git-stash.sh

   1 #!/bin/sh
   2 # Copyright (c) 2007, Nanako Shiraishi
   3
   4 dashless=$(basename "$0" | sed -e 's/-/ /')
   5 USAGE="list [<options>]
   6    or: $dashless show [<stash>]
   7    or: $dashless drop [-q|--quiet] [<stash>]
   8    or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
   9    or: $dashless branch <branchname> [<stash>]
  10    or: $dashless save [--patch] [-k|--[no-]keep-index] [-q|--quiet]
  11                       [-u|--include-untracked] [-a|--all] [<message>]
  12    or: $dashless [push [--patch] [-k|--[no-]keep-index] [-q|--quiet]
  13                        [-u|--include-untracked] [-a|--all] [-m <message>]
  14                        [-- <pathspec>...]]
  15    or: $dashless clear"
  16
  17 SUBDIRECTORY_OK=Yes
  18 OPTIONS_SPEC=
  19 START_DIR=$(pwd)
  20 . git-sh-setup
  21 require_work_tree
  22 prefix=$(git rev-parse --show-prefix) || exit 1
  23 cd_to_toplevel
  24
  25 TMP="$GIT_DIR/.git-stash.$$"
  26 TMPindex=${GIT_INDEX_FILE-"$(git rev-parse --git-path index)"}.stash.$$
  27 trap 'rm -f "$TMP-"* "$TMPindex"' 0
  28
  29 ref_stash=refs/stash
  30
  31 if git config --get-colorbool color.interactive; then
  32        help_color="$(git config --get-color color.interactive.help 'red bold')"
  33        reset_color="$(git config --get-color '' reset)"
  34 else
  35        help_color=
  36        reset_color=
  37 fi
  38
  39 no_changes () {
  40         git diff-index --quiet --cached HEAD --ignore-submodules -- "$@" &&
  41         git diff-files --quiet --ignore-submodules -- "$@" &&
  42         (test -z "$untracked" || test -z "$(untracked_files)")
  43 }
  44
  45 untracked_files () {
  46         if test "$1" = "-z"
  47         then
  48                 shift
  49                 z=-z
  50         else
  51                 z=
  52         fi
  53         excl_opt=--exclude-standard
  54         test "$untracked" = "all" && excl_opt=
  55         git ls-files -o $z $excl_opt -- "$@"
  56 }
  57
  58 clear_stash () {
  59         if test $# != 0
  60         then
  61                 die "$(gettext "git stash clear with parameters is unimplemented")"
  62         fi
  63         if current=$(git rev-parse --verify --quiet $ref_stash)
  64         then
  65                 git update-ref -d $ref_stash $current
  66         fi
  67 }
  68
  69 create_stash () {
  70         stash_msg=
  71         untracked=
  72         while test $# != 0
  73         do
  74                 case "$1" in
  75                 -m|--message)
  76                         shift
  77                         stash_msg=${1?"BUG: create_stash () -m requires an argument"}
  78                         ;;
  79                 -u|--include-untracked)
  80                         shift
  81                         untracked=${1?"BUG: create_stash () -u requires an argument"}
  82                         ;;
  83                 --)
  84                         shift
  85                         break
  86                         ;;
  87                 esac
  88                 shift
  89         done
  90
  91         git update-index -q --refresh
  92         if no_changes "$@"
  93         then
  94                 exit 0
  95         fi
  96
  97         # state of the base commit
  98         if b_commit=$(git rev-parse --verify HEAD)
  99         then
 100                 head=$(git rev-list --oneline -n 1 HEAD --)
 101         else
 102                 die "$(gettext "You do not have the initial commit yet")"
 103         fi
 104
 105         if branch=$(git symbolic-ref -q HEAD)
 106         then
 107                 branch=${branch#refs/heads/}
 108         else
 109                 branch='(no branch)'
 110         fi
 111         msg=$(printf '%s: %s' "$branch" "$head")
 112
 113         # state of the index
 114         i_tree=$(git write-tree) &&
 115         i_commit=$(printf 'index on %s\n' "$msg" |
 116                 git commit-tree $i_tree -p $b_commit) ||
 117                 die "$(gettext "Cannot save the current index state")"
 118
 119         if test -n "$untracked"
 120         then
 121                 # Untracked files are stored by themselves in a parentless commit, for
 122                 # ease of unpacking later.
