reference=}"
	;;
	--dissociate)
	dissociate=1
	;;
	--name)
	case "$2" in '') usage ;; esac
	custom_name=$2
	shift
	;;
	--depth)
	case "$2" in '') usage ;; esac
	depth="--depth=$2"
	shift
	;;
	--depth=*)
	depth=$1
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	if ! git submodule--helper config --check-writeable >/dev/null 2>&1
	then
	die "$(eval_gettext "please make sure that the .gitmodules file is in the working tree")"
	fi

	if test -n "$reference_path"
	then
	is_absolute_path "$reference_path" \|\|
	reference_path="$wt_prefix$reference_path"

	reference="--reference=$reference_path"
	fi

	repo=$1
	sm_path=$2

	if test -z "$sm_path"; then
	sm_path=$(printf '%s\n' "$repo" \|
	sed -e 's\|/$\|\|' -e 's\|:/\.git$\|\|' -e 's\|.*[/:]\|\|g')
	fi

	if test -z "$repo" \|\| test -z "$sm_path"; then
	usage
	fi

	is_absolute_path "$sm_path" \|\| sm_path="$wt_prefix$sm_path"

	# assure repo is absolute or relative to parent
	case "$repo" in
	./\|../)
	test -z "$wt_prefix" \|\|
	die "$(gettext "Relative path can only be used from the toplevel of the working tree")"

	# dereference source url relative to parent's url
	realrepo=$(git submodule--helper resolve-relative-url "$repo") \|\| exit
	;;
	:\|/*)
	# absolute url
	realrepo=$repo
	;;
	*)
	die "$(eval_gettext "repo URL: '\$repo' must be absolute or begin with ./\|../")"
	;;
	esac

	# normalize path:
	# multiple //; leading ./; /./; /../; trailing /
	sm_path=$(printf '%s/\n' "$sm_path" \|
	sed -e '
	s\|//*\|/\|g
	s\|^\(\./\)*\|\|
	s\|/\(\./\)*\|/\|g
	:start
	s\|\([^/]*\)/\.\./\|\|
	tstart
	s\|/*$\|\|
	')
	if test -z "$force"
	then
	git ls-files --error-unmatch "$sm_path" > /dev/null 2>&1 &&
	die "$(eval_gettext "'\$sm_path' already exists in the index")"
	else
	git ls-files -s "$sm_path" \| sane_grep -v "^160000" > /dev/null 2>&1 &&
	die "$(eval_gettext "'\$sm_path' already exists in the index and is not a submodule")"
	fi

	if test -d "$sm_path" &&
	test -z $(git -C "$sm_path" rev-parse --show-cdup 2>/dev/null)
	then
	git -C "$sm_path" rev-parse --verify -q HEAD >/dev/null \|\|
	die "$(eval_gettext "'\$sm_path' does not have a commit checked out")"
	fi

	if test -z "$force"
	then
	dryerr=$(git add --dry-run --ignore-missing --no-warn-embedded-repo "$sm_path" 2>&1 >/dev/null)
	res=$?
	if test $res -ne 0
	then
	echo >&2 "$dryerr"
	exit $res
	fi
	fi

	if test -n "$custom_name"
	then
	sm_name="$custom_name"
	else
	sm_name="$sm_path"
	fi

	if ! git submodule--helper check-name "$sm_name"
	then
	die "$(eval_gettext "'$sm_name' is not a valid submodule name")"
	fi

