git-am.sh

   1 #!/bin/sh
   2 #
   3 #
   4 . git-sh-setup || die "Not a git archive"
   5
   6 usage () {
   7     echo >&2 "usage: $0 [--signoff] [--dotest=<dir>] [--utf8] [--3way] <mbox>"
   8     echo >&2 "  or, when resuming"
   9     echo >&2 "  $0 [--skip | --resolved]"
  10     exit 1;
  11 }
  12
  13 stop_here () {
  14     echo "$1" >"$dotest/next"
  15     exit 1
  16 }
  17
  18 go_next () {
  19         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  20                 "$dotest/patch" "$dotest/info"
  21         echo "$next" >"$dotest/next"
  22         this=$next
  23 }
  24
  25 fall_back_3way () {
  26     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  27
  28     rm -fr "$dotest"/patch-merge-*
  29     mkdir "$dotest/patch-merge-tmp-dir"
  30
  31     # First see if the patch records the index info that we can use.
  32     if git-apply -z --index-info "$dotest/patch" \
  33         >"$dotest/patch-merge-index-info" 2>/dev/null &&
  34         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  35         git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
  36         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  37         git-write-tree >"$dotest/patch-merge-base+" &&
  38         # index has the base tree now.
  39         (
  40             cd "$dotest/patch-merge-tmp-dir" &&
  41             GIT_INDEX_FILE="../patch-merge-tmp-index" \
  42             GIT_OBJECT_DIRECTORY="$O_OBJECT" \
  43             git-apply --index <../patch
  44         )
  45     then
  46         echo Using index info to reconstruct a base tree...
  47         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  48         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  49     else
  50         # Otherwise, try nearby trees that can be used to apply the
  51         # patch.
  52         (
  53             N=10
  54
  55             # Hoping the patch is against our recent commits...
  56             git-rev-list --max-count=$N HEAD
  57
  58             # or hoping the patch is against known tags...
  59             git-ls-remote --tags .
  60         ) |
  61         while read base junk
  62         do
  63             # See if we have it as a tree...
  64             git-cat-file tree "$base" >/dev/null 2>&1 || continue
  65
  66             rm -fr "$dotest"/patch-merge-* &&
  67             mkdir "$dotest/patch-merge-tmp-dir" || break
  68             (
  69                 cd "$dotest/patch-merge-tmp-dir" &&
  70                 GIT_INDEX_FILE=../patch-merge-tmp-index &&
  71                 GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
  72                 export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
  73                 git-read-tree "$base" &&
  74                 git-apply --index &&
  75                 mv ../patch-merge-tmp-index ../patch-merge-index &&
  76                 echo "$base" >../patch-merge-base
  77             ) <"$dotest/patch"  2>/dev/null && break
  78         done
  79     fi
  80
  81     test -f "$dotest/patch-merge-index" &&
  82     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
  83     orig_tree=$(cat "$dotest/patch-merge-base") &&
  84     rm -fr "$dotest"/patch-merge-* || exit 1
  85
  86     echo Falling back to patching base and 3-way merge...
  87
  88     # This is not so wrong.  Depending on which base we picked,
  89     # orig_tree may be wildly different from ours, but his_tree
  90     # has the same set of wildly different changes in parts the
  91     # patch did not touch, so resolve ends up cancelling them,
  92     # saying that we reverted all those changes.
  93
  94     git-merge-resolve $orig_tree -- HEAD $his_tree || {
  95             echo Failed to merge in the changes.