 123                 u_commit=$(
 124                         untracked_files -z "$@" | (
 125                                 GIT_INDEX_FILE="$TMPindex" &&
 126                                 export GIT_INDEX_FILE &&
 127                                 rm -f "$TMPindex" &&
 128                                 git update-index -z --add --remove --stdin &&
 129                                 u_tree=$(git write-tree) &&
 130                                 printf 'untracked files on %s\n' "$msg" | git commit-tree $u_tree  &&
 131                                 rm -f "$TMPindex"
 132                 ) ) || die "$(gettext "Cannot save the untracked files")"
 133
 134                 untracked_commit_option="-p $u_commit";
 135         else
 136                 untracked_commit_option=
 137         fi
 138
 139         if test -z "$patch_mode"
 140         then
 141
 142                 # state of the working tree
 143                 w_tree=$( (
 144                         git read-tree --index-output="$TMPindex" -m $i_tree &&
 145                         GIT_INDEX_FILE="$TMPindex" &&
 146                         export GIT_INDEX_FILE &&
 147                         git diff-index --name-only -z HEAD -- "$@" >"$TMP-stagenames" &&
 148                         git update-index -z --add --remove --stdin <"$TMP-stagenames" &&
 149                         git write-tree &&
 150                         rm -f "$TMPindex"
 151                 ) ) ||
 152                         die "$(gettext "Cannot save the current worktree state")"
 153
 154         else
 155
 156                 rm -f "$TMP-index" &&
 157                 GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
 158
 159                 # find out what the user wants
 160                 GIT_INDEX_FILE="$TMP-index" \
 161                         git add--interactive --patch=stash -- "$@" &&
 162
 163                 # state of the working tree
 164                 w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
 165                 die "$(gettext "Cannot save the current worktree state")"
 166
 167                 git diff-tree -p HEAD $w_tree -- >"$TMP-patch" &&
 168                 test -s "$TMP-patch" ||
 169                 die "$(gettext "No changes selected")"
 170
 171                 rm -f "$TMP-index" ||
 172                 die "$(gettext "Cannot remove temporary index (can't happen)")"
 173
 174         fi
 175
 176         # create the stash
 177         if test -z "$stash_msg"
 178         then
 179                 stash_msg=$(printf 'WIP on %s' "$msg")
 180         else
 181                 stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
 182         fi
 183         w_commit=$(printf '%s\n' "$stash_msg" |
 184         git commit-tree $w_tree -p $b_commit -p $i_commit $untracked_commit_option) ||
 185         die "$(gettext "Cannot record working tree state")"
 186 }
 187
 188 store_stash () {
 189         while test $# != 0
 190         do
 191                 case "$1" in
 192                 -m|--message)
 193                         shift
 194                         stash_msg="$1"
 195                         ;;
 196                 -q|--quiet)
 197                         quiet=t
 198                         ;;
 199                 *)
 200                         break
 201                         ;;
 202                 esac
 203                 shift
 204         done
 205         test $# = 1 ||
 206         die "$(eval_gettext "\"$dashless store\" requires one <commit> argument")"
 207
 208         w_commit="$1"
 209         if test -z "$stash_msg"
 210         then
 211                 stash_msg="Created via \"git stash store\"."
 212         fi
 213
 214         git update-ref --create-reflog -m "$stash_msg" $ref_stash $w_commit
 215         ret=$?
