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 $ref_stash 2>/dev/null)
  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                                 export GIT_INDEX_FILE="$TMPindex"
  98                                 rm -f "$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 save_stash () {
 160         keep_index=
 161         patch_mode=
 162         untracked=
 163         while test $# != 0
 164         do
 165                 case "$1" in
 166                 -k|--keep-index)
 167                         keep_index=t
 168                         ;;
 169                 --no-keep-index)
 170                         keep_index=n
 171                         ;;
 172                 -p|--patch)
 173                         patch_mode=t
 174                         # only default to keep if we don't already have an override
 175                         test -z "$keep_index" && keep_index=t
 176                         ;;
 177                 -q|--quiet)
 178                         GIT_QUIET=t
 179                         ;;
 180                 -u|--include-untracked)
 181                         untracked=untracked
 182                         ;;
 183                 -a|--all)
 184                         untracked=all
 185                         ;;
 186                 --)
 187                         shift
 188                         break
 189                         ;;
 190                 -*)
 191                         option="$1"
 192                         # TRANSLATORS: $option is an invalid option, like
 193                         # `--blah-blah'. The 7 spaces at the beginning of the
 194                         # second line correspond to "error: ". So you should line
 195                         # up the second line with however many characters the
 196                         # translation of "error: " takes in your language. E.g. in
 197                         # English this is:
 198                         #
 199                         #    $ git stash save --blah-blah 2>&1 | head -n 2
 200                         #    error: unknown option for 'stash save': --blah-blah
 201                         #           To provide a message, use git stash save -- '--blah-blah'
 202                         eval_gettextln "$("error: unknown option for 'stash save': \$option
 203        To provide a message, use git stash save -- '\$option'")"
 204                         usage
 205                         ;;
 206                 *)
 207                         break
 208                         ;;
 209                 esac
 210                 shift
 211         done
 212
 213         if test -n "$patch_mode" && test -n "$untracked"
 214         then
 215             die "Can't use --patch and --include-untracked or --all at the same time"
 216         fi
 217
 218         stash_msg="$*"
 219
 220         git update-index -q --refresh
 221         if no_changes
 222         then
 223                 say "$(gettext "No local changes to save")"
 224                 exit 0
 225         fi
 226         test -f "$GIT_DIR/logs/$ref_stash" ||
 227                 clear_stash || die "$(gettext "Cannot initialize stash")"
 228
 229         create_stash "$stash_msg" $untracked
 230
 231         # Make sure the reflog for stash is kept.
 232         : >>"$GIT_DIR/logs/$ref_stash"
 233
 234         git update-ref -m "$stash_msg" $ref_stash $w_commit ||
 235                 die "$(gettext "Cannot save the current status")"
 236         say Saved working directory and index state "$stash_msg"
 237
 238         if test -z "$patch_mode"
 239         then
 240                 git reset --hard ${GIT_QUIET:+-q}
 241                 test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
 242                 if test -n "$untracked"
 243                 then
 244                         git clean --force --quiet -d $CLEAN_X_OPTION
 245                 fi
 246
 247                 if test "$keep_index" = "t" && test -n $i_tree
 248                 then
 249                         git read-tree --reset -u $i_tree
 250                 fi
 251         else
 252                 git apply -R < "$TMP-patch" ||
 253                 die "$(gettext "Cannot remove worktree changes")"
 254
 255                 if test "$keep_index" != "t"
 256                 then
 257                         git reset
 258                 fi
 259         fi
 260 }
 261
 262 have_stash () {
 263         git rev-parse --verify $ref_stash >/dev/null 2>&1
 264 }
 265
 266 list_stash () {
 267         have_stash || return 0
 268         git log --format="%gd: %gs" -g "$@" $ref_stash --
 269 }
 270
 271 show_stash () {
 272         assert_stash_like "$@"
 273
 274         git diff ${FLAGS:---stat} $b_commit $w_commit
 275 }
 276
 277 #
 278 # Parses the remaining options looking for flags and
 279 # at most one revision defaulting to ${ref_stash}@{0}
 280 # if none found.
 281 #
 282 # Derives related tree and commit objects from the
 283 # revision, if one is found.
 284 #
 285 # stash records the work tree, and is a merge between the
 286 # base commit (first parent) and the index tree (second parent).
