git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 SUBDIRECTORY_OK=Yes
   6 OPTIONS_KEEPDASHDASH=
   7 OPTIONS_SPEC="\
   8 git am [options] [<mbox>|<Maildir>...]
   9 git am [options] (--resolved | --skip | --abort)
  10 --
  11 i,interactive   run interactively
  12 b,binary*       (historical option -- no-op)
  13 3,3way          allow fall back on 3way merging if needed
  14 q,quiet         be quiet
  15 s,signoff       add a Signed-off-by line to the commit message
  16 u,utf8          recode into utf8 (default)
  17 k,keep          pass -k flag to git-mailinfo
  18 c,scissors      strip everything before a scissors line
  19 whitespace=     pass it through git-apply
  20 ignore-space-change pass it through git-apply
  21 ignore-whitespace pass it through git-apply
  22 directory=      pass it through git-apply
  23 C=              pass it through git-apply
  24 p=              pass it through git-apply
  25 patch-format=   format the patch(es) are in
  26 reject          pass it through git-apply
  27 resolvemsg=     override error message when patch failure occurs
  28 r,resolved      to be used after a patch failure
  29 skip            skip the current patch
  30 abort           restore the original branch and abort the patching operation.
  31 committer-date-is-author-date    lie about committer date
  32 ignore-date     use current timestamp for author date
  33 rerere-autoupdate update the index with reused conflict resolution if possible
  34 rebasing*       (internal use for git-rebase)"
  35
  36 . git-sh-setup
  37 prefix=$(git rev-parse --show-prefix)
  38 set_reflog_action am
  39 require_work_tree
  40 cd_to_toplevel
  41
  42 git var GIT_COMMITTER_IDENT >/dev/null ||
  43         die "You need to set your committer info first"
  44
  45 if git rev-parse --verify -q HEAD >/dev/null
  46 then
  47         HAS_HEAD=yes
  48 else
  49         HAS_HEAD=
  50 fi
  51
  52 sq () {
  53         git rev-parse --sq-quote "$@"
  54 }
  55
  56 stop_here () {
  57     echo "$1" >"$dotest/next"
  58     exit 1
  59 }
  60
  61 stop_here_user_resolve () {
  62     if [ -n "$resolvemsg" ]; then
  63             printf '%s\n' "$resolvemsg"
  64             stop_here $1
  65     fi
  66     cmdline="git am"
  67     if test '' != "$interactive"
  68     then
  69         cmdline="$cmdline -i"
  70     fi
  71     if test '' != "$threeway"
  72     then
  73         cmdline="$cmdline -3"
  74     fi
  75     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  76     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  77     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  78
  79     stop_here $1
  80 }
  81
  82 go_next () {
  83         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  84                 "$dotest/patch" "$dotest/info"
  85         echo "$next" >"$dotest/next"
  86         this=$next
  87 }
  88
  89 cannot_fallback () {
  90         echo "$1"
  91         echo "Cannot fall back to three-way merge."
  92         exit 1
  93 }
  94
  95 fall_back_3way () {
  96     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  97
  98     rm -fr "$dotest"/patch-merge-*
  99     mkdir "$dotest/patch-merge-tmp-dir"
 100
 101     # First see if the patch records the index info that we can use.
 102     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
 103         "$dotest/patch" &&
 104     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 105     git write-tree >"$dotest/patch-merge-base+" ||
 106     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 107
 108     say Using index info to reconstruct a base tree...
 109     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 110         git apply --cached <"$dotest/patch"
 111     then
 112         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 113         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
 114     else
 115         cannot_fallback "Did you hand edit your patch?
 116 It does not apply to blobs recorded in its index."
 117     fi
 118
 119     test -f "$dotest/patch-merge-index" &&
 120     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 121     orig_tree=$(cat "$dotest/patch-merge-base") &&
 122     rm -fr "$dotest"/patch-merge-* || exit 1
 123
 124     say Falling back to patching base and 3-way merge...
 125
 126     # This is not so wrong.  Depending on which base we picked,
 127     # orig_tree may be wildly different from ours, but his_tree
 128     # has the same set of wildly different changes in parts the
 129     # patch did not touch, so recursive ends up canceling them,
 130     # saying that we reverted all those changes.
