git-legacy-stash.sh 16 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
#!/bin/sh
# Copyright (c) 2007, Nanako Shiraishi

dashless=$(basename "$0" | sed -e 's/-/ /')
USAGE="list [<options>]
   or: $dashless show [<stash>]
   or: $dashless drop [-q|--quiet] [<stash>]
   or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
   or: $dashless branch <branchname> [<stash>]
   or: $dashless save [--patch] [-k|--[no-]keep-index] [-q|--quiet]
		      [-u|--include-untracked] [-a|--all] [<message>]
   or: $dashless [push [--patch] [-k|--[no-]keep-index] [-q|--quiet]
		       [-u|--include-untracked] [-a|--all] [-m <message>]
		       [-- <pathspec>...]]
   or: $dashless clear"

SUBDIRECTORY_OK=Yes
OPTIONS_SPEC=
START_DIR=$(pwd)
. git-sh-setup
require_work_tree
prefix=$(git rev-parse --show-prefix) || exit 1
cd_to_toplevel

TMP="$GIT_DIR/.git-stash.$$"
TMPindex=${GIT_INDEX_FILE-"$(git rev-parse --git-path index)"}.stash.$$
trap 'rm -f "$TMP-"* "$TMPindex"' 0

ref_stash=refs/stash

if git config --get-colorbool color.interactive; then
       help_color="$(git config --get-color color.interactive.help 'red bold')"
       reset_color="$(git config --get-color '' reset)"
else
       help_color=
       reset_color=
fi

no_changes () {
	git diff-index --quiet --cached HEAD --ignore-submodules -- "$@" &&
	git diff-files --quiet --ignore-submodules -- "$@" &&
	(test -z "$untracked" || test -z "$(untracked_files "$@")")
}

untracked_files () {
	if test "$1" = "-z"
	then
		shift
		z=-z
	else
		z=
	fi
	excl_opt=--exclude-standard
	test "$untracked" = "all" && excl_opt=
	git ls-files -o $z $excl_opt -- "$@"
}

prepare_fallback_ident () {
	if ! git -c user.useconfigonly=yes var GIT_COMMITTER_IDENT >/dev/null 2>&1
	then
		GIT_AUTHOR_NAME="git stash"
		GIT_AUTHOR_EMAIL=git@stash
		GIT_COMMITTER_NAME="git stash"
		GIT_COMMITTER_EMAIL=git@stash
		export GIT_AUTHOR_NAME
		export GIT_AUTHOR_EMAIL
		export GIT_COMMITTER_NAME
		export GIT_COMMITTER_EMAIL
	fi
}

clear_stash () {
	if test $# != 0
	then
		die "$(gettext "git stash clear with parameters is unimplemented")"
	fi
	if current=$(git rev-parse --verify --quiet $ref_stash)
	then
		git update-ref -d $ref_stash $current
	fi
}

83 84 85 86 87 88
maybe_quiet () {
	case "$1" in
	--keep-stdout)
		shift
		if test -n "$GIT_QUIET"
		then
89
			"$@" 2>/dev/null
90
		else
91
			"$@"
92 93 94 95 96
		fi
		;;
	*)
		if test -n "$GIT_QUIET"
		then
97
			"$@" >/dev/null 2>&1
98
		else
99
			"$@"
100 101 102 103 104
		fi
		;;
	esac
}

105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
create_stash () {

	prepare_fallback_ident

	stash_msg=
	untracked=
	while test $# != 0
	do
		case "$1" in
		-m|--message)
			shift
			stash_msg=${1?"BUG: create_stash () -m requires an argument"}
			;;
		-m*)
			stash_msg=${1#-m}
			;;
		--message=*)
			stash_msg=${1#--message=}
			;;
		-u|--include-untracked)
			shift
			untracked=${1?"BUG: create_stash () -u requires an argument"}
			;;
		--)
			shift
			break
			;;
		esac
		shift
	done

	git update-index -q --refresh
137
	if maybe_quiet no_changes "$@"
138 139 140 141 142
	then
		exit 0
	fi

