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=$(git rev-parse --show-prefix)
  32 set_reflog_action am
  33 require_work_tree
  34 cd_to_toplevel
  35
  36 git var GIT_COMMITTER_IDENT >/dev/null ||
  37         die "You need to set your committer info first"
  38
  39 if git rev-parse --verify -q HEAD >/dev/null
  40 then
  41         HAS_HEAD=yes
  42 else
  43         HAS_HEAD=
  44 fi
  45
  46 sq () {
  47         for sqarg
  48         do
  49                 printf "%s" "$sqarg" |
  50                 sed -e 's/'\''/'\''\\'\'''\''/g' -e 's/.*/ '\''&'\''/'
  51         done
  52 }
  53
  54 stop_here () {
  55     echo "$1" >"$dotest/next"
  56     exit 1
  57 }
  58
  59 stop_here_user_resolve () {
  60     if [ -n "$resolvemsg" ]; then
  61             printf '%s\n' "$resolvemsg"
  62             stop_here $1
  63     fi
  64     cmdline="git am"
  65     if test '' != "$interactive"
  66     then
  67         cmdline="$cmdline -i"
  68     fi
  69     if test '' != "$threeway"
  70     then
  71         cmdline="$cmdline -3"
  72     fi
  73     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  74     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  75     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  76
  77     stop_here $1
  78 }
  79
  80 go_next () {
  81         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  82                 "$dotest/patch" "$dotest/info"
  83         echo "$next" >"$dotest/next"
  84         this=$next
  85 }
  86
  87 cannot_fallback () {
  88         echo "$1"
  89         echo "Cannot fall back to three-way merge."
  90         exit 1
  91 }
  92
  93 fall_back_3way () {
  94     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  95
  96     rm -fr "$dotest"/patch-merge-*
  97     mkdir "$dotest/patch-merge-tmp-dir"
  98
  99     # First see if the patch records the index info that we can use.
 100     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
 101         "$dotest/patch" &&
 102     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 103     git write-tree >"$dotest/patch-merge-base+" ||
 104     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 105
 106     echo Using index info to reconstruct a base tree...
 107     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 108         git apply --cached <"$dotest/patch"
 109     then
 110         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 111         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
 112     else
 113         cannot_fallback "Did you hand edit your patch?
 114 It does not apply to blobs recorded in its index."
 115     fi
 116
 117     test -f "$dotest/patch-merge-index" &&
 118     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 119     orig_tree=$(cat "$dotest/patch-merge-base") &&
 120     rm -fr "$dotest"/patch-merge-* || exit 1
 121
 122     echo Falling back to patching base and 3-way merge...
 123
 124     # This is not so wrong.  Depending on which base we picked,
 125     # orig_tree may be wildly different from ours, but his_tree
 126     # has the same set of wildly different changes in parts the
 127     # patch did not touch, so recursive ends up canceling them,
 128     # saying that we reverted all those changes.
 129
 130     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 131     export GITHEAD_$his_tree
 132     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 133             git rerere
 134             echo Failed to merge in the changes.
 135             exit 1
 136     }
 137     unset GITHEAD_$his_tree
 138 }
 139
 140 prec=4
 141 dotest="$GIT_DIR/rebase-apply"
 142 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
 143 resolvemsg= resume=
 144 git_apply_opt=
 145 committer_date_is_author_date=
 146 ignore_date=
 147
 148 while test $# != 0
 149 do
 150         case "$1" in
 151         -i|--interactive)
 152                 interactive=t ;;
 153         -b|--binary)
 154                 : ;;
 155         -3|--3way)
 156                 threeway=t ;;
 157         -s|--signoff)
 158                 sign=t ;;
 159         -u|--utf8)
 160                 utf8=t ;; # this is now default
 161         --no-utf8)
 162                 utf8= ;;
 163         -k|--keep)
 164                 keep=t ;;
 165         -r|--resolved)
 166                 resolved=t ;;
 167         --skip)
 168                 skip=t ;;
 169         --abort)
 170                 abort=t ;;
 171         --rebasing)
 172                 rebasing=t threeway=t keep=t ;;
 173         -d|--dotest)
 174                 die "-d option is no longer supported.  Do not use."