 216         test $ret != 0 && test -z "$quiet" &&
 217         die "$(eval_gettext "Cannot update \$ref_stash with \$w_commit")"
 218         return $ret
 219 }
 220
 221 push_stash () {
 222         keep_index=
 223         patch_mode=
 224         untracked=
 225         stash_msg=
 226         while test $# != 0
 227         do
 228                 case "$1" in
 229                 -k|--keep-index)
 230                         keep_index=t
 231                         ;;
 232                 --no-keep-index)
 233                         keep_index=n
 234                         ;;
 235                 -p|--patch)
 236                         patch_mode=t
 237                         # only default to keep if we don't already have an override
 238                         test -z "$keep_index" && keep_index=t
 239                         ;;
 240                 -q|--quiet)
 241                         GIT_QUIET=t
 242                         ;;
 243                 -u|--include-untracked)
 244                         untracked=untracked
 245                         ;;
 246                 -a|--all)
 247                         untracked=all
 248                         ;;
 249                 -m|--message)
 250                         shift
 251                         test -z ${1+x} && usage
 252                         stash_msg=$1
 253                         ;;
 254                 --help)
 255                         show_help
 256                         ;;
 257                 --)
 258                         shift
 259                         break
 260                         ;;
 261                 -*)
 262                         option="$1"
 263                         # TRANSLATORS: $option is an invalid option, like
 264                         # `--blah-blah'. The 7 spaces at the beginning of the
 265                         # second line correspond to "error: ". So you should line
 266                         # up the second line with however many characters the
 267                         # translation of "error: " takes in your language. E.g. in
 268                         # English this is:
 269                         #
 270                         #    $ git stash save --blah-blah 2>&1 | head -n 2
 271                         #    error: unknown option for 'stash save': --blah-blah
 272                         #           To provide a message, use git stash save -- '--blah-blah'
 273                         eval_gettextln "error: unknown option for 'stash save': \$option
 274        To provide a message, use git stash save -- '\$option'"
 275                         usage
 276                         ;;
 277                 *)
 278                         break
 279                         ;;
 280                 esac
 281                 shift
 282         done
 283
 284         eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
 285
 286         if test -n "$patch_mode" && test -n "$untracked"
 287         then
 288                 die "$(gettext "Can't use --patch and --include-untracked or --all at the same time")"
 289         fi
 290
 291         test -n "$untracked" || git ls-files --error-unmatch -- "$@" >/dev/null || exit 1
 292
 293         git update-index -q --refresh
 294         if no_changes "$@"
 295         then
 296                 say "$(gettext "No local changes to save")"
 297                 exit 0
 298         fi
 299
 300         git reflog exists $ref_stash ||
 301                 clear_stash || die "$(gettext "Cannot initialize stash")"
 302
 303         create_stash -m "$stash_msg" -u "$untracked" -- "$@"
 304         store_stash -m "$stash_msg" -q $w_commit ||
 305         die "$(gettext "Cannot save the current status")"
 306         say "$(eval_gettext "Saved working directory and index state \$stash_msg")"
 307
 308         if test -z "$patch_mode"
 309         then
 310                 test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
 311                 if test -n "$untracked"
 312                 then
 313                         git clean --force --quiet -d $CLEAN_X_OPTION -- "$@"
 314                 fi
 315
 316                 if test $# != 0
 317                 then
 318                         git reset -q -- "$@"
 319                         git ls-files -z --modified -- "$@" |
 320                         git checkout-index -z --force --stdin
 321                         git clean --force -q -d -- "$@"
 322                 else
 323                         git reset --hard -q
 324                 fi
 325
 326                 if test "$keep_index" = "t" && test -n "$i_tree"
 327                 then
 328                         git read-tree --reset $i_tree
 329                         git ls-files -z --modified -- "$@" |
 330                         git checkout-index -z --force --stdin
 331                 fi
 332         else
 333                 git apply -R < "$TMP-patch" ||
 334                 die "$(gettext "Cannot remove worktree changes")"
 335
 336                 if test "$keep_index" != "t"
 337                 then
