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: $dashless clear"
  13
  14 SUBDIRECTORY_OK=Yes
  15 OPTIONS_SPEC=
  16 START_DIR=$(pwd)
  17 . git-sh-setup
  18 . git-sh-i18n
  19 require_work_tree
  20 cd_to_toplevel
  21
  22 TMP="$GIT_DIR/.git-stash.$$"
  23 TMPindex=${GIT_INDEX_FILE-"$GIT_DIR/index"}.stash.$$
  24 trap 'rm -f "$TMP-"* "$TMPindex"' 0
  25
  26 ref_stash=refs/stash
  27
  28 if git config --get-colorbool color.interactive; then
  29        help_color="$(git config --get-color color.interactive.help 'red bold')"
  30        reset_color="$(git config --get-color '' reset)"
  31 else
  32        help_color=
  33        reset_color=
  34 fi
  35
  36 no_changes () {
  37         git diff-index --quiet --cached HEAD --ignore-submodules -- &&
  38         git diff-files --quiet --ignore-submodules &&
  39         (test -z "$untracked" || test -z "$(untracked_files)")
  40 }
  41
  42 untracked_files () {
  43         excl_opt=--exclude-standard
  44         test "$untracked" = "all" && excl_opt=
  45         git ls-files -o -z $excl_opt
  46 }
  47
  48 clear_stash () {
  49         if test $# != 0
  50         then
  51                 die "$(gettext "git stash clear with parameters is unimplemented")"
  52         fi
  53         if current=$(git rev-parse --verify --quiet $ref_stash)
  54         then
  55                 git update-ref -d $ref_stash $current
  56         fi
  57 }
  58
  59 create_stash () {
  60         stash_msg="$1"
  61         untracked="$2"
  62
  63         git update-index -q --refresh
  64         if no_changes
  65         then
  66                 exit 0
  67         fi
  68
  69         # state of the base commit
  70         if b_commit=$(git rev-parse --verify HEAD)
  71         then
  72                 head=$(git rev-list --oneline -n 1 HEAD --)
  73         else
  74                 die "$(gettext "You do not have the initial commit yet")"
  75         fi
  76
  77         if branch=$(git symbolic-ref -q HEAD)
  78         then
  79                 branch=${branch#refs/heads/}
  80         else
  81                 branch='(no branch)'
  82         fi
  83         msg=$(printf '%s: %s' "$branch" "$head")
  84
  85         # state of the index
  86         i_tree=$(git write-tree) &&
  87         i_commit=$(printf 'index on %s\n' "$msg" |
  88                 git commit-tree $i_tree -p $b_commit) ||
  89                 die "$(gettext "Cannot save the current index state")"
  90
  91         if test -n "$untracked"
  92         then
  93                 # Untracked files are stored by themselves in a parentless commit, for
  94                 # ease of unpacking later.