 287 #
 288 #   REV is set to the symbolic version of the specified stash-like commit
 289 #   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
 290 #   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
 291 #   s is set to the SHA1 of the stash commit
 292 #   w_commit is set to the commit containing the working tree
 293 #   b_commit is set to the base commit
 294 #   i_commit is set to the commit containing the index tree
 295 #   u_commit is set to the commit containing the untracked files tree
 296 #   w_tree is set to the working tree
 297 #   b_tree is set to the base tree
 298 #   i_tree is set to the index tree
 299 #   u_tree is set to the untracked files tree
 300 #
 301 #   GIT_QUIET is set to t if -q is specified
 302 #   INDEX_OPTION is set to --index if --index is specified.
 303 #   FLAGS is set to the remaining flags
 304 #
 305 # dies if:
 306 #   * too many revisions specified
 307 #   * no revision is specified and there is no stash stack
 308 #   * a revision is specified which cannot be resolve to a SHA1
 309 #   * a non-existent stash reference is specified
 310 #
 311
 312 parse_flags_and_rev()
 313 {
 314         test "$PARSE_CACHE" = "$*" && return 0 # optimisation
 315         PARSE_CACHE="$*"
 316
 317         IS_STASH_LIKE=
 318         IS_STASH_REF=
 319         INDEX_OPTION=
 320         s=
 321         w_commit=
 322         b_commit=
 323         i_commit=
 324         u_commit=
 325         w_tree=
 326         b_tree=
 327         i_tree=
 328         u_tree=
 329
 330         REV=$(git rev-parse --no-flags --symbolic "$@") || exit 1
 331
 332         FLAGS=
 333         for opt
 334         do
 335                 case "$opt" in
 336                         -q|--quiet)
 337                                 GIT_QUIET=-t
 338                         ;;
 339                         --index)
 340                                 INDEX_OPTION=--index
 341                         ;;
 342                         -*)
 343                                 FLAGS="${FLAGS}${FLAGS:+ }$opt"
 344                         ;;
 345                 esac
 346         done
 347
 348         set -- $REV
 349
 350         case $# in
 351                 0)
 352                         have_stash || die "$(gettext "No stash found.")"
 353                         set -- ${ref_stash}@{0}
 354                 ;;
 355                 1)
 356                         :
 357                 ;;
 358                 *)
 359                         die "$(eval_gettext "Too many revisions specified: \$REV")"
 360                 ;;
 361         esac
 362
 363         REV=$(git rev-parse --quiet --symbolic --verify $1 2>/dev/null) || {
 364                 reference="$1"
 365                 die "$(eval_gettext "\$reference is not valid reference")"
 366         }
 367
 368         i_commit=$(git rev-parse --quiet --verify $REV^2 2>/dev/null) &&
 369         set -- $(git rev-parse $REV $REV^1 $REV: $REV^1: $REV^2: 2>/dev/null) &&
 370         s=$1 &&
 371         w_commit=$1 &&
 372         b_commit=$2 &&
 373         w_tree=$3 &&
 374         b_tree=$4 &&
 375         i_tree=$5 &&
 376         IS_STASH_LIKE=t &&
 377         test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
 378         IS_STASH_REF=t
 379
 380         u_commit=$(git rev-parse --quiet --verify $REV^3 2>/dev/null) &&
 381         u_tree=$(git rev-parse $REV^3: 2>/dev/null)
 382 }
 383
 384 is_stash_like()
 385 {
 386         parse_flags_and_rev "$@"
 387         test -n "$IS_STASH_LIKE"
 388 }
 389
 390 assert_stash_like() {
 391         is_stash_like "$@" || {
 392                 args="$*"
 393                 die "$(eval_gettext "'\$args' is not a stash-like commit")"
 394         }
 395 }
 396
 397 is_stash_ref() {
 398         is_stash_like "$@" && test -n "$IS_STASH_REF"
 399 }
 400
 401 assert_stash_ref() {
 402         is_stash_ref "$@" || {
 403                 args="$*"
 404                 die "$(eval_gettext "'\$args' is not a stash reference")"
 405         }
 406 }
 407
 408 apply_stash () {
 409
 410         assert_stash_like "$@"
 411
 412         git update-index -q --refresh || die "$(gettext "unable to refresh index")"
 413
 414         # current index state
 415         c_tree=$(git write-tree) ||
 416                 die "$(gettext "Cannot apply a stash in the middle of a merge")"
 417
 418         unstashed_index_tree=
 419         if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
 420                         test "$c_tree" != "$i_tree"
 421         then
 422                 git diff-tree --binary $s^2^..$s^2 | git apply --cached
 423                 test $? -ne 0 &&
 424                         die "$(gettext "Conflicts in index. Try without --index.")"