 338                         git reset -q -- "$@"
 339                 fi
 340         fi
 341 }
 342
 343 save_stash () {
 344         push_options=
 345         while test $# != 0
 346         do
 347                 case "$1" in
 348                 --)
 349                         shift
 350                         break
 351                         ;;
 352                 -*)
 353                         # pass all options through to push_stash
 354                         push_options="$push_options $1"
 355                         ;;
 356                 *)
 357                         break
 358                         ;;
 359                 esac
 360                 shift
 361         done
 362
 363         stash_msg="$*"
 364
 365         if test -z "$stash_msg"
 366         then
 367                 push_stash $push_options
 368         else
 369                 push_stash $push_options -m "$stash_msg"
 370         fi
 371 }
 372
 373 have_stash () {
 374         git rev-parse --verify --quiet $ref_stash >/dev/null
 375 }
 376
 377 list_stash () {
 378         have_stash || return 0
 379         git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
 380 }
 381
 382 show_stash () {
 383         ALLOW_UNKNOWN_FLAGS=t
 384         assert_stash_like "$@"
 385
 386         if test -z "$FLAGS"
 387         then
 388                 if test "$(git config --bool stash.showStat || echo true)" = "true"
 389                 then
 390                         FLAGS=--stat
 391                 fi
 392
 393                 if test "$(git config --bool stash.showPatch || echo false)" = "true"
 394                 then
 395                         FLAGS=${FLAGS}${FLAGS:+ }-p
 396                 fi
 397
 398                 if test -z "$FLAGS"
 399                 then
 400                         return 0
 401                 fi
 402         fi
 403
 404         git diff ${FLAGS} $b_commit $w_commit
 405 }
 406
 407 show_help () {
 408         exec git help stash
 409         exit 1
 410 }
 411
 412 #
 413 # Parses the remaining options looking for flags and
 414 # at most one revision defaulting to ${ref_stash}@{0}
 415 # if none found.
 416 #
 417 # Derives related tree and commit objects from the
 418 # revision, if one is found.
 419 #
 420 # stash records the work tree, and is a merge between the
 421 # base commit (first parent) and the index tree (second parent).
 422 #
 423 #   REV is set to the symbolic version of the specified stash-like commit
 424 #   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
 425 #   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
 426 #   s is set to the SHA1 of the stash commit
 427 #   w_commit is set to the commit containing the working tree
 428 #   b_commit is set to the base commit
 429 #   i_commit is set to the commit containing the index tree
 430 #   u_commit is set to the commit containing the untracked files tree
 431 #   w_tree is set to the working tree
 432 #   b_tree is set to the base tree
 433 #   i_tree is set to the index tree
 434 #   u_tree is set to the untracked files tree
 435 #
 436 #   GIT_QUIET is set to t if -q is specified
 437 #   INDEX_OPTION is set to --index if --index is specified.
 438 #   FLAGS is set to the remaining flags (if allowed)
 439 #
 440 # dies if:
 441 #   * too many revisions specified
 442 #   * no revision is specified and there is no stash stack
 443 #   * a revision is specified which cannot be resolve to a SHA1
 444 #   * a non-existent stash reference is specified
 445 #   * unknown flags were set and ALLOW_UNKNOWN_FLAGS is not "t"
 446 #
 447
 448 parse_flags_and_rev()
 449 {
 450         test "$PARSE_CACHE" = "$*" && return 0 # optimisation
 451         PARSE_CACHE="$*"
 452
 453         IS_STASH_LIKE=
 454         IS_STASH_REF=
 455         INDEX_OPTION=
 456         s=
 457         w_commit=
 458         b_commit=
 459         i_commit=
 460         u_commit=
 461         w_tree=
 462         b_tree=
 463         i_tree=
 464         u_tree=
 465
 466         FLAGS=
 467         REV=
 468         for opt
 469         do
 470                 case "$opt" in
 471                         -q|--quiet)
 472                                 GIT_QUIET=-t
 473                         ;;
 474                         --index)
 475                                 INDEX_OPTION=--index
 476                         ;;
 477                         --help)
 478                                 show_help
 479                         ;;
 480                         -*)
 481                                 test "$ALLOW_UNKNOWN_FLAGS" = t ||
 482                                         die "$(eval_gettext "unknown option: \$opt")"
 483                                 FLAGS="${FLAGS}${FLAGS:+ }$opt"
 484                         ;;
 485                         *)
 486                                 REV="${REV}${REV:+ }'$opt'"
 487                         ;;
 488                 esac
 489         done
 490
 491         eval set -- $REV
 492
 493         case $# in
 494                 0)
 495                         have_stash || die "$(gettext "No stash entries found.")"