  95                 u_commit=$(
  96                         untracked_files | (
  97                                 GIT_INDEX_FILE="$TMPindex" &&
  98                                 export GIT_INDEX_FILE &&
  99                                 rm -f "$TMPindex" &&
 100                                 git update-index -z --add --remove --stdin &&
 101                                 u_tree=$(git write-tree) &&
 102                                 printf 'untracked files on %s\n' "$msg" | git commit-tree $u_tree  &&
 103                                 rm -f "$TMPindex"
 104                 ) ) || die "Cannot save the untracked files"
 105
 106                 untracked_commit_option="-p $u_commit";
 107         else
 108                 untracked_commit_option=
 109         fi
 110
 111         if test -z "$patch_mode"
 112         then
 113
 114                 # state of the working tree
 115                 w_tree=$( (
 116                         git read-tree --index-output="$TMPindex" -m $i_tree &&
 117                         GIT_INDEX_FILE="$TMPindex" &&
 118                         export GIT_INDEX_FILE &&
 119                         git diff --name-only -z HEAD -- >"$TMP-stagenames" &&
 120                         git update-index -z --add --remove --stdin <"$TMP-stagenames" &&
 121                         git write-tree &&
 122                         rm -f "$TMPindex"
 123                 ) ) ||
 124                         die "$(gettext "Cannot save the current worktree state")"
 125
 126         else
 127
 128                 rm -f "$TMP-index" &&
 129                 GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
 130
 131                 # find out what the user wants
 132                 GIT_INDEX_FILE="$TMP-index" \
 133                         git add--interactive --patch=stash -- &&
 134
 135                 # state of the working tree
 136                 w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
 137                 die "$(gettext "Cannot save the current worktree state")"
 138
 139                 git diff-tree -p HEAD $w_tree -- >"$TMP-patch" &&
 140                 test -s "$TMP-patch" ||
 141                 die "$(gettext "No changes selected")"
 142
 143                 rm -f "$TMP-index" ||
 144                 die "$(gettext "Cannot remove temporary index (can't happen)")"
 145
 146         fi
 147
 148         # create the stash
 149         if test -z "$stash_msg"
 150         then
 151                 stash_msg=$(printf 'WIP on %s' "$msg")
 152         else
 153                 stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
 154         fi
 155         w_commit=$(printf '%s\n' "$stash_msg" |
 156         git commit-tree $w_tree -p $b_commit -p $i_commit $untracked_commit_option) ||
 157         die "$(gettext "Cannot record working tree state")"
 158 }
 159
 160 store_stash () {
 161         while test $# != 0
 162         do
 163                 case "$1" in
 164                 -m|--message)
 165                         shift
 166                         stash_msg="$1"
 167                         ;;
 168                 -q|--quiet)
 169                         quiet=t
 170                         ;;
 171                 *)
 172                         break
 173                         ;;
 174                 esac
 175                 shift
 176         done
 177         test $# = 1 ||
 178         die "$(eval_gettext "\"$dashless store\" requires one <commit> argument")"
 179
 180         w_commit="$1"
 181         if test -z "$stash_msg"
 182         then
 183                 stash_msg="Created via \"git stash store\"."
 184         fi
 185
 186         # Make sure the reflog for stash is kept.
 187         : >>"$GIT_DIR/logs/$ref_stash"
 188         git update-ref -m "$stash_msg" $ref_stash $w_commit
 189         ret=$?
 190         test $ret != 0 && test -z $quiet &&
 191         die "$(eval_gettext "Cannot update \$ref_stash with \$w_commit")"
 192         return $ret
 193 }
 194
 195 save_stash () {
 196         keep_index=
 197         patch_mode=
 198         untracked=
 199         while test $# != 0
 200         do
 201                 case "$1" in
 202                 -k|--keep-index)
 203                         keep_index=t
 204                         ;;
 205                 --no-keep-index)
 206                         keep_index=n
 207                         ;;
 208                 -p|--patch)
 209                         patch_mode=t
 210                         # only default to keep if we don't already have an override
 211                         test -z "$keep_index" && keep_index=t
 212                         ;;
 213                 -q|--quiet)
 214                         GIT_QUIET=t
 215                         ;;