 131
 132     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 133     export GITHEAD_$his_tree
 134     if test -n "$GIT_QUIET"
 135     then
 136             export GIT_MERGE_VERBOSITY=0
 137     fi
 138     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 139             git rerere $allow_rerere_autoupdate
 140             echo Failed to merge in the changes.
 141             exit 1
 142     }
 143     unset GITHEAD_$his_tree
 144 }
 145
 146 clean_abort () {
 147         test $# = 0 || echo >&2 "$@"
 148         rm -fr "$dotest"
 149         exit 1
 150 }
 151
 152 patch_format=
 153
 154 check_patch_format () {
 155         # early return if patch_format was set from the command line
 156         if test -n "$patch_format"
 157         then
 158                 return 0
 159         fi
 160
 161         # we default to mbox format if input is from stdin and for
 162         # directories
 163         if test $# = 0 || test "x$1" = "x-" || test -d "$1"
 164         then
 165                 patch_format=mbox
 166                 return 0
 167         fi
 168
 169         # otherwise, check the first few lines of the first patch to try
 170         # to detect its format
 171         {
 172                 read l1
 173                 read l2
 174                 read l3
 175                 case "$l1" in
 176                 "From "* | "From: "*)
 177                         patch_format=mbox
 178                         ;;
 179                 '# This series applies on GIT commit'*)
 180                         patch_format=stgit-series
 181                         ;;
 182                 "# HG changeset patch")
 183                         patch_format=hg
 184                         ;;
 185                 *)
 186                         # if the second line is empty and the third is
 187                         # a From, Author or Date entry, this is very
 188                         # likely an StGIT patch
 189                         case "$l2,$l3" in
 190                         ,"From: "* | ,"Author: "* | ,"Date: "*)
 191                                 patch_format=stgit
 192                                 ;;
 193                         *)
 194                                 ;;
 195                         esac
 196                         ;;
 197                 esac
 198                 if test -z "$patch_format" &&
 199                         test -n "$l1" &&
 200                         test -n "$l2" &&
 201                         test -n "$l3"
 202                 then
 203                         # This begins with three non-empty lines.  Is this a
 204                         # piece of e-mail a-la RFC2822?  Grab all the headers,
 205                         # discarding the indented remainder of folded lines,
 206                         # and see if it looks like that they all begin with the
 207                         # header field names...
 208                         sed -n -e '/^$/q' -e '/^[       ]/d' -e p "$1" |
 209                         sane_egrep -v '^[!-9;-~]+:' >/dev/null ||
 210                         patch_format=mbox
 211                 fi
 212         } < "$1" || clean_abort
 213 }
 214
 215 split_patches () {
 216         case "$patch_format" in
 217         mbox)
 218                 case "$rebasing" in
 219                 '')
 220                         keep_cr= ;;
 221                 ?*)
 222                         keep_cr=--keep-cr ;;
 223                 esac
 224                 git mailsplit -d"$prec" -o"$dotest" -b $keep_cr -- "$@" > "$dotest/last" ||
 225                 clean_abort
 226                 ;;
 227         stgit-series)
 228                 if test $# -ne 1
 229                 then
 230                         clean_abort "Only one StGIT patch series can be applied at once"
 231                 fi
 232                 series_dir=`dirname "$1"`
 233                 series_file="$1"
 234                 shift
 235                 {
 236                         set x
 237                         while read filename
 238                         do
 239                                 set "$@" "$series_dir/$filename"
 240                         done
 241                         # remove the safety x
 242                         shift
 243                         # remove the arg coming from the first-line comment
 244                         shift
 245                 } < "$series_file" || clean_abort
 246                 # set the patch format appropriately
 247                 patch_format=stgit
 248                 # now handle the actual StGIT patches
 249                 split_patches "$@"
 250                 ;;
 251         stgit)
 252                 this=0
 253                 for stgit in "$@"
 254                 do
 255                         this=`expr "$this" + 1`
 256                         msgnum=`printf "%0${prec}d" $this`
 257                         # Perl version of StGIT parse_patch. The first nonemptyline
 258                         # not starting with Author, From or Date is the
 259                         # subject, and the body starts with the next nonempty
 260                         # line not starting with Author, From or Date
 261                         perl -ne 'BEGIN { $subject = 0 }
 262                                 if ($subject > 1) { print ; }
 263                                 elsif (/^\s+$/) { next ; }
 264                                 elsif (/^Author:/) { print s/Author/From/ ; }
 265                                 elsif (/^(From|Date)/) { print ; }
 266                                 elsif ($subject) {
 267                                         $subject = 2 ;
 268                                         print "\n" ;
 269                                         print ;
 270                                 } else {
 271                                         print "Subject: ", $_ ;
 272                                         $subject = 1;
 273                                 }
 274                         ' < "$stgit" > "$dotest/$msgnum" || clean_abort
 275                 done
 276                 echo "$this" > "$dotest/last"
 277                 this=
 278                 msgnum=
 279                 ;;
 280         *)
 281                 if test -n "$parse_patch" ; then
 282                         clean_abort "Patch format $patch_format is not supported."
