git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 OPTIONS_KEEPDASHDASH=
   6 OPTIONS_SPEC="\
   7 git-am [options] <mbox>|<Maildir>...
   8 git-am [options] --resolved
   9 git-am [options] --skip
  10 --
  11 d,dotest=       use <dir> and not .dotest
  12 i,interactive   run interactively
  13 b,binary        pass --allo-binary-replacement to git-apply
  14 3,3way          allow fall back on 3way merging if needed
  15 s,signoff       add a Signed-off-by line to the commit message
  16 u,utf8          recode into utf8 (default)
  17 k,keep          pass -k flagg to git-mailinfo
  18 whitespace=     pass it through git-apply
  19 C=              pass it through git-apply
  20 p=              pass it through git-apply
  21 resolvemsg=     override error message when patch failure occurs
  22 r,resolved      to be used after a patch failure
  23 skip            skip the current patch"
  24
  25 . git-sh-setup
  26 set_reflog_action am
  27 require_work_tree
  28
  29 git var GIT_COMMITTER_IDENT >/dev/null || exit
  30
  31 stop_here () {
  32     echo "$1" >"$dotest/next"
  33     exit 1
  34 }
  35
  36 stop_here_user_resolve () {
  37     if [ -n "$resolvemsg" ]; then
  38             printf '%s\n' "$resolvemsg"
  39             stop_here $1
  40     fi
  41     cmdline=$(basename $0)
  42     if test '' != "$interactive"
  43     then
  44         cmdline="$cmdline -i"
  45     fi
  46     if test '' != "$threeway"
  47     then
  48         cmdline="$cmdline -3"
  49     fi
  50     if test '.dotest' != "$dotest"
  51     then
  52         cmdline="$cmdline -d=$dotest"
  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 prec=4
 121 dotest=.dotest sign= utf8=t keep= skip= interactive= resolved= binary=
 122 resolvemsg= resume=
 123 git_apply_opt=
 124
 125 while test $# != 0
 126 do
 127         case "$1" in
 128         -i|--interactive)
 129                 interactive=t ;;
 130         -b|--binary)
 131                 binary=t ;;
 132         -3|--3way)
 133                 threeway=t ;;
 134         -s|--signoff)
 135                 sign=t ;;
 136         -u|--utf8)
 137                 utf8=t ;; # this is now default
 138         --no-utf8)
 139                 utf8= ;;
 140         -k|--keep)
 141                 keep=t ;;
 142         -r|--resolved)
 143                 resolved=t ;;
 144         --skip)
 145                 skip=t ;;
 146         -d|--dotest)
 147                 shift; dotest=$1;;
 148         --resolvemsg)
 149                 shift; resolvemsg=$1 ;;
 150         --whitespace)
 151                 git_apply_opt="$git_apply_opt $1=$2"; shift ;;
 152         -C|-p)
 153                 git_apply_opt="$git_apply_opt $1$2"; shift ;;
 154         --)
 155                 shift; break ;;
 156         *)
 157                 usage ;;
 158         esac
 159         shift
 160 done
 161
 162 # If the dotest directory exists, but we have finished applying all the
 163 # patches in them, clear it out.
 164 if test -d "$dotest" &&
 165    last=$(cat "$dotest/last") &&
 166    next=$(cat "$dotest/next") &&
 167    test $# != 0 &&
 168    test "$next" -gt "$last"
 169 then
 170    rm -fr "$dotest"
 171 fi
 172
 173 if test -d "$dotest"
 174 then
 175         case "$#,$skip$resolved" in
 176         0,*t*)
 177                 # Explicit resume command and we do not have file, so
 178                 # we are happy.
 179                 : ;;
 180         0,)
 181                 # No file input but without resume parameters; catch
 182                 # user error to feed us a patch from standard input
 183                 # when there is already .dotest.  This is somewhat
 184                 # unreliable -- stdin could be /dev/null for example
 185                 # and the caller did not intend to feed us a patch but
 186                 # wanted to continue unattended.
 187                 tty -s
 188                 ;;
 189         *)
 190                 false
 191                 ;;
 192         esac ||
 193         die "previous dotest directory $dotest still exists but mbox given."
