1#!/bin/sh
2# Copyright (c) 2007, Nanako Shiraishi
3dashless=$(basename "$0" | sed -e 's/-/ /')
5USAGE="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 [-k|--keep-index] [-q|--quiet] [<message>]]
11 or: $dashless clear"
12SUBDIRECTORY_OK=Yes
14OPTIONS_SPEC=
15. git-sh-setup
16require_work_tree
17cd_to_toplevel
18TMP="$GIT_DIR/.git-stash.$$"
20trap 'rm -f "$TMP-*"' 0
21ref_stash=refs/stash
23if git config --get-colorbool color.interactive; then
25 help_color="$(git config --get-color color.interactive.help 'red bold')"
26 reset_color="$(git config --get-color '' reset)"
27else
28 help_color=
29 reset_color=
30fi
31no_changes () {
33 git diff-index --quiet --cached HEAD --ignore-submodules -- &&
34 git diff-files --quiet --ignore-submodules
35}
36clear_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}
47create_stash () {
49 stash_msg="$1"
50 git update-index -q --refresh
52 if no_changes
53 then
54 exit 0
55 fi
56 # state of the base commit
58 if b_commit=$(git rev-parse --verify HEAD)
59 then
60 head=$(git log --no-color --abbrev-commit --pretty=oneline -n 1 HEAD --)
61 else
62 die "You do not have the initial commit yet"
63 fi
64 if branch=$(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 # 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 $b_commit) ||
77 die "Cannot save the current index state"
78 if test -z "$patch_mode"
80 then
81 # 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 else
96 rm -f "$TMP-index" &&
98 GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
99 # find out what the user wants
101 GIT_INDEX_FILE="$TMP-index" \
102 git add--interactive --patch=stash -- &&
103 # state of the working tree
105 w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
106 die "Cannot save the current worktree state"
107 git diff-tree -p HEAD $w_tree > "$TMP-patch" &&
109 test -s "$TMP-patch" ||
110 die "No changes selected"
111 rm -f "$TMP-index" ||
113 die "Cannot remove temporary index (can't happen)"
114 fi
116 # 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}
128save_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': $1"
154 usage
155 ;;
156 *)
157 break
158 ;;
159 esac
160 shift
161 done
162 stash_msg="$*"
164 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 create_stash "$stash_msg"
175 # Make sure the reflog for stash is kept.
177 : >>"$GIT_DIR/logs/$ref_stash"
178 git update-ref -m "$stash_msg" $ref_stash $w_commit ||
180 die "Cannot save the current status"
181 say Saved working directory and index state "$stash_msg"
182 if test -z "$patch_mode"
184 then
185 git reset --hard ${GIT_QUIET:+-q}
186 if test -n "$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 if test -z "$keep_index"
196 then
197 git reset
198 fi
199 fi
200}
201have_stash () {
203 git rev-parse --verify $ref_stash >/dev/null 2>&1
204}
205list_stash () {
207 have_stash || return 0
208 git log --no-color --pretty=oneline -g "$@" $ref_stash -- |
209 sed -n -e 's/^[.0-9a-f]* refs\///p'
210}
211show_stash () {
213 flags=$(git rev-parse --no-revs --flags "$@")
214 if test -z "$flags"
215 then
216 flags=--stat
217 fi
218 w_commit=$(git rev-parse --verify --default $ref_stash "$@") &&
220 b_commit=$(git rev-parse --verify "$w_commit^") &&
221 git diff $flags $b_commit $w_commit
222}
223apply_stash () {
225 applied_stash=
226 unstash_index=
227 while test $# != 0
229 do
230 case "$1" in
231 --index)
232 unstash_index=t
233 ;;
234 -q|--quiet)
235 GIT_QUIET=t
236 ;;
237 *)
238 break
239 ;;
240 esac
241 shift
242 done
243 if test $# = 0
245 then
246 have_stash || die 'Nothing to apply'
247 applied_stash="$ref_stash@{0}"
248 else
249 applied_stash="$*"
250 fi
251 # stash records the work tree, and is a merge between the
253 # base commit (first parent) and the index tree (second parent).
254 s=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
255 w_tree=$(git rev-parse --quiet --verify "$s:") &&
256 b_tree=$(git rev-parse --quiet --verify "$s^1:") &&
257 i_tree=$(git rev-parse --quiet --verify "$s^2:") ||
258 die "$*: no valid stashed state found"
259 git update-index -q --refresh &&
261 git diff-files --quiet --ignore-submodules ||
262 die 'Cannot apply to a dirty working tree, please stage your changes'
263 # current index state
265 c_tree=$(git write-tree) ||
266 die 'Cannot apply a stash in the middle of a merge'
267 unstashed_index_tree=
269 if test -n "$unstash_index" && test "$b_tree" != "$i_tree" &&
270 test "$c_tree" != "$i_tree"
271 then
272 git diff-tree --binary $s^2^..$s^2 | git apply --cached
273 test $? -ne 0 &&
274 die 'Conflicts in index. Try without --index.'