	# state of the base commit
143
	if b_commit=$(maybe_quiet --keep-stdout git rev-parse --verify HEAD)
144 145
	then
		head=$(git rev-list --oneline -n 1 HEAD --)
146 147 148
	elif test -n "$GIT_QUIET"
	then
		exit 1
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
	else
		die "$(gettext "You do not have the initial commit yet")"
	fi

	if branch=$(git symbolic-ref -q HEAD)
	then
		branch=${branch#refs/heads/}
	else
		branch='(no branch)'
	fi
	msg=$(printf '%s: %s' "$branch" "$head")

	# state of the index
	i_tree=$(git write-tree) &&
	i_commit=$(printf 'index on %s\n' "$msg" |
		git commit-tree $i_tree -p $b_commit) ||
		die "$(gettext "Cannot save the current index state")"

	if test -n "$untracked"
	then
		# Untracked files are stored by themselves in a parentless commit, for
		# ease of unpacking later.
		u_commit=$(
			untracked_files -z "$@" | (
				GIT_INDEX_FILE="$TMPindex" &&
				export GIT_INDEX_FILE &&
				rm -f "$TMPindex" &&
				git update-index -z --add --remove --stdin &&
				u_tree=$(git write-tree) &&
				printf 'untracked files on %s\n' "$msg" | git commit-tree $u_tree  &&
				rm -f "$TMPindex"
		) ) || die "$(gettext "Cannot save the untracked files")"

		untracked_commit_option="-p $u_commit";
	else
		untracked_commit_option=
	fi

	if test -z "$patch_mode"
	then

		# state of the working tree
		w_tree=$( (
			git read-tree --index-output="$TMPindex" -m $i_tree &&
			GIT_INDEX_FILE="$TMPindex" &&
			export GIT_INDEX_FILE &&
			git diff-index --name-only -z HEAD -- "$@" >"$TMP-stagenames" &&
			git update-index -z --add --remove --stdin <"$TMP-stagenames" &&
			git write-tree &&
			rm -f "$TMPindex"
		) ) ||
			die "$(gettext "Cannot save the current worktree state")"

	else

		rm -f "$TMP-index" &&
		GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&

		# find out what the user wants
		GIT_INDEX_FILE="$TMP-index" \
			git add--interactive --patch=stash -- "$@" &&

		# state of the working tree
		w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
		die "$(gettext "Cannot save the current worktree state")"

		git diff-tree -p HEAD $w_tree -- >"$TMP-patch" &&
		test -s "$TMP-patch" ||
		die "$(gettext "No changes selected")"

		rm -f "$TMP-index" ||
		die "$(gettext "Cannot remove temporary index (can't happen)")"

	fi

	# create the stash
	if test -z "$stash_msg"
	then
		stash_msg=$(printf 'WIP on %s' "$msg")
	else
		stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
	fi
	w_commit=$(printf '%s\n' "$stash_msg" |
	git commit-tree $w_tree -p $b_commit -p $i_commit $untracked_commit_option) ||
	die "$(gettext "Cannot record working tree state")"
}

store_stash () {
	while test $# != 0
	do
		case "$1" in
		-m|--message)
			shift
			stash_msg="$1"
			;;
		-m*)
			stash_msg=${1#-m}
			;;
		--message=*)
			stash_msg=${1#--message=}
			;;
		-q|--quiet)
			quiet=t
			;;
		*)
			break
			;;
		esac
		shift
	done
	test $# = 1 ||
	die "$(eval_gettext "\"$dashless store\" requires one <commit> argument")"

	w_commit="$1"
	if test -z "$stash_msg"
	then
		stash_msg="Created via \"git stash store\"."
	fi

	git update-ref --create-reflog -m "$stash_msg" $ref_stash $w_commit
	ret=$?
	test $ret != 0 && test -z "$quiet" &&
	die "$(eval_gettext "Cannot update \$ref_stash with \$w_commit")"
	return $ret
}

