git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 USAGE='[--signoff] [--dotest=<dir>] [--utf8 | --no-utf8] [--binary] [--3way]
   6   [--interactive] [--whitespace=<option>] <mbox>...
   7   or, when resuming [--skip | --resolved]'
   8 . git-sh-setup
   9 set_reflog_action am
  10 require_work_tree
  11
  12 git var GIT_COMMITTER_IDENT >/dev/null || exit
  13
  14 stop_here () {
  15     echo "$1" >"$dotest/next"
  16     exit 1
  17 }
  18
  19 stop_here_user_resolve () {
  20     if [ -n "$resolvemsg" ]; then
  21             echo "$resolvemsg"
  22             stop_here $1
  23     fi
  24     cmdline=$(basename $0)
  25     if test '' != "$interactive"
  26     then
  27         cmdline="$cmdline -i"
  28     fi
  29     if test '' != "$threeway"
  30     then
  31         cmdline="$cmdline -3"
  32     fi
  33     if test '.dotest' != "$dotest"
  34     then
  35         cmdline="$cmdline -d=$dotest"
  36     fi
  37     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  38     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  39
  40     stop_here $1
  41 }
  42
  43 go_next () {
  44         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  45                 "$dotest/patch" "$dotest/info"
  46         echo "$next" >"$dotest/next"
  47         this=$next
  48 }
  49
  50 cannot_fallback () {
  51         echo "$1"
  52         echo "Cannot fall back to three-way merge."
  53         exit 1
  54 }
  55
  56 fall_back_3way () {
  57     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  58
  59     rm -fr "$dotest"/patch-merge-*
  60     mkdir "$dotest/patch-merge-tmp-dir"
  61
  62     # First see if the patch records the index info that we can use.
  63     git-apply -z --index-info "$dotest/patch" \
  64         >"$dotest/patch-merge-index-info" &&
  65     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  66     git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
  67     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  68     git-write-tree >"$dotest/patch-merge-base+" ||
  69     cannot_fallback "Patch does not record usable index information."
  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 $his_tree || {
  98             if test -d "$GIT_DIR/rr-cache"
  99             then
 100                 git-rerere
 101             fi
 102             echo Failed to merge in the changes.
 103             exit 1
 104     }
 105     unset GITHEAD_$his_tree
 106 }
 107
 108 prec=4
 109 dotest=.dotest sign= utf8=t keep= skip= interactive= resolved= binary= ws= resolvemsg=
 110
 111 while case "$#" in 0) break;; esac
 112 do
 113         case "$1" in
 114         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 115         dotest=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
 116         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 117         case "$#" in 1) usage ;; esac; shift
 118         dotest="$1"; shift;;
 119
 120         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 121         --interacti|--interactiv|--interactive)
 122         interactive=t; shift ;;
 123
 124         -b|--b|--bi|--bin|--bina|--binar|--binary)
 125         binary=t; shift ;;
 126
 127         -3|--3|--3w|--3wa|--3way)
 128         threeway=t; shift ;;
 129         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 130         sign=t; shift ;;
 131         -u|--u|--ut|--utf|--utf8)
 132         utf8=t; shift ;; # this is now default
 133         --no-u|--no-ut|--no-utf|--no-utf8)
 134         utf8=; shift ;;
 135         -k|--k|--ke|--kee|--keep)
 136         keep=t; shift ;;
 137
 138         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 139         resolved=t; shift ;;
 140
 141         --sk|--ski|--skip)
 142         skip=t; shift ;;
 143
 144         --whitespace=*)
 145         ws=$1; shift ;;
 146
 147         --resolvemsg=*)
 148         resolvemsg=$(echo "$1" | sed -e "s/^--resolvemsg=//"); shift ;;
 149
 150         --)
 151         shift; break ;;
 152         -*)
 153         usage ;;
 154         *)
 155         break ;;
 156         esac
 157 done
 158
 159 # If the dotest directory exists, but we have finished applying all the
 160 # patches in them, clear it out.
