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 keep-cr         pass --keep-cr flag to git-mailsplit for mbox format
  19 no-keep-cr      do not pass --keep-cr flag to git-mailsplit independent of am.keepcr
  20 c,scissors      strip everything before a scissors line
  21 whitespace=     pass it through git-apply
  22 ignore-space-change pass it through git-apply
  23 ignore-whitespace pass it through git-apply
  24 directory=      pass it through git-apply
  25 C=              pass it through git-apply
  26 p=              pass it through git-apply
  27 patch-format=   format the patch(es) are in
  28 reject          pass it through git-apply
  29 resolvemsg=     override error message when patch failure occurs
  30 continue        continue applying patches after resolving a conflict
  31 r,resolved      synonyms for --continue
  32 skip            skip the current patch
  33 abort           restore the original branch and abort the patching operation.
  34 committer-date-is-author-date    lie about committer date
  35 ignore-date     use current timestamp for author date
  36 rerere-autoupdate update the index with reused conflict resolution if possible
  37 rebasing*       (internal use for git-rebase)"
  38
  39 . git-sh-setup
  40 prefix=$(git rev-parse --show-prefix)
  41 set_reflog_action am
  42 require_work_tree
  43 cd_to_toplevel
  44
  45 git var GIT_COMMITTER_IDENT >/dev/null ||
  46         die "You need to set your committer info first"
  47
  48 if git rev-parse --verify -q HEAD >/dev/null
  49 then
  50         HAS_HEAD=yes
  51 else
  52         HAS_HEAD=
  53 fi
  54
  55 cmdline="git am"
  56 if test '' != "$interactive"
  57 then
  58         cmdline="$cmdline -i"
  59 fi
  60 if test '' != "$threeway"
  61 then
  62         cmdline="$cmdline -3"
  63 fi
  64
  65 sq () {
  66         git rev-parse --sq-quote "$@"
  67 }
  68
  69 stop_here () {
  70     echo "$1" >"$dotest/next"
  71     exit 1
  72 }
  73
  74 stop_here_user_resolve () {
  75     if [ -n "$resolvemsg" ]; then
  76             printf '%s\n' "$resolvemsg"
  77             stop_here $1
  78     fi
  79     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  80     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  81     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  82
  83     stop_here $1
  84 }
  85
  86 go_next () {
  87         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  88                 "$dotest/patch" "$dotest/info"
  89         echo "$next" >"$dotest/next"
  90         this=$next
  91 }
  92
  93 cannot_fallback () {
  94         echo "$1"
  95         echo "Cannot fall back to three-way merge."
  96         exit 1
  97 }
  98
  99 fall_back_3way () {
 100     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
 101
 102     rm -fr "$dotest"/patch-merge-*
 103     mkdir "$dotest/patch-merge-tmp-dir"
 104
 105     # First see if the patch records the index info that we can use.
 106     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
 107         "$dotest/patch" &&
 108     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 109     git write-tree >"$dotest/patch-merge-base+" ||
 110     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 111
 112     say Using index info to reconstruct a base tree...
 113     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 114         git apply --cached <"$dotest/patch"
 115     then
 116         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 117         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
 118     else
 119         cannot_fallback "Did you hand edit your patch?
 120 It does not apply to blobs recorded in its index."
 121     fi
 122
 123     test -f "$dotest/patch-merge-index" &&
 124     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 125     orig_tree=$(cat "$dotest/patch-merge-base") &&
 126     rm -fr "$dotest"/patch-merge-* || exit 1
 127
 128     say Falling back to patching base and 3-way merge...
 129
 130     # This is not so wrong.  Depending on which base we picked,
 131     # orig_tree may be wildly different from ours, but his_tree
 132     # has the same set of wildly different changes in parts the
 133     # patch did not touch, so recursive ends up canceling them,
 134     # saying that we reverted all those changes.
 135
 136     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 137     export GITHEAD_$his_tree
 138     if test -n "$GIT_QUIET"
 139     then
 140             export GIT_MERGE_VERBOSITY=0
 141     fi
 142     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 143             git rerere $allow_rerere_autoupdate
 144             echo Failed to merge in the changes.
