git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 USAGE='[--signoff] [--dotest=<dir>] [--utf8] [--binary] [--3way]
   6   [--interactive] [--whitespace=<option>] <mbox>...
   7   or, when resuming [--skip | --resolved]'
   8 . git-sh-setup
   9
  10 git var GIT_COMMITTER_IDENT >/dev/null || exit
  11
  12 stop_here () {
  13     echo "$1" >"$dotest/next"
  14     exit 1
  15 }
  16
  17 stop_here_user_resolve () {
  18     if [ -n "$resolvemsg" ]; then
  19             echo "$resolvemsg"
  20             stop_here $1
  21     fi
  22     cmdline=$(basename $0)
  23     if test '' != "$interactive"
  24     then
  25         cmdline="$cmdline -i"
  26     fi
  27     if test '' != "$threeway"
  28     then
  29         cmdline="$cmdline -3"
  30     fi
  31     if test '.dotest' != "$dotest"
  32     then
  33         cmdline="$cmdline -d=$dotest"
  34     fi
  35     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  36     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  37
  38     stop_here $1
  39 }
  40
  41 go_next () {
  42         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  43                 "$dotest/patch" "$dotest/info"
  44         echo "$next" >"$dotest/next"
  45         this=$next
  46 }
  47
  48 fall_back_3way () {
  49     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  50
  51     rm -fr "$dotest"/patch-merge-*
  52     mkdir "$dotest/patch-merge-tmp-dir"
  53
  54     # First see if the patch records the index info that we can use.
  55     if git-apply -z --index-info "$dotest/patch" \
  56         >"$dotest/patch-merge-index-info" 2>/dev/null &&
  57         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  58         git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
  59         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  60         git-write-tree >"$dotest/patch-merge-base+" &&
  61         # index has the base tree now.
  62         (
  63             cd "$dotest/patch-merge-tmp-dir" &&
  64             GIT_INDEX_FILE="../patch-merge-tmp-index" \
  65             GIT_OBJECT_DIRECTORY="$O_OBJECT" \
  66             git-apply $binary --index <../patch
  67         )
  68     then
  69         echo Using index info to reconstruct a base tree...
  70         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  71         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  72     else
  73         # Otherwise, try nearby trees that can be used to apply the
  74         # patch.
  75         (
  76             N=10
  77
  78             # Hoping the patch is against our recent commits...
  79             git-rev-list --max-count=$N HEAD
  80
  81             # or hoping the patch is against known tags...
  82             git-ls-remote --tags .
  83         ) |
  84         while read base junk
  85         do
  86             # See if we have it as a tree...
  87             git-cat-file tree "$base" >/dev/null 2>&1 || continue
  88
  89             rm -fr "$dotest"/patch-merge-* &&
  90             mkdir "$dotest/patch-merge-tmp-dir" || break
  91             (
  92                 cd "$dotest/patch-merge-tmp-dir" &&
  93                 GIT_INDEX_FILE=../patch-merge-tmp-index &&
  94                 GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
  95                 export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
  96                 git-read-tree "$base" &&
  97                 git-apply $binary --index &&
  98                 mv ../patch-merge-tmp-index ../patch-merge-index &&
  99                 echo "$base" >../patch-merge-base
 100             ) <"$dotest/patch"  2>/dev/null && break
 101         done
 102     fi
 103
 104     test -f "$dotest/patch-merge-index" &&
 105     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
 106     orig_tree=$(cat "$dotest/patch-merge-base") &&
 107     rm -fr "$dotest"/patch-merge-* || exit 1
 108
 109     echo Falling back to patching base and 3-way merge...
 110
 111     # This is not so wrong.  Depending on which base we picked,
 112     # orig_tree may be wildly different from ours, but his_tree
 113     # has the same set of wildly different changes in parts the
 114     # patch did not touch, so resolve ends up cancelling them,
 115     # saying that we reverted all those changes.
 116
 117     git-merge-resolve $orig_tree -- HEAD $his_tree || {
 118             if test -d "$GIT_DIR/rr-cache"
 119             then
 120                 git-rerere
 121             fi
 122             echo Failed to merge in the changes.
