]> git.ipfire.org Git - thirdparty/git.git/blob - git-stash.sh
Merge branch 'jc/maint-imap-config-parse' into maint
[thirdparty/git.git] / git-stash.sh
1 #!/bin/sh
2 # Copyright (c) 2007, Nanako Shiraishi
3
4 dashless=$(basename "$0" | sed -e 's/-/ /')
5 USAGE="list [<options>]
6 or: $dashless show [<stash>]
7 or: $dashless drop [-q|--quiet] [<stash>]
8 or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
9 or: $dashless branch <branchname> [<stash>]
10 or: $dashless [save [--patch] [-k|--[no-]keep-index] [-q|--quiet] [<message>]]
11 or: $dashless clear"
12
13 SUBDIRECTORY_OK=Yes
14 OPTIONS_SPEC=
15 . git-sh-setup
16 require_work_tree
17 cd_to_toplevel
18
19 TMP="$GIT_DIR/.git-stash.$$"
20 trap 'rm -f "$TMP-*"' 0
21
22 ref_stash=refs/stash
23
24 if git config --get-colorbool color.interactive; then
25 help_color="$(git config --get-color color.interactive.help 'red bold')"
26 reset_color="$(git config --get-color '' reset)"
27 else
28 help_color=
29 reset_color=
30 fi
31
32 no_changes () {
33 git diff-index --quiet --cached HEAD --ignore-submodules -- &&
34 git diff-files --quiet --ignore-submodules
35 }
36
37 clear_stash () {
38 if test $# != 0
39 then
40 die "git stash clear with parameters is unimplemented"
41 fi
42 if current=$(git rev-parse --verify $ref_stash 2>/dev/null)
43 then
44 git update-ref -d $ref_stash $current
45 fi
46 }
47
48 create_stash () {
49 stash_msg="$1"
50
51 git update-index -q --refresh
52 if no_changes
53 then
54 exit 0
55 fi
56
57 # state of the base commit
58 if b_commit=$(git rev-parse --verify HEAD)
59 then
60 head=$(git log --no-color --abbrev-commit --pretty=oneline -n 1 HEAD --)
61 else
62 die "You do not have the initial commit yet"
63 fi
64
65 if branch=$(git symbolic-ref -q HEAD)
66 then
67 branch=${branch#refs/heads/}
68 else
69 branch='(no branch)'
70 fi
71 msg=$(printf '%s: %s' "$branch" "$head")
72
73 # state of the index
74 i_tree=$(git write-tree) &&
75 i_commit=$(printf 'index on %s\n' "$msg" |
76 git commit-tree $i_tree -p $b_commit) ||
77 die "Cannot save the current index state"
78
79 if test -z "$patch_mode"
80 then
81
82 # state of the working tree
83 w_tree=$( (
84 rm -f "$TMP-index" &&
85 cp -p ${GIT_INDEX_FILE-"$GIT_DIR/index"} "$TMP-index" &&
86 GIT_INDEX_FILE="$TMP-index" &&
87 export GIT_INDEX_FILE &&
88 git read-tree -m $i_tree &&
89 git add -u &&
90 git write-tree &&
91 rm -f "$TMP-index"
92 ) ) ||
93 die "Cannot save the current worktree state"
94
95 else
96
97 rm -f "$TMP-index" &&
98 GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
99
100 # find out what the user wants
101 GIT_INDEX_FILE="$TMP-index" \
102 git add--interactive --patch=stash -- &&
103
104 # state of the working tree
105 w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
106 die "Cannot save the current worktree state"
107
108 git diff-tree -p HEAD $w_tree > "$TMP-patch" &&
109 test -s "$TMP-patch" ||
110 die "No changes selected"
111
112 rm -f "$TMP-index" ||
113 die "Cannot remove temporary index (can't happen)"
114
115 fi
116
117 # create the stash
118 if test -z "$stash_msg"
119 then
120 stash_msg=$(printf 'WIP on %s' "$msg")
121 else
122 stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
123 fi
124 w_commit=$(printf '%s\n' "$stash_msg" |
125 git commit-tree $w_tree -p $b_commit -p $i_commit) ||
126 die "Cannot record working tree state"
127 }
128
129 save_stash () {
130 keep_index=
131 patch_mode=
132 while test $# != 0
133 do
134 case "$1" in
135 -k|--keep-index)
136 keep_index=t
137 ;;
138 --no-keep-index)
139 keep_index=
140 ;;
141 -p|--patch)
142 patch_mode=t
143 keep_index=t
144 ;;
145 -q|--quiet)
146 GIT_QUIET=t
147 ;;
148 --)
149 shift
150 break
151 ;;
152 -*)
153 echo "error: unknown option for 'stash save': $1"
154 usage
155 ;;
156 *)
157 break
158 ;;
159 esac
160 shift
161 done
162
163 stash_msg="$*"
164
165 git update-index -q --refresh
166 if no_changes
167 then
168 say 'No local changes to save'
169 exit 0
170 fi
171 test -f "$GIT_DIR/logs/$ref_stash" ||
172 clear_stash || die "Cannot initialize stash"
173
174 create_stash "$stash_msg"
175
176 # Make sure the reflog for stash is kept.