 145             exit 1
 146     }
 147     unset GITHEAD_$his_tree
 148 }
 149
 150 clean_abort () {
 151         test $# = 0 || echo >&2 "$@"
 152         rm -fr "$dotest"
 153         exit 1
 154 }
 155
 156 patch_format=
 157
 158 check_patch_format () {
 159         # early return if patch_format was set from the command line
 160         if test -n "$patch_format"
 161         then
 162                 return 0
 163         fi
 164
 165         # we default to mbox format if input is from stdin and for
 166         # directories
 167         if test $# = 0 || test "x$1" = "x-" || test -d "$1"
 168         then
 169                 patch_format=mbox
 170                 return 0
 171         fi
 172
 173         # otherwise, check the first few lines of the first patch to try
 174         # to detect its format
 175         {
 176                 read l1
 177                 read l2
 178                 read l3
 179                 case "$l1" in
 180                 "From "* | "From: "*)
 181                         patch_format=mbox
 182                         ;;
 183                 '# This series applies on GIT commit'*)
 184                         patch_format=stgit-series
 185                         ;;
 186                 "# HG changeset patch")
 187                         patch_format=hg
 188                         ;;
 189                 *)
 190                         # if the second line is empty and the third is
 191                         # a From, Author or Date entry, this is very
 192                         # likely an StGIT patch
 193                         case "$l2,$l3" in
 194                         ,"From: "* | ,"Author: "* | ,"Date: "*)
 195                                 patch_format=stgit
 196                                 ;;
 197                         *)
 198                                 ;;
 199                         esac
 200                         ;;
 201                 esac
 202                 if test -z "$patch_format" &&
 203                         test -n "$l1" &&
 204                         test -n "$l2" &&
 205                         test -n "$l3"
 206                 then
 207                         # This begins with three non-empty lines.  Is this a
 208                         # piece of e-mail a-la RFC2822?  Grab all the headers,
 209                         # discarding the indented remainder of folded lines,
 210                         # and see if it looks like that they all begin with the
 211                         # header field names...
 212                         tr -d '\015' <"$1" |
 213                         sed -n -e '/^$/q' -e '/^[       ]/d' -e p |
 214                         sane_egrep -v '^[!-9;-~]+:' >/dev/null ||
 215                         patch_format=mbox
 216                 fi
 217         } < "$1" || clean_abort
 218 }
 219
 220 split_patches () {
 221         case "$patch_format" in
 222         mbox)
 223                 if test -n "$rebasing" || test t = "$keepcr"
 224                 then
 225                     keep_cr=--keep-cr
 226                 else
 227                     keep_cr=
 228                 fi
 229                 git mailsplit -d"$prec" -o"$dotest" -b $keep_cr -- "$@" > "$dotest/last" ||
 230                 clean_abort
 231                 ;;
 232         stgit-series)
 233                 if test $# -ne 1
 234                 then
 235                         clean_abort "Only one StGIT patch series can be applied at once"
 236                 fi
 237                 series_dir=`dirname "$1"`
 238                 series_file="$1"
 239                 shift
 240                 {
 241                         set x
 242                         while read filename
 243                         do
 244                                 set "$@" "$series_dir/$filename"
 245                         done
 246                         # remove the safety x
 247                         shift
 248                         # remove the arg coming from the first-line comment
 249                         shift
 250                 } < "$series_file" || clean_abort
 251                 # set the patch format appropriately
 252                 patch_format=stgit
 253                 # now handle the actual StGIT patches
 254                 split_patches "$@"
 255                 ;;
 256         stgit)
 257                 this=0
 258                 for stgit in "$@"
 259                 do
 260                         this=`expr "$this" + 1`
 261                         msgnum=`printf "%0${prec}d" $this`
 262                         # Perl version of StGIT parse_patch. The first nonemptyline
 263                         # not starting with Author, From or Date is the
 264                         # subject, and the body starts with the next nonempty
 265                         # line not starting with Author, From or Date
 266                         perl -ne 'BEGIN { $subject = 0 }
 267                                 if ($subject > 1) { print ; }
 268                                 elsif (/^\s+$/) { next ; }
 269                                 elsif (/^Author:/) { print s/Author/From/ ; }
 270                                 elsif (/^(From|Date)/) { print ; }
 271                                 elsif ($subject) {
 272                                         $subject = 2 ;
 273                                         print "\n" ;
 274                                         print ;
 275                                 } else {
 276                                         print "Subject: ", $_ ;
 277                                         $subject = 1;
 278                                 }
 279                         ' < "$stgit" > "$dotest/$msgnum" || clean_abort
 280                 done
 281                 echo "$this" > "$dotest/last"
 282                 this=
 283                 msgnum=
 284                 ;;
 285         *)
 286                 if test -n "$parse_patch" ; then
 287                         clean_abort "Patch format $patch_format is not supported."
