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 require_work_tree
  19 cd_to_toplevel
  20
  21 TMP="$GIT_DIR/.git-stash.$$"
  22 TMPindex=${GIT_INDEX_FILE-"$(git rev-parse --git-path index)"}.stash.$$
  23 trap 'rm -f "$TMP-"* "$TMPindex"' 0
  24
  25 ref_stash=refs/stash
  26
  27 if git config --get-colorbool color.interactive; then
  28        help_color="$(git config --get-color color.interactive.help 'red bold')"
  29        reset_color="$(git config --get-color '' reset)"
  30 else
  31        help_color=
  32        reset_color=
  33 fi
  34
  35 no_changes () {
  36         git diff-index --quiet --cached HEAD --ignore-submodules -- &&
  37         git diff-files --quiet --ignore-submodules &&
  38         (test -z "$untracked" || test -z "$(untracked_files)")
  39 }
  40
  41 untracked_files () {
  42         excl_opt=--exclude-standard
  43         test "$untracked" = "all" && excl_opt=
  44         git ls-files -o -z $excl_opt
  45 }
  46
  47 clear_stash () {
  48         if test $# != 0
  49         then
  50                 die "$(gettext "git stash clear with parameters is unimplemented")"
  51         fi
  52         if current=$(git rev-parse --verify --quiet $ref_stash)
  53         then
  54                 git update-ref -d $ref_stash $current
  55         fi
  56 }
  57
  58 create_stash () {
  59         stash_msg="$1"
  60         untracked="$2"
  61
  62         git update-index -q --refresh
  63         if no_changes
  64         then
  65                 exit 0
  66         fi
  67
  68         # state of the base commit
  69         if b_commit=$(git rev-parse --verify HEAD)
  70         then
  71                 head=$(git rev-list --oneline -n 1 HEAD --)
  72         else
  73                 die "$(gettext "You do not have the initial commit yet")"
  74         fi
  75
  76         if branch=$(git symbolic-ref -q HEAD)
  77         then
  78                 branch=${branch#refs/heads/}
  79         else
  80                 branch='(no branch)'
  81         fi
  82         msg=$(printf '%s: %s' "$branch" "$head")
  83
  84         # state of the index
  85         i_tree=$(git write-tree) &&
  86         i_commit=$(printf 'index on %s\n' "$msg" |
  87                 git commit-tree $i_tree -p $b_commit) ||
  88                 die "$(gettext "Cannot save the current index state")"
  89
  90         if test -n "$untracked"
  91         then
  92                 # Untracked files are stored by themselves in a parentless commit, for
  93                 # ease of unpacking later.
  94                 u_commit=$(
  95                         untracked_files | (
  96                                 GIT_INDEX_FILE="$TMPindex" &&
  97                                 export GIT_INDEX_FILE &&
  98                                 rm -f "$TMPindex" &&
  99                                 git update-index -z --add --remove --stdin &&
 100                                 u_tree=$(git write-tree) &&
 101                                 printf 'untracked files on %s\n' "$msg" | git commit-tree $u_tree  &&
 102                                 rm -f "$TMPindex"
 103                 ) ) || die "Cannot save the untracked files"
 104
 105                 untracked_commit_option="-p $u_commit";
 106         else
 107                 untracked_commit_option=
 108         fi
 109
 110         if test -z "$patch_mode"
 111         then
 112
 113                 # state of the working tree
 114                 w_tree=$( (
 115                         git read-tree --index-output="$TMPindex" -m $i_tree &&
 116                         GIT_INDEX_FILE="$TMPindex" &&
 117                         export GIT_INDEX_FILE &&
 118                         git diff --name-only -z HEAD -- >"$TMP-stagenames" &&
 119                         git update-index -z --add --remove --stdin <"$TMP-stagenames" &&
 120                         git write-tree &&
 121                         rm -f "$TMPindex"
 122                 ) ) ||
 123                         die "$(gettext "Cannot save the current worktree state")"
 124
 125         else
 126
 127                 rm -f "$TMP-index" &&
 128                 GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
 129
 130                 # find out what the user wants
 131                 GIT_INDEX_FILE="$TMP-index" \
 132                         git add--interactive --patch=stash -- &&
 133
 134                 # state of the working tree
 135                 w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
 136                 die "$(gettext "Cannot save the current worktree state")"
 137
 138                 git diff-tree -p HEAD $w_tree -- >"$TMP-patch" &&
 139                 test -s "$TMP-patch" ||
 140                 die "$(gettext "No changes selected")"
 141
 142                 rm -f "$TMP-index" ||