177 : >>"$GIT_DIR/logs/$ref_stash"
178
179 git update-ref -m "$stash_msg" $ref_stash $w_commit ||
180 die "Cannot save the current status"
181 say Saved working directory and index state "$stash_msg"
182
183 if test -z "$patch_mode"
184 then
185 git reset --hard ${GIT_QUIET:+-q}
186
187 if test -n "$keep_index" && test -n $i_tree
188 then
189 git read-tree --reset -u $i_tree
190 fi
191 else
192 git apply -R < "$TMP-patch" ||
193 die "Cannot remove worktree changes"
194
195 if test -z "$keep_index"
196 then
197 git reset
198 fi
199 fi
200 }
201
202 have_stash () {
203 git rev-parse --verify $ref_stash >/dev/null 2>&1
204 }
205
206 list_stash () {
207 have_stash || return 0
208 git log --format="%gd: %gs" -g "$@" $ref_stash --
209 }
210
211 show_stash () {
212 flags=$(git rev-parse --no-revs --flags "$@")
213 if test -z "$flags"
214 then
215 flags=--stat
216 fi
217
218 w_commit=$(git rev-parse --verify --default $ref_stash "$@") &&
219 b_commit=$(git rev-parse --verify "$w_commit^") &&
220 git diff $flags $b_commit $w_commit
221 }
222
223 apply_stash () {
224 unstash_index=
225
226 while test $# != 0
227 do
228 case "$1" in
229 --index)
230 unstash_index=t
231 ;;
232 -q|--quiet)
233 GIT_QUIET=t
234 ;;
235 *)
236 break
237 ;;
238 esac
239 shift
240 done
241
242 if test $# = 0
243 then
244 have_stash || die 'Nothing to apply'
245 fi
246
247 # stash records the work tree, and is a merge between the
248 # base commit (first parent) and the index tree (second parent).
249 s=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
250 w_tree=$(git rev-parse --quiet --verify "$s:") &&
251 b_tree=$(git rev-parse --quiet --verify "$s^1:") &&
252 i_tree=$(git rev-parse --quiet --verify "$s^2:") ||
253 die "$*: no valid stashed state found"
254
255 git update-index -q --refresh &&
256 git diff-files --quiet --ignore-submodules ||
257 die 'Cannot apply to a dirty working tree, please stage your changes'
258
259 # current index state
260 c_tree=$(git write-tree) ||
261 die 'Cannot apply a stash in the middle of a merge'
262
263 unstashed_index_tree=
264 if test -n "$unstash_index" && test "$b_tree" != "$i_tree" &&
265 test "$c_tree" != "$i_tree"
266 then
267 git diff-tree --binary $s^2^..$s^2 | git apply --cached
268 test $? -ne 0 &&
269 die 'Conflicts in index. Try without --index.'
