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.$$"
  23 TMPindex=${GIT_INDEX_FILE-"$(git rev-parse --git-path index)"}.stash.$$
  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         : >>"$(git rev-parse --git-path logs/$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 "$(git rev-parse --git-path logs/$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 $ref_stash >/dev/null
 296 }
 297
 298 list_stash () {
 299         have_stash || return 0
 300         git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
 301 }
 302
 303 show_stash () {
 304         assert_stash_like "$@"
 305
 306         git diff ${FLAGS:---stat} $b_commit $w_commit
 307 }
 308
 309 #
 310 # Parses the remaining options looking for flags and
 311 # at most one revision defaulting to ${ref_stash}@{0}
 312 # if none found.
 313 #
 314 # Derives related tree and commit objects from the
 315 # revision, if one is found.
 316 #
 317 # stash records the work tree, and is a merge between the
 318 # base commit (first parent) and the index tree (second parent).
 319 #
 320 #   REV is set to the symbolic version of the specified stash-like commit
 321 #   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
 322 #   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
 323 #   s is set to the SHA1 of the stash commit
 324 #   w_commit is set to the commit containing the working tree
 325 #   b_commit is set to the base commit
 326 #   i_commit is set to the commit containing the index tree
 327 #   u_commit is set to the commit containing the untracked files tree
 328 #   w_tree is set to the working tree
 329 #   b_tree is set to the base tree
 330 #   i_tree is set to the index tree
 331 #   u_tree is set to the untracked files tree
 332 #
 333 #   GIT_QUIET is set to t if -q is specified
 334 #   INDEX_OPTION is set to --index if --index is specified.
 335 #   FLAGS is set to the remaining flags
 336 #
 337 # dies if:
 338 #   * too many revisions specified
 339 #   * no revision is specified and there is no stash stack
 340 #   * a revision is specified which cannot be resolve to a SHA1
 341 #   * a non-existent stash reference is specified
 342 #
 343
 344 parse_flags_and_rev()
 345 {
 346         test "$PARSE_CACHE" = "$*" && return 0 # optimisation
 347         PARSE_CACHE="$*"
 348
 349         IS_STASH_LIKE=
 350         IS_STASH_REF=
 351         INDEX_OPTION=
 352         s=
 353         w_commit=
 354         b_commit=
 355         i_commit=
 356         u_commit=
 357         w_tree=
 358         b_tree=
 359         i_tree=
 360         u_tree=
 361
 362         REV=$(git rev-parse --no-flags --symbolic --sq "$@") || exit 1
 363
 364         FLAGS=
 365         for opt
 366         do
 367                 case "$opt" in
 368                         -q|--quiet)
 369                                 GIT_QUIET=-t
 370                         ;;
 371                         --index)
 372                                 INDEX_OPTION=--index
 373                         ;;
 374                         -*)
 375                                 FLAGS="${FLAGS}${FLAGS:+ }$opt"
 376                         ;;
 377                 esac
 378         done
 379
 380         eval set -- $REV
 381
 382         case $# in
 383                 0)
 384                         have_stash || die "$(gettext "No stash found.")"
 385                         set -- ${ref_stash}@{0}
 386                 ;;
 387                 1)
 388                         :
 389                 ;;
 390                 *)
 391                         die "$(eval_gettext "Too many revisions specified: \$REV")"
 392                 ;;
 393         esac
 394
 395         REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
 396                 reference="$1"
 397                 die "$(eval_gettext "\$reference is not a valid reference")"
 398         }
 399
 400         i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
 401         set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
 402         s=$1 &&
 403         w_commit=$1 &&
 404         b_commit=$2 &&
 405         w_tree=$3 &&
 406         b_tree=$4 &&
 407         i_tree=$5 &&
 408         IS_STASH_LIKE=t &&
 409         test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
 410         IS_STASH_REF=t
 411
 412         u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
 413         u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
 414 }
 415
 416 is_stash_like()
 417 {
 418         parse_flags_and_rev "$@"
 419         test -n "$IS_STASH_LIKE"
 420 }
 421
 422 assert_stash_like() {
 423         is_stash_like "$@" || {
 424                 args="$*"
 425                 die "$(eval_gettext "'\$args' is not a stash-like commit")"
 426         }
 427 }
 428
 429 is_stash_ref() {
 430         is_stash_like "$@" && test -n "$IS_STASH_REF"
 431 }
 432
 433 assert_stash_ref() {
 434         is_stash_ref "$@" || {
 435                 args="$*"
 436                 die "$(eval_gettext "'\$args' is not a stash reference")"
 437         }
 438 }
 439
 440 apply_stash () {
 441
 442         assert_stash_like "$@"
 443
 444         git update-index -q --refresh || die "$(gettext "unable to refresh index")"
 445
 446         # current index state
 447         c_tree=$(git write-tree) ||
 448                 die "$(gettext "Cannot apply a stash in the middle of a merge")"
 449
 450         unstashed_index_tree=
 451         if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
 452                         test "$c_tree" != "$i_tree"
 453         then
 454                 git diff-tree --binary $s^2^..$s^2 | git apply --cached
 455                 test $? -ne 0 &&
 456                         die "$(gettext "Conflicts in index. Try without --index.")"
