builtin-apply: prevent non-explicit permission changes
[git/trast.git] / git-am.sh
blob83b277acfdeafa1f745c3c96bc10eef320a2d6ec
1 #!/bin/sh
3 # Copyright (c) 2005, 2006 Junio C Hamano
5 SUBDIRECTORY_OK=Yes
6 OPTIONS_KEEPDASHDASH=
7 OPTIONS_SPEC="\
8 git-am [options] <mbox>|<Maildir>...
9 git-am [options] --resolved
10 git-am [options] --skip
12 d,dotest= (removed -- do not use)
13 i,interactive run interactively
14 b,binary pass --allow-binary-replacement to git-apply
15 3,3way allow fall back on 3way merging if needed
16 s,signoff add a Signed-off-by line to the commit message
17 u,utf8 recode into utf8 (default)
18 k,keep pass -k flag to git-mailinfo
19 whitespace= pass it through git-apply
20 C= pass it through git-apply
21 p= pass it through git-apply
22 resolvemsg= override error message when patch failure occurs
23 r,resolved to be used after a patch failure
24 skip skip the current patch
25 rebasing (internal use for git-rebase)"
27 . git-sh-setup
28 prefix=$(git rev-parse --show-prefix)
29 set_reflog_action am
30 require_work_tree
31 cd_to_toplevel
33 git var GIT_COMMITTER_IDENT >/dev/null ||
34 die "You need to set your committer info first"
36 stop_here () {
37 echo "$1" >"$dotest/next"
38 exit 1
41 stop_here_user_resolve () {
42 if [ -n "$resolvemsg" ]; then
43 printf '%s\n' "$resolvemsg"
44 stop_here $1
46 cmdline=$(basename $0)
47 if test '' != "$interactive"
48 then
49 cmdline="$cmdline -i"
51 if test '' != "$threeway"
52 then
53 cmdline="$cmdline -3"
55 echo "When you have resolved this problem run \"$cmdline --resolved\"."
56 echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
58 stop_here $1
61 go_next () {
62 rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
63 "$dotest/patch" "$dotest/info"
64 echo "$next" >"$dotest/next"
65 this=$next
68 cannot_fallback () {
69 echo "$1"
70 echo "Cannot fall back to three-way merge."
71 exit 1
74 fall_back_3way () {
75 O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
77 rm -fr "$dotest"/patch-merge-*
78 mkdir "$dotest/patch-merge-tmp-dir"
80 # First see if the patch records the index info that we can use.
81 git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
82 "$dotest/patch" &&
83 GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
84 git write-tree >"$dotest/patch-merge-base+" ||
85 cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
87 echo Using index info to reconstruct a base tree...
88 if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
89 git apply $binary --cached <"$dotest/patch"
90 then
91 mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
92 mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
93 else
94 cannot_fallback "Did you hand edit your patch?
95 It does not apply to blobs recorded in its index."
98 test -f "$dotest/patch-merge-index" &&
99 his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
100 orig_tree=$(cat "$dotest/patch-merge-base") &&
101 rm -fr "$dotest"/patch-merge-* || exit 1
103 echo Falling back to patching base and 3-way merge...
105 # This is not so wrong. Depending on which base we picked,
106 # orig_tree may be wildly different from ours, but his_tree
107 # has the same set of wildly different changes in parts the
108 # patch did not touch, so recursive ends up canceling them,
109 # saying that we reverted all those changes.
111 eval GITHEAD_$his_tree='"$FIRSTLINE"'
112 export GITHEAD_$his_tree
113 git-merge-recursive $orig_tree -- HEAD $his_tree || {
114 git rerere
115 echo Failed to merge in the changes.
116 exit 1
118 unset GITHEAD_$his_tree
121 prec=4
122 dotest=".dotest"
123 sign= utf8=t keep= skip= interactive= resolved= binary= rebasing=
124 resolvemsg= resume=
125 git_apply_opt=
127 while test $# != 0
129 case "$1" in
130 -i|--interactive)
131 interactive=t ;;
132 -b|--binary)
133 binary=t ;;
134 -3|--3way)
135 threeway=t ;;
136 -s|--signoff)
137 sign=t ;;
138 -u|--utf8)
139 utf8=t ;; # this is now default
140 --no-utf8)
141 utf8= ;;
142 -k|--keep)
143 keep=t ;;
144 -r|--resolved)
145 resolved=t ;;
146 --skip)
147 skip=t ;;
148 --rebasing)
149 rebasing=t threeway=t keep=t binary=t ;;
150 -d|--dotest)
151 die "-d option is no longer supported. Do not use."