push_stash () {
	keep_index=
	patch_mode=
	untracked=
	stash_msg=
	while test $# != 0
	do
		case "$1" in
		-k|--keep-index)
			keep_index=t
			;;
		--no-keep-index)
			keep_index=n
			;;
		-p|--patch)
			patch_mode=t
			# only default to keep if we don't already have an override
			test -z "$keep_index" && keep_index=t
			;;
		-q|--quiet)
			GIT_QUIET=t
			;;
		-u|--include-untracked)
			untracked=untracked
			;;
		-a|--all)
			untracked=all
			;;
		-m|--message)
			shift
			test -z ${1+x} && usage
			stash_msg=$1
			;;
		-m*)
			stash_msg=${1#-m}
			;;
		--message=*)
			stash_msg=${1#--message=}
			;;
		--help)
			show_help
			;;
		--)
			shift
			break
			;;
		-*)
			option="$1"
			eval_gettextln "error: unknown option for 'stash push': \$option"
			usage
			;;
		*)
			break
			;;
		esac
		shift
	done

	eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"

	if test -n "$patch_mode" && test -n "$untracked"
	then
		die "$(gettext "Can't use --patch and --include-untracked or --all at the same time")"
	fi

	test -n "$untracked" || git ls-files --error-unmatch -- "$@" >/dev/null || exit 1

	git update-index -q --refresh
343
	if maybe_quiet no_changes "$@"
344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397
	then
		say "$(gettext "No local changes to save")"
		exit 0
	fi

	git reflog exists $ref_stash ||
		clear_stash || die "$(gettext "Cannot initialize stash")"

	create_stash -m "$stash_msg" -u "$untracked" -- "$@"
	store_stash -m "$stash_msg" -q $w_commit ||
	die "$(gettext "Cannot save the current status")"
	say "$(eval_gettext "Saved working directory and index state \$stash_msg")"

	if test -z "$patch_mode"
	then
		test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
		if test -n "$untracked" && test $# = 0
		then
			git clean --force --quiet -d $CLEAN_X_OPTION
		fi

		if test $# != 0
		then
			test -z "$untracked" && UPDATE_OPTION="-u" || UPDATE_OPTION=
			test "$untracked" = "all" && FORCE_OPTION="--force" || FORCE_OPTION=
			git add $UPDATE_OPTION $FORCE_OPTION -- "$@"
			git diff-index -p --cached --binary HEAD -- "$@" |
			git apply --index -R
		else
			git reset --hard -q
		fi

		if test "$keep_index" = "t" && test -n "$i_tree"
		then
			git read-tree --reset $i_tree
			git ls-files -z --modified -- "$@" |
			git checkout-index -z --force --stdin
		fi
	else
		git apply -R < "$TMP-patch" ||
		die "$(gettext "Cannot remove worktree changes")"

		if test "$keep_index" != "t"
		then
			git reset -q -- "$@"
		fi
	fi
}

save_stash () {
	push_options=
	while test $# != 0
	do
		case "$1" in
398 399 400
		-q|--quiet)
			GIT_QUIET=t
			;;
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797
		--)
			shift
			break
			;;
		-*)
			# pass all options through to push_stash
			push_options="$push_options $1"
			;;
		*)
			break
			;;
		esac
		shift
	done

	stash_msg="$*"

	if test -z "$stash_msg"
	then
		push_stash $push_options
	else
		push_stash $push_options -m "$stash_msg"
	fi
}

have_stash () {
	git rev-parse --verify --quiet $ref_stash >/dev/null
}

list_stash () {
	have_stash || return 0
	git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
}

show_stash () {
	ALLOW_UNKNOWN_FLAGS=t
	assert_stash_like "$@"

	if test -z "$FLAGS"
	then
		if test "$(git config --bool stash.showStat || echo true)" = "true"
		then
			FLAGS=--stat
		fi

		if test "$(git config --bool stash.showPatch || echo false)" = "true"
		then
			FLAGS=${FLAGS}${FLAGS:+ }-p
		fi

