Merge branch 'jc/sha1'
[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 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 >"$dotest/patch-merge-base+" &&
61         # index has the base tree now.
62         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
63         git-apply $binary --cached <"$dotest/patch"
64     then
65         echo Using index info to reconstruct a base tree...
66         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
67         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
68     fi
69
70     test -f "$dotest/patch-merge-index" &&
71     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
72     orig_tree=$(cat "$dotest/patch-merge-base") &&
73     rm -fr "$dotest"/patch-merge-* || exit 1
74
75     echo Falling back to patching base and 3-way merge...
76
77     # This is not so wrong.  Depending on which base we picked,
78     # orig_tree may be wildly different from ours, but his_tree
79     # has the same set of wildly different changes in parts the
80     # patch did not touch, so resolve ends up cancelling them,
81     # saying that we reverted all those changes.
82
83     git-merge-resolve $orig_tree -- HEAD $his_tree || {
84             if test -d "$GIT_DIR/rr-cache"
85             then
86                 git-rerere
87             fi
88             echo Failed to merge in the changes.
89             exit 1
90     }
91 }
92
93 prec=4
94 dotest=.dotest sign= utf8= keep= skip= interactive= resolved= binary= ws= resolvemsg=
95
96 while case "$#" in 0) break;; esac
97 do
98         case "$1" in
99         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
100         dotest=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
101         -d|--d|--do|--dot|--dote|--dotes|--dotest)
102         case "$#" in 1) usage ;; esac; shift
103         dotest="$1"; shift;;
104
105         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
106         --interacti|--interactiv|--interactive)
107         interactive=t; shift ;;
108
109         -b|--b|--bi|--bin|--bina|--binar|--binary)
110         binary=t; shift ;;
111
112         -3|--3|--3w|--3wa|--3way)
113         threeway=t; shift ;;
114         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
115         sign=t; shift ;;
116         -u|--u|--ut|--utf|--utf8)
117         utf8=t; shift ;;
118         -k|--k|--ke|--kee|--keep)
119         keep=t; shift ;;
120
121         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
122         resolved=t; shift ;;
123
124         --sk|--ski|--skip)
125         skip=t; shift ;;
126
127         --whitespace=*)
128         ws=$1; shift ;;
129
130         --resolvemsg=*)
131         resolvemsg=$(echo "$1" | sed -e "s/^--resolvemsg=//"); shift ;;
132
133         --)
134         shift; break ;;
135         -*)
136         usage ;;
137         *)
138         break ;;
139         esac
140 done
141
142 # If the dotest directory exists, but we have finished applying all the
143 # patches in them, clear it out.
144 if test -d "$dotest" &&
145    last=$(cat "$dotest/last") &&
146    next=$(cat "$dotest/next") &&
147    test $# != 0 &&
148    test "$next" -gt "$last"
149 then
150    rm -fr "$dotest"
151 fi
152
153 if test -d "$dotest"
154 then
155         test ",$#," = ",0," ||
156         die "previous dotest directory $dotest still exists but mbox given."
157         resume=yes
158 else
159         # Make sure we are not given --skip nor --resolved
160         test ",$skip,$resolved," = ,,, ||
161                 die "Resolve operation not in progress, we are not resuming."
162
163         # Start afresh.
164         mkdir -p "$dotest" || exit
165
166         git-mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
167                 rm -fr "$dotest"
168                 exit 1
169         }
170
171         # -b, -s, -u, -k and --whitespace flags are kept for the
172         # resuming session after a patch failure.
173         # -3 and -i can and must be given when resuming.
174         echo "$binary" >"$dotest/binary"
175         echo " $ws" >"$dotest/whitespace"
176         echo "$sign" >"$dotest/sign"
177         echo "$utf8" >"$dotest/utf8"
178         echo "$keep" >"$dotest/keep"
179         echo 1 >"$dotest/next"
180 fi
181
182 case "$resolved" in
183 '')
184         files=$(git-diff-index --cached --name-only HEAD) || exit
185         if [ "$files" ]; then
186            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
187            exit 1
188         fi
189 esac
190
191 if test "$(cat "$dotest/binary")" = t
192 then
193         binary=--allow-binary-replacement
194 fi
195 if test "$(cat "$dotest/utf8")" = t
196 then
197         utf8=-u
198 fi
199 if test "$(cat "$dotest/keep")" = t
200 then
201         keep=-k
202 fi
203 ws=`cat "$dotest/whitespace"`
204 if test "$(cat "$dotest/sign")" = t
205 then
206         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
207                         s/>.*/>/
208                         s/^/Signed-off-by: /'
209                 `
210 else
211         SIGNOFF=
212 fi
213
214 last=`cat "$dotest/last"`
215 this=`cat "$dotest/next"`
216 if test "$skip" = t
217 then
218         this=`expr "$this" + 1`
219         resume=
220 fi
221
222 if test "$this" -gt "$last"
223 then
224         echo Nothing to do.
225         rm -fr "$dotest"
226         exit
227 fi
228
229 while test "$this" -le "$last"
230 do
231         msgnum=`printf "%0${prec}d" $this`
232         next=`expr "$this" + 1`
233         test -f "$dotest/$msgnum" || {
234                 resume=
235                 go_next
236                 continue
237         }
238
239         # If we are not resuming, parse and extract the patch information
240         # into separate files:
241         #  - info records the authorship and title
242         #  - msg is the rest of commit log message
243         #  - patch is the patch body.