 194         resume=yes
 195 else
 196         # Make sure we are not given --skip nor --resolved
 197         test ",$skip,$resolved," = ,,, ||
 198                 die "Resolve operation not in progress, we are not resuming."
 199
 200         # Start afresh.
 201         mkdir -p "$dotest" || exit
 202
 203         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 204                 rm -fr "$dotest"
 205                 exit 1
 206         }
 207
 208         # -b, -s, -u, -k and --whitespace flags are kept for the
 209         # resuming session after a patch failure.
 210         # -3 and -i can and must be given when resuming.
 211         echo "$binary" >"$dotest/binary"
 212         echo " $ws" >"$dotest/whitespace"
 213         echo "$sign" >"$dotest/sign"
 214         echo "$utf8" >"$dotest/utf8"
 215         echo "$keep" >"$dotest/keep"
 216         echo 1 >"$dotest/next"
 217 fi
 218
 219 case "$resolved" in
 220 '')
 221         files=$(git diff-index --cached --name-only HEAD --) || exit
 222         if [ "$files" ]; then
 223            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 224            exit 1
 225         fi
 226 esac
 227
 228 if test "$(cat "$dotest/binary")" = t
 229 then
 230         binary=--allow-binary-replacement
 231 fi
 232 if test "$(cat "$dotest/utf8")" = t
 233 then
 234         utf8=-u
 235 else
 236         utf8=-n
 237 fi
 238 if test "$(cat "$dotest/keep")" = t
 239 then
 240         keep=-k
 241 fi
 242 ws=`cat "$dotest/whitespace"`
 243 if test "$(cat "$dotest/sign")" = t
 244 then
 245         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 246                         s/>.*/>/
 247                         s/^/Signed-off-by: /'
 248                 `
 249 else
 250         SIGNOFF=
 251 fi
 252
 253 last=`cat "$dotest/last"`
 254 this=`cat "$dotest/next"`
 255 if test "$skip" = t
 256 then
 257         git rerere clear
 258         this=`expr "$this" + 1`
 259         resume=
 260 fi
 261
 262 if test "$this" -gt "$last"
 263 then
 264         echo Nothing to do.
 265         rm -fr "$dotest"
 266         exit
 267 fi
 268
 269 while test "$this" -le "$last"
 270 do
 271         msgnum=`printf "%0${prec}d" $this`
 272         next=`expr "$this" + 1`
 273         test -f "$dotest/$msgnum" || {
 274                 resume=
 275                 go_next
 276                 continue
 277         }
 278
 279         # If we are not resuming, parse and extract the patch information
 280         # into separate files:
 281         #  - info records the authorship and title
 282         #  - msg is the rest of commit log message
 283         #  - patch is the patch body.
 284         #
 285         # When we are resuming, these files are either already prepared
 286         # by the user, or the user can tell us to do so by --resolved flag.
 287         case "$resume" in
 288         '')
 289                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 290                         <"$dotest/$msgnum" >"$dotest/info" ||
 291                         stop_here $this
 292
 293                 # skip pine's internal folder data
 294                 grep '^Author: Mail System Internal Data$' \
 295                         <"$dotest"/info >/dev/null &&
 296                         go_next && continue
 297
 298                 test -s $dotest/patch || {
 299                         echo "Patch is empty.  Was it split wrong?"
 300                         stop_here $this
 301                 }
 302                 git stripspace < "$dotest/msg" > "$dotest/msg-clean"
 303                 ;;
 304         esac
 305
 306         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 307         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 308         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 309
 310         if test -z "$GIT_AUTHOR_EMAIL" || test -z "$GIT_AUTHOR_DATE"
 311         then
 312                 echo "Patch does not have valid authorship information."