270 unstashed_index_tree=$(git write-tree) ||
271 die 'Could not save index tree'
272 git reset
273 fi
274
275 eval "
276 GITHEAD_$w_tree='Stashed changes' &&
277 GITHEAD_$c_tree='Updated upstream' &&
278 GITHEAD_$b_tree='Version stash was based on' &&
279 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
280 "
281
282 if test -n "$GIT_QUIET"
283 then
284 export GIT_MERGE_VERBOSITY=0
285 fi
286 if git merge-recursive $b_tree -- $c_tree $w_tree
287 then
288 # No conflict
289 if test -n "$unstashed_index_tree"
290 then
291 git read-tree "$unstashed_index_tree"
292 else
293 a="$TMP-added" &&
294 git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
295 git read-tree --reset $c_tree &&
296 git update-index --add --stdin <"$a" ||
297 die "Cannot unstage modified files"
298 rm -f "$a"
299 fi
300 squelch=
301 if test -n "$GIT_QUIET"
302 then
303 squelch='>/dev/null 2>&1'
304 fi
305 eval "git status $squelch" || :
306 else
307 # Merge conflict; keep the exit status from merge-recursive
308 status=$?
309 if test -n "$unstash_index"
310 then
311 echo >&2 'Index was not unstashed.'
312 fi
313 exit $status
314 fi
315 }
316
317 drop_stash () {
318 have_stash || die 'No stash entries to drop'
319
320 while test $# != 0
321 do
322 case "$1" in
323 -q|--quiet)
324 GIT_QUIET=t
325 ;;
326 *)
327 break
328 ;;
329 esac
330 shift
331 done
332
333 if test $# = 0
334 then
335 set x "$ref_stash@{0}"
336 shift
337 fi
338 # Verify supplied argument looks like a stash entry
339 s=$(git rev-parse --verify "$@") &&
340 git rev-parse --verify "$s:" > /dev/null 2>&1 &&
341 git rev-parse --verify "$s^1:" > /dev/null 2>&1 &&
342 git rev-parse --verify "$s^2:" > /dev/null 2>&1 ||
343 die "$*: not a valid stashed state"
344
345 git reflog delete --updateref --rewrite "$@" &&
346 say "Dropped $* ($s)" || die "$*: Could not drop stash entry"
347
348 # clear_stash if we just dropped the last stash entry
349 git rev-parse --verify "$ref_stash@{0}" > /dev/null 2>&1 || clear_stash
350 }
351
352 apply_to_branch () {
353 have_stash || die 'Nothing to apply'
354
355 test -n "$1" || die 'No branch name specified'
356 branch=$1
357
358 if test -z "$2"
359 then
360 set x "$ref_stash@{0}"
361 fi
362 stash=$2
363
364 git checkout -b $branch $stash^ &&
365 apply_stash --index $stash &&
366 drop_stash $stash
367 }
368
369 # The default command is "save" if nothing but options are given
370 seen_non_option=
371 for opt
372 do
373 case "$opt" in
374 -*) ;;
375 *) seen_non_option=t; break ;;
376 esac
377 done
378
379 test -n "$seen_non_option" || set "save" "$@"
380
381 # Main command set
382 case "$1" in
383 list)
384 shift
385 list_stash "$@"
386 ;;
387 show)
388 shift
389 show_stash "$@"
390 ;;
391 save)
392 shift
393 save_stash "$@"
394 ;;
395 apply)
396 shift
397 apply_stash "$@"
398 ;;
399 clear)
400 shift
401 clear_stash "$@"
402 ;;
403 create)
404 if test $# -gt 0 && test "$1" = create
405 then
406 shift
407 fi
408 create_stash "$*" && echo "$w_commit"
409 ;;
410 drop)
411 shift
412 drop_stash "$@"
413 ;;
414 pop)
415 shift
416 if apply_stash "$@"
417 then
418 test -z "$unstash_index" || shift
419 drop_stash "$@"
420 fi
421 ;;
422 branch)
423 shift
424 apply_to_branch "$@"
425 ;;
426 *)
427 case $# in
428 0)
429 save_stash &&
430 say '(To restore them type "git stash apply")'
431 ;;
432 *)
433 usage
434 esac
435 ;;
436 esac