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