 283                 else
 284                         clean_abort "Patch format detection failed."
 285                 fi
 286                 ;;
 287         esac
 288 }
 289
 290 prec=4
 291 dotest="$GIT_DIR/rebase-apply"
 292 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
 293 resolvemsg= resume= scissors= no_inbody_headers=
 294 git_apply_opt=
 295 committer_date_is_author_date=
 296 ignore_date=
 297 allow_rerere_autoupdate=
 298
 299 while test $# != 0
 300 do
 301         case "$1" in
 302         -i|--interactive)
 303                 interactive=t ;;
 304         -b|--binary)
 305                 : ;;
 306         -3|--3way)
 307                 threeway=t ;;
 308         -s|--signoff)
 309                 sign=t ;;
 310         -u|--utf8)
 311                 utf8=t ;; # this is now default
 312         --no-utf8)
 313                 utf8= ;;
 314         -k|--keep)
 315                 keep=t ;;
 316         -c|--scissors)
 317                 scissors=t ;;
 318         --no-scissors)
 319                 scissors=f ;;
 320         -r|--resolved)
 321                 resolved=t ;;
 322         --skip)
 323                 skip=t ;;
 324         --abort)
 325                 abort=t ;;
 326         --rebasing)
 327                 rebasing=t threeway=t keep=t scissors=f no_inbody_headers=t ;;
 328         -d|--dotest)
 329                 die "-d option is no longer supported.  Do not use."
 330                 ;;
 331         --resolvemsg)
 332                 shift; resolvemsg=$1 ;;
 333         --whitespace|--directory)
 334                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 335         -C|-p)
 336                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 337         --patch-format)
 338                 shift ; patch_format="$1" ;;
 339         --reject|--ignore-whitespace|--ignore-space-change)
 340                 git_apply_opt="$git_apply_opt $1" ;;
 341         --committer-date-is-author-date)
 342                 committer_date_is_author_date=t ;;
 343         --ignore-date)
 344                 ignore_date=t ;;
 345         --rerere-autoupdate|--no-rerere-autoupdate)
 346                 allow_rerere_autoupdate="$1" ;;
 347         -q|--quiet)
 348                 GIT_QUIET=t ;;
 349         --)
 350                 shift; break ;;
 351         *)
 352                 usage ;;
 353         esac
 354         shift
 355 done
 356
 357 # If the dotest directory exists, but we have finished applying all the
 358 # patches in them, clear it out.
 359 if test -d "$dotest" &&
 360    last=$(cat "$dotest/last") &&
 361    next=$(cat "$dotest/next") &&
 362    test $# != 0 &&
 363    test "$next" -gt "$last"
 364 then
 365    rm -fr "$dotest"
 366 fi
 367
 368 if test -d "$dotest"
 369 then
 370         case "$#,$skip$resolved$abort" in
 371         0,*t*)
 372                 # Explicit resume command and we do not have file, so
 373                 # we are happy.
