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 s,signoff       add a Signed-off-by line to the commit message
  15 u,utf8          recode into utf8 (default)
  16 k,keep          pass -k flag to git-mailinfo
  17 whitespace=     pass it through git-apply
  18 directory=      pass it through git-apply
  19 C=              pass it through git-apply
  20 p=              pass it through git-apply
  21 reject          pass it through git-apply
  22 resolvemsg=     override error message when patch failure occurs
  23 r,resolved      to be used after a patch failure
  24 skip            skip the current patch
  25 abort           restore the original branch and abort the patching operation.
  26 committer-date-is-author-date    lie about committer date
  27 ignore-date     use current timestamp for author date
  28 rebasing*       (internal use for git-rebase)"
  29
  30 . git-sh-setup
  31 prefix=$(git rev-parse --show-prefix)
  32 set_reflog_action am
  33 require_work_tree
  34 cd_to_toplevel
  35
  36 git var GIT_COMMITTER_IDENT >/dev/null ||
  37         die "You need to set your committer info first"
  38
  39 sq () {
  40         for sqarg
  41         do
  42                 printf "%s" "$sqarg" |
  43                 sed -e 's/'\''/'\''\\'\'''\''/g' -e 's/.*/ '\''&'\''/'
  44         done
  45 }
  46
  47 stop_here () {
  48     echo "$1" >"$dotest/next"
  49     exit 1
  50 }
  51
  52 stop_here_user_resolve () {
  53     if [ -n "$resolvemsg" ]; then
  54             printf '%s\n' "$resolvemsg"
  55             stop_here $1
  56     fi
  57     cmdline="git am"
  58     if test '' != "$interactive"
  59     then
  60         cmdline="$cmdline -i"
  61     fi
  62     if test '' != "$threeway"
  63     then
  64         cmdline="$cmdline -3"
  65     fi
  66     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  67     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  68     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  69
  70     stop_here $1
  71 }
  72
  73 go_next () {
  74         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  75                 "$dotest/patch" "$dotest/info"
  76         echo "$next" >"$dotest/next"
  77         this=$next
  78 }
  79
  80 cannot_fallback () {
  81         echo "$1"
  82         echo "Cannot fall back to three-way merge."
  83         exit 1
  84 }
  85
  86 fall_back_3way () {
  87     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  88
  89     rm -fr "$dotest"/patch-merge-*
  90     mkdir "$dotest/patch-merge-tmp-dir"
  91
  92     # First see if the patch records the index info that we can use.
  93     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  94         "$dotest/patch" &&
  95     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  96     git write-tree >"$dotest/patch-merge-base+" ||
  97     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  98
  99     echo Using index info to reconstruct a base tree...
 100     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 101         git apply --cached <"$dotest/patch"
 102     then
 103         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 104         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
 105     else
 106         cannot_fallback "Did you hand edit your patch?
 107 It does not apply to blobs recorded in its index."
 108     fi
 109
 110     test -f "$dotest/patch-merge-index" &&
 111     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 112     orig_tree=$(cat "$dotest/patch-merge-base") &&
 113     rm -fr "$dotest"/patch-merge-* || exit 1
 114
 115     echo Falling back to patching base and 3-way merge...
 116
 117     # This is not so wrong.  Depending on which base we picked,
 118     # orig_tree may be wildly different from ours, but his_tree
 119     # has the same set of wildly different changes in parts the
 120     # patch did not touch, so recursive ends up canceling them,
 121     # saying that we reverted all those changes.
 122
 123     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 124     export GITHEAD_$his_tree
 125     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 126             git rerere
 127             echo Failed to merge in the changes.
 128             exit 1
 129     }
 130     unset GITHEAD_$his_tree
 131 }
 132
 133 prec=4
 134 dotest="$GIT_DIR/rebase-apply"
 135 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
 136 resolvemsg= resume=
 137 git_apply_opt=
 138 committer_date_is_author_date=
 139 ignore_date=
 140
 141 while test $# != 0
 142 do
 143         case "$1" in
 144         -i|--interactive)
 145                 interactive=t ;;
 146         -b|--binary)
 147                 : ;;
 148         -3|--3way)
 149                 threeway=t ;;
 150         -s|--signoff)
 151                 sign=t ;;
 152         -u|--utf8)
 153                 utf8=t ;; # this is now default
 154         --no-utf8)
 155                 utf8= ;;
 156         -k|--keep)
 157                 keep=t ;;
 158         -r|--resolved)
 159                 resolved=t ;;
 160         --skip)
 161                 skip=t ;;
 162         --abort)
 163                 abort=t ;;
 164         --rebasing)
 165                 rebasing=t threeway=t keep=t ;;
 166         -d|--dotest)
 167                 die "-d option is no longer supported.  Do not use."
