git-fetch.sh - git - Git at Google

 #!/bin/sh
 #
 . git-sh-setup || die "Not a git archive"
 . git-parse-remote
 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"

 LF='
 '
 IFS="$LF"

 tags=
 append=
 force=
 update_head_ok=
 while case "$#" in 0) break ;; esac
 do
 	case "$1" in
 	-a|--a|--ap|--app|--appe|--appen|--append)
 		append=t
 		;;
 	-f|--f|--fo|--for|--forc|--force)
 		force=t
 		;;
 	-t|--t|--ta|--tag|--tags)
 		tags=t
 		;;
 	-u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
 	--update-he|--update-hea|--update-head|--update-head-|\
 	--update-head-o|--update-head-ok)
 		update_head_ok=t
 		;;
 	*)
 		break
 		;;
 	esac
 	shift
 done

 case "$#" in
 0)
 	test -f "$GIT_DIR/branches/origin" ||
 		test -f "$GIT_DIR/remotes/origin" ||
 			die "Where do you want to fetch from today?"
 	set origin ;;
 esac

 remote_nick="$1"
 remote=$(get_remote_url "$@")
 refs=
 rref=
 rsync_slurped_objects=

 if test "" = "$append"
 then
 	: >"$GIT_DIR/FETCH_HEAD"
 fi

 append_fetch_head () {
     head_="$1"
     remote_="$2"
     remote_name_="$3"
     remote_nick_="$4"
     local_name_="$5"
     case "$6" in
     t) not_for_merge_='not-for-merge' ;;
     '') not_for_merge_= ;;
     esac

     # remote-nick is the URL given on the command line (or a shorthand)
     # remote-name is the $GIT_DIR relative refs/ path we computed
     # for this refspec.
     case "$remote_name_" in
     HEAD)
 	note_= ;;
     refs/heads/*)
 	note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
 	note_="branch '$note_' of " ;;
     refs/tags/*)
 	note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
 	note_="tag '$note_' of " ;;
     *)
 	note_="$remote_name of " ;;
     esac
     remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
 	remote_="$remote_1_"
     note_="$note_$remote_"

     # 2.6.11-tree tag would not be happy to be fed to resolve.
     if git-cat-file commit "$head_" >/dev/null 2>&1
     then
 	headc_=$(git-rev-parse --verify "$head_^0") || exit
 	echo "$headc_	$not_for_merge_	$note_" >>"$GIT_DIR/FETCH_HEAD"
 	echo >&2 "* committish: $head_"
 	echo >&2 "  $note_"
     else
 	echo "$head_	not-for-merge	$note_" >>"$GIT_DIR/FETCH_HEAD"
 	echo >&2 "* non-commit: $head_"
 	echo >&2 "  $note_"
     fi
     if test "$local_name_" != ""
     then
 	# We are storing the head locally.  Make sure that it is
 	# a fast forward (aka "reverse push").
 	fast_forward_local "$local_name_" "$head_" "$note_"
     fi
 }

 fast_forward_local () {
     mkdir -p "$(dirname "$GIT_DIR/$1")"
     case "$1" in
     refs/tags/*)
 	# Tags need not be pointing at commits so there
 	# is no way to guarantee "fast-forward" anyway.
 	if test -f "$GIT_DIR/$1"
 	then
 		if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
 		then
 			echo >&2 "* $1: same as $3"
 		else
 			echo >&2 "* $1: updating with $3"
 		fi
 	else
 		echo >&2 "* $1: storing $3"
 	fi
 	git-update-ref "$1" "$2"
 	;;

     refs/heads/*)
 	# $1 is the ref being updated.
 	# $2 is the new value for the ref.
 	local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
 	if test "$local"
 	then
 	    # Require fast-forward.
 	    mb=$(git-merge-base "$local" "$2") &&
 	    case "$2,$mb" in
 	    $local,*)
 		echo >&2 "* $1: same as $3"
 		;;
 	    *,$local)
 		echo >&2 "* $1: fast forward to $3"
 		git-update-ref "$1" "$2" "$local"
 		;;
 	    *)
 		false
 		;;
 	    esac || {
 		echo >&2 "* $1: does not fast forward to $3;"
 		case ",$force,$single_force," in
 		*,t,*)
 			echo >&2 "  forcing update."
 			git-update-ref "$1" "$2" "$local"
 			;;
 		*)
 			echo >&2 "  not updating."
 			;;
 		esac
 	    }
 	else
 	    echo >&2 "* $1: storing $3"
 	    git-update-ref "$1" "$2"
 	fi
 	;;
     esac
 }

 case "$update_head_ok" in
 '')
 	orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 	;;
 esac

 # If --tags (and later --heads or --all) is specified, then we are
 # not talking about defaults stored in Pull: line of remotes or
 # branches file, and just fetch those and refspecs explicitly given.
 # Otherwise we do what we always did.