 216                 -u|--include-untracked)
 217                         untracked=untracked
 218                         ;;
 219                 -a|--all)
 220                         untracked=all
 221                         ;;
 222                 --)
 223                         shift
 224                         break
 225                         ;;
 226                 -*)
 227                         option="$1"
 228                         # TRANSLATORS: $option is an invalid option, like
 229                         # `--blah-blah'. The 7 spaces at the beginning of the
 230                         # second line correspond to "error: ". So you should line
 231                         # up the second line with however many characters the
 232                         # translation of "error: " takes in your language. E.g. in
 233                         # English this is:
 234                         #
 235                         #    $ git stash save --blah-blah 2>&1 | head -n 2
 236                         #    error: unknown option for 'stash save': --blah-blah
 237                         #           To provide a message, use git stash save -- '--blah-blah'
 238                         eval_gettextln "error: unknown option for 'stash save': \$option
 239        To provide a message, use git stash save -- '\$option'"
 240                         usage
 241                         ;;
 242                 *)
 243                         break
 244                         ;;
 245                 esac
 246                 shift
 247         done
 248
 249         if test -n "$patch_mode" && test -n "$untracked"
 250         then
 251             die "Can't use --patch and --include-untracked or --all at the same time"
 252         fi
 253
 254         stash_msg="$*"
 255
 256         git update-index -q --refresh
 257         if no_changes
 258         then
 259                 say "$(gettext "No local changes to save")"
 260                 exit 0
 261         fi
 262         test -f "$GIT_DIR/logs/$ref_stash" ||
 263                 clear_stash || die "$(gettext "Cannot initialize stash")"
 264
 265         create_stash "$stash_msg" $untracked
 266         store_stash -m "$stash_msg" -q $w_commit ||
 267         die "$(gettext "Cannot save the current status")"
 268         say Saved working directory and index state "$stash_msg"
 269
 270         if test -z "$patch_mode"
 271         then
 272                 git reset --hard ${GIT_QUIET:+-q}
 273                 test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
 274                 if test -n "$untracked"
 275                 then
 276                         git clean --force --quiet -d $CLEAN_X_OPTION
 277                 fi
 278
 279                 if test "$keep_index" = "t" && test -n $i_tree
 280                 then
 281                         git read-tree --reset -u $i_tree
 282                 fi
 283         else
 284                 git apply -R < "$TMP-patch" ||
 285                 die "$(gettext "Cannot remove worktree changes")"
 286
 287                 if test "$keep_index" != "t"
 288                 then
 289                         git reset
 290                 fi
 291         fi
 292 }
 293
 294 have_stash () {
 295         git rev-parse --verify --quiet $ref_stash >/dev/null
 296 }
 297
 298 list_stash () {
 299         have_stash || return 0
 300         git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
 301 }
 302
 303 show_stash () {
 304         ALLOW_UNKNOWN_FLAGS=t
 305         assert_stash_like "$@"
 306
 307         git diff ${FLAGS:---stat} $b_commit $w_commit
 308 }
 309
 310 #
 311 # Parses the remaining options looking for flags and
 312 # at most one revision defaulting to ${ref_stash}@{0}
 313 # if none found.
 314 #
 315 # Derives related tree and commit objects from the
 316 # revision, if one is found.
 317 #
 318 # stash records the work tree, and is a merge between the
 319 # base commit (first parent) and the index tree (second parent).
 320 #
 321 #   REV is set to the symbolic version of the specified stash-like commit
 322 #   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
 323 #   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
 324 #   s is set to the SHA1 of the stash commit
 325 #   w_commit is set to the commit containing the working tree
 326 #   b_commit is set to the base commit
 327 #   i_commit is set to the commit containing the index tree
 328 #   u_commit is set to the commit containing the untracked files tree
 329 #   w_tree is set to the working tree
 330 #   b_tree is set to the base tree
 331 #   i_tree is set to the index tree
 332 #   u_tree is set to the untracked files tree
 333 #
 334 #   GIT_QUIET is set to t if -q is specified
 335 #   INDEX_OPTION is set to --index if --index is specified.