  96             exit 1
  97     }
  98 }
  99
 100 prec=4
 101 dotest=.dotest sign= utf8= keep= skip= interactive= resolved=
 102
 103 while case "$#" in 0) break;; esac
 104 do
 105         case "$1" in
 106         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 107         dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
 108         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 109         case "$#" in 1) usage ;; esac; shift
 110         dotest="$1"; shift;;
 111
 112         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 113         --interacti|--interactiv|--interactive)
 114         interactive=t; shift ;;
 115
 116         -3|--3|--3w|--3wa|--3way)
 117         threeway=t; shift ;;
 118         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 119         sign=t; shift ;;
 120         -u|--u|--ut|--utf|--utf8)
 121         utf8=t; shift ;;
 122         -k|--k|--ke|--kee|--keep)
 123         keep=t; shift ;;
 124
 125         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 126         resolved=t; shift ;;
 127
 128         --sk|--ski|--skip)
 129         skip=t; shift ;;
 130
 131         --)
 132         shift; break ;;
 133         -*)
 134         usage ;;
 135         *)
 136         break ;;
 137         esac
 138 done
 139
 140 # If the dotest directory exists, but we have finished applying all the
 141 # patches in them, clear it out.
 142 if test -d "$dotest" &&
 143    last=$(cat "$dotest/last") &&
 144    next=$(cat "$dotest/next") &&
 145    test $# != 0 &&
 146    test "$next" -gt "$last"
 147 then
 148    rm -fr "$dotest"
 149 fi
 150
 151 if test -d "$dotest"
 152 then
 153         test ",$#," = ",0," ||
 154         die "previous dotest directory $dotest still exists but mbox given."
 155         resume=yes
 156 else
 157         # Make sure we are not given --skip nor --resolved
 158         test ",$skip,$resolved," = ,,, ||
 159                 die "we are not resuming."
 160
 161         # Start afresh.
 162         mkdir -p "$dotest" || exit
 163
 164         # cat does the right thing for us, including '-' to mean
 165         # standard input.
 166         cat "$@" |
 167         git-mailsplit -d$prec "$dotest/" >"$dotest/last" || {
 168                 rm -fr "$dotest"
 169                 exit 1
 170         }
 171
 172         # -s, -u and -k flags are kept for the resuming session after
 173         # a patch failure.
 174         # -3 and -i can and must be given when resuming.
 175         echo "$sign" >"$dotest/sign"
 176         echo "$utf8" >"$dotest/utf8"
 177         echo "$keep" >"$dotest/keep"
 178         echo 1 >"$dotest/next"
 179 fi
 180
 181 case "$resolved" in
 182 '')
 183         files=$(git-diff-index --cached --name-only HEAD) || exit
 184         if [ "$files" ]; then
 185            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 186            exit 1
 187         fi
 188 esac
 189
 190 if test "$(cat "$dotest/utf8")" = t
 191 then
 192         utf8=-u
 193 fi
 194 if test "$(cat "$dotest/keep")" = t
 195 then
 196         keep=-k
 197 fi
 198 if test "$(cat "$dotest/sign")" = t
 199 then
 200         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 201                         s/>.*/>/
 202                         s/^/Signed-off-by: /'
 203                 `
 204 else
 205         SIGNOFF=
 206 fi
 207
 208 last=`cat "$dotest/last"`
 209 this=`cat "$dotest/next"`
 210 if test "$skip" = t
 211 then
 212         this=`expr "$this" + 1`
 213 fi
 214
 215 if test "$this" -gt "$last"
 216 then
 217         echo Nothing to do.
 218         rm -fr "$dotest"
 219         exit
 220 fi
 221
 222 while test "$this" -le "$last"
 223 do
 224         msgnum=`printf "%0${prec}d" $this`
 225         next=`expr "$this" + 1`
 226         test -f "$dotest/$msgnum" || {
 227                 go_next
 228                 continue
 229         }
 230
 231         # If we are not resuming, parse and extract the patch information
 232         # into separate files:
 233         #  - info records the authorship and title
 234         #  - msg is the rest of commit log message
 235         #  - patch is the patch body.
 236         #
 237         # When we are resuming, these files are either already prepared
 238         # by the user, or the user can tell us to do so by --resolved flag.
