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                         eval_gettextln "error: unknown option for 'stash push': \$option"
 264                         usage
 265                         ;;
 266                 *)
 267                         break
 268                         ;;
 269                 esac
 270                 shift
 271         done
 272
 273         eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
 274
 275         if test -n "$patch_mode" && test -n "$untracked"
 276         then
 277                 die "$(gettext "Can't use --patch and --include-untracked or --all at the same time")"
 278         fi
 279
 280         test -n "$untracked" || git ls-files --error-unmatch -- "$@" >/dev/null || exit 1
 281
 282         git update-index -q --refresh
 283         if no_changes "$@"
 284         then
 285                 say "$(gettext "No local changes to save")"
 286                 exit 0
 287         fi
 288
 289         git reflog exists $ref_stash ||
 290                 clear_stash || die "$(gettext "Cannot initialize stash")"
 291
 292         create_stash -m "$stash_msg" -u "$untracked" -- "$@"
 293         store_stash -m "$stash_msg" -q $w_commit ||
 294         die "$(gettext "Cannot save the current status")"
 295         say "$(eval_gettext "Saved working directory and index state \$stash_msg")"
 296
 297         if test -z "$patch_mode"
 298         then
 299                 test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
 300                 if test -n "$untracked"
 301                 then
 302                         git clean --force --quiet -d $CLEAN_X_OPTION -- "$@"
 303                 fi
 304
 305                 if test $# != 0
 306                 then
 307                         git reset -q -- "$@"
 308                         git ls-files -z --modified -- "$@" |
 309                         git checkout-index -z --force --stdin
 310                         git clean --force -q -d -- "$@"
 311                 else
 312                         git reset --hard -q
 313                 fi
 314
 315                 if test "$keep_index" = "t" && test -n "$i_tree"
 316                 then
 317                         git read-tree --reset $i_tree
 318                         git ls-files -z --modified -- "$@" |
 319                         git checkout-index -z --force --stdin
 320                 fi
 321         else
 322                 git apply -R < "$TMP-patch" ||
 323                 die "$(gettext "Cannot remove worktree changes")"
 324
 325                 if test "$keep_index" != "t"
 326                 then
 327                         git reset -q -- "$@"
 328                 fi
 329         fi
 330 }
 331
 332 save_stash () {
 333         push_options=
 334         while test $# != 0
 335         do
 336                 case "$1" in
 337                 --)
 338                         shift
 339                         break
 340                         ;;
 341                 -*)
 342                         # pass all options through to push_stash
 343                         push_options="$push_options $1"
 344                         ;;
 345                 *)
 346                         break
 347                         ;;
 348                 esac
 349                 shift
 350         done
 351
 352         stash_msg="$*"
 353
 354         if test -z "$stash_msg"
 355         then
 356                 push_stash $push_options
 357         else
 358                 push_stash $push_options -m "$stash_msg"
 359         fi
 360 }
 361
 362 have_stash () {
 363         git rev-parse --verify --quiet $ref_stash >/dev/null
 364 }
 365
 366 list_stash () {
 367         have_stash || return 0
 368         git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
 369 }
 370
 371 show_stash () {
 372         ALLOW_UNKNOWN_FLAGS=t
 373         assert_stash_like "$@"
 374
 375         if test -z "$FLAGS"
 376         then
 377                 if test "$(git config --bool stash.showStat || echo true)" = "true"
 378                 then
 379                         FLAGS=--stat
 380                 fi
 381
 382                 if test "$(git config --bool stash.showPatch || echo false)" = "true"
 383                 then
 384                         FLAGS=${FLAGS}${FLAGS:+ }-p
 385                 fi
 386
 387                 if test -z "$FLAGS"
 388                 then
 389                         return 0
 390                 fi
 391         fi
 392
 393         git diff ${FLAGS} $b_commit $w_commit
 394 }
 395
 396 show_help () {
 397         exec git help stash
 398         exit 1
 399 }
 400
 401 #
 402 # Parses the remaining options looking for flags and
 403 # at most one revision defaulting to ${ref_stash}@{0}
 404 # if none found.
 405 #
 406 # Derives related tree and commit objects from the
 407 # revision, if one is found.
 408 #
 409 # stash records the work tree, and is a merge between the
 410 # base commit (first parent) and the index tree (second parent).
