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