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
  10 git am [options] --skip
  11 --
  12 d,dotest=       (removed -- do not use)
  13 i,interactive   run interactively
  14 b,binary        pass --allow-binary-replacement to git-apply
  15 3,3way          allow fall back on 3way merging if needed
  16 s,signoff       add a Signed-off-by line to the commit message
  17 u,utf8          recode into utf8 (default)
  18 k,keep          pass -k flag to git-mailinfo
  19 whitespace=     pass it through git-apply
  20 C=              pass it through git-apply
  21 p=              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 rebasing        (internal use for git-rebase)"
  27
  28 . git-sh-setup
  29 prefix=$(git rev-parse --show-prefix)
  30 set_reflog_action am
  31 require_work_tree
  32 cd_to_toplevel
  33
  34 git var GIT_COMMITTER_IDENT >/dev/null ||
  35         die "You need to set your committer info first"
  36
  37 stop_here () {
  38     echo "$1" >"$dotest/next"
  39     exit 1
  40 }
  41
  42 stop_here_user_resolve () {
  43     if [ -n "$resolvemsg" ]; then
  44             printf '%s\n' "$resolvemsg"
  45             stop_here $1
  46     fi
  47     cmdline="git am"
  48     if test '' != "$interactive"
  49     then
  50         cmdline="$cmdline -i"
  51     fi
  52     if test '' != "$threeway"
  53     then
  54         cmdline="$cmdline -3"
  55     fi
  56     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  57     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  58     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  59
  60     stop_here $1
  61 }
  62
  63 go_next () {
  64         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  65                 "$dotest/patch" "$dotest/info"
  66         echo "$next" >"$dotest/next"
  67         this=$next
  68 }
  69
  70 cannot_fallback () {
  71         echo "$1"
  72         echo "Cannot fall back to three-way merge."
  73         exit 1
  74 }
  75
  76 fall_back_3way () {
  77     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  78
  79     rm -fr "$dotest"/patch-merge-*
  80     mkdir "$dotest/patch-merge-tmp-dir"
  81
  82     # First see if the patch records the index info that we can use.
  83     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  84         "$dotest/patch" &&
  85     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  86     git write-tree >"$dotest/patch-merge-base+" ||
  87     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  88
  89     echo Using index info to reconstruct a base tree...
  90     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  91         git apply $binary --cached <"$dotest/patch"
  92     then
  93         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  94         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  95     else
  96         cannot_fallback "Did you hand edit your patch?
  97 It does not apply to blobs recorded in its index."
  98     fi
  99
 100     test -f "$dotest/patch-merge-index" &&
 101     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 102     orig_tree=$(cat "$dotest/patch-merge-base") &&
 103     rm -fr "$dotest"/patch-merge-* || exit 1
 104
 105     echo Falling back to patching base and 3-way merge...
 106
 107     # This is not so wrong.  Depending on which base we picked,
 108     # orig_tree may be wildly different from ours, but his_tree
 109     # has the same set of wildly different changes in parts the
 110     # patch did not touch, so recursive ends up canceling them,
 111     # saying that we reverted all those changes.
 112
 113     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 114     export GITHEAD_$his_tree
 115     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 116             git rerere
 117             echo Failed to merge in the changes.
 118             exit 1
 119     }
 120     unset GITHEAD_$his_tree
 121 }
 122
 123 prec=4
 124 dotest="$GIT_DIR/rebase-apply"
 125 sign= utf8=t keep= skip= interactive= resolved= binary= rebasing= abort=
 126 resolvemsg= resume=
 127 git_apply_opt=
 128
 129 while test $# != 0
 130 do
 131         case "$1" in
 132         -i|--interactive)
 133                 interactive=t ;;
 134         -b|--binary)
 135                 binary=t ;;
 136         -3|--3way)
 137                 threeway=t ;;
 138         -s|--signoff)
 139                 sign=t ;;
 140         -u|--utf8)
 141                 utf8=t ;; # this is now default
 142         --no-utf8)
 143                 utf8= ;;
 144         -k|--keep)
 145                 keep=t ;;
 146         -r|--resolved)
 147                 resolved=t ;;
 148         --skip)
 149                 skip=t ;;
 150         --abort)
 151                 abort=t ;;
 152         --rebasing)
 153                 rebasing=t threeway=t keep=t binary=t ;;
 154         -d|--dotest)
 155                 die "-d option is no longer supported.  Do not use."