 143                 die "$(gettext "Cannot remove temporary index (can't happen)")"
 144
 145         fi
 146
 147         # create the stash
 148         if test -z "$stash_msg"
 149         then
 150                 stash_msg=$(printf 'WIP on %s' "$msg")
 151         else
 152                 stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
 153         fi
 154         w_commit=$(printf '%s\n' "$stash_msg" |
 155         git commit-tree $w_tree -p $b_commit -p $i_commit $untracked_commit_option) ||
 156         die "$(gettext "Cannot record working tree state")"
 157 }
 158
 159 store_stash () {
 160         while test $# != 0
 161         do
 162                 case "$1" in
 163                 -m|--message)
 164                         shift
 165                         stash_msg="$1"
 166                         ;;
 167                 -q|--quiet)
 168                         quiet=t
 169                         ;;
 170                 *)
 171                         break
 172                         ;;
 173                 esac
 174                 shift
 175         done
 176         test $# = 1 ||
 177         die "$(eval_gettext "\"$dashless store\" requires one <commit> argument")"
 178
 179         w_commit="$1"
 180         if test -z "$stash_msg"
 181         then
 182                 stash_msg="Created via \"git stash store\"."
 183         fi
 184
 185         git update-ref --create-reflog -m "$stash_msg" $ref_stash $w_commit
 186         ret=$?
 187         test $ret != 0 && test -z "$quiet" &&
 188         die "$(eval_gettext "Cannot update \$ref_stash with \$w_commit")"
 189         return $ret
 190 }
 191
 192 save_stash () {
 193         keep_index=
 194         patch_mode=
 195         untracked=
 196         while test $# != 0
 197         do
 198                 case "$1" in
 199                 -k|--keep-index)
 200                         keep_index=t
 201                         ;;
 202                 --no-keep-index)
 203                         keep_index=n
 204                         ;;
 205                 -p|--patch)
 206                         patch_mode=t
 207                         # only default to keep if we don't already have an override
 208                         test -z "$keep_index" && keep_index=t
 209                         ;;
 210                 -q|--quiet)
 211                         GIT_QUIET=t
 212                         ;;
 213                 -u|--include-untracked)
 214                         untracked=untracked
 215                         ;;
 216                 -a|--all)
 217                         untracked=all
 218                         ;;
 219                 --help)
 220                         show_help
 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         git reflog exists $ref_stash ||
 263                 clear_stash || die "$(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         if test -z "$FLAGS"
 308         then
 309                 if test "$(git config --bool stash.showStat || echo true)" = "true"
 310                 then
 311                         FLAGS=--stat
 312                 fi
 313
 314                 if test "$(git config --bool stash.showPatch || echo false)" = "true"
 315                 then
 316                         FLAGS=${FLAGS}${FLAGS:+ }-p
 317                 fi
 318
 319                 if test -z "$FLAGS"
 320                 then
 321                         return 0
 322                 fi
 323         fi
 324
 325         git diff ${FLAGS} $b_commit $w_commit
 326 }
 327
 328 show_help () {
 329         exec git help stash
 330         exit 1
 331 }
 332
 333 #
 334 # Parses the remaining options looking for flags and
 335 # at most one revision defaulting to ${ref_stash}@{0}
 336 # if none found.
 337 #
 338 # Derives related tree and commit objects from the
 339 # revision, if one is found.
 340 #
 341 # stash records the work tree, and is a merge between the
 342 # base commit (first parent) and the index tree (second parent).
 343 #
 344 #   REV is set to the symbolic version of the specified stash-like commit
 345 #   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
 346 #   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
 347 #   s is set to the SHA1 of the stash commit
 348 #   w_commit is set to the commit containing the working tree
 349 #   b_commit is set to the base commit
 350 #   i_commit is set to the commit containing the index tree
 351 #   u_commit is set to the commit containing the untracked files tree
 352 #   w_tree is set to the working tree
 353 #   b_tree is set to the base tree
 354 #   i_tree is set to the index tree
 355 #   u_tree is set to the untracked files tree
 356 #
 357 #   GIT_QUIET is set to t if -q is specified
 358 #   INDEX_OPTION is set to --index if --index is specified.