 411 #
 412 #   REV is set to the symbolic version of the specified stash-like commit
 413 #   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
 414 #   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
 415 #   s is set to the SHA1 of the stash commit
 416 #   w_commit is set to the commit containing the working tree
 417 #   b_commit is set to the base commit
 418 #   i_commit is set to the commit containing the index tree
 419 #   u_commit is set to the commit containing the untracked files tree
 420 #   w_tree is set to the working tree
 421 #   b_tree is set to the base tree
 422 #   i_tree is set to the index tree
 423 #   u_tree is set to the untracked files tree
 424 #
 425 #   GIT_QUIET is set to t if -q is specified
 426 #   INDEX_OPTION is set to --index if --index is specified.
 427 #   FLAGS is set to the remaining flags (if allowed)
 428 #
 429 # dies if:
 430 #   * too many revisions specified
 431 #   * no revision is specified and there is no stash stack
 432 #   * a revision is specified which cannot be resolve to a SHA1
 433 #   * a non-existent stash reference is specified
 434 #   * unknown flags were set and ALLOW_UNKNOWN_FLAGS is not "t"
 435 #
 436
 437 parse_flags_and_rev()
 438 {
 439         test "$PARSE_CACHE" = "$*" && return 0 # optimisation
 440         PARSE_CACHE="$*"
 441
 442         IS_STASH_LIKE=
 443         IS_STASH_REF=
 444         INDEX_OPTION=
 445         s=
 446         w_commit=
 447         b_commit=
 448         i_commit=
 449         u_commit=
 450         w_tree=
 451         b_tree=
 452         i_tree=
 453         u_tree=
 454
 455         FLAGS=
 456         REV=
 457         for opt
 458         do
 459                 case "$opt" in
 460                         -q|--quiet)
 461                                 GIT_QUIET=-t
 462                         ;;
 463                         --index)
 464                                 INDEX_OPTION=--index
 465                         ;;
 466                         --help)
 467                                 show_help
 468                         ;;
 469                         -*)
 470                                 test "$ALLOW_UNKNOWN_FLAGS" = t ||
 471                                         die "$(eval_gettext "unknown option: \$opt")"
 472                                 FLAGS="${FLAGS}${FLAGS:+ }$opt"
 473                         ;;
 474                         *)
 475                                 REV="${REV}${REV:+ }'$opt'"
 476                         ;;
 477                 esac
 478         done
 479
 480         eval set -- $REV
 481
 482         case $# in
 483                 0)
 484                         have_stash || die "$(gettext "No stash entries found.")"
 485                         set -- ${ref_stash}@{0}
 486                 ;;
 487                 1)
 488                         :
 489                 ;;
 490                 *)
 491                         die "$(eval_gettext "Too many revisions specified: \$REV")"
 492                 ;;
 493         esac
 494
 495         case "$1" in
 496                 *[!0-9]*)
 497                         :
 498                 ;;
 499                 *)
 500                         set -- "${ref_stash}@{$1}"
 501                 ;;
 502         esac
 503
 504         REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
 505                 reference="$1"
 506                 die "$(eval_gettext "\$reference is not a valid reference")"
 507         }
 508
 509         i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
 510         set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
 511         s=$1 &&
 512         w_commit=$1 &&
 513         b_commit=$2 &&
 514         w_tree=$3 &&
 515         b_tree=$4 &&
 516         i_tree=$5 &&
 517         IS_STASH_LIKE=t &&
 518         test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
 519         IS_STASH_REF=t
 520
 521         u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
 522         u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
 523 }
 524
 525 is_stash_like()
 526 {
 527         parse_flags_and_rev "$@"
 528         test -n "$IS_STASH_LIKE"
 529 }
 530
 531 assert_stash_like() {
 532         is_stash_like "$@" || {
 533                 args="$*"
 534                 die "$(eval_gettext "'\$args' is not a stash-like commit")"
 535         }
 536 }
 537
 538 is_stash_ref() {
 539         is_stash_like "$@" && test -n "$IS_STASH_REF"
 540 }
 541
 542 assert_stash_ref() {
 543         is_stash_ref "$@" || {
 544                 args="$*"
 545                 die "$(eval_gettext "'\$args' is not a stash reference")"
 546         }
 547 }
 548
 549 apply_stash () {
 550
 551         assert_stash_like "$@"
 552
 553         git update-index -q --refresh || die "$(gettext "unable to refresh index")"
 554
 555         # current index state
 556         c_tree=$(git write-tree) ||
 557                 die "$(gettext "Cannot apply a stash in the middle of a merge")"
 558
 559         unstashed_index_tree=
 560         if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
 561                         test "$c_tree" != "$i_tree"
 562         then
 563                 git diff-tree --binary $s^2^..$s^2 | git apply --cached
 564                 test $? -ne 0 &&
 565                         die "$(gettext "Conflicts in index. Try without --index.")"
