git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 USAGE='[--signoff] [--dotest=<dir>] [--keep] [--utf8 | --no-utf8]
   6   [--3way] [--interactive] [--binary]
   7   [--whitespace=<option>] [-C<n>] [-p<n>]
   8   <mbox>|<Maildir>...
   9   or, when resuming [--skip | --resolved]'
  10 . git-sh-setup
  11 set_reflog_action am
  12 require_work_tree
  13
  14 git var GIT_COMMITTER_IDENT >/dev/null || exit
  15
  16 stop_here () {
  17     echo "$1" >"$dotest/next"
  18     exit 1
  19 }
  20
  21 stop_here_user_resolve () {
  22     if [ -n "$resolvemsg" ]; then
  23             printf '%s\n' "$resolvemsg"
  24             stop_here $1
  25     fi
  26     cmdline=$(basename $0)
  27     if test '' != "$interactive"
  28     then
  29         cmdline="$cmdline -i"
  30     fi
  31     if test '' != "$threeway"
  32     then
  33         cmdline="$cmdline -3"
  34     fi
  35     if test '.dotest' != "$dotest"
  36     then
  37         cmdline="$cmdline -d=$dotest"
  38     fi
  39     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  40     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  41
  42     stop_here $1
  43 }
  44
  45 go_next () {
  46         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  47                 "$dotest/patch" "$dotest/info"
  48         echo "$next" >"$dotest/next"
  49         this=$next
  50 }
  51
  52 cannot_fallback () {
  53         echo "$1"
  54         echo "Cannot fall back to three-way merge."
  55         exit 1
  56 }
  57
  58 fall_back_3way () {
  59     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  60
  61     rm -fr "$dotest"/patch-merge-*
  62     mkdir "$dotest/patch-merge-tmp-dir"
  63
  64     # First see if the patch records the index info that we can use.
  65     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  66         "$dotest/patch" &&
  67     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  68     git write-tree >"$dotest/patch-merge-base+" ||
  69     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  70
  71     echo Using index info to reconstruct a base tree...
  72     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  73         git apply $binary --cached <"$dotest/patch"
  74     then
  75         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  76         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  77     else
  78         cannot_fallback "Did you hand edit your patch?
  79 It does not apply to blobs recorded in its index."
  80     fi
  81
  82     test -f "$dotest/patch-merge-index" &&
  83     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
  84     orig_tree=$(cat "$dotest/patch-merge-base") &&
  85     rm -fr "$dotest"/patch-merge-* || exit 1
  86
  87     echo Falling back to patching base and 3-way merge...
  88
  89     # This is not so wrong.  Depending on which base we picked,
  90     # orig_tree may be wildly different from ours, but his_tree
  91     # has the same set of wildly different changes in parts the
  92     # patch did not touch, so recursive ends up canceling them,
  93     # saying that we reverted all those changes.
  94
  95     eval GITHEAD_$his_tree='"$SUBJECT"'
  96     export GITHEAD_$his_tree
  97     git-merge-recursive $orig_tree -- HEAD $his_tree || {
  98             git rerere
  99             echo Failed to merge in the changes.
 100             exit 1
 101     }
 102     unset GITHEAD_$his_tree
 103 }
 104
 105 prec=4
 106 dotest=.dotest sign= utf8=t keep= skip= interactive= resolved= binary=
 107 resolvemsg= resume=
 108 git_apply_opt=
 109
 110 while test $# != 0
 111 do
 112         case "$1" in
 113         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 114         dotest=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
 115         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 116         case "$#" in 1) usage ;; esac; shift
 117         dotest="$1"; shift;;
 118
 119         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 120         --interacti|--interactiv|--interactive)
 121         interactive=t; shift ;;
 122
 123         -b|--b|--bi|--bin|--bina|--binar|--binary)
 124         binary=t; shift ;;
 125
 126         -3|--3|--3w|--3wa|--3way)
 127         threeway=t; shift ;;
 128         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 129         sign=t; shift ;;
 130         -u|--u|--ut|--utf|--utf8)
 131         utf8=t; shift ;; # this is now default
 132         --no-u|--no-ut|--no-utf|--no-utf8)
 133         utf8=; shift ;;
 134         -k|--k|--ke|--kee|--keep)
 135         keep=t; shift ;;
 136
 137         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 138         resolved=t; shift ;;
 139
 140         --sk|--ski|--skip)
 141         skip=t; shift ;;
 142
 143         --whitespace=*|-C*|-p*)
 144         git_apply_opt="$git_apply_opt $1"; shift ;;
 145
 146         --resolvemsg=*)
 147         resolvemsg=${1#--resolvemsg=}; shift ;;
 148
 149         --)
 150         shift; break ;;
 151         -*)
 152         usage ;;
 153         *)
 154         break ;;
 155         esac
 156 done
 157
 158 # If the dotest directory exists, but we have finished applying all the
 159 # patches in them, clear it out.