 175                 ;;
 176         --resolvemsg)
 177                 shift; resolvemsg=$1 ;;
 178         --whitespace|--directory)
 179                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 180         -C|-p)
 181                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 182         --reject)
 183                 git_apply_opt="$git_apply_opt $1" ;;
 184         --committer-date-is-author-date)
 185                 committer_date_is_author_date=t ;;
 186         --ignore-date)
 187                 ignore_date=t ;;
 188         --)
 189                 shift; break ;;
 190         *)
 191                 usage ;;
 192         esac
 193         shift
 194 done
 195
 196 # If the dotest directory exists, but we have finished applying all the
 197 # patches in them, clear it out.
 198 if test -d "$dotest" &&
 199    last=$(cat "$dotest/last") &&
 200    next=$(cat "$dotest/next") &&
 201    test $# != 0 &&
 202    test "$next" -gt "$last"
 203 then
 204    rm -fr "$dotest"
 205 fi
 206
 207 if test -d "$dotest"
 208 then
 209         case "$#,$skip$resolved$abort" in
 210         0,*t*)
 211                 # Explicit resume command and we do not have file, so
 212                 # we are happy.
 213                 : ;;
 214         0,)
 215                 # No file input but without resume parameters; catch
 216                 # user error to feed us a patch from standard input
 217                 # when there is already $dotest.  This is somewhat
 218                 # unreliable -- stdin could be /dev/null for example
 219                 # and the caller did not intend to feed us a patch but
 220                 # wanted to continue unattended.
 221                 test -t 0
 222                 ;;
 223         *)
 224                 false
 225                 ;;
 226         esac ||
 227         die "previous rebase directory $dotest still exists but mbox given."
 228         resume=yes
 229
 230         case "$skip,$abort" in
 231         t,t)
 232                 die "Please make up your mind. --skip or --abort?"
 233                 ;;
 234         t,)
 235                 git rerere clear
 236                 git read-tree --reset -u HEAD HEAD
 237                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 238                 git reset HEAD
 239                 git update-ref ORIG_HEAD $orig_head
 240                 ;;
 241         ,t)
 242                 if test -f "$dotest/rebasing"
 243                 then
 244                         exec git rebase --abort
 245                 fi
 246                 git rerere clear
 247                 test -f "$dotest/dirtyindex" || {
 248                         git read-tree --reset -u HEAD ORIG_HEAD
 249                         git reset ORIG_HEAD
 250                 }
 251                 rm -fr "$dotest"
 252                 exit ;;
 253         esac
 254         rm -f "$dotest/dirtyindex"
 255 else
 256         # Make sure we are not given --skip, --resolved, nor --abort
 257         test "$skip$resolved$abort" = "" ||
 258                 die "Resolve operation not in progress, we are not resuming."
 259
 260         # Start afresh.
 261         mkdir -p "$dotest" || exit
 262
 263         if test -n "$prefix" && test $# != 0
 264         then
 265                 first=t
 266                 for arg
 267                 do
 268                         test -n "$first" && {
 269                                 set x
 270                                 first=
 271                         }
 272                         case "$arg" in
 273                         /*)
 274                                 set "$@" "$arg" ;;
 275                         *)
 276                                 set "$@" "$prefix$arg" ;;
 277                         esac
 278                 done
 279                 shift
 280         fi
 281         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 282                 rm -fr "$dotest"
 283                 exit 1
 284         }
 285
 286         # -s, -u, -k, --whitespace, -3, -C and -p flags are kept
 287         # for the resuming session after a patch failure.
 288         # -i can and must be given when resuming.