275 unstashed_index_tree=$(git write-tree) ||
276 die 'Could not save index tree'
277 git reset
278 fi
279 eval "
281 GITHEAD_$w_tree='Stashed changes' &&
282 GITHEAD_$c_tree='Updated upstream' &&
283 GITHEAD_$b_tree='Version stash was based on' &&
284 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
285 "
286 if test -n "$GIT_QUIET"
288 then
289 export GIT_MERGE_VERBOSITY=0
290 fi
291 if git merge-recursive $b_tree -- $c_tree $w_tree
292 then
293 # No conflict
294 if test -n "$unstashed_index_tree"
295 then
296 git read-tree "$unstashed_index_tree"
297 else
298 a="$TMP-added" &&
299 git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
300 git read-tree --reset $c_tree &&
301 git update-index --add --stdin <"$a" ||
302 die "Cannot unstage modified files"
303 rm -f "$a"
304 fi
305 squelch=
306 if test -n "$GIT_QUIET"
307 then
308 squelch='>/dev/null 2>&1'
309 fi
310 eval "git status $squelch" || :
311 else
312 # Merge conflict; keep the exit status from merge-recursive
313 status=$?
314 if test -n "$unstash_index"
315 then
316 echo >&2 'Index was not unstashed.'
317 fi
318 exit $status
319 fi
320}
321drop_stash () {
323 have_stash || die 'No stash entries to drop'
324 while test $# != 0
326 do
327 case "$1" in
328 -q|--quiet)
329 GIT_QUIET=t
330 ;;
331 *)
332 break
333 ;;
334 esac
335 shift
336 done
337 if test $# = 0
339 then
340 set x "$ref_stash@{0}"
341 shift
342 fi
343 # Verify supplied argument looks like a stash entry
344 s=$(git rev-parse --verify "$@") &&
345 git rev-parse --verify "$s:" > /dev/null 2>&1 &&
346 git rev-parse --verify "$s^1:" > /dev/null 2>&1 &&
347 git rev-parse --verify "$s^2:" > /dev/null 2>&1 ||
348 die "$*: not a valid stashed state"
349 git reflog delete --updateref --rewrite "$@" &&
351 say "Dropped $* ($s)" || die "$*: Could not drop stash entry"
352 # clear_stash if we just dropped the last stash entry
354 git rev-parse --verify "$ref_stash@{0}" > /dev/null 2>&1 || clear_stash
355}
356apply_to_branch () {
358 have_stash || die 'Nothing to apply'
359 test -n "$1" || die 'No branch name specified'
361 branch=$1
362 if test -z "$2"
364 then
365 set x "$ref_stash@{0}"
366 fi
367 stash=$2
368 git checkout -b $branch $stash^ &&
370 apply_stash --index $stash &&
371 drop_stash $stash
372}
373# The default command is "save" if nothing but options are given
375seen_non_option=
376for opt
377do
378 case "$opt" in
379 -*) ;;
380 *) seen_non_option=t; break ;;
381 esac
382done
383test -n "$seen_non_option" || set "save" "$@"
385# Main command set
387case "$1" in
388list)
389 shift
390 if test $# = 0
391 then
392 set x -n 10
393 shift
394 fi
395 list_stash "$@"
396 ;;
397show)
398 shift
399 show_stash "$@"
400 ;;
401save)
402 shift
403 save_stash "$@"
404 ;;
405apply)
406 shift
407 apply_stash "$@"
408 ;;
409clear)
410 shift
411 clear_stash "$@"
412 ;;
413create)
414 if test $# -gt 0 && test "$1" = create
415 then
416 shift
417 fi
418 create_stash "$*" && echo "$w_commit"
419 ;;
420drop)
421 shift
422 drop_stash "$@"
423 ;;
424pop)
425 shift
426 if apply_stash "$@"
427 then
428 drop_stash "$applied_stash"
429 fi
430 ;;
431branch)
432 shift
433 apply_to_branch "$@"
434 ;;
435*)
436 case $# in
437 0)
438 save_stash &&
439 say '(To restore them type "git stash apply")'
440 ;;
441 *)
442 usage
443 esac
444 ;;
445esac