 359 #   FLAGS is set to the remaining flags (if allowed)
 360 #
 361 # dies if:
 362 #   * too many revisions specified
 363 #   * no revision is specified and there is no stash stack
 364 #   * a revision is specified which cannot be resolve to a SHA1
 365 #   * a non-existent stash reference is specified
 366 #   * unknown flags were set and ALLOW_UNKNOWN_FLAGS is not "t"
 367 #
 368
 369 parse_flags_and_rev()
 370 {
 371         test "$PARSE_CACHE" = "$*" && return 0 # optimisation
 372         PARSE_CACHE="$*"
 373
 374         IS_STASH_LIKE=
 375         IS_STASH_REF=
 376         INDEX_OPTION=
 377         s=
 378         w_commit=
 379         b_commit=
 380         i_commit=
 381         u_commit=
 382         w_tree=
 383         b_tree=
 384         i_tree=
 385         u_tree=
 386
 387         REV=$(git rev-parse --no-flags --symbolic --sq "$@") || exit 1
 388
 389         FLAGS=
 390         for opt
 391         do
 392                 case "$opt" in
 393                         -q|--quiet)
 394                                 GIT_QUIET=-t
 395                         ;;
 396                         --index)
 397                                 INDEX_OPTION=--index
 398                         ;;
 399                         --help)
 400                                 show_help
 401                         ;;
 402                         -*)
 403                                 test "$ALLOW_UNKNOWN_FLAGS" = t ||
 404                                         die "$(eval_gettext "unknown option: \$opt")"
 405                                 FLAGS="${FLAGS}${FLAGS:+ }$opt"
 406                         ;;
 407                 esac
 408         done
 409
 410         eval set -- $REV
 411
 412         case $# in
 413                 0)
 414                         have_stash || die "$(gettext "No stash found.")"
 415                         set -- ${ref_stash}@{0}
 416                 ;;
 417                 1)
 418                         :
 419                 ;;
 420                 *)
 421                         die "$(eval_gettext "Too many revisions specified: \$REV")"
 422                 ;;
 423         esac
 424
 425         REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
 426                 reference="$1"
 427                 die "$(eval_gettext "\$reference is not a valid reference")"
 428         }
 429
 430         i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
 431         set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
 432         s=$1 &&
 433         w_commit=$1 &&
 434         b_commit=$2 &&
 435         w_tree=$3 &&
 436         b_tree=$4 &&
 437         i_tree=$5 &&
 438         IS_STASH_LIKE=t &&
 439         test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
 440         IS_STASH_REF=t
 441
 442         u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
 443         u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
 444 }
 445
 446 is_stash_like()
 447 {
 448         parse_flags_and_rev "$@"
 449         test -n "$IS_STASH_LIKE"
 450 }
 451
 452 assert_stash_like() {
 453         is_stash_like "$@" || {
 454                 args="$*"
 455                 die "$(eval_gettext "'\$args' is not a stash-like commit")"
 456         }
 457 }
 458
 459 is_stash_ref() {
 460         is_stash_like "$@" && test -n "$IS_STASH_REF"
 461 }
 462
 463 assert_stash_ref() {
 464         is_stash_ref "$@" || {
 465                 args="$*"
 466                 die "$(eval_gettext "'\$args' is not a stash reference")"
 467         }
 468 }
 469
 470 apply_stash () {
 471
 472         assert_stash_like "$@"
 473
 474         git update-index -q --refresh || die "$(gettext "unable to refresh index")"
 475
 476         # current index state
 477         c_tree=$(git write-tree) ||
 478                 die "$(gettext "Cannot apply a stash in the middle of a merge")"
 479
 480         unstashed_index_tree=
 481         if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
 482                         test "$c_tree" != "$i_tree"
 483         then
 484                 git diff-tree --binary $s^2^..$s^2 | git apply --cached
 485                 test $? -ne 0 &&
 486                         die "$(gettext "Conflicts in index. Try without --index.")"