 123             exit 1
 124     }
 125 }
 126
 127 prec=4
 128 dotest=.dotest sign= utf8= keep= skip= interactive= resolved= binary= ws= resolvemsg=
 129
 130 while case "$#" in 0) break;; esac
 131 do
 132         case "$1" in
 133         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 134         dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
 135         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 136         case "$#" in 1) usage ;; esac; shift
 137         dotest="$1"; shift;;
 138
 139         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 140         --interacti|--interactiv|--interactive)
 141         interactive=t; shift ;;
 142
 143         -b|--b|--bi|--bin|--bina|--binar|--binary)
 144         binary=t; shift ;;
 145
 146         -3|--3|--3w|--3wa|--3way)
 147         threeway=t; shift ;;
 148         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 149         sign=t; shift ;;
 150         -u|--u|--ut|--utf|--utf8)
 151         utf8=t; shift ;;
 152         -k|--k|--ke|--kee|--keep)
 153         keep=t; shift ;;
 154
 155         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 156         resolved=t; shift ;;
 157
 158         --sk|--ski|--skip)
 159         skip=t; shift ;;
 160
 161         --whitespace=*)
 162         ws=$1; shift ;;
 163
 164         --resolvemsg=*)
 165         resolvemsg=$(echo "$1" | sed -e "s/^--resolvemsg=//"); shift ;;
 166
 167         --)
 168         shift; break ;;
 169         -*)
 170         usage ;;
 171         *)
 172         break ;;
 173         esac
 174 done
 175
 176 # If the dotest directory exists, but we have finished applying all the
 177 # patches in them, clear it out.
 178 if test -d "$dotest" &&
 179    last=$(cat "$dotest/last") &&
 180    next=$(cat "$dotest/next") &&
 181    test $# != 0 &&
 182    test "$next" -gt "$last"
 183 then
 184    rm -fr "$dotest"
 185 fi
 186
 187 if test -d "$dotest"
 188 then
 189         test ",$#," = ",0," ||
 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 "$dotest/utf8")" = t
 230 then
 231         utf8=-u
 232 fi
 233 if test "$(cat "$dotest/keep")" = t
 234 then
 235         keep=-k
 236 fi
 237 ws=`cat "$dotest/whitespace"`
 238 if test "$(cat "$dotest/sign")" = t
 239 then
 240         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 241                         s/>.*/>/
 242                         s/^/Signed-off-by: /'
 243                 `
 244 else
 245         SIGNOFF=
 246 fi
 247
 248 last=`cat "$dotest/last"`
 249 this=`cat "$dotest/next"`
 250 if test "$skip" = t
 251 then
 252         this=`expr "$this" + 1`
 253         resume=
 254 fi
 255
 256 if test "$this" -gt "$last"
 257 then
 258         echo Nothing to do.
 259         rm -fr "$dotest"
 260         exit
 261 fi
 262
 263 while test "$this" -le "$last"
 264 do
 265         msgnum=`printf "%0${prec}d" $this`
 266         next=`expr "$this" + 1`
 267         test -f "$dotest/$msgnum" || {
 268                 resume=
 269                 go_next
 270                 continue
 271         }
 272
 273         # If we are not resuming, parse and extract the patch information
 274         # into separate files:
 275         #  - info records the authorship and title
 276         #  - msg is the rest of commit log message
 277         #  - patch is the patch body.
 278         #
 279         # When we are resuming, these files are either already prepared
 280         # by the user, or the user can tell us to do so by --resolved flag.
 281         case "$resume" in
 282         '')
 283                 git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 284                         <"$dotest/$msgnum" >"$dotest/info" ||
 285                         stop_here $this
 286                 git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 287                 ;;
 288         esac
 289
 290         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 291         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 292         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 293
 294         if test -z "$GIT_AUTHOR_EMAIL"
 295         then
 296                 echo "Patch does not have a valid e-mail address."