 156                 ;;
 157         --resolvemsg)
 158                 shift; resolvemsg=$1 ;;
 159         --whitespace)
 160                 git_apply_opt="$git_apply_opt $1=$2"; shift ;;
 161         -C|-p)
 162                 git_apply_opt="$git_apply_opt $1$2"; shift ;;
 163         --)
 164                 shift; break ;;
 165         *)
 166                 usage ;;
 167         esac
 168         shift
 169 done
 170
 171 # If the dotest directory exists, but we have finished applying all the
 172 # patches in them, clear it out.
 173 if test -d "$dotest" &&
 174    last=$(cat "$dotest/last") &&
 175    next=$(cat "$dotest/next") &&
 176    test $# != 0 &&
 177    test "$next" -gt "$last"
 178 then
 179    rm -fr "$dotest"
 180 fi
 181
 182 if test -d "$dotest"
 183 then
 184         case "$#,$skip$resolved$abort" in
 185         0,*t*)
 186                 # Explicit resume command and we do not have file, so
 187                 # we are happy.
 188                 : ;;
 189         0,)
 190                 # No file input but without resume parameters; catch
 191                 # user error to feed us a patch from standard input
 192                 # when there is already $dotest.  This is somewhat
 193                 # unreliable -- stdin could be /dev/null for example
 194                 # and the caller did not intend to feed us a patch but
 195                 # wanted to continue unattended.
 196                 tty -s
 197                 ;;
 198         *)
 199                 false
 200                 ;;
 201         esac ||
 202         die "previous rebase directory $dotest still exists but mbox given."
 203         resume=yes
 204
 205         case "$skip,$abort" in
 206         t,)
 207                 git rerere clear
 208                 git read-tree --reset -u HEAD HEAD
 209                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 210                 git reset HEAD
 211                 git update-ref ORIG_HEAD $orig_head
 212                 ;;
 213         ,t)
 214                 git rerere clear
 215                 git read-tree --reset -u HEAD ORIG_HEAD
 216                 git reset ORIG_HEAD
 217                 rm -fr "$dotest"
 218                 exit ;;
 219         esac
 220 else
 221         # Make sure we are not given --skip, --resolved, nor --abort
 222         test "$skip$resolved$abort" = "" ||
 223                 die "Resolve operation not in progress, we are not resuming."
 224
 225         # Start afresh.
 226         mkdir -p "$dotest" || exit
 227
 228         if test -n "$prefix" && test $# != 0
 229         then
 230                 first=t
 231                 for arg
 232                 do
 233                         test -n "$first" && {
 234                                 set x
 235                                 first=
 236                         }
 237                         case "$arg" in
 238                         /*)
 239                                 set "$@" "$arg" ;;
 240                         *)
 241                                 set "$@" "$prefix$arg" ;;
 242                         esac
 243                 done
 244                 shift
 245         fi
 246         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 247                 rm -fr "$dotest"
 248                 exit 1
 249         }
 250
 251         # -b, -s, -u, -k and --whitespace flags are kept for the
 252         # resuming session after a patch failure.
 253         # -3 and -i can and must be given when resuming.