 288                 else
 289                         clean_abort "Patch format detection failed."
 290                 fi
 291                 ;;
 292         esac
 293 }
 294
 295 prec=4
 296 dotest="$GIT_DIR/rebase-apply"
 297 sign= utf8=t keep= keepcr= skip= interactive= resolved= rebasing= abort=
 298 resolvemsg= resume= scissors= no_inbody_headers=
 299 git_apply_opt=
 300 committer_date_is_author_date=
 301 ignore_date=
 302 allow_rerere_autoupdate=
 303
 304 if test "$(git config --bool --get am.keepcr)" = true
 305 then
 306     keepcr=t
 307 fi
 308
 309 while test $# != 0
 310 do
 311         case "$1" in
 312         -i|--interactive)
 313                 interactive=t ;;
 314         -b|--binary)
 315                 : ;;
 316         -3|--3way)
 317                 threeway=t ;;
 318         -s|--signoff)
 319                 sign=t ;;
 320         -u|--utf8)
 321                 utf8=t ;; # this is now default
 322         --no-utf8)
 323                 utf8= ;;
 324         -k|--keep)
 325                 keep=t ;;
 326         -c|--scissors)
 327                 scissors=t ;;
 328         --no-scissors)
 329                 scissors=f ;;
 330         -r|--resolved|--continue)
 331                 resolved=t ;;
 332         --skip)
 333                 skip=t ;;
 334         --abort)
 335                 abort=t ;;
 336         --rebasing)
 337                 rebasing=t threeway=t keep=t scissors=f no_inbody_headers=t ;;
 338         -d|--dotest)
 339                 die "-d option is no longer supported.  Do not use."
 340                 ;;
 341         --resolvemsg)
 342                 shift; resolvemsg=$1 ;;
 343         --whitespace|--directory)
 344                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 345         -C|-p)
 346                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 347         --patch-format)
 348                 shift ; patch_format="$1" ;;
 349         --reject|--ignore-whitespace|--ignore-space-change)
 350                 git_apply_opt="$git_apply_opt $1" ;;
 351         --committer-date-is-author-date)
 352                 committer_date_is_author_date=t ;;
 353         --ignore-date)
 354                 ignore_date=t ;;
 355         --rerere-autoupdate|--no-rerere-autoupdate)
 356                 allow_rerere_autoupdate="$1" ;;
 357         -q|--quiet)
 358                 GIT_QUIET=t ;;
 359         --keep-cr)
 360                 keepcr=t ;;
 361         --no-keep-cr)
 362                 keepcr=f ;;
 363         --)
 364                 shift; break ;;
 365         *)
 366                 usage ;;
 367         esac
 368         shift
 369 done
 370
 371 # If the dotest directory exists, but we have finished applying all the
 372 # patches in them, clear it out.
 373 if test -d "$dotest" &&
 374    last=$(cat "$dotest/last") &&
 375    next=$(cat "$dotest/next") &&
 376    test $# != 0 &&
 377    test "$next" -gt "$last"
 378 then
 379    rm -fr "$dotest"
 380 fi
 381
 382 if test -d "$dotest"
 383 then
 384         case "$#,$skip$resolved$abort" in
 385         0,*t*)
 386                 # Explicit resume command and we do not have file, so
 387                 # we are happy.
 388                 : ;;
 389         0,)
 390                 # No file input but without resume parameters; catch
 391                 # user error to feed us a patch from standard input
 392                 # when there is already $dotest.  This is somewhat
 393                 # unreliable -- stdin could be /dev/null for example
 394                 # and the caller did not intend to feed us a patch but
 395                 # wanted to continue unattended.
 396                 test -t 0
 397                 ;;
 398         *)
 399                 false
 400                 ;;
 401         esac ||
 402         die "previous rebase directory $dotest still exists but mbox given."
 403         resume=yes
 404
 405         case "$skip,$abort" in
 406         t,t)
 407                 die "Please make up your mind. --skip or --abort?"