 336 #   FLAGS is set to the remaining flags (if allowed)
 337 #
 338 # dies if:
 339 #   * too many revisions specified
 340 #   * no revision is specified and there is no stash stack
 341 #   * a revision is specified which cannot be resolve to a SHA1
 342 #   * a non-existent stash reference is specified
 343 #   * unknown flags were set and ALLOW_UNKNOWN_FLAGS is not "t"
 344 #
 345
 346 parse_flags_and_rev()
 347 {
 348         test "$PARSE_CACHE" = "$*" && return 0 # optimisation
 349         PARSE_CACHE="$*"
 350
 351         IS_STASH_LIKE=
 352         IS_STASH_REF=
 353         INDEX_OPTION=
 354         s=
 355         w_commit=
 356         b_commit=
 357         i_commit=
 358         u_commit=
 359         w_tree=
 360         b_tree=
 361         i_tree=
 362         u_tree=
 363
 364         REV=$(git rev-parse --no-flags --symbolic --sq "$@") || exit 1
 365
 366         FLAGS=
 367         for opt
 368         do
 369                 case "$opt" in
 370                         -q|--quiet)
 371                                 GIT_QUIET=-t
 372                         ;;
 373                         --index)
 374                                 INDEX_OPTION=--index
 375                         ;;
 376                         -*)
 377                                 test "$ALLOW_UNKNOWN_FLAGS" = t ||
 378                                         die "$(eval_gettext "unknown option: \$opt")"
 379                                 FLAGS="${FLAGS}${FLAGS:+ }$opt"
 380                         ;;
 381                 esac
 382         done
 383
 384         eval set -- $REV
 385
 386         case $# in
 387                 0)
 388                         have_stash || die "$(gettext "No stash found.")"
 389                         set -- ${ref_stash}@{0}
 390                 ;;
 391                 1)
 392                         :
 393                 ;;
 394                 *)
 395                         die "$(eval_gettext "Too many revisions specified: \$REV")"
 396                 ;;
 397         esac
 398
 399         REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
 400                 reference="$1"
 401                 die "$(eval_gettext "\$reference is not a valid reference")"
 402         }
 403
 404         i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
 405         set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
 406         s=$1 &&
 407         w_commit=$1 &&
 408         b_commit=$2 &&
 409         w_tree=$3 &&
 410         b_tree=$4 &&
 411         i_tree=$5 &&
 412         IS_STASH_LIKE=t &&
 413         test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
 414         IS_STASH_REF=t
 415
 416         u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
 417         u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
 418 }
 419
 420 is_stash_like()
 421 {
 422         parse_flags_and_rev "$@"
 423         test -n "$IS_STASH_LIKE"
 424 }
 425
 426 assert_stash_like() {
 427         is_stash_like "$@" || {
 428                 args="$*"
 429                 die "$(eval_gettext "'\$args' is not a stash-like commit")"
 430         }
 431 }
 432
 433 is_stash_ref() {
 434         is_stash_like "$@" && test -n "$IS_STASH_REF"
 435 }
 436
 437 assert_stash_ref() {
 438         is_stash_ref "$@" || {
 439                 args="$*"
 440                 die "$(eval_gettext "'\$args' is not a stash reference")"
 441         }
 442 }
 443
 444 apply_stash () {
 445
 446         assert_stash_like "$@"
 447
 448         git update-index -q --refresh || die "$(gettext "unable to refresh index")"
 449
 450         # current index state
 451         c_tree=$(git write-tree) ||
 452                 die "$(gettext "Cannot apply a stash in the middle of a merge")"
 453
 454         unstashed_index_tree=
 455         if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
 456                         test "$c_tree" != "$i_tree"
 457         then
 458                 git diff-tree --binary $s^2^..$s^2 | git apply --cached
 459                 test $? -ne 0 &&
 460                         die "$(gettext "Conflicts in index. Try without --index.")"