	# perhaps the path exists and is already a git repo, else clone it
	if test -e "$sm_path"
	then
	if test -d "$sm_path"/.git \|\| test -f "$sm_path"/.git
	then
	eval_gettextln "Adding existing repo at '\$sm_path' to the index"
	else
	die "$(eval_gettext "'\$sm_path' already exists and is not a valid git repo")"
	fi

	else
	if test -d ".git/modules/$sm_name"
	then
	if test -z "$force"
	then
	eval_gettextln >&2 "A git directory for '\$sm_name' is found locally with remote(s):"
	GIT_DIR=".git/modules/$sm_name" GIT_WORK_TREE=. git remote -v \| grep '(fetch)' \| sed -e s,^," ", -e s,' (fetch)',, >&2
	die "$(eval_gettextln "\
	If you want to reuse this local git directory instead of cloning again from
	\$realrepo
	use the '--force' option. If the local git directory is not the correct repo
	or you are unsure what this means choose another name with the '--name' option.")"
	else
	eval_gettextln "Reactivating local git directory for submodule '\$sm_name'."
	fi
	fi
	git submodule--helper clone ${GIT_QUIET:+--quiet} ${progress:+"--progress"} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" ${reference:+"$reference"} ${dissociate:+"--dissociate"} ${depth:+"$depth"} \|\| exit
	(
	sanitize_submodule_env
	cd "$sm_path" &&
	# ash fails to wordsplit ${branch:+-b "$branch"...}
	case "$branch" in
	'') git checkout -f -q ;;
	?*) git checkout -f -q -B "$branch" "origin/$branch" ;;
	esac
	) \|\| die "$(eval_gettext "Unable to checkout submodule '\$sm_path'")"
	fi
	git config submodule."$sm_name".url "$realrepo"

	git add --no-warn-embedded-repo $force "$sm_path" \|\|
	die "$(eval_gettext "Failed to add submodule '\$sm_path'")"

	git submodule--helper config submodule."$sm_name".path "$sm_path" &&
	git submodule--helper config submodule."$sm_name".url "$repo" &&
	if test -n "$branch"
	then
	git submodule--helper config submodule."$sm_name".branch "$branch"
	fi &&
	git add --force .gitmodules \|\|
	die "$(eval_gettext "Failed to register submodule '\$sm_path'")"

	# NEEDSWORK: In a multi-working-tree world, this needs to be
	# set in the per-worktree config.
	if git config --get submodule.active >/dev/null
	then
	# If the submodule being adding isn't already covered by the
	# current configured pathspec, set the submodule's active flag
	if ! git submodule--helper is-active "$sm_path"
	then
	git config submodule."$sm_name".active "true"
	fi
	else
	git config submodule."$sm_name".active "true"
	fi
	}

	#
	# Execute an arbitrary command sequence in each checked out
	# submodule
	#
	# $@ = command to execute
	#
	cmd_foreach()
	{
	# parse $args after "submodule ... foreach".
	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	GIT_QUIET=1
	;;
	--recursive)
	recursive=1
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper foreach ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
	}

	#
	# Register submodules in .git/config
	#
	# $@ = requested paths (default to all)
	#
	cmd_init()
	{
	# parse $args after "submodule ... init".
	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	GIT_QUIET=1
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper init ${GIT_QUIET:+--quiet} -- "$@"
	}

	#
	# Unregister submodules from .git/config and remove their work tree
	#
	cmd_deinit()
	{
	# parse $args after "submodule ... deinit".
	deinit_all=
	while test $# -ne 0
	do
	case "$1" in
	-f\|--force)
	force=$1
	;;
	-q\|--quiet)
	GIT_QUIET=1
	;;
	--all)
	deinit_all=t
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit ${GIT_QUIET:+--quiet} ${prefix:+--prefix "$prefix"} ${force:+--force} ${deinit_all:+--all} -- "$@"
	}

	is_tip_reachable () (
	sanitize_submodule_env &&
	cd "$1" &&
	rev=$(git rev-list -n 1 "$2" --not --all 2>/dev/null) &&
	test -z "$rev"
	)

	# usage: fetch_in_submodule <module_path> [<depth>] [<sha1>]
	# Because arguments are positional, use an empty string to omit <depth>
	# but include <sha1>.
	fetch_in_submodule () (
	sanitize_submodule_env &&
	cd "$1" &&
	if test $# -eq 3
	then
	echo "$3" \| git fetch ${GIT_QUIET:+--quiet} --stdin ${2:+"$2"}
	else
	git fetch ${GIT_QUIET:+--quiet} ${2:+"$2"}
	fi
	)