153 --resolvemsg)
154 shift; resolvemsg=$1 ;;
155 --whitespace)
156 git_apply_opt="$git_apply_opt $1=$2"; shift ;;
157 -C|-p)
158 git_apply_opt="$git_apply_opt $1$2"; shift ;;
160 shift; break ;;
162 usage ;;
163 esac
164 shift
165 done
167 # If the dotest directory exists, but we have finished applying all the
168 # patches in them, clear it out.
169 if test -d "$dotest" &&
170 last=$(cat "$dotest/last") &&
171 next=$(cat "$dotest/next") &&
172 test $# != 0 &&
173 test "$next" -gt "$last"
174 then
175 rm -fr "$dotest"
178 if test -d "$dotest"
179 then
180 case "$#,$skip$resolved" in
181 0,*t*)
182 # Explicit resume command and we do not have file, so
183 # we are happy.
184 : ;;
186 # No file input but without resume parameters; catch
187 # user error to feed us a patch from standard input
188 # when there is already $dotest. This is somewhat
189 # unreliable -- stdin could be /dev/null for example
190 # and the caller did not intend to feed us a patch but
191 # wanted to continue unattended.
192 tty -s
195 false
197 esac ||
198 die "previous dotest directory $dotest still exists but mbox given."
199 resume=yes
200 else
201 # Make sure we are not given --skip nor --resolved
202 test ",$skip,$resolved," = ,,, ||
203 die "Resolve operation not in progress, we are not resuming."
205 # Start afresh.
206 mkdir -p "$dotest" || exit
208 if test -n "$prefix" && test $# != 0
209 then
210 first=t
211 for arg
213 test -n "$first" && {
214 set x
215 first=
217 case "$arg" in
219 set "$@" "$arg" ;;
221 set "$@" "$prefix$arg" ;;
222 esac
223 done
224 shift
226 git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" || {
227 rm -fr "$dotest"
228 exit 1
231 # -b, -s, -u, -k and --whitespace flags are kept for the
232 # resuming session after a patch failure.
233 # -3 and -i can and must be given when resuming.
234 echo "$binary" >"$dotest/binary"
235 echo " $ws" >"$dotest/whitespace"
236 echo "$sign" >"$dotest/sign"
237 echo "$utf8" >"$dotest/utf8"
238 echo "$keep" >"$dotest/keep"
239 echo 1 >"$dotest/next"
240 if test -n "$rebasing"
241 then
242 : >"$dotest/rebasing"
243 else
244 : >"$dotest/applying"
248 case "$resolved" in
250 files=$(git diff-index --cached --name-only HEAD --) || exit
251 if [ "$files" ]; then
252 echo "Dirty index: cannot apply patches (dirty: $files)" >&2
253 exit 1
255 esac
257 if test "$(cat "$dotest/binary")" = t
258 then
259 binary=--allow-binary-replacement
261 if test "$(cat "$dotest/utf8")" = t
262 then
263 utf8=-u
264 else
265 utf8=-n
267 if test "$(cat "$dotest/keep")" = t
268 then
269 keep=-k
271 ws=`cat "$dotest/whitespace"`
272 if test "$(cat "$dotest/sign")" = t
273 then
274 SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
275 s/>.*/>/
276 s/^/Signed-off-by: /'
278 else
279 SIGNOFF=
282 last=`cat "$dotest/last"`
283 this=`cat "$dotest/next"`
284 if test "$skip" = t
285 then
286 git rerere clear
287 this=`expr "$this" + 1`
288 resume=
291 if test "$this" -gt "$last"
292 then
293 echo Nothing to do.
294 rm -fr "$dotest"
295 exit
298 while test "$this" -le "$last"
300 msgnum=`printf "%0${prec}d" $this`
301 next=`expr "$this" + 1`
302 test -f "$dotest/$msgnum" || {
303 resume=
304 go_next
305 continue
308 # If we are not resuming, parse and extract the patch information
309 # into separate files:
310 # - info records the authorship and title
311 # - msg is the rest of commit log message
312 # - patch is the patch body.
314 # When we are resuming, these files are either already prepared
315 # by the user, or the user can tell us to do so by --resolved flag.
316 case "$resume" in
318 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
319 <"$dotest/$msgnum" >"$dotest/info" ||
320 stop_here $this
322 # skip pine's internal folder data
323 grep '^Author: Mail System Internal Data$' \
324 <"$dotest"/info >/dev/null &&
325 go_next && continue
327 test -s $dotest/patch || {
328 echo "Patch is empty. Was it split wrong?"