 reflist=$(get_remote_refs_for_fetch "$@")
 if test "$tags"
 then
 	taglist=$(git-ls-remote --tags "$remote" |
 		sed -e '
 			/\^/d
 			s/^[^	]*	//
 			s/.*/&:&/')
 	if test "$#" -gt 1
 	then
 		# remote URL plus explicit refspecs; we need to merge them.
 		reflist="$reflist$LF$taglist"
 	else
 		# No explicit refspecs; fetch tags only.
 		reflist=$taglist
 	fi
 fi

 for ref in $reflist
 do
     refs="$refs$LF$ref"

     # These are relative path from $GIT_DIR, typically starting at refs/
     # but may be HEAD
     if expr "$ref" : '\.' >/dev/null
     then
 	not_for_merge=t
 	ref=$(expr "$ref" : '\.\(.*\)')
     else
 	not_for_merge=
     fi
     if expr "$ref" : '\+' >/dev/null
     then
 	single_force=t
 	ref=$(expr "$ref" : '\+\(.*\)')
     else
 	single_force=
     fi
     remote_name=$(expr "$ref" : '\([^:]*\):')
     local_name=$(expr "$ref" : '[^:]*:\(.*\)')

     rref="$rref$LF$remote_name"

     # There are transports that can fetch only one head at a time...
     case "$remote" in
     http://* | https://*)
 	if [ -n "$GIT_SSL_NO_VERIFY" ]; then
 	    curl_extra_args="-k"
 	fi
 	remote_name_quoted=$(perl -e '
 	    my $u = $ARGV[0];
 	    $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
 	    print "$u";
 	' "$remote_name")
 	head=$(curl -nsf $curl_extra_args "$remote/$remote_name_quoted") &&
 	expr "$head" : "$_x40\$" >/dev/null ||
 		die "Failed to fetch $remote_name from $remote"
 	echo >&2 Fetching "$remote_name from $remote" using http
 	git-http-fetch -v -a "$head" "$remote/" || exit
 	;;
     rsync://*)
 	TMP_HEAD="$GIT_DIR/TMP_HEAD"
 	rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
 	head=$(git-rev-parse --verify TMP_HEAD)
 	rm -f "$TMP_HEAD"
 	test "$rsync_slurped_objects" || {
 	    rsync -av --ignore-existing --exclude info \
 		"$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit

 	    # Look at objects/info/alternates for rsync -- http will
 	    # support it natively and git native ones will do it on the remote
 	    # end.  Not having that file is not a crime.
 	    rsync -q "$remote/objects/info/alternates" \
 		"$GIT_DIR/TMP_ALT" 2>/dev/null ||
 		rm -f "$GIT_DIR/TMP_ALT"
 	    if test -f "$GIT_DIR/TMP_ALT"
 	    then
 		resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
 		while read alt
 		do
 		    case "$alt" in 'bad alternate: '*) die "$alt";; esac
 		    echo >&2 "Getting alternate: $alt"
 		    rsync -av --ignore-existing --exclude info \
 		    "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
 		done
 		rm -f "$GIT_DIR/TMP_ALT"
 	    fi
 	    rsync_slurped_objects=t
 	}
 	;;
     *)
 	# We will do git native transport with just one call later.
 	continue ;;
     esac

     append_fetch_head "$head" "$remote" \
     	"$remote_name" "$remote_nick" "$local_name" "$not_for_merge"

 done

 case "$remote" in
 http://* | https://* | rsync://* )
     ;; # we are already done.
 *)
     IFS=" 	$LF"
     (
 	git-fetch-pack "$remote" $rref || echo failed "$remote"
     ) |
     while read sha1 remote_name
     do
 	case "$sha1" in
 	failed)
 		echo >&2 "Fetch failure: $remote"
 		exit 1 ;;
 	esac
 	found=
 	single_force=
 	for ref in $refs
 	do
 	    case "$ref" in
 	    +$remote_name:*)
 		single_force=t
 		not_for_merge=
 		found="$ref"
 		break ;;
 	    .+$remote_name:*)
 		single_force=t
 		not_for_merge=t
 		found="$ref"
 		break ;;
 	    .$remote_name:*)
 	        not_for_merge=t
 		found="$ref"
 		break ;;
 	    $remote_name:*)
 	    	not_for_merge=
 		found="$ref"
 		break ;;
 	    esac
 	done
 	local_name=$(expr "$found" : '[^:]*:\(.*\)')
 	append_fetch_head "$sha1" "$remote" \
 		"$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
     done || exit
     ;;
 esac