244         #
245         # When we are resuming, these files are either already prepared
246         # by the user, or the user can tell us to do so by --resolved flag.
247         case "$resume" in
248         '')
249                 git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
250                         <"$dotest/$msgnum" >"$dotest/info" ||
251                         stop_here $this
252                 git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
253                 ;;
254         esac
255
256         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
257         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
258         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
259
260         if test -z "$GIT_AUTHOR_EMAIL"
261         then
262                 echo "Patch does not have a valid e-mail address."
263                 stop_here $this
264         fi
265
266         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
267
268         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
269         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
270
271         case "$resume" in
272         '')
273             if test '' != "$SIGNOFF"
274             then
275                 LAST_SIGNED_OFF_BY=`
276                     sed -ne '/^Signed-off-by: /p' \
277                     "$dotest/msg-clean" |
278                     tail -n 1
279                 `
280                 ADD_SIGNOFF=`
281                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
282                     test '' = "$LAST_SIGNED_OFF_BY" && echo
283                     echo "$SIGNOFF"
284                 }`
285             else
286                 ADD_SIGNOFF=
287             fi
288             {
289                 echo "$SUBJECT"
290                 if test -s "$dotest/msg-clean"
291                 then
292                         echo
293                         cat "$dotest/msg-clean"
294                 fi
295                 if test '' != "$ADD_SIGNOFF"
296                 then
297                         echo "$ADD_SIGNOFF"
298                 fi
299             } >"$dotest/final-commit"
300             ;;
301         *)
302                 case "$resolved$interactive" in
303                 tt)
304                         # This is used only for interactive view option.
305                         git-diff-index -p --cached HEAD >"$dotest/patch"
306                         ;;
307                 esac
308         esac
309
310         resume=
311         if test "$interactive" = t
312         then
313             test -t 0 ||
314             die "cannot be interactive without stdin connected to a terminal."
315             action=again
316             while test "$action" = again
317             do
318                 echo "Commit Body is:"
319                 echo "--------------------------"
320                 cat "$dotest/final-commit"
321                 echo "--------------------------"
322                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
323                 read reply
324                 case "$reply" in
325                 [yY]*) action=yes ;;
326                 [aA]*) action=yes interactive= ;;
327                 [nN]*) action=skip ;;
328                 [eE]*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
329                        action=again ;;
330                 [vV]*) action=again
331                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
332                 *)     action=again ;;
333                 esac
334             done
335         else
336             action=yes
337         fi
338
339         if test $action = skip
340         then
341                 go_next
342                 continue
343         fi
344
345         if test -x "$GIT_DIR"/hooks/applypatch-msg
346         then
347                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
348                 stop_here $this
349         fi
350
351         echo
352         echo "Applying '$SUBJECT'"
353         echo
354
355         case "$resolved" in
356         '')
357                 git-apply $binary --index $ws "$dotest/patch"
358                 apply_status=$?
359                 ;;
360         t)
361                 # Resolved means the user did all the hard work, and
362                 # we do not have to do any patch application.  Just
363                 # trust what the user has in the index file and the
364                 # working tree.
365                 resolved=
366                 changed="$(git-diff-index --cached --name-only HEAD)"
367                 if test '' = "$changed"
368                 then
369                         echo "No changes - did you forget update-index?"
370                         stop_here_user_resolve $this
371                 fi
372                 unmerged=$(git-ls-files -u)
373                 if test -n "$unmerged"
374                 then
375                         echo "You still have unmerged paths in your index"
376                         echo "did you forget update-index?"
377                         stop_here_user_resolve $this
378                 fi
379                 apply_status=0
380                 ;;
381         esac
382
383         if test $apply_status = 1 && test "$threeway" = t
384         then
385                 if (fall_back_3way)
386                 then
387                     # Applying the patch to an earlier tree and merging the
388                     # result may have produced the same tree as ours.
389                     changed="$(git-diff-index --cached --name-only HEAD)"
390                     if test '' = "$changed"
391                     then
392                             echo No changes -- Patch already applied.
393                             go_next
394                             continue
395                     fi
396                     # clear apply_status -- we have successfully merged.
397                     apply_status=0
398                 fi
399         fi
400         if test $apply_status != 0
401         then
402                 echo Patch failed at $msgnum.
403                 stop_here_user_resolve $this
404         fi
405
406         if test -x "$GIT_DIR"/hooks/pre-applypatch
407         then
408                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
409         fi
410
411         tree=$(git-write-tree) &&
412         echo Wrote tree $tree &&
413         parent=$(git-rev-parse --verify HEAD) &&
414         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
415         echo Committed: $commit &&
416         git-update-ref -m "am: $SUBJECT" HEAD $commit $parent ||
417         stop_here $this
418
419         if test -x "$GIT_DIR"/hooks/post-applypatch
420         then
421                 "$GIT_DIR"/hooks/post-applypatch
422         fi
423
424         go_next
425 done
426
427 rm -fr "$dotest"