		if test -z "$FLAGS"
		then
			return 0
		fi
	fi

	git diff ${FLAGS} $b_commit $w_commit
}

show_help () {
	exec git help stash
	exit 1
}

#
# Parses the remaining options looking for flags and
# at most one revision defaulting to ${ref_stash}@{0}
# if none found.
#
# Derives related tree and commit objects from the
# revision, if one is found.
#
# stash records the work tree, and is a merge between the
# base commit (first parent) and the index tree (second parent).
#
#   REV is set to the symbolic version of the specified stash-like commit
#   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
#   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
#   s is set to the SHA1 of the stash commit
#   w_commit is set to the commit containing the working tree
#   b_commit is set to the base commit
#   i_commit is set to the commit containing the index tree
#   u_commit is set to the commit containing the untracked files tree
#   w_tree is set to the working tree
#   b_tree is set to the base tree
#   i_tree is set to the index tree
#   u_tree is set to the untracked files tree
#
#   GIT_QUIET is set to t if -q is specified
#   INDEX_OPTION is set to --index if --index is specified.
#   FLAGS is set to the remaining flags (if allowed)
#
# dies if:
#   * too many revisions specified
#   * no revision is specified and there is no stash stack
#   * a revision is specified which cannot be resolve to a SHA1
#   * a non-existent stash reference is specified
#   * unknown flags were set and ALLOW_UNKNOWN_FLAGS is not "t"
#

parse_flags_and_rev()
{
	test "$PARSE_CACHE" = "$*" && return 0 # optimisation
	PARSE_CACHE="$*"

	IS_STASH_LIKE=
	IS_STASH_REF=
	INDEX_OPTION=
	s=
	w_commit=
	b_commit=
	i_commit=
	u_commit=
	w_tree=
	b_tree=
	i_tree=
	u_tree=

	FLAGS=
	REV=
	for opt
	do
		case "$opt" in
			-q|--quiet)
				GIT_QUIET=-t
			;;
			--index)
				INDEX_OPTION=--index
			;;
			--help)
				show_help
			;;
			-*)
				test "$ALLOW_UNKNOWN_FLAGS" = t ||
					die "$(eval_gettext "unknown option: \$opt")"
				FLAGS="${FLAGS}${FLAGS:+ }$opt"
			;;
			*)
				REV="${REV}${REV:+ }'$opt'"
			;;
		esac
	done

	eval set -- $REV

	case $# in
		0)
			have_stash || die "$(gettext "No stash entries found.")"
			set -- ${ref_stash}@{0}
		;;
		1)
			:
		;;
		*)
			die "$(eval_gettext "Too many revisions specified: \$REV")"
		;;
	esac

	case "$1" in
		*[!0-9]*)
			:
		;;
		*)
			set -- "${ref_stash}@{$1}"
		;;
	esac

	REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
		reference="$1"
		die "$(eval_gettext "\$reference is not a valid reference")"
	}

	i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
	set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
	s=$1 &&
	w_commit=$1 &&
	b_commit=$2 &&
	w_tree=$3 &&
	b_tree=$4 &&
	i_tree=$5 &&
	IS_STASH_LIKE=t &&
	test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
	IS_STASH_REF=t

	u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
	u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
}

is_stash_like()
{
	parse_flags_and_rev "$@"
	test -n "$IS_STASH_LIKE"
}

assert_stash_like() {
	is_stash_like "$@" || {
		args="$*"
		die "$(eval_gettext "'\$args' is not a stash-like commit")"
	}
}

is_stash_ref() {
	is_stash_like "$@" && test -n "$IS_STASH_REF"
}

assert_stash_ref() {
	is_stash_ref "$@" || {
		args="$*"
		die "$(eval_gettext "'\$args' is not a stash reference")"
	}
}

apply_stash () {

	assert_stash_like "$@"

	git update-index -q --refresh || die "$(gettext "unable to refresh index")"