 160 if test -d "$dotest" &&
 161    last=$(cat "$dotest/last") &&
 162    next=$(cat "$dotest/next") &&
 163    test $# != 0 &&
 164    test "$next" -gt "$last"
 165 then
 166    rm -fr "$dotest"
 167 fi
 168
 169 if test -d "$dotest"
 170 then
 171         case "$#,$skip$resolved" in
 172         0,*t*)
 173                 # Explicit resume command and we do not have file, so
 174                 # we are happy.
 175                 : ;;
 176         0,)
 177                 # No file input but without resume parameters; catch
 178                 # user error to feed us a patch from standard input
 179                 # when there is already .dotest.  This is somewhat
 180                 # unreliable -- stdin could be /dev/null for example
 181                 # and the caller did not intend to feed us a patch but
 182                 # wanted to continue unattended.
 183                 tty -s
 184                 ;;
 185         *)
 186                 false
 187                 ;;
 188         esac ||
 189         die "previous dotest directory $dotest still exists but mbox given."
 190         resume=yes
 191 else
 192         # Make sure we are not given --skip nor --resolved
 193         test ",$skip,$resolved," = ,,, ||
 194                 die "Resolve operation not in progress, we are not resuming."
 195
 196         # Start afresh.
 197         mkdir -p "$dotest" || exit
 198
 199         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 200                 rm -fr "$dotest"
 201                 exit 1
 202         }
 203
 204         # -b, -s, -u, -k and --whitespace flags are kept for the
 205         # resuming session after a patch failure.
 206         # -3 and -i can and must be given when resuming.
 207         echo "$binary" >"$dotest/binary"
 208         echo " $ws" >"$dotest/whitespace"
 209         echo "$sign" >"$dotest/sign"
 210         echo "$utf8" >"$dotest/utf8"
 211         echo "$keep" >"$dotest/keep"
 212         echo 1 >"$dotest/next"
 213 fi
 214
 215 case "$resolved" in
 216 '')
 217         files=$(git diff-index --cached --name-only HEAD) || exit
 218         if [ "$files" ]; then
 219            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 220            exit 1
 221         fi
 222 esac
 223
 224 if test "$(cat "$dotest/binary")" = t
 225 then
 226         binary=--allow-binary-replacement
 227 fi
 228 if test "$(cat "$dotest/utf8")" = t
 229 then
 230         utf8=-u
 231 else
 232         utf8=-n
 233 fi
 234 if test "$(cat "$dotest/keep")" = t
 235 then
 236         keep=-k
 237 fi
 238 ws=`cat "$dotest/whitespace"`
 239 if test "$(cat "$dotest/sign")" = t
 240 then
 241         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 242                         s/>.*/>/
 243                         s/^/Signed-off-by: /'
 244                 `
 245 else
 246         SIGNOFF=
 247 fi
 248
 249 last=`cat "$dotest/last"`
 250 this=`cat "$dotest/next"`
 251 if test "$skip" = t
 252 then
 253         git rerere clear
 254         this=`expr "$this" + 1`
 255         resume=
 256 fi
 257
 258 if test "$this" -gt "$last"
 259 then
 260         echo Nothing to do.
 261         rm -fr "$dotest"
 262         exit
 263 fi
 264
 265 while test "$this" -le "$last"
 266 do
 267         msgnum=`printf "%0${prec}d" $this`
 268         next=`expr "$this" + 1`
 269         test -f "$dotest/$msgnum" || {
 270                 resume=
 271                 go_next
 272                 continue
 273         }
 274
 275         # If we are not resuming, parse and extract the patch information
 276         # into separate files:
 277         #  - info records the authorship and title
 278         #  - msg is the rest of commit log message
 279         #  - patch is the patch body.
 280         #
 281         # When we are resuming, these files are either already prepared
 282         # by the user, or the user can tell us to do so by --resolved flag.
 283         case "$resume" in
 284         '')
 285                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 286                         <"$dotest/$msgnum" >"$dotest/info" ||
 287                         stop_here $this
 288
 289                 # skip pine's internal folder data
 290                 grep '^Author: Mail System Internal Data$' \
 291                         <"$dotest"/info >/dev/null &&
 292                         go_next && continue
 293
 294                 test -s $dotest/patch || {
 295                         echo "Patch is empty.  Was it split wrong?"