 566                 unstashed_index_tree=$(git write-tree) ||
 567                         die "$(gettext "Could not save index tree")"
 568                 git reset
 569         fi
 570
 571         if test -n "$u_tree"
 572         then
 573                 GIT_INDEX_FILE="$TMPindex" git read-tree "$u_tree" &&
 574                 GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
 575                 rm -f "$TMPindex" ||
 576                 die "$(gettext "Could not restore untracked files from stash entry")"
 577         fi
 578
 579         eval "
 580                 GITHEAD_$w_tree='Stashed changes' &&
 581                 GITHEAD_$c_tree='Updated upstream' &&
 582                 GITHEAD_$b_tree='Version stash was based on' &&
 583                 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
 584         "
 585
 586         if test -n "$GIT_QUIET"
 587         then
 588                 GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
 589         fi
 590         if git merge-recursive $b_tree -- $c_tree $w_tree
 591         then
 592                 # No conflict
 593                 if test -n "$unstashed_index_tree"
 594                 then
 595                         git read-tree "$unstashed_index_tree"
 596                 else
 597                         a="$TMP-added" &&
 598                         git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
 599                         git read-tree --reset $c_tree &&
 600                         git update-index --add --stdin <"$a" ||
 601                                 die "$(gettext "Cannot unstage modified files")"
 602                         rm -f "$a"
 603                 fi
 604                 squelch=
 605                 if test -n "$GIT_QUIET"
 606                 then
 607                         squelch='>/dev/null 2>&1'
 608                 fi
 609                 (cd "$START_DIR" && eval "git status $squelch") || :
 610         else
 611                 # Merge conflict; keep the exit status from merge-recursive
 612                 status=$?
 613                 git rerere
 614                 if test -n "$INDEX_OPTION"
 615                 then
 616                         gettextln "Index was not unstashed." >&2
 617                 fi
 618                 exit $status
 619         fi
 620 }
 621
 622 pop_stash() {
 623         assert_stash_ref "$@"
 624
 625         if apply_stash "$@"
 626         then
 627                 drop_stash "$@"
 628         else
 629                 status=$?
 630                 say "$(gettext "The stash entry is kept in case you need it again.")"
 631                 exit $status
 632         fi
 633 }
 634
 635 drop_stash () {
 636         assert_stash_ref "$@"
 637
 638         git reflog delete --updateref --rewrite "${REV}" &&
 639                 say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
 640                 die "$(eval_gettext "\${REV}: Could not drop stash entry")"
 641
 642         # clear_stash if we just dropped the last stash entry
 643         git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
 644         clear_stash
 645 }
 646
 647 apply_to_branch () {
 648         test -n "$1" || die "$(gettext "No branch name specified")"
 649         branch=$1
 650         shift 1
 651
 652         set -- --index "$@"
 653         assert_stash_like "$@"
 654
 655         git checkout -b $branch $REV^ &&
 656         apply_stash "$@" && {
 657                 test -z "$IS_STASH_REF" || drop_stash "$@"
 658         }
 659 }
 660
 661 test "$1" = "-p" && set "push" "$@"
 662
 663 PARSE_CACHE='--not-parsed'
 664 # The default command is "push" if nothing but options are given
 665 seen_non_option=
 666 for opt
 667 do
 668         case "$opt" in
 669         --) break ;;
 670         -*) ;;
 671         *) seen_non_option=t; break ;;
 672         esac
 673 done
 674
 675 test -n "$seen_non_option" || set "push" "$@"
 676
 677 # Main command set
 678 case "$1" in
 679 list)
 680         shift
 681         list_stash "$@"
 682         ;;
 683 show)
 684         shift
 685         show_stash "$@"
 686         ;;
 687 save)
 688         shift
 689         save_stash "$@"
 690         ;;
 691 push)
 692         shift
 693         push_stash "$@"
 694         ;;
 695 apply)
 696         shift
 697         apply_stash "$@"
 698         ;;
 699 clear)
 700         shift
 701         clear_stash "$@"
 702         ;;
 703 create)
 704         shift
 705         create_stash -m "$*" && echo "$w_commit"
 706         ;;
 707 store)
 708         shift
 709         store_stash "$@"
 710         ;;
 711 drop)
 712         shift
 713         drop_stash "$@"
 714         ;;
 715 pop)
 716         shift
 717         pop_stash "$@"
 718         ;;
 719 branch)
 720         shift
 721         apply_to_branch "$@"
 722         ;;
 723 *)
 724         case $# in
 725         0)
 726                 push_stash &&
 727                 say "$(gettext "(To restore them type \"git stash apply\")")"
 728                 ;;
 729         *)
 730                 usage
 731         esac
 732         ;;
 733 esac