 168                 ;;
 169         --resolvemsg)
 170                 shift; resolvemsg=$1 ;;
 171         --whitespace|--directory)
 172                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 173         -C|-p)
 174                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 175         --reject)
 176                 git_apply_opt="$git_apply_opt $1" ;;
 177         --committer-date-is-author-date)
 178                 committer_date_is_author_date=t ;;
 179         --ignore-date)
 180                 ignore_date=t ;;
 181         --)
 182                 shift; break ;;
 183         *)
 184                 usage ;;
 185         esac
 186         shift
 187 done
 188
 189 # If the dotest directory exists, but we have finished applying all the
 190 # patches in them, clear it out.
 191 if test -d "$dotest" &&
 192    last=$(cat "$dotest/last") &&
 193    next=$(cat "$dotest/next") &&
 194    test $# != 0 &&
 195    test "$next" -gt "$last"
 196 then
 197    rm -fr "$dotest"
 198 fi
 199
 200 if test -d "$dotest"
 201 then
 202         case "$#,$skip$resolved$abort" in
 203         0,*t*)
 204                 # Explicit resume command and we do not have file, so
 205                 # we are happy.
 206                 : ;;
 207         0,)
 208                 # No file input but without resume parameters; catch
 209                 # user error to feed us a patch from standard input
 210                 # when there is already $dotest.  This is somewhat
 211                 # unreliable -- stdin could be /dev/null for example
 212                 # and the caller did not intend to feed us a patch but
 213                 # wanted to continue unattended.
 214                 test -t 0
 215                 ;;
 216         *)
 217                 false
 218                 ;;
 219         esac ||
 220         die "previous rebase directory $dotest still exists but mbox given."
 221         resume=yes
 222
 223         case "$skip,$abort" in
 224         t,t)
 225                 die "Please make up your mind. --skip or --abort?"
 226                 ;;
 227         t,)
 228                 git rerere clear
 229                 git read-tree --reset -u HEAD HEAD
 230                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 231                 git reset HEAD
 232                 git update-ref ORIG_HEAD $orig_head
 233                 ;;
 234         ,t)
 235                 if test -f "$dotest/rebasing"
 236                 then
 237                         exec git rebase --abort
 238                 fi
 239                 git rerere clear
 240                 test -f "$dotest/dirtyindex" || {
 241                         git read-tree --reset -u HEAD ORIG_HEAD
 242                         git reset ORIG_HEAD
 243                 }
 244                 rm -fr "$dotest"
 245                 exit ;;
 246         esac
 247         rm -f "$dotest/dirtyindex"
 248 else
 249         # Make sure we are not given --skip, --resolved, nor --abort
 250         test "$skip$resolved$abort" = "" ||
 251                 die "Resolve operation not in progress, we are not resuming."
 252
 253         # Start afresh.
 254         mkdir -p "$dotest" || exit
 255
 256         if test -n "$prefix" && test $# != 0
 257         then
 258                 first=t
 259                 for arg
 260                 do
 261                         test -n "$first" && {
 262                                 set x
 263                                 first=
 264                         }
 265                         case "$arg" in
 266                         /*)
 267                                 set "$@" "$arg" ;;
 268                         *)
 269                                 set "$@" "$prefix$arg" ;;
 270                         esac
 271                 done
 272                 shift
 273         fi
 274         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 275                 rm -fr "$dotest"
 276                 exit 1
 277         }
 278
 279         # -s, -u, -k, --whitespace, -3, -C and -p flags are kept
 280         # for the resuming session after a patch failure.
 281         # -i can and must be given when resuming.