 239         case "$resume" in
 240         '')
 241                 git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 242                         <"$dotest/$msgnum" >"$dotest/info" ||
 243                         stop_here $this
 244                 git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 245                 ;;
 246         esac
 247
 248         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 249         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 250         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 251         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 252
 253         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 254         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 255
 256         case "$resume" in
 257         '')
 258             if test '' != "$SIGNOFF"
 259             then
 260                 LAST_SIGNED_OFF_BY=`
 261                     sed -ne '/^Signed-off-by: /p' \
 262                     "$dotest/msg-clean" |
 263                     tail -n 1
 264                 `
 265                 ADD_SIGNOFF=`
 266                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 267                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 268                     echo "$SIGNOFF"
 269                 }`
 270             else
 271                 ADD_SIGNOFF=
 272             fi
 273             {
 274                 echo "$SUBJECT"
 275                 if test -s "$dotest/msg-clean"
 276                 then
 277                         echo
 278                         cat "$dotest/msg-clean"
 279                 fi
 280                 if test '' != "$ADD_SIGNOFF"
 281                 then
 282                         echo "$ADD_SIGNOFF"
 283                 fi
 284             } >"$dotest/final-commit"
 285             ;;
 286         *)
 287                 case "$resolved,$interactive" in
 288                 tt)
 289                         # This is used only for interactive view option.
 290                         git-diff-index -p --cached HEAD >"$dotest/patch"
 291                         ;;
 292                 esac
 293         esac
 294
 295         resume=
 296         if test "$interactive" = t
 297         then
 298             test -t 0 ||
 299             die "cannot be interactive without stdin connected to a terminal."
 300             action=again
 301             while test "$action" = again
 302             do
 303                 echo "Commit Body is:"
 304                 echo "--------------------------"
 305                 cat "$dotest/final-commit"
 306                 echo "--------------------------"
 307                 echo -n "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 308                 read reply
 309                 case "$reply" in
 310                 [yY]*) action=yes ;;
 311                 [aA]*) action=yes interactive= ;;
 312                 [nN]*) action=skip ;;
 313                 [eE]*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 314                        action=again ;;
 315                 [vV]*) action=again
 316                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 317                 *)     action=again ;;
 318                 esac
 319             done
 320         else
 321             action=yes
 322         fi
 323
 324         if test $action = skip
 325         then
 326                 go_next
 327                 continue
 328         fi
 329
 330         if test -x "$GIT_DIR"/hooks/applypatch-msg
 331         then
 332                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 333                 stop_here $this
 334         fi
 335
 336         echo
 337         echo "Applying '$SUBJECT'"
 338         echo
 339
 340         case "$resolved" in
 341         '')
 342                 git-apply --index "$dotest/patch"
 343                 apply_status=$?
 344                 ;;
 345         t)
 346                 # Resolved means the user did all the hard work, and
 347                 # we do not have to do any patch application.  Just
 348                 # trust what the user has in the index file and the
 349                 # working tree.
 350                 resolved=
 351                 apply_status=0
 352                 ;;
 353         esac
 354
 355         if test $apply_status = 1 && test "$threeway" = t
 356         then
 357                 if (fall_back_3way)
 358                 then
 359                     # Applying the patch to an earlier tree and merging the
 360                     # result may have produced the same tree as ours.
 361                     changed="$(git-diff-index --cached --name-only -z HEAD)"
 362                     if test '' = "$changed"
 363                     then
 364                             echo No changes -- Patch already applied.
 365                             go_next
 366                             continue
 367                     fi
 368                     # clear apply_status -- we have successfully merged.
 369                     apply_status=0
 370                 fi
 371         fi
 372         if test $apply_status != 0
 373         then
 374                 echo Patch failed at $msgnum.
 375                 stop_here $this
 376         fi
 377
 378         if test -x "$GIT_DIR"/hooks/pre-applypatch
 379         then
 380                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 381         fi
 382
 383         tree=$(git-write-tree) &&
 384         echo Wrote tree $tree &&
 385         parent=$(git-rev-parse --verify HEAD) &&
 386         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 387         echo Committed: $commit &&
 388         git-update-ref HEAD $commit $parent ||
 389         stop_here $this
 390
 391         if test -x "$GIT_DIR"/hooks/post-applypatch
 392         then
 393                 "$GIT_DIR"/hooks/post-applypatch
 394         fi
 395
 396         go_next
 397 done
 398
 399 rm -fr "$dotest"