 # If the original head was empty (i.e. no "master" yet), or
 # if we were told not to worry, we do not have to check.
 case ",$update_head_ok,$orig_head," in
 *,, | t,* )
 	;;
 *)
 	curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 	if test "$curr_head" != "$orig_head"
 	then
 	    	git-update-ref HEAD "$orig_head"
 		die "Cannot fetch into the current branch."
 	fi
 	;;
 esac
	#!/bin/sh
	#
	. git-sh-setup \|\| die "Not a git archive"
	. git-parse-remote
	_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
	_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"

	LF='
	'
	IFS="$LF"

	tags=
	append=
	force=
	update_head_ok=
	while case "$#" in 0) break ;; esac
	do
	case "$1" in
	-a\|--a\|--ap\|--app\|--appe\|--appen\|--append)
	append=t
	;;
	-f\|--f\|--fo\|--for\|--forc\|--force)
	force=t
	;;
	-t\|--t\|--ta\|--tag\|--tags)
	tags=t
	;;
	-u\|--u\|--up\|--upd\|--upda\|--updat\|--update\|--update-\|--update-h\|\
	--update-he\|--update-hea\|--update-head\|--update-head-\|\
	--update-head-o\|--update-head-ok)
	update_head_ok=t
	;;
	*)
	break
	;;
	esac
	shift
	done

	case "$#" in
	0)
	test -f "$GIT_DIR/branches/origin" \|\|
	test -f "$GIT_DIR/remotes/origin" \|\|
	die "Where do you want to fetch from today?"
	set origin ;;
	esac

	remote_nick="$1"
	remote=$(get_remote_url "$@")
	refs=
	rref=
	rsync_slurped_objects=

	if test "" = "$append"
	then
	: >"$GIT_DIR/FETCH_HEAD"
	fi

	append_fetch_head () {
	head_="$1"
	remote_="$2"
	remote_name_="$3"
	remote_nick_="$4"
	local_name_="$5"
	case "$6" in
	t) not_for_merge_='not-for-merge' ;;
	'') not_for_merge_= ;;
	esac

	# remote-nick is the URL given on the command line (or a shorthand)
	# remote-name is the $GIT_DIR relative refs/ path we computed
	# for this refspec.
	case "$remote_name_" in
	HEAD)
	note_= ;;
	refs/heads/*)
	note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
	note_="branch '$note_' of " ;;
	refs/tags/*)
	note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
	note_="tag '$note_' of " ;;
	*)
	note_="$remote_name of " ;;
	esac
	remote_1_=$(expr "$remote_" : '\(.\)\.git/$') &&
	remote_="$remote_1_"
	note_="$note_$remote_"

	# 2.6.11-tree tag would not be happy to be fed to resolve.
	if git-cat-file commit "$head_" >/dev/null 2>&1
	then
	headc_=$(git-rev-parse --verify "$head_^0") \|\| exit
	echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
	echo >&2 "* committish: $head_"
	echo >&2 " $note_"
	else
	echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
	echo >&2 "* non-commit: $head_"
	echo >&2 " $note_"
	fi
	if test "$local_name_" != ""
	then
	# We are storing the head locally. Make sure that it is
	# a fast forward (aka "reverse push").
	fast_forward_local "$local_name_" "$head_" "$note_"
	fi
	}

	fast_forward_local () {
	mkdir -p "$(dirname "$GIT_DIR/$1")"
	case "$1" in
	refs/tags/*)
	# Tags need not be pointing at commits so there
	# is no way to guarantee "fast-forward" anyway.
	if test -f "$GIT_DIR/$1"
	then
	if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
	then
	echo >&2 "* $1: same as $3"
	else
	echo >&2 "* $1: updating with $3"
	fi
	else
	echo >&2 "* $1: storing $3"
	fi
	git-update-ref "$1" "$2"
	;;

	refs/heads/*)
	# $1 is the ref being updated.
	# $2 is the new value for the ref.
	local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
	if test "$local"
	then
	# Require fast-forward.
	mb=$(git-merge-base "$local" "$2") &&
	case "$2,$mb" in
	$local,*)
	echo >&2 "* $1: same as $3"
	;;
	*,$local)
	echo >&2 "* $1: fast forward to $3"
	git-update-ref "$1" "$2" "$local"
	;;
	*)
	false
	;;
	esac \|\| {
	echo >&2 "* $1: does not fast forward to $3;"
	case ",$force,$single_force," in
	,t,)
	echo >&2 " forcing update."
	git-update-ref "$1" "$2" "$local"
	;;
	*)
	echo >&2 " not updating."
	;;
	esac
	}
	else
	echo >&2 "* $1: storing $3"
	git-update-ref "$1" "$2"
	fi
	;;
	esac
	}

	case "$update_head_ok" in
	'')
	orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
	;;
	esac

	# If --tags (and later --heads or --all) is specified, then we are
	# not talking about defaults stored in Pull: line of remotes or
	# branches file, and just fetch those and refspecs explicitly given.
	# Otherwise we do what we always did.