 457                 unstashed_index_tree=$(git write-tree) ||
 458                         die "$(gettext "Could not save index tree")"
 459                 git reset
 460         fi
 461
 462         if test -n "$u_tree"
 463         then
 464                 GIT_INDEX_FILE="$TMPindex" git-read-tree "$u_tree" &&
 465                 GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
 466                 rm -f "$TMPindex" ||
 467                 die 'Could not restore untracked files from stash'
 468         fi
 469
 470         eval "
 471                 GITHEAD_$w_tree='Stashed changes' &&
 472                 GITHEAD_$c_tree='Updated upstream' &&
 473                 GITHEAD_$b_tree='Version stash was based on' &&
 474                 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
 475         "
 476
 477         if test -n "$GIT_QUIET"
 478         then
 479                 GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
 480         fi
 481         if git merge-recursive $b_tree -- $c_tree $w_tree
 482         then
 483                 # No conflict
 484                 if test -n "$unstashed_index_tree"
 485                 then
 486                         git read-tree "$unstashed_index_tree"
 487                 else
 488                         a="$TMP-added" &&
 489                         git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
 490                         git read-tree --reset $c_tree &&
 491                         git update-index --add --stdin <"$a" ||
 492                                 die "$(gettext "Cannot unstage modified files")"
 493                         rm -f "$a"
 494                 fi
 495                 squelch=
 496                 if test -n "$GIT_QUIET"
 497                 then
 498                         squelch='>/dev/null 2>&1'
 499                 fi
 500                 (cd "$START_DIR" && eval "git status $squelch") || :
 501         else
 502                 # Merge conflict; keep the exit status from merge-recursive
 503                 status=$?
 504                 git rerere
 505                 if test -n "$INDEX_OPTION"
 506                 then
 507                         gettextln "Index was not unstashed." >&2
 508                 fi
 509                 exit $status
 510         fi
 511 }
 512
 513 pop_stash() {
 514         assert_stash_ref "$@"
 515
 516         if apply_stash "$@"
 517         then
 518                 drop_stash "$@"
 519         else
 520                 status=$?
 521                 say "The stash is kept in case you need it again."
 522                 exit $status
 523         fi
 524 }
 525
 526 drop_stash () {
 527         assert_stash_ref "$@"
 528
 529         git reflog delete --updateref --rewrite "${REV}" &&
 530                 say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
 531                 die "$(eval_gettext "\${REV}: Could not drop stash entry")"
 532
 533         # clear_stash if we just dropped the last stash entry
 534         git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
 535         clear_stash
 536 }
 537
 538 apply_to_branch () {
 539         test -n "$1" || die "$(gettext "No branch name specified")"
 540         branch=$1
 541         shift 1
 542
 543         set -- --index "$@"
 544         assert_stash_like "$@"
 545
 546         git checkout -b $branch $REV^ &&
 547         apply_stash "$@" && {
 548                 test -z "$IS_STASH_REF" || drop_stash "$@"
 549         }
 550 }
 551
 552 PARSE_CACHE='--not-parsed'
 553 # The default command is "save" if nothing but options are given
 554 seen_non_option=
 555 for opt
 556 do
 557         case "$opt" in
 558         -*) ;;
 559         *) seen_non_option=t; break ;;
 560         esac
 561 done
 562
 563 test -n "$seen_non_option" || set "save" "$@"
 564
 565 # Main command set
 566 case "$1" in
 567 list)
 568         shift
 569         list_stash "$@"
 570         ;;
 571 show)
 572         shift
 573         show_stash "$@"
 574         ;;
 575 save)
 576         shift
 577         save_stash "$@"
 578         ;;
 579 apply)
 580         shift
 581         apply_stash "$@"
 582         ;;
 583 clear)
 584         shift
 585         clear_stash "$@"
 586         ;;
 587 create)
 588         shift
 589         create_stash "$*" && echo "$w_commit"
 590         ;;
 591 store)
 592         shift
 593         store_stash "$@"
 594         ;;
 595 drop)
 596         shift
 597         drop_stash "$@"
 598         ;;
 599 pop)
 600         shift
 601         pop_stash "$@"
 602         ;;
 603 branch)
 604         shift
 605         apply_to_branch "$@"
 606         ;;
 607 *)
 608         case $# in
 609         0)
 610                 save_stash &&
 611                 say "$(gettext "(To restore them type \"git stash apply\")")"
 612                 ;;
 613         *)
 614                 usage
 615         esac
 616         ;;
 617 esac