 297                 stop_here $this
 298         fi
 299
 300         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 301
 302         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 303         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 304
 305         case "$resume" in
 306         '')
 307             if test '' != "$SIGNOFF"
 308             then
 309                 LAST_SIGNED_OFF_BY=`
 310                     sed -ne '/^Signed-off-by: /p' \
 311                     "$dotest/msg-clean" |
 312                     tail -n 1
 313                 `
 314                 ADD_SIGNOFF=`
 315                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 316                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 317                     echo "$SIGNOFF"
 318                 }`
 319             else
 320                 ADD_SIGNOFF=
 321             fi
 322             {
 323                 echo "$SUBJECT"
 324                 if test -s "$dotest/msg-clean"
 325                 then
 326                         echo
 327                         cat "$dotest/msg-clean"
 328                 fi
 329                 if test '' != "$ADD_SIGNOFF"
 330                 then
 331                         echo "$ADD_SIGNOFF"
 332                 fi
 333             } >"$dotest/final-commit"
 334             ;;
 335         *)
 336                 case "$resolved$interactive" in
 337                 tt)
 338                         # This is used only for interactive view option.
 339                         git-diff-index -p --cached HEAD >"$dotest/patch"
 340                         ;;
 341                 esac
 342         esac
 343
 344         resume=
 345         if test "$interactive" = t
 346         then
 347             test -t 0 ||
 348             die "cannot be interactive without stdin connected to a terminal."
 349             action=again
 350             while test "$action" = again
 351             do
 352                 echo "Commit Body is:"
 353                 echo "--------------------------"
 354                 cat "$dotest/final-commit"
 355                 echo "--------------------------"
 356                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 357                 read reply
 358                 case "$reply" in
 359                 [yY]*) action=yes ;;
 360                 [aA]*) action=yes interactive= ;;
 361                 [nN]*) action=skip ;;
 362                 [eE]*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 363                        action=again ;;
 364                 [vV]*) action=again
 365                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 366                 *)     action=again ;;
 367                 esac
 368             done
 369         else
 370             action=yes
 371         fi
 372
 373         if test $action = skip
 374         then
 375                 go_next
 376                 continue
 377         fi
 378
 379         if test -x "$GIT_DIR"/hooks/applypatch-msg
 380         then
 381                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 382                 stop_here $this
 383         fi
 384
 385         echo
 386         echo "Applying '$SUBJECT'"
 387         echo
 388
 389         case "$resolved" in
 390         '')
 391                 git-apply $binary --index $ws "$dotest/patch"
 392                 apply_status=$?
 393                 ;;
 394         t)
 395                 # Resolved means the user did all the hard work, and
 396                 # we do not have to do any patch application.  Just
 397                 # trust what the user has in the index file and the
 398                 # working tree.
 399                 resolved=
 400                 changed="$(git-diff-index --cached --name-only HEAD)"
 401                 if test '' = "$changed"
 402                 then
 403                         echo "No changes - did you forget update-index?"
 404                         stop_here_user_resolve $this
 405                 fi
 406                 unmerged=$(git-ls-files -u)
 407                 if test -n "$unmerged"
 408                 then
 409                         echo "You still have unmerged paths in your index"
 410                         echo "did you forget update-index?"
 411                         stop_here_user_resolve $this
 412                 fi
 413                 apply_status=0
 414                 ;;
 415         esac
 416
 417         if test $apply_status = 1 && test "$threeway" = t
 418         then
 419                 if (fall_back_3way)
 420                 then
 421                     # Applying the patch to an earlier tree and merging the
 422                     # result may have produced the same tree as ours.
 423                     changed="$(git-diff-index --cached --name-only HEAD)"
 424                     if test '' = "$changed"
 425                     then
 426                             echo No changes -- Patch already applied.
 427                             go_next
 428                             continue
 429                     fi
 430                     # clear apply_status -- we have successfully merged.
 431                     apply_status=0
 432                 fi
 433         fi
 434         if test $apply_status != 0
 435         then
 436                 echo Patch failed at $msgnum.
 437                 stop_here_user_resolve $this
 438         fi
 439
 440         if test -x "$GIT_DIR"/hooks/pre-applypatch
 441         then
 442                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 443         fi
 444
 445         tree=$(git-write-tree) &&
 446         echo Wrote tree $tree &&
 447         parent=$(git-rev-parse --verify HEAD) &&
 448         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 449         echo Committed: $commit &&
 450         git-update-ref -m "am: $SUBJECT" HEAD $commit $parent ||
 451         stop_here $this
 452
 453         if test -x "$GIT_DIR"/hooks/post-applypatch
 454         then
 455                 "$GIT_DIR"/hooks/post-applypatch
 456         fi
 457
 458         go_next
 459 done
 460
 461 rm -fr "$dotest"