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