 496                         set -- ${ref_stash}@{0}
 497                 ;;
 498                 1)
 499                         :
 500                 ;;
 501                 *)
 502                         die "$(eval_gettext "Too many revisions specified: \$REV")"
 503                 ;;
 504         esac
 505
 506         case "$1" in
 507                 *[!0-9]*)
 508                         :
 509                 ;;
 510                 *)
 511                         set -- "${ref_stash}@{$1}"
 512                 ;;
 513         esac
 514
 515         REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
 516                 reference="$1"
 517                 die "$(eval_gettext "\$reference is not a valid reference")"
 518         }
 519
 520         i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
 521         set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
 522         s=$1 &&
 523         w_commit=$1 &&
 524         b_commit=$2 &&
 525         w_tree=$3 &&
 526         b_tree=$4 &&
 527         i_tree=$5 &&
 528         IS_STASH_LIKE=t &&
 529         test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
 530         IS_STASH_REF=t
 531
 532         u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
 533         u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
 534 }
 535
 536 is_stash_like()
 537 {
 538         parse_flags_and_rev "$@"
 539         test -n "$IS_STASH_LIKE"
 540 }
 541
 542 assert_stash_like() {
 543         is_stash_like "$@" || {
 544                 args="$*"
 545                 die "$(eval_gettext "'\$args' is not a stash-like commit")"
 546         }
 547 }
 548
 549 is_stash_ref() {
 550         is_stash_like "$@" && test -n "$IS_STASH_REF"
 551 }
 552
 553 assert_stash_ref() {
 554         is_stash_ref "$@" || {
 555                 args="$*"
 556                 die "$(eval_gettext "'\$args' is not a stash reference")"
 557         }
 558 }
 559
 560 apply_stash () {
 561
 562         assert_stash_like "$@"
 563
 564         git update-index -q --refresh || die "$(gettext "unable to refresh index")"
 565
 566         # current index state
 567         c_tree=$(git write-tree) ||
 568                 die "$(gettext "Cannot apply a stash in the middle of a merge")"
 569
 570         unstashed_index_tree=
 571         if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
 572                         test "$c_tree" != "$i_tree"
 573         then
 574                 git diff-tree --binary $s^2^..$s^2 | git apply --cached
 575                 test $? -ne 0 &&
 576                         die "$(gettext "Conflicts in index. Try without --index.")"