	#
	# Update each submodule path to correct revision, using clone and checkout as needed
	#
	# $@ = requested paths (default to all)
	#
	cmd_update()
	{
	# parse $args after "submodule ... update".
	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	GIT_QUIET=1
	;;
	-v)
	unset GIT_QUIET
	;;
	--progress)
	progress=1
	;;
	-i\|--init)
	init=1
	;;
	--require-init)
	init=1
	require_init=1
	;;
	--remote)
	remote=1
	;;
	-N\|--no-fetch)
	nofetch=1
	;;
	-f\|--force)
	force=$1
	;;
	-r\|--rebase)
	update="rebase"
	;;
	--reference)
	case "$2" in '') usage ;; esac
	reference="--reference=$2"
	shift
	;;
	--reference=*)
	reference="$1"
	;;
	--dissociate)
	dissociate=1
	;;
	-m\|--merge)
	update="merge"
	;;
	--recursive)
	recursive=1
	;;
	--checkout)
	update="checkout"
	;;
	--recommend-shallow)
	recommend_shallow="--recommend-shallow"
	;;
	--no-recommend-shallow)
	recommend_shallow="--no-recommend-shallow"
	;;
	--depth)
	case "$2" in '') usage ;; esac
	depth="--depth=$2"
	shift
	;;
	--depth=*)
	depth=$1
	;;
	-j\|--jobs)
	case "$2" in '') usage ;; esac
	jobs="--jobs=$2"
	shift
	;;
	--jobs=*)
	jobs=$1
	;;
	--single-branch)
	single_branch="--single-branch"
	;;
	--no-single-branch)
	single_branch="--no-single-branch"
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	if test -n "$init"
	then
	cmd_init "--" "$@" \|\| return
	fi

	{
	git submodule--helper update-clone ${GIT_QUIET:+--quiet} \
	${progress:+"--progress"} \
	${wt_prefix:+--prefix "$wt_prefix"} \
	${prefix:+--recursive-prefix "$prefix"} \
	${update:+--update "$update"} \
	${reference:+"$reference"} \
	${dissociate:+"--dissociate"} \
	${depth:+--depth "$depth"} \
	${require_init:+--require-init} \
	$single_branch \
	$recommend_shallow \
	$jobs \
	-- \
	"$@" \|\| echo "#unmatched" $?
	} \| {
	err=
	while read -r quickabort sha1 just_cloned sm_path
	do
	die_if_unmatched "$quickabort" "$sha1"

	git submodule--helper ensure-core-worktree "$sm_path" \|\| exit 1

	update_module=$(git submodule--helper update-module-mode $just_cloned "$sm_path" $update)

	displaypath=$(git submodule--helper relative-path "$prefix$sm_path" "$wt_prefix")

	if test $just_cloned -eq 1
	then
	subsha1=
	else
	subsha1=$(sanitize_submodule_env; cd "$sm_path" &&
	git rev-parse --verify HEAD) \|\|
	die "$(eval_gettext "Unable to find current revision in submodule path '\$displaypath'")"
	fi

	if test -n "$remote"
	then
	branch=$(git submodule--helper remote-branch "$sm_path")
	if test -z "$nofetch"
	then
	# Fetch remote before determining tracking $sha1
	fetch_in_submodule "$sm_path" $depth \|\|
	die "$(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
	fi
	remote_name=$(sanitize_submodule_env; cd "$sm_path" && git submodule--helper print-default-remote)
	sha1=$(sanitize_submodule_env; cd "$sm_path" &&
	git rev-parse --verify "${remote_name}/${branch}") \|\|
	die "$(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
	fi

	if test "$subsha1" != "$sha1" \|\| test -n "$force"
	then
	subforce=$force
	# If we don't already have a -f flag and the submodule has never been checked out
	if test -z "$subsha1" && test -z "$force"
	then
	subforce="-f"
	fi

	if test -z "$nofetch"
	then
	# Run fetch only if $sha1 isn't present or it
	# is not reachable from a ref.
	is_tip_reachable "$sm_path" "$sha1" \|\|
	fetch_in_submodule "$sm_path" $depth \|\|
	say "$(eval_gettext "Unable to fetch in submodule path '\$displaypath'; trying to directly fetch \$sha1:")"