 161 if test -d "$dotest" &&
 162    last=$(cat "$dotest/last") &&
 163    next=$(cat "$dotest/next") &&
 164    test $# != 0 &&
 165    test "$next" -gt "$last"
 166 then
 167    rm -fr "$dotest"
 168 fi
 169
 170 if test -d "$dotest"
 171 then
 172         case "$#,$skip$resolved" in
 173         0,*t*)
 174                 # Explicit resume command and we do not have file, so
 175                 # we are happy.
 176                 : ;;
 177         0,)
 178                 # No file input but without resume parameters; catch
 179                 # user error to feed us a patch from standard input
 180                 # when there is already .dotest.  This is somewhat
 181                 # unreliable -- stdin could be /dev/null for example
 182                 # and the caller did not intend to feed us a patch but
 183                 # wanted to continue unattended.
 184                 tty -s
 185                 ;;
 186         *)
 187                 false
 188                 ;;
 189         esac ||
 190         die "previous dotest directory $dotest still exists but mbox given."
 191         resume=yes
 192 else
 193         # Make sure we are not given --skip nor --resolved
 194         test ",$skip,$resolved," = ,,, ||
 195                 die "Resolve operation not in progress, we are not resuming."
 196
 197         # Start afresh.
 198         mkdir -p "$dotest" || exit
 199
 200         git-mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 201                 rm -fr "$dotest"
 202                 exit 1
 203         }
 204
 205         # -b, -s, -u, -k and --whitespace flags are kept for the
 206         # resuming session after a patch failure.
 207         # -3 and -i can and must be given when resuming.
 208         echo "$binary" >"$dotest/binary"
 209         echo " $ws" >"$dotest/whitespace"
 210         echo "$sign" >"$dotest/sign"
 211         echo "$utf8" >"$dotest/utf8"
 212         echo "$keep" >"$dotest/keep"
 213         echo 1 >"$dotest/next"
 214 fi
 215
 216 case "$resolved" in
 217 '')
 218         files=$(git-diff-index --cached --name-only HEAD) || exit
 219         if [ "$files" ]; then
 220            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 221            exit 1
 222         fi
 223 esac
 224
 225 if test "$(cat "$dotest/binary")" = t
 226 then
 227         binary=--allow-binary-replacement
 228 fi
 229 if test "$(cat "$dotest/utf8")" = t
 230 then
 231         utf8=-u
 232 else
 233         utf8=-n
 234 fi
 235 if test "$(cat "$dotest/keep")" = t
 236 then
 237         keep=-k
 238 fi
 239 ws=`cat "$dotest/whitespace"`
 240 if test "$(cat "$dotest/sign")" = t
 241 then
 242         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 243                         s/>.*/>/
 244                         s/^/Signed-off-by: /'
 245                 `
 246 else
 247         SIGNOFF=
 248 fi
 249
 250 last=`cat "$dotest/last"`
 251 this=`cat "$dotest/next"`
 252 if test "$skip" = t
 253 then
 254         if test -d "$GIT_DIR/rr-cache"
 255         then
 256                 git-rerere clear
 257         fi
 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 $this
 292                 git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 293                 ;;
 294         esac
 295
 296         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 297         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 298         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 299
 300         if test -z "$GIT_AUTHOR_EMAIL"
 301         then
 302                 echo "Patch does not have a valid e-mail address."
 303                 stop_here $this
 304         fi
 305
 306         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 307
 308         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 309         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 310
 311         case "$resume" in
 312         '')
 313             if test '' != "$SIGNOFF"
 314             then
 315                 LAST_SIGNED_OFF_BY=`
 316                     sed -ne '/^Signed-off-by: /p' \
 317                     "$dotest/msg-clean" |
 318                     tail -n 1
 319                 `
 320                 ADD_SIGNOFF=`
 321                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 322                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 323                     echo "$SIGNOFF"
 324                 }`
 325             else
 326                 ADD_SIGNOFF=
 327             fi
 328             {
 329                 echo "$SUBJECT"
 330                 if test -s "$dotest/msg-clean"
 331                 then
 332                         echo
 333                         cat "$dotest/msg-clean"
 334                 fi
 335                 if test '' != "$ADD_SIGNOFF"
 336                 then
 337                         echo "$ADD_SIGNOFF"
 338                 fi
 339             } >"$dotest/final-commit"
 340             ;;
 341         *)
 342                 case "$resolved$interactive" in
 343                 tt)
 344                         # This is used only for interactive view option.