 577                 unstashed_index_tree=$(git write-tree) ||
 578                         die "$(gettext "Could not save index tree")"
 579                 git reset
 580         fi
 581
 582         if test -n "$u_tree"
 583         then
 584                 GIT_INDEX_FILE="$TMPindex" git read-tree "$u_tree" &&
 585                 GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
 586                 rm -f "$TMPindex" ||
 587                 die "$(gettext "Could not restore untracked files from stash entry")"
 588         fi
 589
 590         eval "
 591                 GITHEAD_$w_tree='Stashed changes' &&
 592                 GITHEAD_$c_tree='Updated upstream' &&
 593                 GITHEAD_$b_tree='Version stash was based on' &&
 594                 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
 595         "
 596
 597         if test -n "$GIT_QUIET"
 598         then
 599                 GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
 600         fi
 601         if git merge-recursive $b_tree -- $c_tree $w_tree
 602         then
 603                 # No conflict
 604                 if test -n "$unstashed_index_tree"
 605                 then
 606                         git read-tree "$unstashed_index_tree"
 607                 else
 608                         a="$TMP-added" &&
 609                         git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
 610                         git read-tree --reset $c_tree &&
 611                         git update-index --add --stdin <"$a" ||
 612                                 die "$(gettext "Cannot unstage modified files")"
 613                         rm -f "$a"
 614                 fi
 615                 squelch=
 616                 if test -n "$GIT_QUIET"
 617                 then
 618                         squelch='>/dev/null 2>&1'
 619                 fi
 620                 (cd "$START_DIR" && eval "git status $squelch") || :
 621         else
 622                 # Merge conflict; keep the exit status from merge-recursive
 623                 status=$?
 624                 git rerere
 625                 if test -n "$INDEX_OPTION"
 626                 then
 627                         gettextln "Index was not unstashed." >&2
 628                 fi
 629                 exit $status
 630         fi
 631 }
 632
 633 pop_stash() {
 634         assert_stash_ref "$@"
 635
 636         if apply_stash "$@"
 637         then
 638                 drop_stash "$@"
 639         else
 640                 status=$?
 641                 say "$(gettext "The stash entry is kept in case you need it again.")"
 642                 exit $status
 643         fi
 644 }
 645
 646 drop_stash () {
 647         assert_stash_ref "$@"
 648
 649         git reflog delete --updateref --rewrite "${REV}" &&
 650                 say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
 651                 die "$(eval_gettext "\${REV}: Could not drop stash entry")"
 652
 653         # clear_stash if we just dropped the last stash entry
 654         git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
 655         clear_stash
 656 }
 657
 658 apply_to_branch () {
 659         test -n "$1" || die "$(gettext "No branch name specified")"
 660         branch=$1
 661         shift 1
 662
 663         set -- --index "$@"
 664         assert_stash_like "$@"
 665
 666         git checkout -b $branch $REV^ &&
 667         apply_stash "$@" && {
 668                 test -z "$IS_STASH_REF" || drop_stash "$@"
 669         }
 670 }
 671
 672 test "$1" = "-p" && set "push" "$@"
 673
 674 PARSE_CACHE='--not-parsed'
 675 # The default command is "push" if nothing but options are given
 676 seen_non_option=
 677 for opt
 678 do
 679         case "$opt" in
 680         --) break ;;
 681         -*) ;;
 682         *) seen_non_option=t; break ;;
 683         esac
 684 done
 685
 686 test -n "$seen_non_option" || set "push" "$@"
 687
 688 # Main command set
 689 case "$1" in
 690 list)
 691         shift
 692         list_stash "$@"
 693         ;;
 694 show)
 695         shift
 696         show_stash "$@"
 697         ;;
 698 save)
 699         shift
 700         save_stash "$@"
 701         ;;
 702 push)
 703         shift
 704         push_stash "$@"
 705         ;;
 706 apply)
 707         shift
 708         apply_stash "$@"
 709         ;;
 710 clear)
 711         shift
 712         clear_stash "$@"
 713         ;;
 714 create)
 715         shift
 716         create_stash -m "$*" && echo "$w_commit"
 717         ;;
 718 store)
 719         shift
 720         store_stash "$@"
 721         ;;
 722 drop)
 723         shift
 724         drop_stash "$@"
 725         ;;
 726 pop)
 727         shift
 728         pop_stash "$@"
 729         ;;
 730 branch)
 731         shift
 732         apply_to_branch "$@"
 733         ;;
 734 *)
 735         case $# in
 736         0)
 737                 push_stash &&
 738                 say "$(gettext "(To restore them type \"git stash apply\")")"
 739                 ;;
 740         *)
 741                 usage
 742         esac
 743         ;;
 744 esac