	# current index state
	c_tree=$(git write-tree) ||
		die "$(gettext "Cannot apply a stash in the middle of a merge")"

	unstashed_index_tree=
	if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
			test "$c_tree" != "$i_tree"
	then
		git diff-tree --binary $s^2^..$s^2 | git apply --cached
		test $? -ne 0 &&
			die "$(gettext "Conflicts in index. Try without --index.")"
		unstashed_index_tree=$(git write-tree) ||
			die "$(gettext "Could not save index tree")"
		git reset
	fi

	if test -n "$u_tree"
	then
		GIT_INDEX_FILE="$TMPindex" git read-tree "$u_tree" &&
		GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
		rm -f "$TMPindex" ||
		die "$(gettext "Could not restore untracked files from stash entry")"
	fi

	eval "
		GITHEAD_$w_tree='Stashed changes' &&
		GITHEAD_$c_tree='Updated upstream' &&
		GITHEAD_$b_tree='Version stash was based on' &&
		export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
	"

	if test -n "$GIT_QUIET"
	then
		GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
	fi
	if git merge-recursive $b_tree -- $c_tree $w_tree
	then
		# No conflict
		if test -n "$unstashed_index_tree"
		then
			git read-tree "$unstashed_index_tree"
		else
			a="$TMP-added" &&
			git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
			git read-tree --reset $c_tree &&
			git update-index --add --stdin <"$a" ||
				die "$(gettext "Cannot unstage modified files")"
			rm -f "$a"
		fi
		squelch=
		if test -n "$GIT_QUIET"
		then
			squelch='>/dev/null 2>&1'
		fi
		(cd "$START_DIR" && eval "git status $squelch") || :
	else
		# Merge conflict; keep the exit status from merge-recursive
		status=$?
		git rerere
		if test -n "$INDEX_OPTION"
		then
			gettextln "Index was not unstashed." >&2
		fi
		exit $status
	fi
}

pop_stash() {
	assert_stash_ref "$@"

	if apply_stash "$@"
	then
		drop_stash "$@"
	else
		status=$?
		say "$(gettext "The stash entry is kept in case you need it again.")"
		exit $status
	fi
}

drop_stash () {
	assert_stash_ref "$@"

	git reflog delete --updateref --rewrite "${REV}" &&
		say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
		die "$(eval_gettext "\${REV}: Could not drop stash entry")"

	# clear_stash if we just dropped the last stash entry
	git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
	clear_stash
}

apply_to_branch () {
	test -n "$1" || die "$(gettext "No branch name specified")"
	branch=$1
	shift 1

	set -- --index "$@"
	assert_stash_like "$@"

	git checkout -b $branch $REV^ &&
	apply_stash "$@" && {
		test -z "$IS_STASH_REF" || drop_stash "$@"
	}
}

test "$1" = "-p" && set "push" "$@"

PARSE_CACHE='--not-parsed'
# The default command is "push" if nothing but options are given
seen_non_option=
for opt
do
	case "$opt" in
	--) break ;;
	-*) ;;
	*) seen_non_option=t; break ;;
	esac
done

test -n "$seen_non_option" || set "push" "$@"

# Main command set
case "$1" in
list)
	shift
	list_stash "$@"
	;;
show)
	shift
	show_stash "$@"
	;;
save)
	shift
	save_stash "$@"
	;;
push)
	shift
	push_stash "$@"
	;;
apply)
	shift
	apply_stash "$@"
	;;
clear)
	shift
	clear_stash "$@"
	;;
create)
	shift
	create_stash -m "$*" && echo "$w_commit"
	;;
store)
	shift
	store_stash "$@"
	;;
drop)
	shift
	drop_stash "$@"
	;;
pop)
	shift
	pop_stash "$@"
	;;
branch)
	shift
	apply_to_branch "$@"
	;;
*)
	case $# in
	0)
		push_stash &&
		say "$(gettext "(To restore them type \"git stash apply\")")"
		;;
	*)
		usage
	esac
	;;
esac