 345                         git-diff-index -p --cached HEAD >"$dotest/patch"
 346                         ;;
 347                 esac
 348         esac
 349
 350         resume=
 351         if test "$interactive" = t
 352         then
 353             test -t 0 ||
 354             die "cannot be interactive without stdin connected to a terminal."
 355             action=again
 356             while test "$action" = again
 357             do
 358                 echo "Commit Body is:"
 359                 echo "--------------------------"
 360                 cat "$dotest/final-commit"
 361                 echo "--------------------------"
 362                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 363                 read reply
 364                 case "$reply" in
 365                 [yY]*) action=yes ;;
 366                 [aA]*) action=yes interactive= ;;
 367                 [nN]*) action=skip ;;
 368                 [eE]*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 369                        action=again ;;
 370                 [vV]*) action=again
 371                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 372                 *)     action=again ;;
 373                 esac
 374             done
 375         else
 376             action=yes
 377         fi
 378
 379         if test $action = skip
 380         then
 381                 go_next
 382                 continue
 383         fi
 384
 385         if test -x "$GIT_DIR"/hooks/applypatch-msg
 386         then
 387                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 388                 stop_here $this
 389         fi
 390
 391         echo
 392         echo "Applying '$SUBJECT'"
 393         echo
 394
 395         case "$resolved" in
 396         '')
 397                 git-apply $binary --index $ws "$dotest/patch"
 398                 apply_status=$?
 399                 ;;
 400         t)
 401                 # Resolved means the user did all the hard work, and
 402                 # we do not have to do any patch application.  Just
 403                 # trust what the user has in the index file and the
 404                 # working tree.
 405                 resolved=
 406                 changed="$(git-diff-index --cached --name-only HEAD)"
 407                 if test '' = "$changed"
 408                 then
 409                         echo "No changes - did you forget to use 'git add'?"
 410                         stop_here_user_resolve $this
 411                 fi
 412                 unmerged=$(git-ls-files -u)
 413                 if test -n "$unmerged"
 414                 then
 415                         echo "You still have unmerged paths in your index"
 416                         echo "did you forget to use 'git add'?"
 417                         stop_here_user_resolve $this
 418                 fi
 419                 apply_status=0
 420                 if test -d "$GIT_DIR/rr-cache"
 421                 then
 422                         git rerere
 423                 fi
 424                 ;;
 425         esac
 426
 427         if test $apply_status = 1 && test "$threeway" = t
 428         then
 429                 if (fall_back_3way)
 430                 then
 431                     # Applying the patch to an earlier tree and merging the
 432                     # result may have produced the same tree as ours.
 433                     changed="$(git-diff-index --cached --name-only HEAD)"
 434                     if test '' = "$changed"
 435                     then
 436                             echo No changes -- Patch already applied.
 437                             go_next
 438                             continue
 439                     fi
 440                     # clear apply_status -- we have successfully merged.
 441                     apply_status=0
 442                 fi
 443         fi
 444         if test $apply_status != 0
 445         then
 446                 echo Patch failed at $msgnum.
 447                 stop_here_user_resolve $this
 448         fi
 449
 450         if test -x "$GIT_DIR"/hooks/pre-applypatch
 451         then
 452                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 453         fi
 454
 455         tree=$(git-write-tree) &&
 456         echo Wrote tree $tree &&
 457         parent=$(git-rev-parse --verify HEAD) &&
 458         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 459         echo Committed: $commit &&
 460         git-update-ref -m "$GIT_REFLOG_ACTION: $SUBJECT" HEAD $commit $parent ||
 461         stop_here $this
 462
 463         if test -x "$GIT_DIR"/hooks/post-applypatch
 464         then
 465                 "$GIT_DIR"/hooks/post-applypatch
 466         fi
 467
 468         go_next
 469 done
 470
 471 rm -fr "$dotest"