 374                 : ;;
 375         0,)
 376                 # No file input but without resume parameters; catch
 377                 # user error to feed us a patch from standard input
 378                 # when there is already $dotest.  This is somewhat
 379                 # unreliable -- stdin could be /dev/null for example
 380                 # and the caller did not intend to feed us a patch but
 381                 # wanted to continue unattended.
 382                 test -t 0
 383                 ;;
 384         *)
 385                 false
 386                 ;;
 387         esac ||
 388         die "previous rebase directory $dotest still exists but mbox given."
 389         resume=yes
 390
 391         case "$skip,$abort" in
 392         t,t)
 393                 die "Please make up your mind. --skip or --abort?"
 394                 ;;
 395         t,)
 396                 git rerere clear
 397                 git read-tree --reset -u HEAD HEAD
 398                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 399                 git reset HEAD
 400                 git update-ref ORIG_HEAD $orig_head
 401                 ;;
 402         ,t)
 403                 if test -f "$dotest/rebasing"
 404                 then
 405                         exec git rebase --abort
 406                 fi
 407                 git rerere clear
 408                 test -f "$dotest/dirtyindex" || {
 409                         git read-tree --reset -u HEAD ORIG_HEAD
 410                         git reset ORIG_HEAD
 411                 }
 412                 rm -fr "$dotest"
 413                 exit ;;
 414         esac
 415         rm -f "$dotest/dirtyindex"
 416 else
 417         # Make sure we are not given --skip, --resolved, nor --abort
 418         test "$skip$resolved$abort" = "" ||
 419                 die "Resolve operation not in progress, we are not resuming."
 420
 421         # Start afresh.
 422         mkdir -p "$dotest" || exit
 423
 424         if test -n "$prefix" && test $# != 0
 425         then
 426                 first=t
 427                 for arg
 428                 do
 429                         test -n "$first" && {
 430                                 set x
 431                                 first=
 432                         }
 433                         case "$arg" in
 434                         /*)
 435                                 set "$@" "$arg" ;;
 436                         *)
 437                                 set "$@" "$prefix$arg" ;;
 438                         esac
 439                 done
 440                 shift
 441         fi
 442
 443         check_patch_format "$@"
 444
 445         split_patches "$@"
 446
 447         # -i can and must be given when resuming; everything
 448         # else is kept
 449         echo " $git_apply_opt" >"$dotest/apply-opt"
 450         echo "$threeway" >"$dotest/threeway"
 451         echo "$sign" >"$dotest/sign"
 452         echo "$utf8" >"$dotest/utf8"
 453         echo "$keep" >"$dotest/keep"
 454         echo "$scissors" >"$dotest/scissors"
 455         echo "$no_inbody_headers" >"$dotest/no_inbody_headers"
 456         echo "$GIT_QUIET" >"$dotest/quiet"
 457         echo 1 >"$dotest/next"
 458         if test -n "$rebasing"
 459         then
 460                 : >"$dotest/rebasing"
 461         else
 462                 : >"$dotest/applying"
 463                 if test -n "$HAS_HEAD"
 464                 then
 465                         git update-ref ORIG_HEAD HEAD
 466                 else
 467                         git update-ref -d ORIG_HEAD >/dev/null 2>&1
 468                 fi
 469         fi
 470 fi
 471
 472 case "$resolved" in
 473 '')
 474         case "$HAS_HEAD" in
 475         '')
 476                 files=$(git ls-files) ;;
 477         ?*)
 478                 files=$(git diff-index --cached --name-only HEAD --) ;;
 479         esac || exit
 480         if test "$files"
 481         then
 482                 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
 483                 die "Dirty index: cannot apply patches (dirty: $files)"
 484         fi
 485 esac
 486
 487 if test "$(cat "$dotest/utf8")" = t
 488 then
 489         utf8=-u
 490 else
 491         utf8=-n
 492 fi
 493 if test "$(cat "$dotest/keep")" = t
 494 then
 495         keep=-k
 496 fi
 497 case "$(cat "$dotest/scissors")" in
 498 t)
 499         scissors=--scissors ;;
 500 f)
 501         scissors=--no-scissors ;;
 502 esac
 503 if test "$(cat "$dotest/no_inbody_headers")" = t
 504 then
 505         no_inbody_headers=--no-inbody-headers
 506 else
 507         no_inbody_headers=
 508 fi
 509 if test "$(cat "$dotest/quiet")" = t
 510 then
 511         GIT_QUIET=t
 512 fi
 513 if test "$(cat "$dotest/threeway")" = t
 514 then
 515         threeway=t
 516 fi
 517 git_apply_opt=$(cat "$dotest/apply-opt")
 518 if test "$(cat "$dotest/sign")" = t
 519 then
 520         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
 521                         s/>.*/>/
 522                         s/^/Signed-off-by: /'
 523                 `
 524 else
 525         SIGNOFF=
 526 fi
 527
 528 last=`cat "$dotest/last"`
 529 this=`cat "$dotest/next"`
 530 if test "$skip" = t
 531 then
 532         this=`expr "$this" + 1`
 533         resume=
 534 fi
 535
 536 if test "$this" -gt "$last"
 537 then
 538         say Nothing to do.