 408                 ;;
 409         t,)
 410                 git rerere clear
 411                 git read-tree --reset -u HEAD HEAD
 412                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 413                 git reset HEAD
 414                 git update-ref ORIG_HEAD $orig_head
 415                 ;;
 416         ,t)
 417                 if test -f "$dotest/rebasing"
 418                 then
 419                         exec git rebase --abort
 420                 fi
 421                 git rerere clear
 422                 test -f "$dotest/dirtyindex" || {
 423                         git read-tree --reset -u HEAD ORIG_HEAD
 424                         git reset ORIG_HEAD
 425                 }
 426                 rm -fr "$dotest"
 427                 exit ;;
 428         esac
 429         rm -f "$dotest/dirtyindex"
 430 else
 431         # Make sure we are not given --skip, --resolved, nor --abort
 432         test "$skip$resolved$abort" = "" ||
 433                 die "Resolve operation not in progress, we are not resuming."
 434
 435         # Start afresh.
 436         mkdir -p "$dotest" || exit
 437
 438         if test -n "$prefix" && test $# != 0
 439         then
 440                 first=t
 441                 for arg
 442                 do
 443                         test -n "$first" && {
 444                                 set x
 445                                 first=
 446                         }
 447                         case "$arg" in
 448                         /*|?:*)
 449                                 set "$@" "$arg" ;;
 450                         *)
 451                                 set "$@" "$prefix$arg" ;;
 452                         esac
 453                 done
 454                 shift
 455         fi
 456
 457         check_patch_format "$@"
 458
 459         split_patches "$@"
 460
 461         # -i can and must be given when resuming; everything
 462         # else is kept
 463         echo " $git_apply_opt" >"$dotest/apply-opt"
 464         echo "$threeway" >"$dotest/threeway"
 465         echo "$sign" >"$dotest/sign"
 466         echo "$utf8" >"$dotest/utf8"
 467         echo "$keep" >"$dotest/keep"
 468         echo "$keepcr" >"$dotest/keepcr"
 469         echo "$scissors" >"$dotest/scissors"
 470         echo "$no_inbody_headers" >"$dotest/no_inbody_headers"
 471         echo "$GIT_QUIET" >"$dotest/quiet"
 472         echo 1 >"$dotest/next"
 473         if test -n "$rebasing"
 474         then
 475                 : >"$dotest/rebasing"
 476         else
 477                 : >"$dotest/applying"
 478                 if test -n "$HAS_HEAD"
 479                 then
 480                         git update-ref ORIG_HEAD HEAD
 481                 else
 482                         git update-ref -d ORIG_HEAD >/dev/null 2>&1
 483                 fi
 484         fi
 485 fi
 486
 487 case "$resolved" in
 488 '')
 489         case "$HAS_HEAD" in
 490         '')
 491                 files=$(git ls-files) ;;
 492         ?*)
 493                 files=$(git diff-index --ignore-submodules --cached \
 494                         --name-only HEAD --) ;;
 495         esac || exit
 496         if test "$files"
 497         then
 498                 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
 499                 die "Dirty index: cannot apply patches (dirty: $files)"
 500         fi
 501 esac
 502
 503 if test "$(cat "$dotest/utf8")" = t
 504 then
 505         utf8=-u
 506 else
 507         utf8=-n
 508 fi
 509 if test "$(cat "$dotest/keep")" = t
 510 then
 511         keep=-k
 512 fi
 513 case "$(cat "$dotest/keepcr")" in
 514 t)
 515         keepcr=--keep-cr ;;
 516 f)
 517         keepcr=--no-keep-cr ;;
 518 esac
 519 case "$(cat "$dotest/scissors")" in
 520 t)
 521         scissors=--scissors ;;
 522 f)
 523         scissors=--no-scissors ;;
 524 esac
 525 if test "$(cat "$dotest/no_inbody_headers")" = t
 526 then
 527         no_inbody_headers=--no-inbody-headers
 528 else
 529         no_inbody_headers=
 530 fi
 531 if test "$(cat "$dotest/quiet")" = t
 532 then
 533         GIT_QUIET=t
 534 fi
 535 if test "$(cat "$dotest/threeway")" = t
 536 then
 537         threeway=t
 538 fi
 539 git_apply_opt=$(cat "$dotest/apply-opt")
 540 if test "$(cat "$dotest/sign")" = t
 541 then
 542         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
 543                         s/>.*/>/
 544                         s/^/Signed-off-by: /'
 545                 `
 546 else
 547         SIGNOFF=
 548 fi
 549
 550 last=`cat "$dotest/last"`
 551 this=`cat "$dotest/next"`
 552 if test "$skip" = t
 553 then
 554         this=`expr "$this" + 1`
 555         resume=
 556 fi
 557
 558 if test "$this" -gt "$last"
 559 then
 560         say Nothing to do.