 254         echo "$binary" >"$dotest/binary"
 255         echo " $ws" >"$dotest/whitespace"
 256         echo "$sign" >"$dotest/sign"
 257         echo "$utf8" >"$dotest/utf8"
 258         echo "$keep" >"$dotest/keep"
 259         echo 1 >"$dotest/next"
 260         if test -n "$rebasing"
 261         then
 262                 : >"$dotest/rebasing"
 263         else
 264                 : >"$dotest/applying"
 265                 git update-ref ORIG_HEAD HEAD
 266         fi
 267 fi
 268
 269 case "$resolved" in
 270 '')
 271         files=$(git diff-index --cached --name-only HEAD --) || exit
 272         if [ "$files" ]; then
 273            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 274            exit 1
 275         fi
 276 esac
 277
 278 if test "$(cat "$dotest/binary")" = t
 279 then
 280         binary=--allow-binary-replacement
 281 fi
 282 if test "$(cat "$dotest/utf8")" = t
 283 then
 284         utf8=-u
 285 else
 286         utf8=-n
 287 fi
 288 if test "$(cat "$dotest/keep")" = t
 289 then
 290         keep=-k
 291 fi
 292 ws=`cat "$dotest/whitespace"`
 293 if test "$(cat "$dotest/sign")" = t
 294 then
 295         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 296                         s/>.*/>/
 297                         s/^/Signed-off-by: /'
 298                 `
 299 else
 300         SIGNOFF=
 301 fi
 302
 303 last=`cat "$dotest/last"`
 304 this=`cat "$dotest/next"`
 305 if test "$skip" = t
 306 then
 307         this=`expr "$this" + 1`
 308         resume=
 309 fi
 310
 311 if test "$this" -gt "$last"
 312 then
 313         echo Nothing to do.
 314         rm -fr "$dotest"
 315         exit
 316 fi
 317
 318 while test "$this" -le "$last"
 319 do
 320         msgnum=`printf "%0${prec}d" $this`
 321         next=`expr "$this" + 1`
 322         test -f "$dotest/$msgnum" || {
 323                 resume=
 324                 go_next
 325                 continue
 326         }
 327
 328         # If we are not resuming, parse and extract the patch information
 329         # into separate files:
 330         #  - info records the authorship and title
 331         #  - msg is the rest of commit log message
 332         #  - patch is the patch body.
 333         #
 334         # When we are resuming, these files are either already prepared
 335         # by the user, or the user can tell us to do so by --resolved flag.
 336         case "$resume" in
 337         '')
 338                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 339                         <"$dotest/$msgnum" >"$dotest/info" ||
 340                         stop_here $this
 341
 342                 # skip pine's internal folder data
 343                 grep '^Author: Mail System Internal Data$' \
 344                         <"$dotest"/info >/dev/null &&
 345                         go_next && continue
 346
 347                 test -s "$dotest/patch" || {
 348                         echo "Patch is empty.  Was it split wrong?"
 349                         stop_here $this
 350                 }
 351                 if test -f "$dotest/rebasing" &&
 352                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 353                                 -e q "$dotest/$msgnum") &&
 354                         test "$(git cat-file -t "$commit")" = commit
 355                 then
 356                         git cat-file commit "$commit" |
 357                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 358                 else
 359                         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 360                         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 361
 362                         (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
 363                                 git stripspace > "$dotest/msg-clean"
 364                 fi
 365                 ;;
 366         esac
 367
 368         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 369         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 370         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 371
 372         if test -z "$GIT_AUTHOR_EMAIL"
 373         then
 374                 echo "Patch does not have a valid e-mail address."
 375                 stop_here $this
 376         fi
 377
 378         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 379
 380         case "$resume" in
 381         '')
 382             if test '' != "$SIGNOFF"
 383             then
 384                 LAST_SIGNED_OFF_BY=`
 385                     sed -ne '/^Signed-off-by: /p' \
 386                     "$dotest/msg-clean" |
 387                     sed -ne '$p'
 388                 `
 389                 ADD_SIGNOFF=`
 390                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 391                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 392                     echo "$SIGNOFF"
 393                 }`
 394             else
 395                 ADD_SIGNOFF=
 396             fi
 397             {
 398                 if test -s "$dotest/msg-clean"
 399                 then
 400                         cat "$dotest/msg-clean"
 401                 fi
 402                 if test '' != "$ADD_SIGNOFF"
 403                 then
 404                         echo "$ADD_SIGNOFF"
 405                 fi
 406             } >"$dotest/final-commit"
 407             ;;
 408         *)
 409                 case "$resolved$interactive" in
 410                 tt)
 411                         # This is used only for interactive view option.