329 stop_here $this
331 if test -f "$dotest/rebasing" &&
332 commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
333 -e q "$dotest/$msgnum") &&
334 test "$(git cat-file -t "$commit")" = commit
335 then
336 git cat-file commit "$commit" |
337 sed -e '1,/^$/d' >"$dotest/msg-clean"
338 else
339 SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
340 case "$keep_subject" in -k) SUBJECT="[PATCH] $SUBJECT" ;; esac
342 (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
343 git stripspace > "$dotest/msg-clean"
346 esac
348 GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
349 GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
350 GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
352 if test -z "$GIT_AUTHOR_EMAIL"
353 then
354 echo "Patch does not have a valid e-mail address."
355 stop_here $this
358 export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
360 case "$resume" in
362 if test '' != "$SIGNOFF"
363 then
364 LAST_SIGNED_OFF_BY=`
365 sed -ne '/^Signed-off-by: /p' \
366 "$dotest/msg-clean" |
367 sed -ne '$p'
369 ADD_SIGNOFF=`
370 test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
371 test '' = "$LAST_SIGNED_OFF_BY" && echo
372 echo "$SIGNOFF"
374 else
375 ADD_SIGNOFF=
378 if test -s "$dotest/msg-clean"
379 then
380 cat "$dotest/msg-clean"
382 if test '' != "$ADD_SIGNOFF"
383 then
384 echo "$ADD_SIGNOFF"
386 } >"$dotest/final-commit"
389 case "$resolved$interactive" in
391 # This is used only for interactive view option.
392 git diff-index -p --cached HEAD -- >"$dotest/patch"
394 esac
395 esac
397 resume=
398 if test "$interactive" = t
399 then
400 test -t 0 ||
401 die "cannot be interactive without stdin connected to a terminal."
402 action=again
403 while test "$action" = again
405 echo "Commit Body is:"
406 echo "--------------------------"
407 cat "$dotest/final-commit"
408 echo "--------------------------"
409 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
410 read reply
411 case "$reply" in
412 [yY]*) action=yes ;;
413 [aA]*) action=yes interactive= ;;
414 [nN]*) action=skip ;;
415 [eE]*) git_editor "$dotest/final-commit"
416 action=again ;;
417 [vV]*) action=again
418 LESS=-S ${PAGER:-less} "$dotest/patch" ;;
419 *) action=again ;;
420 esac
421 done
422 else
423 action=yes
425 FIRSTLINE=$(sed 1q "$dotest/final-commit")
427 if test $action = skip
428 then
429 go_next
430 continue
433 if test -x "$GIT_DIR"/hooks/applypatch-msg
434 then
435 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
436 stop_here $this
439 printf 'Applying %s\n' "$FIRSTLINE"
441 case "$resolved" in
443 git apply $git_apply_opt $binary --index "$dotest/patch"
444 apply_status=$?
447 # Resolved means the user did all the hard work, and
448 # we do not have to do any patch application. Just
449 # trust what the user has in the index file and the
450 # working tree.
451 resolved=
452 git diff-index --quiet --cached HEAD -- && {
453 echo "No changes - did you forget to use 'git add'?"
454 stop_here_user_resolve $this
456 unmerged=$(git ls-files -u)
457 if test -n "$unmerged"
458 then
459 echo "You still have unmerged paths in your index"
460 echo "did you forget to use 'git add'?"
461 stop_here_user_resolve $this
463 apply_status=0
464 git rerere
466 esac
468 if test $apply_status = 1 && test "$threeway" = t
469 then
470 if (fall_back_3way)
471 then
472 # Applying the patch to an earlier tree and merging the
473 # result may have produced the same tree as ours.
474 git diff-index --quiet --cached HEAD -- && {
475 echo No changes -- Patch already applied.
476 go_next
477 continue
479 # clear apply_status -- we have successfully merged.
480 apply_status=0
483 if test $apply_status != 0
484 then
485 echo Patch failed at $msgnum.
486 stop_here_user_resolve $this
489 if test -x "$GIT_DIR"/hooks/pre-applypatch
490 then
491 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
494 tree=$(git write-tree) &&
495 parent=$(git rev-parse --verify HEAD) &&
496 commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
497 git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
498 stop_here $this
500 if test -x "$GIT_DIR"/hooks/post-applypatch
501 then
502 "$GIT_DIR"/hooks/post-applypatch
505 go_next
506 done
508 git gc --auto
510 rm -fr "$dotest"