	reflist=$(get_remote_refs_for_fetch "$@")
	if test "$tags"
	then
	taglist=$(git-ls-remote --tags "$remote" \|
	sed -e '
	/\^/d
	s/^[^ ]* //
	s/.*/&:&/')
	if test "$#" -gt 1
	then
	# remote URL plus explicit refspecs; we need to merge them.
	reflist="$reflist$LF$taglist"
	else
	# No explicit refspecs; fetch tags only.
	reflist=$taglist
	fi
	fi

	for ref in $reflist
	do
	refs="$refs$LF$ref"

	# These are relative path from $GIT_DIR, typically starting at refs/
	# but may be HEAD
	if expr "$ref" : '\.' >/dev/null
	then
	not_for_merge=t
	ref=$(expr "$ref" : '\.\(.*\)')
	else
	not_for_merge=
	fi
	if expr "$ref" : '\+' >/dev/null
	then
	single_force=t
	ref=$(expr "$ref" : '\+\(.*\)')
	else
	single_force=
	fi
	remote_name=$(expr "$ref" : '\([^:]*\):')
	local_name=$(expr "$ref" : '[^:]:\(.\)')

	rref="$rref$LF$remote_name"

	# There are transports that can fetch only one head at a time...
	case "$remote" in
	http://* \| https://*)
	if [ -n "$GIT_SSL_NO_VERIFY" ]; then
	curl_extra_args="-k"
	fi
	remote_name_quoted=$(perl -e '
	my $u = $ARGV[0];
	$u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
	print "$u";
	' "$remote_name")
	head=$(curl -nsf $curl_extra_args "$remote/$remote_name_quoted") &&
	expr "$head" : "$_x40\$" >/dev/null \|\|
	die "Failed to fetch $remote_name from $remote"
	echo >&2 Fetching "$remote_name from $remote" using http
	git-http-fetch -v -a "$head" "$remote/" \|\| exit
	;;
	rsync://*)
	TMP_HEAD="$GIT_DIR/TMP_HEAD"
	rsync -L -q "$remote/$remote_name" "$TMP_HEAD" \|\| exit 1
	head=$(git-rev-parse --verify TMP_HEAD)
	rm -f "$TMP_HEAD"
	test "$rsync_slurped_objects" \|\| {
	rsync -av --ignore-existing --exclude info \
	"$remote/objects/" "$GIT_OBJECT_DIRECTORY/" \|\| exit

	# Look at objects/info/alternates for rsync -- http will
	# support it natively and git native ones will do it on the remote
	# end. Not having that file is not a crime.
	rsync -q "$remote/objects/info/alternates" \
	"$GIT_DIR/TMP_ALT" 2>/dev/null \|\|
	rm -f "$GIT_DIR/TMP_ALT"
	if test -f "$GIT_DIR/TMP_ALT"
	then
	resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" \|
	while read alt
	do
	case "$alt" in 'bad alternate: '*) die "$alt";; esac
	echo >&2 "Getting alternate: $alt"
	rsync -av --ignore-existing --exclude info \
	"$alt" "$GIT_OBJECT_DIRECTORY/" \|\| exit
	done
	rm -f "$GIT_DIR/TMP_ALT"
	fi
	rsync_slurped_objects=t
	}
	;;
	*)
	# We will do git native transport with just one call later.
	continue ;;
	esac

	append_fetch_head "$head" "$remote" \
	"$remote_name" "$remote_nick" "$local_name" "$not_for_merge"

	done

	case "$remote" in
	http://* \| https://* \| rsync://* )
	;; # we are already done.
	*)
	IFS=" $LF"
	(
	git-fetch-pack "$remote" $rref \|\| echo failed "$remote"
	) \|
	while read sha1 remote_name
	do
	case "$sha1" in
	failed)
	echo >&2 "Fetch failure: $remote"
	exit 1 ;;
	esac
	found=
	single_force=
	for ref in $refs
	do
	case "$ref" in
	+$remote_name:*)
	single_force=t
	not_for_merge=
	found="$ref"
	break ;;
	.+$remote_name:*)
	single_force=t
	not_for_merge=t
	found="$ref"
	break ;;
	.$remote_name:*)
	not_for_merge=t
	found="$ref"
	break ;;
	$remote_name:*)
	not_for_merge=
	found="$ref"
	break ;;
	esac
	done
	local_name=$(expr "$found" : '[^:]:\(.\)')
	append_fetch_head "$sha1" "$remote" \
	"$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
	done \|\| exit
	;;
	esac

	# If the original head was empty (i.e. no "master" yet), or
	# if we were told not to worry, we do not have to check.
	case ",$update_head_ok,$orig_head," in
	,, \| t, )
	;;
	*)
	curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
	if test "$curr_head" != "$orig_head"
	then
	git-update-ref HEAD "$orig_head"
	die "Cannot fetch into the current branch."
	fi
	;;
	esac