 539         rm -fr "$dotest"
 540         exit
 541 fi
 542
 543 while test "$this" -le "$last"
 544 do
 545         msgnum=`printf "%0${prec}d" $this`
 546         next=`expr "$this" + 1`
 547         test -f "$dotest/$msgnum" || {
 548                 resume=
 549                 go_next
 550                 continue
 551         }
 552
 553         # If we are not resuming, parse and extract the patch information
 554         # into separate files:
 555         #  - info records the authorship and title
 556         #  - msg is the rest of commit log message
 557         #  - patch is the patch body.
 558         #
 559         # When we are resuming, these files are either already prepared
 560         # by the user, or the user can tell us to do so by --resolved flag.
 561         case "$resume" in
 562         '')
 563                 git mailinfo $keep $no_inbody_headers $scissors $utf8 "$dotest/msg" "$dotest/patch" \
 564                         <"$dotest/$msgnum" >"$dotest/info" ||
 565                         stop_here $this
 566
 567                 # skip pine's internal folder data
 568                 sane_grep '^Author: Mail System Internal Data$' \
 569                         <"$dotest"/info >/dev/null &&
 570                         go_next && continue
 571
 572                 test -s "$dotest/patch" || {
 573                         echo "Patch is empty.  Was it split wrong?"
 574                         stop_here $this
 575                 }
 576                 if test -f "$dotest/rebasing" &&
 577                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 578                                 -e q "$dotest/$msgnum") &&
 579                         test "$(git cat-file -t "$commit")" = commit
 580                 then
 581                         git cat-file commit "$commit" |
 582                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 583                 else
 584                         {
 585                                 sed -n '/^Subject/ s/Subject: //p' "$dotest/info"
 586                                 echo
 587                                 cat "$dotest/msg"
 588                         } |
 589                         git stripspace > "$dotest/msg-clean"
 590                 fi
 591                 ;;
 592         esac
 593
 594         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 595         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 596         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 597
 598         if test -z "$GIT_AUTHOR_EMAIL"
 599         then
 600                 echo "Patch does not have a valid e-mail address."
 601                 stop_here $this
 602         fi
 603
 604         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 605
 606         case "$resume" in
 607         '')
 608             if test '' != "$SIGNOFF"
 609             then
 610                 LAST_SIGNED_OFF_BY=`
 611                     sed -ne '/^Signed-off-by: /p' \
 612                     "$dotest/msg-clean" |
 613                     sed -ne '$p'
 614                 `
 615                 ADD_SIGNOFF=`
 616                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 617                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 618                     echo "$SIGNOFF"
 619                 }`
 620             else
 621                 ADD_SIGNOFF=
 622             fi
 623             {
 624                 if test -s "$dotest/msg-clean"
 625                 then
 626                         cat "$dotest/msg-clean"
 627                 fi
 628                 if test '' != "$ADD_SIGNOFF"
 629                 then
 630                         echo "$ADD_SIGNOFF"
 631                 fi
 632             } >"$dotest/final-commit"
 633             ;;
 634         *)
 635                 case "$resolved$interactive" in
 636                 tt)
 637                         # This is used only for interactive view option.