 289         echo " $git_apply_opt" >"$dotest/apply-opt"
 290         echo "$threeway" >"$dotest/threeway"
 291         echo "$sign" >"$dotest/sign"
 292         echo "$utf8" >"$dotest/utf8"
 293         echo "$keep" >"$dotest/keep"
 294         echo 1 >"$dotest/next"
 295         if test -n "$rebasing"
 296         then
 297                 : >"$dotest/rebasing"
 298         else
 299                 : >"$dotest/applying"
 300                 if test -n "$HAS_HEAD"
 301                 then
 302                         git update-ref ORIG_HEAD HEAD
 303                 else
 304                         git update-ref -d ORIG_HEAD >/dev/null 2>&1
 305                 fi
 306         fi
 307 fi
 308
 309 case "$resolved" in
 310 '')
 311         case "$HAS_HEAD" in
 312         '')
 313                 files=$(git ls-files) ;;
 314         ?*)
 315                 files=$(git diff-index --cached --name-only HEAD --) ;;
 316         esac || exit
 317         if test "$files"
 318         then
 319                 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
 320                 die "Dirty index: cannot apply patches (dirty: $files)"
 321         fi
 322 esac
 323
 324 if test "$(cat "$dotest/utf8")" = t
 325 then
 326         utf8=-u
 327 else
 328         utf8=-n
 329 fi
 330 if test "$(cat "$dotest/keep")" = t
 331 then
 332         keep=-k
 333 fi
 334 if test "$(cat "$dotest/threeway")" = t
 335 then
 336         threeway=t
 337 fi
 338 git_apply_opt=$(cat "$dotest/apply-opt")
 339 if test "$(cat "$dotest/sign")" = t
 340 then
 341         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
 342                         s/>.*/>/
 343                         s/^/Signed-off-by: /'
 344                 `
 345 else
 346         SIGNOFF=
 347 fi
 348
 349 last=`cat "$dotest/last"`
 350 this=`cat "$dotest/next"`
 351 if test "$skip" = t
 352 then
 353         this=`expr "$this" + 1`
 354         resume=
 355 fi
 356
 357 if test "$this" -gt "$last"
 358 then
 359         echo Nothing to do.
 360         rm -fr "$dotest"
 361         exit
 362 fi
 363
 364 while test "$this" -le "$last"
 365 do
 366         msgnum=`printf "%0${prec}d" $this`
 367         next=`expr "$this" + 1`
 368         test -f "$dotest/$msgnum" || {
 369                 resume=
 370                 go_next
 371                 continue
 372         }
 373
 374         # If we are not resuming, parse and extract the patch information
 375         # into separate files:
 376         #  - info records the authorship and title
 377         #  - msg is the rest of commit log message
 378         #  - patch is the patch body.
 379         #
 380         # When we are resuming, these files are either already prepared
 381         # by the user, or the user can tell us to do so by --resolved flag.
 382         case "$resume" in
 383         '')
 384                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 385                         <"$dotest/$msgnum" >"$dotest/info" ||
 386                         stop_here $this
 387
 388                 # skip pine's internal folder data
 389                 grep '^Author: Mail System Internal Data$' \
 390                         <"$dotest"/info >/dev/null &&
 391                         go_next && continue
 392
 393                 test -s "$dotest/patch" || {
 394                         echo "Patch is empty.  Was it split wrong?"
 395                         stop_here $this
 396                 }
 397                 if test -f "$dotest/rebasing" &&
 398                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 399                                 -e q "$dotest/$msgnum") &&
 400                         test "$(git cat-file -t "$commit")" = commit
 401                 then
 402                         git cat-file commit "$commit" |
 403                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 404                 else
 405                         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 406                         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 407
 408                         (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
 409                                 git stripspace > "$dotest/msg-clean"
 410                 fi
 411                 ;;
 412         esac
 413
 414         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 415         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 416         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 417
 418         if test -z "$GIT_AUTHOR_EMAIL"
 419         then
 420                 echo "Patch does not have a valid e-mail address."
 421                 stop_here $this
 422         fi
 423
 424         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 425
 426         case "$resume" in
 427         '')
 428             if test '' != "$SIGNOFF"
 429             then
 430                 LAST_SIGNED_OFF_BY=`
 431                     sed -ne '/^Signed-off-by: /p' \
 432                     "$dotest/msg-clean" |
 433                     sed -ne '$p'
 434                 `
 435                 ADD_SIGNOFF=`
 436                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 437                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 438                     echo "$SIGNOFF"
 439                 }`
 440             else
 441                 ADD_SIGNOFF=
 442             fi
 443             {
 444                 if test -s "$dotest/msg-clean"
 445                 then
 446                         cat "$dotest/msg-clean"
 447                 fi
 448                 if test '' != "$ADD_SIGNOFF"
 449                 then
 450                         echo "$ADD_SIGNOFF"
 451                 fi
 452             } >"$dotest/final-commit"
 453             ;;
 454         *)
 455                 case "$resolved$interactive" in
 456                 tt)
 457                         # This is used only for interactive view option.