 487                 unstashed_index_tree=$(git write-tree) ||
 488                         die "$(gettext "Could not save index tree")"
 489                 git reset
 490         fi
 491
 492         if test -n "$u_tree"
 493         then
 494                 GIT_INDEX_FILE="$TMPindex" git-read-tree "$u_tree" &&
 495                 GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
 496                 rm -f "$TMPindex" ||
 497                 die 'Could not restore untracked files from stash'
 498         fi
 499
 500         eval "
 501                 GITHEAD_$w_tree='Stashed changes' &&
 502                 GITHEAD_$c_tree='Updated upstream' &&
 503                 GITHEAD_$b_tree='Version stash was based on' &&
 504                 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
 505         "
 506
 507         if test -n "$GIT_QUIET"
 508         then
 509                 GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
 510         fi
 511         if git merge-recursive $b_tree -- $c_tree $w_tree
 512         then
 513                 # No conflict
 514                 if test -n "$unstashed_index_tree"
 515                 then
 516                         git read-tree "$unstashed_index_tree"
 517                 else
 518                         a="$TMP-added" &&
 519                         git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
 520                         git read-tree --reset $c_tree &&
 521                         git update-index --add --stdin <"$a" ||
 522                                 die "$(gettext "Cannot unstage modified files")"
 523                         rm -f "$a"
 524                 fi
 525                 squelch=
 526                 if test -n "$GIT_QUIET"
 527                 then
 528                         squelch='>/dev/null 2>&1'
 529                 fi
 530                 (cd "$START_DIR" && eval "git status $squelch") || :
 531         else
 532                 # Merge conflict; keep the exit status from merge-recursive
 533                 status=$?
 534                 git rerere
 535                 if test -n "$INDEX_OPTION"
 536                 then
 537                         gettextln "Index was not unstashed." >&2
 538                 fi
 539                 exit $status
 540         fi
 541 }
 542
 543 pop_stash() {
 544         assert_stash_ref "$@"
 545
 546         if apply_stash "$@"
 547         then
 548                 drop_stash "$@"
 549         else
 550                 status=$?
 551                 say "The stash is kept in case you need it again."
 552                 exit $status
 553         fi
 554 }
 555
 556 drop_stash () {
 557         assert_stash_ref "$@"
 558
 559         git reflog delete --updateref --rewrite "${REV}" &&
 560                 say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
 561                 die "$(eval_gettext "\${REV}: Could not drop stash entry")"
 562
 563         # clear_stash if we just dropped the last stash entry
 564         git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
 565         clear_stash
 566 }
 567
 568 apply_to_branch () {
 569         test -n "$1" || die "$(gettext "No branch name specified")"
 570         branch=$1
 571         shift 1
 572
 573         set -- --index "$@"
 574         assert_stash_like "$@"
 575
 576         git checkout -b $branch $REV^ &&
 577         apply_stash "$@" && {
 578                 test -z "$IS_STASH_REF" || drop_stash "$@"
 579         }
 580 }
 581
 582 PARSE_CACHE='--not-parsed'
 583 # The default command is "save" if nothing but options are given
 584 seen_non_option=
 585 for opt
 586 do
 587         case "$opt" in
 588         -*) ;;
 589         *) seen_non_option=t; break ;;
 590         esac
 591 done
 592
 593 test -n "$seen_non_option" || set "save" "$@"
 594
 595 # Main command set
 596 case "$1" in
 597 list)
 598         shift
 599         list_stash "$@"
 600         ;;
 601 show)
 602         shift
 603         show_stash "$@"
 604         ;;
 605 save)
 606         shift
 607         save_stash "$@"
 608         ;;
 609 apply)
 610         shift
 611         apply_stash "$@"
 612         ;;
 613 clear)
 614         shift
 615         clear_stash "$@"
 616         ;;
 617 create)
 618         shift
 619         create_stash "$*" && echo "$w_commit"
 620         ;;
 621 store)
 622         shift
 623         store_stash "$@"
 624         ;;
 625 drop)
 626         shift
 627         drop_stash "$@"
 628         ;;
 629 pop)
 630         shift
 631         pop_stash "$@"
 632         ;;
 633 branch)
 634         shift
 635         apply_to_branch "$@"
 636         ;;
 637 *)
 638         case $# in
 639         0)
 640                 save_stash &&
 641                 say "$(gettext "(To restore them type \"git stash apply\")")"
 642                 ;;
 643         *)
 644                 usage
 645         esac
 646         ;;
 647 esac