	# Now we tried the usual fetch, but $sha1 may
	# not be reachable from any of the refs
	is_tip_reachable "$sm_path" "$sha1" \|\|
	fetch_in_submodule "$sm_path" "$depth" "$sha1" \|\|
	die "$(eval_gettext "Fetched in submodule path '\$displaypath', but it did not contain \$sha1. Direct fetching of that commit failed.")"
	fi

	must_die_on_failure=
	case "$update_module" in
	checkout)
	command="git checkout $subforce -q"
	die_msg="$(eval_gettext "Unable to checkout '\$sha1' in submodule path '\$displaypath'")"
	say_msg="$(eval_gettext "Submodule path '\$displaypath': checked out '\$sha1'")"
	;;
	rebase)
	command="git rebase ${GIT_QUIET:+--quiet}"
	die_msg="$(eval_gettext "Unable to rebase '\$sha1' in submodule path '\$displaypath'")"
	say_msg="$(eval_gettext "Submodule path '\$displaypath': rebased into '\$sha1'")"
	must_die_on_failure=yes
	;;
	merge)
	command="git merge ${GIT_QUIET:+--quiet}"
	die_msg="$(eval_gettext "Unable to merge '\$sha1' in submodule path '\$displaypath'")"
	say_msg="$(eval_gettext "Submodule path '\$displaypath': merged in '\$sha1'")"
	must_die_on_failure=yes
	;;
	!*)
	command="${update_module#!}"
	die_msg="$(eval_gettext "Execution of '\$command \$sha1' failed in submodule path '\$displaypath'")"
	say_msg="$(eval_gettext "Submodule path '\$displaypath': '\$command \$sha1'")"
	must_die_on_failure=yes
	;;
	*)
	die "$(eval_gettext "Invalid update mode '$update_module' for submodule path '$path'")"
	esac

	if (sanitize_submodule_env; cd "$sm_path" && $command "$sha1")
	then
	say "$say_msg"
	elif test -n "$must_die_on_failure"
	then
	die_with_status 2 "$die_msg"
	else
	err="${err};$die_msg"
	continue
	fi
	fi

	if test -n "$recursive"
	then
	(
	prefix=$(git submodule--helper relative-path "$prefix$sm_path/" "$wt_prefix")
	wt_prefix=
	sanitize_submodule_env
	cd "$sm_path" &&
	eval cmd_update
	)
	res=$?
	if test $res -gt 0
	then
	die_msg="$(eval_gettext "Failed to recurse into submodule path '\$displaypath'")"
	if test $res -ne 2
	then
	err="${err};$die_msg"
	continue
	else
	die_with_status $res "$die_msg"
	fi
	fi
	fi
	done

	if test -n "$err"
	then
	OIFS=$IFS
	IFS=';'
	for e in $err
	do
	if test -n "$e"
	then
	echo >&2 "$e"
	fi
	done
	IFS=$OIFS
	exit 1
	fi
	}
	}

	#
	# Configures a submodule's default branch
	#
	# $@ = requested path
	#
	cmd_set_branch() {
	default=
	branch=

	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	# we don't do anything with this but we need to accept it
	;;
	-d\|--default)
	default=1
	;;
	-b\|--branch)
	case "$2" in '') usage ;; esac
	branch=$2
	shift
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper set-branch ${GIT_QUIET:+--quiet} ${branch:+--branch "$branch"} ${default:+--default} -- "$@"
	}