 458                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 459                         ;;
 460                 esac
 461         esac
 462
 463         resume=
 464         if test "$interactive" = t
 465         then
 466             test -t 0 ||
 467             die "cannot be interactive without stdin connected to a terminal."
 468             action=again
 469             while test "$action" = again
 470             do
 471                 echo "Commit Body is:"
 472                 echo "--------------------------"
 473                 cat "$dotest/final-commit"
 474                 echo "--------------------------"
 475                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 476                 read reply
 477                 case "$reply" in
 478                 [yY]*) action=yes ;;
 479                 [aA]*) action=yes interactive= ;;
 480                 [nN]*) action=skip ;;
 481                 [eE]*) git_editor "$dotest/final-commit"
 482                        action=again ;;
 483                 [vV]*) action=again
 484                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 485                 *)     action=again ;;
 486                 esac
 487             done
 488         else
 489             action=yes
 490         fi
 491         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 492
 493         if test $action = skip
 494         then
 495                 go_next
 496                 continue
 497         fi
 498
 499         if test -x "$GIT_DIR"/hooks/applypatch-msg
 500         then
 501                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 502                 stop_here $this
 503         fi
 504
 505         printf 'Applying: %s\n' "$FIRSTLINE"
 506
 507         case "$resolved" in
 508         '')
 509                 eval 'git apply '"$git_apply_opt"' --index "$dotest/patch"'
 510                 apply_status=$?
 511                 ;;
 512         t)
 513                 # Resolved means the user did all the hard work, and
 514                 # we do not have to do any patch application.  Just
 515                 # trust what the user has in the index file and the
 516                 # working tree.
 517                 resolved=
 518                 git diff-index --quiet --cached HEAD -- && {
 519                         echo "No changes - did you forget to use 'git add'?"
 520                         stop_here_user_resolve $this
 521                 }
 522                 unmerged=$(git ls-files -u)
 523                 if test -n "$unmerged"
 524                 then
 525                         echo "You still have unmerged paths in your index"
 526                         echo "did you forget to use 'git add'?"
 527                         stop_here_user_resolve $this
 528                 fi
 529                 apply_status=0
 530                 git rerere
 531                 ;;
 532         esac
 533
 534         if test $apply_status = 1 && test "$threeway" = t
 535         then
 536                 if (fall_back_3way)
 537                 then
 538                     # Applying the patch to an earlier tree and merging the
 539                     # result may have produced the same tree as ours.
 540                     git diff-index --quiet --cached HEAD -- && {
 541                         echo No changes -- Patch already applied.
 542                         go_next
 543                         continue
 544                     }
 545                     # clear apply_status -- we have successfully merged.
 546                     apply_status=0
 547                 fi
 548         fi
 549         if test $apply_status != 0
 550         then
 551                 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
 552                 stop_here_user_resolve $this
 553         fi
 554
 555         if test -x "$GIT_DIR"/hooks/pre-applypatch
 556         then
 557                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 558         fi
 559
 560         tree=$(git write-tree) &&
 561         commit=$(
 562                 if test -n "$ignore_date"
 563                 then
 564                         GIT_AUTHOR_DATE=
 565                 fi
 566                 parent=$(git rev-parse --verify -q HEAD) ||
 567                 echo >&2 "applying to an empty history"
 568
 569                 if test -n "$committer_date_is_author_date"
 570                 then
 571                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
 572                         export GIT_COMMITTER_DATE
 573                 fi &&
 574                 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
 575         ) &&
 576         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 577         stop_here $this
 578
 579         if test -x "$GIT_DIR"/hooks/post-applypatch
 580         then
 581                 "$GIT_DIR"/hooks/post-applypatch
 582         fi
 583
 584         go_next
 585 done
 586
 587 git gc --auto
 588
 589 rm -fr "$dotest"