 461                 unstashed_index_tree=$(git write-tree) ||
 462                         die "$(gettext "Could not save index tree")"
 463                 git reset
 464         fi
 465
 466         if test -n "$u_tree"
 467         then
 468                 GIT_INDEX_FILE="$TMPindex" git-read-tree "$u_tree" &&
 469                 GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
 470                 rm -f "$TMPindex" ||
 471                 die 'Could not restore untracked files from stash'
 472         fi
 473
 474         eval "
 475                 GITHEAD_$w_tree='Stashed changes' &&
 476                 GITHEAD_$c_tree='Updated upstream' &&
 477                 GITHEAD_$b_tree='Version stash was based on' &&
 478                 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
 479         "
 480
 481         if test -n "$GIT_QUIET"
 482         then
 483                 GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
 484         fi
 485         if git merge-recursive $b_tree -- $c_tree $w_tree
 486         then
 487                 # No conflict
 488                 if test -n "$unstashed_index_tree"
 489                 then
 490                         git read-tree "$unstashed_index_tree"
 491                 else
 492                         a="$TMP-added" &&
 493                         git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
 494                         git read-tree --reset $c_tree &&
 495                         git update-index --add --stdin <"$a" ||
 496                                 die "$(gettext "Cannot unstage modified files")"
 497                         rm -f "$a"
 498                 fi
 499                 squelch=
 500                 if test -n "$GIT_QUIET"
 501                 then
 502                         squelch='>/dev/null 2>&1'
 503                 fi
 504                 (cd "$START_DIR" && eval "git status $squelch") || :
 505         else
 506                 # Merge conflict; keep the exit status from merge-recursive
 507                 status=$?
 508                 git rerere
 509                 if test -n "$INDEX_OPTION"
 510                 then
 511                         gettextln "Index was not unstashed." >&2
 512                 fi
 513                 exit $status
 514         fi
 515 }
 516
 517 pop_stash() {
 518         assert_stash_ref "$@"
 519
 520         if apply_stash "$@"
 521         then
 522                 drop_stash "$@"
 523         else
 524                 status=$?
 525                 say "The stash is kept in case you need it again."
 526                 exit $status
 527         fi
 528 }
 529
 530 drop_stash () {
 531         assert_stash_ref "$@"
 532
 533         git reflog delete --updateref --rewrite "${REV}" &&
 534                 say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
 535                 die "$(eval_gettext "\${REV}: Could not drop stash entry")"
 536
 537         # clear_stash if we just dropped the last stash entry
 538         git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
 539         clear_stash
 540 }
 541
 542 apply_to_branch () {
 543         test -n "$1" || die "$(gettext "No branch name specified")"
 544         branch=$1
 545         shift 1
 546
 547         set -- --index "$@"
 548         assert_stash_like "$@"
 549
 550         git checkout -b $branch $REV^ &&
 551         apply_stash "$@" && {
 552                 test -z "$IS_STASH_REF" || drop_stash "$@"
 553         }
 554 }
 555
 556 PARSE_CACHE='--not-parsed'
 557 # The default command is "save" if nothing but options are given
 558 seen_non_option=
 559 for opt
 560 do
 561         case "$opt" in
 562         -*) ;;
 563         *) seen_non_option=t; break ;;
 564         esac
 565 done
 566
 567 test -n "$seen_non_option" || set "save" "$@"
 568
 569 # Main command set
 570 case "$1" in
 571 list)
 572         shift
 573         list_stash "$@"
 574         ;;
 575 show)
 576         shift
 577         show_stash "$@"
 578         ;;
 579 save)
 580         shift
 581         save_stash "$@"
 582         ;;
 583 apply)
 584         shift
 585         apply_stash "$@"
 586         ;;
 587 clear)
 588         shift
 589         clear_stash "$@"
 590         ;;
 591 create)
 592         shift
 593         create_stash "$*" && echo "$w_commit"
 594         ;;
 595 store)
 596         shift
 597         store_stash "$@"
 598         ;;
 599 drop)
 600         shift
 601         drop_stash "$@"
 602         ;;
 603 pop)
 604         shift
 605         pop_stash "$@"
 606         ;;
 607 branch)
 608         shift
 609         apply_to_branch "$@"
 610         ;;
 611 *)
 612         case $# in
 613         0)
 614                 save_stash &&
 615                 say "$(gettext "(To restore them type \"git stash apply\")")"
 616                 ;;
 617         *)
 618                 usage
 619         esac
 620         ;;
 621 esac