 282         echo " $git_apply_opt" >"$dotest/apply-opt"
 283         echo "$threeway" >"$dotest/threeway"
 284         echo "$sign" >"$dotest/sign"
 285         echo "$utf8" >"$dotest/utf8"
 286         echo "$keep" >"$dotest/keep"
 287         echo 1 >"$dotest/next"
 288         if test -n "$rebasing"
 289         then
 290                 : >"$dotest/rebasing"
 291         else
 292                 : >"$dotest/applying"
 293                 git update-ref ORIG_HEAD HEAD
 294         fi
 295 fi
 296
 297 case "$resolved" in
 298 '')
 299         files=$(git diff-index --cached --name-only HEAD --) || exit
 300         if test "$files"
 301         then
 302                 : >"$dotest/dirtyindex"
 303                 die "Dirty index: cannot apply patches (dirty: $files)"
 304         fi
 305 esac
 306
 307 if test "$(cat "$dotest/utf8")" = t
 308 then
 309         utf8=-u
 310 else
 311         utf8=-n
 312 fi
 313 if test "$(cat "$dotest/keep")" = t
 314 then
 315         keep=-k
 316 fi
 317 if test "$(cat "$dotest/threeway")" = t
 318 then
 319         threeway=t
 320 fi
 321 git_apply_opt=$(cat "$dotest/apply-opt")
 322 if test "$(cat "$dotest/sign")" = t
 323 then
 324         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
 325                         s/>.*/>/
 326                         s/^/Signed-off-by: /'
 327                 `
 328 else
 329         SIGNOFF=
 330 fi
 331
 332 last=`cat "$dotest/last"`
 333 this=`cat "$dotest/next"`
 334 if test "$skip" = t
 335 then
 336         this=`expr "$this" + 1`
 337         resume=
 338 fi
 339
 340 if test "$this" -gt "$last"
 341 then
 342         echo Nothing to do.
 343         rm -fr "$dotest"
 344         exit
 345 fi
 346
 347 while test "$this" -le "$last"
 348 do
 349         msgnum=`printf "%0${prec}d" $this`
 350         next=`expr "$this" + 1`
 351         test -f "$dotest/$msgnum" || {
 352                 resume=
 353                 go_next
 354                 continue
 355         }
 356
 357         # If we are not resuming, parse and extract the patch information
 358         # into separate files:
 359         #  - info records the authorship and title
 360         #  - msg is the rest of commit log message
 361         #  - patch is the patch body.
 362         #
 363         # When we are resuming, these files are either already prepared
 364         # by the user, or the user can tell us to do so by --resolved flag.
 365         case "$resume" in
 366         '')
 367                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 368                         <"$dotest/$msgnum" >"$dotest/info" ||
 369                         stop_here $this
 370
 371                 # skip pine's internal folder data
 372                 grep '^Author: Mail System Internal Data$' \
 373                         <"$dotest"/info >/dev/null &&
 374                         go_next && continue
 375
 376                 test -s "$dotest/patch" || {
 377                         echo "Patch is empty.  Was it split wrong?"
 378                         stop_here $this
 379                 }
 380                 if test -f "$dotest/rebasing" &&
 381                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 382                                 -e q "$dotest/$msgnum") &&
 383                         test "$(git cat-file -t "$commit")" = commit
 384                 then
 385                         git cat-file commit "$commit" |
 386                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 387                 else
 388                         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 389                         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 390
 391                         (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
 392                                 git stripspace > "$dotest/msg-clean"
 393                 fi
 394                 ;;
 395         esac
 396
 397         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 398         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 399         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 400
 401         if test -z "$GIT_AUTHOR_EMAIL"
 402         then
 403                 echo "Patch does not have a valid e-mail address."
 404                 stop_here $this
 405         fi
 406
 407         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 408
 409         case "$resume" in
 410         '')
 411             if test '' != "$SIGNOFF"
 412             then
 413                 LAST_SIGNED_OFF_BY=`
 414                     sed -ne '/^Signed-off-by: /p' \
 415                     "$dotest/msg-clean" |
 416                     sed -ne '$p'
 417                 `
 418                 ADD_SIGNOFF=`
 419                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 420                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 421                     echo "$SIGNOFF"
 422                 }`
 423             else
 424                 ADD_SIGNOFF=
 425             fi
 426             {
 427                 if test -s "$dotest/msg-clean"
 428                 then
 429                         cat "$dotest/msg-clean"
 430                 fi
 431                 if test '' != "$ADD_SIGNOFF"
 432                 then
 433                         echo "$ADD_SIGNOFF"
 434                 fi
 435             } >"$dotest/final-commit"
 436             ;;
 437         *)
 438                 case "$resolved$interactive" in
 439                 tt)
 440                         # This is used only for interactive view option.