 412                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 413                         ;;
 414                 esac
 415         esac
 416
 417         resume=
 418         if test "$interactive" = t
 419         then
 420             test -t 0 ||
 421             die "cannot be interactive without stdin connected to a terminal."
 422             action=again
 423             while test "$action" = again
 424             do
 425                 echo "Commit Body is:"
 426                 echo "--------------------------"
 427                 cat "$dotest/final-commit"
 428                 echo "--------------------------"
 429                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 430                 read reply
 431                 case "$reply" in
 432                 [yY]*) action=yes ;;
 433                 [aA]*) action=yes interactive= ;;
 434                 [nN]*) action=skip ;;
 435                 [eE]*) git_editor "$dotest/final-commit"
 436                        action=again ;;
 437                 [vV]*) action=again
 438                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 439                 *)     action=again ;;
 440                 esac
 441             done
 442         else
 443             action=yes
 444         fi
 445         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 446
 447         if test $action = skip
 448         then
 449                 go_next
 450                 continue
 451         fi
 452
 453         if test -x "$GIT_DIR"/hooks/applypatch-msg
 454         then
 455                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 456                 stop_here $this
 457         fi
 458
 459         printf 'Applying: %s\n' "$FIRSTLINE"
 460
 461         case "$resolved" in
 462         '')
 463                 git apply $git_apply_opt $binary --index "$dotest/patch"
 464                 apply_status=$?
 465                 ;;
 466         t)
 467                 # Resolved means the user did all the hard work, and
 468                 # we do not have to do any patch application.  Just
 469                 # trust what the user has in the index file and the
 470                 # working tree.
 471                 resolved=
 472                 git diff-index --quiet --cached HEAD -- && {
 473                         echo "No changes - did you forget to use 'git add'?"
 474                         stop_here_user_resolve $this
 475                 }
 476                 unmerged=$(git ls-files -u)
 477                 if test -n "$unmerged"
 478                 then
 479                         echo "You still have unmerged paths in your index"
 480                         echo "did you forget to use 'git add'?"
 481                         stop_here_user_resolve $this
 482                 fi
 483                 apply_status=0
 484                 git rerere
 485                 ;;
 486         esac
 487
 488         if test $apply_status = 1 && test "$threeway" = t
 489         then
 490                 if (fall_back_3way)
 491                 then
 492                     # Applying the patch to an earlier tree and merging the
 493                     # result may have produced the same tree as ours.
 494                     git diff-index --quiet --cached HEAD -- && {
 495                         echo No changes -- Patch already applied.
 496                         go_next
 497                         continue
 498                     }
 499                     # clear apply_status -- we have successfully merged.
 500                     apply_status=0
 501                 fi
 502         fi
 503         if test $apply_status != 0
 504         then
 505                 echo Patch failed at $msgnum.
 506                 stop_here_user_resolve $this
 507         fi
 508
 509         if test -x "$GIT_DIR"/hooks/pre-applypatch
 510         then
 511                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 512         fi
 513
 514         tree=$(git write-tree) &&
 515         parent=$(git rev-parse --verify HEAD) &&
 516         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 517         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 518         stop_here $this
 519
 520         if test -x "$GIT_DIR"/hooks/post-applypatch
 521         then
 522                 "$GIT_DIR"/hooks/post-applypatch
 523         fi
 524
 525         go_next
 526 done
 527
 528 git gc --auto
 529
 530 rm -fr "$dotest"