 638                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 639                         ;;
 640                 esac
 641         esac
 642
 643         resume=
 644         if test "$interactive" = t
 645         then
 646             test -t 0 ||
 647             die "cannot be interactive without stdin connected to a terminal."
 648             action=again
 649             while test "$action" = again
 650             do
 651                 echo "Commit Body is:"
 652                 echo "--------------------------"
 653                 cat "$dotest/final-commit"
 654                 echo "--------------------------"
 655                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 656                 read reply
 657                 case "$reply" in
 658                 [yY]*) action=yes ;;
 659                 [aA]*) action=yes interactive= ;;
 660                 [nN]*) action=skip ;;
 661                 [eE]*) git_editor "$dotest/final-commit"
 662                        action=again ;;
 663                 [vV]*) action=again
 664                        : ${GIT_PAGER=$(git var GIT_PAGER)}
 665                        : ${LESS=-FRSX}
 666                        export LESS
 667                        $GIT_PAGER "$dotest/patch" ;;
 668                 *)     action=again ;;
 669                 esac
 670             done
 671         else
 672             action=yes
 673         fi
 674         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 675
 676         if test $action = skip
 677         then
 678                 go_next
 679                 continue
 680         fi
 681
 682         if test -x "$GIT_DIR"/hooks/applypatch-msg
 683         then
 684                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 685                 stop_here $this
 686         fi
 687
 688         say "Applying: $FIRSTLINE"
 689
 690         case "$resolved" in
 691         '')
 692                 # When we are allowed to fall back to 3-way later, don't give
 693                 # false errors during the initial attempt.
 694                 squelch=
 695                 if test "$threeway" = t
 696                 then
 697                         squelch='>/dev/null 2>&1 '
 698                 fi
 699                 eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
 700                 apply_status=$?
 701                 ;;
 702         t)
 703                 # Resolved means the user did all the hard work, and
 704                 # we do not have to do any patch application.  Just
 705                 # trust what the user has in the index file and the
 706                 # working tree.
 707                 resolved=
 708                 git diff-index --quiet --cached HEAD -- && {
 709                         echo "No changes - did you forget to use 'git add'?"
 710                         stop_here_user_resolve $this
 711                 }
 712                 unmerged=$(git ls-files -u)
 713                 if test -n "$unmerged"
 714                 then
 715                         echo "You still have unmerged paths in your index"
 716                         echo "did you forget to use 'git add'?"
 717                         stop_here_user_resolve $this
 718                 fi
 719                 apply_status=0
 720                 git rerere
 721                 ;;
 722         esac
 723
 724         if test $apply_status = 1 && test "$threeway" = t
 725         then
 726                 if (fall_back_3way)
 727                 then
 728                     # Applying the patch to an earlier tree and merging the
 729                     # result may have produced the same tree as ours.
 730                     git diff-index --quiet --cached HEAD -- && {
 731                         say No changes -- Patch already applied.
 732                         go_next
 733                         continue
 734                     }
 735                     # clear apply_status -- we have successfully merged.
 736                     apply_status=0
 737                 fi
 738         fi
 739         if test $apply_status != 0
 740         then
 741                 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
 742                 stop_here_user_resolve $this
 743         fi
 744
 745         if test -x "$GIT_DIR"/hooks/pre-applypatch
 746         then
 747                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 748         fi
 749
 750         tree=$(git write-tree) &&
 751         commit=$(
 752                 if test -n "$ignore_date"
 753                 then
 754                         GIT_AUTHOR_DATE=
 755                 fi
 756                 parent=$(git rev-parse --verify -q HEAD) ||
 757                 say >&2 "applying to an empty history"
 758
 759                 if test -n "$committer_date_is_author_date"
 760                 then
 761                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
 762                         export GIT_COMMITTER_DATE
 763                 fi &&
 764                 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
 765         ) &&
 766         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 767         stop_here $this
 768
 769         if test -x "$GIT_DIR"/hooks/post-applypatch
 770         then
 771                 "$GIT_DIR"/hooks/post-applypatch
 772         fi
 773
 774         go_next
 775 done
 776
 777 git gc --auto
 778
 779 rm -fr "$dotest"