 441                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 442                         ;;
 443                 esac
 444         esac
 445
 446         resume=
 447         if test "$interactive" = t
 448         then
 449             test -t 0 ||
 450             die "cannot be interactive without stdin connected to a terminal."
 451             action=again
 452             while test "$action" = again
 453             do
 454                 echo "Commit Body is:"
 455                 echo "--------------------------"
 456                 cat "$dotest/final-commit"
 457                 echo "--------------------------"
 458                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 459                 read reply
 460                 case "$reply" in
 461                 [yY]*) action=yes ;;
 462                 [aA]*) action=yes interactive= ;;
 463                 [nN]*) action=skip ;;
 464                 [eE]*) git_editor "$dotest/final-commit"
 465                        action=again ;;
 466                 [vV]*) action=again
 467                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 468                 *)     action=again ;;
 469                 esac
 470             done
 471         else
 472             action=yes
 473         fi
 474         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 475
 476         if test $action = skip
 477         then
 478                 go_next
 479                 continue
 480         fi
 481
 482         if test -x "$GIT_DIR"/hooks/applypatch-msg
 483         then
 484                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 485                 stop_here $this
 486         fi
 487
 488         printf 'Applying: %s\n' "$FIRSTLINE"
 489
 490         case "$resolved" in
 491         '')
 492                 eval 'git apply '"$git_apply_opt"' --index "$dotest/patch"'
 493                 apply_status=$?
 494                 ;;
 495         t)
 496                 # Resolved means the user did all the hard work, and
 497                 # we do not have to do any patch application.  Just
 498                 # trust what the user has in the index file and the
 499                 # working tree.
 500                 resolved=
 501                 git diff-index --quiet --cached HEAD -- && {
 502                         echo "No changes - did you forget to use 'git add'?"
 503                         stop_here_user_resolve $this
 504                 }
 505                 unmerged=$(git ls-files -u)
 506                 if test -n "$unmerged"
 507                 then
 508                         echo "You still have unmerged paths in your index"
 509                         echo "did you forget to use 'git add'?"
 510                         stop_here_user_resolve $this
 511                 fi
 512                 apply_status=0
 513                 git rerere
 514                 ;;
 515         esac
 516
 517         if test $apply_status = 1 && test "$threeway" = t
 518         then
 519                 if (fall_back_3way)
 520                 then
 521                     # Applying the patch to an earlier tree and merging the
 522                     # result may have produced the same tree as ours.
 523                     git diff-index --quiet --cached HEAD -- && {
 524                         echo No changes -- Patch already applied.
 525                         go_next
 526                         continue
 527                     }
 528                     # clear apply_status -- we have successfully merged.
 529                     apply_status=0
 530                 fi
 531         fi
 532         if test $apply_status != 0
 533         then
 534                 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
 535                 stop_here_user_resolve $this
 536         fi
 537
 538         if test -x "$GIT_DIR"/hooks/pre-applypatch
 539         then
 540                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 541         fi
 542
 543         tree=$(git write-tree) &&
 544         parent=$(git rev-parse --verify HEAD) &&
 545         commit=$(
 546                 if test -n "$ignore_date"
 547                 then
 548                         GIT_AUTHOR_DATE=
 549                 fi
 550                 if test -n "$committer_date_is_author_date"
 551                 then
 552                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
 553                         export GIT_COMMITTER_DATE
 554                 fi &&
 555                 git commit-tree $tree -p $parent <"$dotest/final-commit"
 556         ) &&
 557         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 558         stop_here $this
 559
 560         if test -x "$GIT_DIR"/hooks/post-applypatch
 561         then
 562                 "$GIT_DIR"/hooks/post-applypatch
 563         fi
 564
 565         go_next
 566 done
 567
 568 git gc --auto
 569
 570 rm -fr "$dotest"