 425                 unstashed_index_tree=$(git write-tree) ||
 426                         die "$(gettext "Could not save index tree")"
 427                 git reset
 428         fi
 429
 430         if test -n "$u_tree"
 431         then
 432                 GIT_INDEX_FILE="$TMPindex" git-read-tree "$u_tree" &&
 433                 GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
 434                 rm -f "$TMPindex" ||
 435                 die 'Could not restore untracked files from stash'
 436         fi
 437
 438         eval "
 439                 GITHEAD_$w_tree='Stashed changes' &&
 440                 GITHEAD_$c_tree='Updated upstream' &&
 441                 GITHEAD_$b_tree='Version stash was based on' &&
 442                 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
 443         "
 444
 445         if test -n "$GIT_QUIET"
 446         then
 447                 GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
 448         fi
 449         if git merge-recursive $b_tree -- $c_tree $w_tree
 450         then
 451                 # No conflict
 452                 if test -n "$unstashed_index_tree"
 453                 then
 454                         git read-tree "$unstashed_index_tree"
 455                 else
 456                         a="$TMP-added" &&
 457                         git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
 458                         git read-tree --reset $c_tree &&
 459                         git update-index --add --stdin <"$a" ||
 460                                 die "$(gettext "Cannot unstage modified files")"
 461                         rm -f "$a"
 462                 fi
 463                 squelch=
 464                 if test -n "$GIT_QUIET"
 465                 then
 466                         squelch='>/dev/null 2>&1'
 467                 fi
 468                 (cd "$START_DIR" && eval "git status $squelch") || :
 469         else
 470                 # Merge conflict; keep the exit status from merge-recursive
 471                 status=$?
 472                 if test -n "$INDEX_OPTION"
 473                 then
 474                         gettextln "Index was not unstashed." >&2
 475                 fi
 476                 exit $status
 477         fi
 478 }
 479
 480 pop_stash() {
 481         assert_stash_ref "$@"
 482
 483         apply_stash "$@" &&
 484         drop_stash "$@"
 485 }
 486
 487 drop_stash () {
 488         assert_stash_ref "$@"
 489
 490         git reflog delete --updateref --rewrite "${REV}" &&
 491                 say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
 492                 die "$(eval_gettext "\${REV}: Could not drop stash entry")"
 493
 494         # clear_stash if we just dropped the last stash entry
 495         git rev-parse --verify "$ref_stash@{0}" >/dev/null 2>&1 || clear_stash
 496 }
 497
 498 apply_to_branch () {
 499         test -n "$1" || die "$(gettext "No branch name specified")"
 500         branch=$1
 501         shift 1
 502
 503         set -- --index "$@"
 504         assert_stash_like "$@"
 505
 506         git checkout -b $branch $REV^ &&
 507         apply_stash "$@" && {
 508                 test -z "$IS_STASH_REF" || drop_stash "$@"
 509         }
 510 }
 511
 512 PARSE_CACHE='--not-parsed'
 513 # The default command is "save" if nothing but options are given
 514 seen_non_option=
 515 for opt
 516 do
 517         case "$opt" in
 518         -*) ;;
 519         *) seen_non_option=t; break ;;
 520         esac
 521 done
 522
 523 test -n "$seen_non_option" || set "save" "$@"
 524
 525 # Main command set
 526 case "$1" in
 527 list)
 528         shift
 529         list_stash "$@"
 530         ;;
 531 show)
 532         shift
 533         show_stash "$@"
 534         ;;
 535 save)
 536         shift
 537         save_stash "$@"
 538         ;;
 539 apply)
 540         shift
 541         apply_stash "$@"
 542         ;;
 543 clear)
 544         shift
 545         clear_stash "$@"
 546         ;;
 547 create)
 548         if test $# -gt 0 && test "$1" = create
 549         then
 550                 shift
 551         fi
 552         create_stash "$*" && echo "$w_commit"
 553         ;;
 554 drop)
 555         shift
 556         drop_stash "$@"
 557         ;;
 558 pop)
 559         shift
 560         pop_stash "$@"
 561         ;;
 562 branch)
 563         shift
 564         apply_to_branch "$@"
 565         ;;
 566 *)
 567         case $# in
 568         0)
 569                 save_stash &&
 570                 say "$(gettext "(To restore them type \"git stash apply\")")"
 571                 ;;
 572         *)
 573                 usage
 574         esac
 575         ;;
 576 esac