 561         rm -fr "$dotest"
 562         exit
 563 fi
 564
 565 while test "$this" -le "$last"
 566 do
 567         msgnum=`printf "%0${prec}d" $this`
 568         next=`expr "$this" + 1`
 569         test -f "$dotest/$msgnum" || {
 570                 resume=
 571                 go_next
 572                 continue
 573         }
 574
 575         # If we are not resuming, parse and extract the patch information
 576         # into separate files:
 577         #  - info records the authorship and title
 578         #  - msg is the rest of commit log message
 579         #  - patch is the patch body.
 580         #
 581         # When we are resuming, these files are either already prepared
 582         # by the user, or the user can tell us to do so by --resolved flag.
 583         case "$resume" in
 584         '')
 585                 git mailinfo $keep $no_inbody_headers $scissors $utf8 "$dotest/msg" "$dotest/patch" \
 586                         <"$dotest/$msgnum" >"$dotest/info" ||
 587                         stop_here $this
 588
 589                 # skip pine's internal folder data
 590                 sane_grep '^Author: Mail System Internal Data$' \
 591                         <"$dotest"/info >/dev/null &&
 592                         go_next && continue
 593
 594                 test -s "$dotest/patch" || {
 595                         echo "Patch is empty.  Was it split wrong?"
 596                         echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
 597                         echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
 598                         stop_here $this
 599                 }
 600                 rm -f "$dotest/original-commit"
 601                 if test -f "$dotest/rebasing" &&
 602                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 603                                 -e q "$dotest/$msgnum") &&
 604                         test "$(git cat-file -t "$commit")" = commit
 605                 then
 606                         git cat-file commit "$commit" |
 607                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 608                         echo "$commit" > "$dotest/original-commit"
 609                 else
 610                         {
 611                                 sed -n '/^Subject/ s/Subject: //p' "$dotest/info"
 612                                 echo
 613                                 cat "$dotest/msg"
 614                         } |
 615                         git stripspace > "$dotest/msg-clean"
 616                 fi
 617                 ;;
 618         esac
 619
 620         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 621         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 622         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 623
 624         if test -z "$GIT_AUTHOR_EMAIL"
 625         then
 626                 echo "Patch does not have a valid e-mail address."
 627                 stop_here $this
 628         fi
 629
 630         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 631
 632         case "$resume" in
 633         '')
 634             if test '' != "$SIGNOFF"
 635             then
 636                 LAST_SIGNED_OFF_BY=`
 637                     sed -ne '/^Signed-off-by: /p' \
 638                     "$dotest/msg-clean" |
 639                     sed -ne '$p'
 640                 `
 641                 ADD_SIGNOFF=`
 642                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 643                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 644                     echo "$SIGNOFF"
 645                 }`
 646             else
 647                 ADD_SIGNOFF=
 648             fi
 649             {
 650                 if test -s "$dotest/msg-clean"
 651                 then
 652                         cat "$dotest/msg-clean"
 653                 fi
 654                 if test '' != "$ADD_SIGNOFF"
 655                 then
 656                         echo "$ADD_SIGNOFF"
 657                 fi
 658             } >"$dotest/final-commit"
 659             ;;
 660         *)
 661                 case "$resolved$interactive" in
 662                 tt)
 663                         # This is used only for interactive view option.
 664                         git diff-index --ignore-submodules -p --cached \
 665                                 HEAD -- >"$dotest/patch"
 666                         ;;
 667                 esac
 668         esac
 669
 670         resume=
 671         if test "$interactive" = t
 672         then
 673             test -t 0 ||
 674             die "cannot be interactive without stdin connected to a terminal."
