git-am.sh

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