 313                 stop_here $this
 314         fi
 315
 316         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 317
 318         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 319         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 320
 321         case "$resume" in
 322         '')
 323             if test '' != "$SIGNOFF"
 324             then
 325                 LAST_SIGNED_OFF_BY=`
 326                     sed -ne '/^Signed-off-by: /p' \
 327                     "$dotest/msg-clean" |
 328                     tail -n 1
 329                 `
 330                 ADD_SIGNOFF=`
 331                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 332                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 333                     echo "$SIGNOFF"
 334                 }`
 335             else
 336                 ADD_SIGNOFF=
 337             fi
 338             {
 339                 printf '%s\n' "$SUBJECT"
 340                 if test -s "$dotest/msg-clean"
 341                 then
 342                         echo
 343                         cat "$dotest/msg-clean"
 344                 fi
 345                 if test '' != "$ADD_SIGNOFF"
 346                 then
 347                         echo "$ADD_SIGNOFF"
 348                 fi
 349             } >"$dotest/final-commit"
 350             ;;
 351         *)
 352                 case "$resolved$interactive" in
 353                 tt)
 354                         # This is used only for interactive view option.
 355                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 356                         ;;
 357                 esac
 358         esac
 359
 360         resume=
 361         if test "$interactive" = t
 362         then
 363             test -t 0 ||
 364             die "cannot be interactive without stdin connected to a terminal."
 365             action=again
 366             while test "$action" = again
 367             do
 368                 echo "Commit Body is:"
 369                 echo "--------------------------"
 370                 cat "$dotest/final-commit"
 371                 echo "--------------------------"
 372                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 373                 read reply
 374                 case "$reply" in
 375                 [yY]*) action=yes ;;
 376                 [aA]*) action=yes interactive= ;;
 377                 [nN]*) action=skip ;;
 378                 [eE]*) git_editor "$dotest/final-commit"
 379                        action=again ;;
 380                 [vV]*) action=again
 381                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 382                 *)     action=again ;;
 383                 esac
 384             done
 385         else
 386             action=yes
 387         fi
 388
 389         if test $action = skip
 390         then
 391                 go_next
 392                 continue
 393         fi
 394
 395         if test -x "$GIT_DIR"/hooks/applypatch-msg
 396         then
 397                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 398                 stop_here $this
 399         fi
 400
 401         printf 'Applying %s\n' "$SUBJECT"
 402
 403         case "$resolved" in
 404         '')
 405                 git apply $git_apply_opt $binary --index "$dotest/patch"
 406                 apply_status=$?
 407                 ;;
 408         t)
 409                 # Resolved means the user did all the hard work, and
 410                 # we do not have to do any patch application.  Just
 411                 # trust what the user has in the index file and the
 412                 # working tree.
 413                 resolved=
 414                 git diff-index --quiet --cached HEAD -- && {
 415                         echo "No changes - did you forget to use 'git add'?"
 416                         stop_here_user_resolve $this
 417                 }
 418                 unmerged=$(git ls-files -u)
 419                 if test -n "$unmerged"
 420                 then
 421                         echo "You still have unmerged paths in your index"
 422                         echo "did you forget to use 'git add'?"
 423                         stop_here_user_resolve $this
 424                 fi
 425                 apply_status=0
 426                 git rerere
 427                 ;;
 428         esac
 429
 430         if test $apply_status = 1 && test "$threeway" = t
 431         then
 432                 if (fall_back_3way)
 433                 then
 434                     # Applying the patch to an earlier tree and merging the
 435                     # result may have produced the same tree as ours.
 436                     git diff-index --quiet --cached HEAD -- && {
 437                         echo No changes -- Patch already applied.
 438                         go_next
 439                         continue
 440                     }
 441                     # clear apply_status -- we have successfully merged.
 442                     apply_status=0
 443                 fi
 444         fi
 445         if test $apply_status != 0
 446         then
 447                 echo Patch failed at $msgnum.
 448                 stop_here_user_resolve $this
 449         fi
 450
 451         if test -x "$GIT_DIR"/hooks/pre-applypatch
 452         then
 453                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 454         fi
 455
 456         tree=$(git write-tree) &&
 457         parent=$(git rev-parse --verify HEAD) &&
 458         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 459         git update-ref -m "$GIT_REFLOG_ACTION: $SUBJECT" HEAD $commit $parent ||
 460         stop_here $this
 461
 462         if test -x "$GIT_DIR"/hooks/post-applypatch
 463         then
 464                 "$GIT_DIR"/hooks/post-applypatch
 465         fi
 466
 467         git gc --auto
 468
 469         go_next
 470 done
 471
 472 rm -fr "$dotest"