 675             action=again
 676             while test "$action" = again
 677             do
 678                 echo "Commit Body is:"
 679                 echo "--------------------------"
 680                 cat "$dotest/final-commit"
 681                 echo "--------------------------"
 682                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 683                 read reply
 684                 case "$reply" in
 685                 [yY]*) action=yes ;;
 686                 [aA]*) action=yes interactive= ;;
 687                 [nN]*) action=skip ;;
 688                 [eE]*) git_editor "$dotest/final-commit"
 689                        action=again ;;
 690                 [vV]*) action=again
 691                        git_pager "$dotest/patch" ;;
 692                 *)     action=again ;;
 693                 esac
 694             done
 695         else
 696             action=yes
 697         fi
 698
 699         if test -f "$dotest/final-commit"
 700         then
 701                 FIRSTLINE=$(sed 1q "$dotest/final-commit")
 702         else
 703                 FIRSTLINE=""
 704         fi
 705
 706         if test $action = skip
 707         then
 708                 go_next
 709                 continue
 710         fi
 711
 712         if test -x "$GIT_DIR"/hooks/applypatch-msg
 713         then
 714                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 715                 stop_here $this
 716         fi
 717
 718         say "Applying: $FIRSTLINE"
 719
 720         case "$resolved" in
 721         '')
 722                 # When we are allowed to fall back to 3-way later, don't give
 723                 # false errors during the initial attempt.
 724                 squelch=
 725                 if test "$threeway" = t
 726                 then
 727                         squelch='>/dev/null 2>&1 '
 728                 fi
 729                 eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
 730                 apply_status=$?
 731                 ;;
 732         t)
 733                 # Resolved means the user did all the hard work, and
 734                 # we do not have to do any patch application.  Just
 735                 # trust what the user has in the index file and the
 736                 # working tree.
 737                 resolved=
 738                 git diff-index --ignore-submodules --quiet --cached HEAD -- && {
 739                         echo "No changes - did you forget to use 'git add'?"
 740                         echo "If there is nothing left to stage, chances are that something else"
 741                         echo "already introduced the same changes; you might want to skip this patch."
 742                         stop_here_user_resolve $this
 743                 }
 744                 unmerged=$(git ls-files -u)
 745                 if test -n "$unmerged"
 746                 then
 747                         echo "You still have unmerged paths in your index"
 748                         echo "did you forget to use 'git add'?"
 749                         stop_here_user_resolve $this
 750                 fi
 751                 apply_status=0
 752                 git rerere
 753                 ;;
 754         esac
 755
 756         if test $apply_status != 0 && test "$threeway" = t
 757         then
 758                 if (fall_back_3way)
 759                 then
 760                     # Applying the patch to an earlier tree and merging the
 761                     # result may have produced the same tree as ours.
 762                     git diff-index --ignore-submodules --quiet --cached \
 763                                 HEAD -- && {
 764                         say No changes -- Patch already applied.
 765                         go_next
 766                         continue
 767                     }
 768                     # clear apply_status -- we have successfully merged.
 769                     apply_status=0
 770                 fi
 771         fi
 772         if test $apply_status != 0
 773         then
 774                 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
 775                 stop_here_user_resolve $this
 776         fi
 777
 778         if test -x "$GIT_DIR"/hooks/pre-applypatch
 779         then
 780                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 781         fi
 782
 783         tree=$(git write-tree) &&
 784         commit=$(
 785                 if test -n "$ignore_date"
 786                 then
 787                         GIT_AUTHOR_DATE=
 788                 fi
 789                 parent=$(git rev-parse --verify -q HEAD) ||
 790                 say >&2 "applying to an empty history"
 791
 792                 if test -n "$committer_date_is_author_date"
 793                 then
 794                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
 795                         export GIT_COMMITTER_DATE
 796                 fi &&
 797                 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
 798         ) &&
 799         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 800         stop_here $this
 801
 802         if test -f "$dotest/original-commit"; then
 803                 echo "$(cat "$dotest/original-commit") $commit" >> "$dotest/rewritten"
 804         fi
 805
 806         if test -x "$GIT_DIR"/hooks/post-applypatch
 807         then
 808                 "$GIT_DIR"/hooks/post-applypatch
 809         fi
 810
 811         go_next
 812 done
 813
 814 if test -s "$dotest"/rewritten; then
 815     git notes copy --for-rewrite=rebase < "$dotest"/rewritten
 816     if test -x "$GIT_DIR"/hooks/post-rewrite; then
 817         "$GIT_DIR"/hooks/post-rewrite rebase < "$dotest"/rewritten
 818     fi
 819 fi
 820
 821 rm -fr "$dotest"
 822 git gc --auto