 296                         stop_here $this
 297                 }
 298                 git stripspace < "$dotest/msg" > "$dotest/msg-clean"
 299                 ;;
 300         esac
 301
 302         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 303         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 304         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 305
 306         if test -z "$GIT_AUTHOR_EMAIL"
 307         then
 308                 echo "Patch does not have a valid e-mail address."
 309                 stop_here $this
 310         fi
 311
 312         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 313
 314         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 315         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 316
 317         case "$resume" in
 318         '')
 319             if test '' != "$SIGNOFF"
 320             then
 321                 LAST_SIGNED_OFF_BY=`
 322                     sed -ne '/^Signed-off-by: /p' \
 323                     "$dotest/msg-clean" |
 324                     tail -n 1
 325                 `
 326                 ADD_SIGNOFF=`
 327                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 328                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 329                     echo "$SIGNOFF"
 330                 }`
 331             else
 332                 ADD_SIGNOFF=
 333             fi
 334             {
 335                 printf '%s\n' "$SUBJECT"
 336                 if test -s "$dotest/msg-clean"
 337                 then
 338                         echo
 339                         cat "$dotest/msg-clean"
 340                 fi
 341                 if test '' != "$ADD_SIGNOFF"
 342                 then
 343                         echo "$ADD_SIGNOFF"
 344                 fi
 345             } >"$dotest/final-commit"
 346             ;;
 347         *)
 348                 case "$resolved$interactive" in
 349                 tt)
 350                         # This is used only for interactive view option.
 351                         git diff-index -p --cached HEAD >"$dotest/patch"
 352                         ;;
 353                 esac
 354         esac
 355
 356         resume=
 357         if test "$interactive" = t
 358         then
 359             test -t 0 ||
 360             die "cannot be interactive without stdin connected to a terminal."
 361             action=again
 362             while test "$action" = again
 363             do
 364                 echo "Commit Body is:"
 365                 echo "--------------------------"
 366                 cat "$dotest/final-commit"
 367                 echo "--------------------------"
 368                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 369                 read reply
 370                 case "$reply" in
 371                 [yY]*) action=yes ;;
 372                 [aA]*) action=yes interactive= ;;
 373                 [nN]*) action=skip ;;
 374                 [eE]*) git_editor "$dotest/final-commit"
 375                        action=again ;;
 376                 [vV]*) action=again
 377                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 378                 *)     action=again ;;
 379                 esac
 380             done
 381         else
 382             action=yes
 383         fi
 384
 385         if test $action = skip
 386         then
 387                 go_next
 388                 continue
 389         fi
 390
 391         if test -x "$GIT_DIR"/hooks/applypatch-msg
 392         then
 393                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 394                 stop_here $this
 395         fi
 396
 397         echo
 398         printf 'Applying %s\n' "$SUBJECT"
 399         echo
 400
 401         case "$resolved" in
 402         '')
 403                 git apply $git_apply_opt $binary --index "$dotest/patch"
 404                 apply_status=$?
 405                 ;;
 406         t)
 407                 # Resolved means the user did all the hard work, and
 408                 # we do not have to do any patch application.  Just
 409                 # trust what the user has in the index file and the
 410                 # working tree.
 411                 resolved=
 412                 git diff-index --quiet --cached HEAD && {
 413                         echo "No changes - did you forget to use 'git add'?"
 414                         stop_here_user_resolve $this
 415                 }
 416                 unmerged=$(git ls-files -u)
 417                 if test -n "$unmerged"
 418                 then
 419                         echo "You still have unmerged paths in your index"
 420                         echo "did you forget to use 'git add'?"
 421                         stop_here_user_resolve $this
 422                 fi
 423                 apply_status=0
 424                 git rerere
 425                 ;;
 426         esac
 427
 428         if test $apply_status = 1 && test "$threeway" = t
 429         then
 430                 if (fall_back_3way)
 431                 then
 432                     # Applying the patch to an earlier tree and merging the
 433                     # result may have produced the same tree as ours.
 434                     git diff-index --quiet --cached HEAD && {
 435                         echo No changes -- Patch already applied.
 436                         go_next
 437                         continue
 438                     }
 439                     # clear apply_status -- we have successfully merged.
 440                     apply_status=0
 441                 fi
 442         fi
 443         if test $apply_status != 0
 444         then
 445                 echo Patch failed at $msgnum.
 446                 stop_here_user_resolve $this
 447         fi
 448
 449         if test -x "$GIT_DIR"/hooks/pre-applypatch
 450         then
 451                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 452         fi
 453
 454         tree=$(git write-tree) &&
 455         echo Wrote tree $tree &&
 456         parent=$(git rev-parse --verify HEAD) &&
 457         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 458         echo Committed: $commit &&
 459         git update-ref -m "$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"