	#
	# Configures a submodule's remote url
	#
	# $@ = requested path, requested url
	#
	cmd_set_url() {
	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	GIT_QUIET=1
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper set-url ${GIT_QUIET:+--quiet} -- "$@"
	}

	#
	# Show commit summary for submodules in index or working tree
	#
	# If '--cached' is given, show summary between index and given commit,
	# or between working tree and given commit
	#
	# $@ = [commit (default 'HEAD'),] requested paths (default all)
	#
	cmd_summary() {
	summary_limit=-1
	for_status=
	diff_cmd=diff-index

	# parse $args after "submodule ... summary".
	while test $# -ne 0
	do
	case "$1" in
	--cached)
	cached="$1"
	;;
	--files)
	files="$1"
	;;
	--for-status)
	for_status="$1"
	;;
	-n\|--summary-limit)
	summary_limit="$2"
	isnumber "$summary_limit" \|\| usage
	shift
	;;
	--summary-limit=*)
	summary_limit="${1#--summary-limit=}"
	isnumber "$summary_limit" \|\| usage
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper summary ${prefix:+--prefix "$prefix"} ${files:+--files} ${cached:+--cached} ${for_status:+--for-status} ${summary_limit:+-n $summary_limit} -- "$@"
	}
	#
	# List all submodules, prefixed with:
	# - submodule not initialized
	# + different revision checked out
	#
	# If --cached was specified the revision in the index will be printed
	# instead of the currently checked out revision.
	#
	# $@ = requested paths (default to all)
	#
	cmd_status()
	{
	# parse $args after "submodule ... status".
	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	GIT_QUIET=1
	;;
	--cached)
	cached=1
	;;
	--recursive)
	recursive=1
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper status ${GIT_QUIET:+--quiet} ${cached:+--cached} ${recursive:+--recursive} -- "$@"
	}
	#
	# Sync remote urls for submodules
	# This makes the value for remote.$remote.url match the value
	# specified in .gitmodules.
	#
	cmd_sync()
	{
	while test $# -ne 0
	do
	case "$1" in
	-q\|--quiet)
	GIT_QUIET=1
	shift
	;;
	--recursive)
	recursive=1
	shift
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	done

	git ${wt_prefix:+-C "$wt_prefix"} ${prefix:+--super-prefix "$prefix"} submodule--helper sync ${GIT_QUIET:+--quiet} ${recursive:+--recursive} -- "$@"
	}

	cmd_absorbgitdirs()
	{
	git submodule--helper absorb-git-dirs --prefix "$wt_prefix" "$@"
	}

	# This loop parses the command line arguments to find the
	# subcommand name to dispatch. Parsing of the subcommand specific
	# options are primarily done by the subcommand implementations.
	# Subcommand specific options such as --branch and --cached are
	# parsed here as well, for backward compatibility.

	while test $# != 0 && test -z "$command"
	do
	case "$1" in
	add \| foreach \| init \| deinit \| update \| set-branch \| set-url \| status \| summary \| sync \| absorbgitdirs)
	command=$1
	;;
	-q\|--quiet)
	GIT_QUIET=1
	;;
	-b\|--branch)
	case "$2" in
	'')
	usage
	;;
	esac
	branch="$2"; shift
	;;
	--cached)
	cached="$1"
	;;
	--)
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	# No command word defaults to "status"
	if test -z "$command"
	then
	if test $# = 0
	then
	command=status
	else
	usage
	fi
	fi

	# "-b branch" is accepted only by "add" and "set-branch"
	if test -n "$branch" && (test "$command" != add \|\| test "$command" != set-branch)
	then
	usage
	fi

	# "--cached" is accepted only by "status" and "summary"
	if test -n "$cached" && test "$command" != status && test "$command" != summary
	then
	usage
	fi

	"cmd_$(echo $command \| sed -e s/-/_/g)" "$@"