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1#!/bin/sh
2
3test_description='split index mode tests'
4
5GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
6export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
7
8. ./test-lib.sh
9
10# We need total control of index splitting here
11sane_unset GIT_TEST_SPLIT_INDEX
12
13# Testing a hard coded SHA against an index with an extension
14# that can vary from run to run is problematic so we disable
15# those extensions.
16sane_unset GIT_TEST_FSMONITOR
17sane_unset GIT_TEST_INDEX_THREADS
18
19# Create a file named as $1 with content read from stdin.
20# Set the file's mtime to a few seconds in the past to avoid racy situations.
21create_non_racy_file () {
22 cat >"$1" &&
23 test-tool chmtime =-5 "$1"
24}
25
26test_expect_success 'setup' '
27 test_oid_cache <<-EOF
28 own_v3 sha1:8299b0bcd1ac364e5f1d7768efb62fa2da79a339
29 own_v3 sha256:38a6d2925e3eceec33ad7b34cbff4e0086caa0daf28f31e51f5bd94b4a7af86b
30
31 base_v3 sha1:39d890139ee5356c7ef572216cebcd27aa41f9df
32 base_v3 sha256:c9baeadf905112bf6c17aefbd7d02267afd70ded613c30cafed2d40cb506e1ed
33
34 own_v4 sha1:432ef4b63f32193984f339431fd50ca796493569
35 own_v4 sha256:6738ac6319c25b694afa7bcc313deb182d1a59b68bf7a47b4296de83478c0420
36
37 base_v4 sha1:508851a7f0dfa8691e9f69c7f055865389012491
38 base_v4 sha256:3177d4adfdd4b6904f7e921d91d715a471c0dde7cf6a4bba574927f02b699508
39 EOF
40'
41
42test_expect_success 'enable split index' '
43 git config splitIndex.maxPercentChange 100 &&
44 git update-index --split-index &&
45 test-tool dump-split-index .git/index >actual &&
46 indexversion=$(git update-index --show-index-version) &&
47
48 # NEEDSWORK: Stop hard-coding checksums.
49 if test "$indexversion" = "4"
50 then
51 own=$(test_oid own_v4) &&
52 base=$(test_oid base_v4)
53 else
54 own=$(test_oid own_v3) &&
55 base=$(test_oid base_v3)
56 fi &&
57
58 cat >expect <<-EOF &&
59 own $own
60 base $base
61 replacements:
62 deletions:
63 EOF
64 test_cmp expect actual
65'
66
67test_expect_success 'add one file' '
68 create_non_racy_file one &&
69 git update-index --add one &&
70 git ls-files --stage >ls-files.actual &&
71 cat >ls-files.expect <<-EOF &&
72 100644 $EMPTY_BLOB 0 one
73 EOF
74 test_cmp ls-files.expect ls-files.actual &&
75
76 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
77 cat >expect <<-EOF &&
78 base $base
79 100644 $EMPTY_BLOB 0 one
80 replacements:
81 deletions:
82 EOF
83 test_cmp expect actual
84'
85
86test_expect_success 'disable split index' '
87 git update-index --no-split-index &&
88 git ls-files --stage >ls-files.actual &&
89 cat >ls-files.expect <<-EOF &&
90 100644 $EMPTY_BLOB 0 one
91 EOF
92 test_cmp ls-files.expect ls-files.actual &&
93
94 BASE=$(test-tool dump-split-index .git/index | sed -n "s/^own/base/p") &&
95 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
96 cat >expect <<-EOF &&
97 not a split index
98 EOF
99 test_cmp expect actual
100'
101
102test_expect_success 'enable split index again, "one" now belongs to base index"' '
103 git update-index --split-index &&
104 git ls-files --stage >ls-files.actual &&
105 cat >ls-files.expect <<-EOF &&
106 100644 $EMPTY_BLOB 0 one
107 EOF
108 test_cmp ls-files.expect ls-files.actual &&
109
110 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
111 cat >expect <<-EOF &&
112 $BASE
113 replacements:
114 deletions:
115 EOF
116 test_cmp expect actual
117'
118
119test_expect_success 'modify original file, base index untouched' '
120 echo modified | create_non_racy_file one &&
121 file1_blob=$(git hash-object one) &&
122 git update-index one &&
123 git ls-files --stage >ls-files.actual &&
124 cat >ls-files.expect <<-EOF &&
125 100644 $file1_blob 0 one
126 EOF
127 test_cmp ls-files.expect ls-files.actual &&
128
129 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
130 q_to_tab >expect <<-EOF &&
131 $BASE
132 100644 $file1_blob 0Q
133 replacements: 0
134 deletions:
135 EOF
136 test_cmp expect actual
137'
138
139test_expect_success 'add another file, which stays index' '
140 create_non_racy_file two &&
141 git update-index --add two &&
142 git ls-files --stage >ls-files.actual &&
143 cat >ls-files.expect <<-EOF &&
144 100644 $file1_blob 0 one
145 100644 $EMPTY_BLOB 0 two
146 EOF
147 test_cmp ls-files.expect ls-files.actual &&
148
149 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
150 q_to_tab >expect <<-EOF &&
151 $BASE
152 100644 $file1_blob 0Q
153 100644 $EMPTY_BLOB 0 two
154 replacements: 0
155 deletions:
156 EOF
157 test_cmp expect actual
158'
159
160test_expect_success 'remove file not in base index' '
161 git update-index --force-remove two &&
162 git ls-files --stage >ls-files.actual &&
163 cat >ls-files.expect <<-EOF &&
164 100644 $file1_blob 0 one
165 EOF
166 test_cmp ls-files.expect ls-files.actual &&
167
168 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
169 q_to_tab >expect <<-EOF &&
170 $BASE
171 100644 $file1_blob 0Q
172 replacements: 0
173 deletions:
174 EOF
175 test_cmp expect actual
176'
177
178test_expect_success 'remove file in base index' '
179 git update-index --force-remove one &&
180 git ls-files --stage >ls-files.actual &&
181 test_must_be_empty ls-files.actual &&
182
183 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
184 cat >expect <<-EOF &&
185 $BASE
186 replacements:
187 deletions: 0
188 EOF
189 test_cmp expect actual
190'
191
192test_expect_success 'add original file back' '
193 create_non_racy_file one &&
194 git update-index --add one &&
195 git ls-files --stage >ls-files.actual &&
196 cat >ls-files.expect <<-EOF &&
197 100644 $EMPTY_BLOB 0 one
198 EOF
199 test_cmp ls-files.expect ls-files.actual &&
200
201 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
202 cat >expect <<-EOF &&
203 $BASE
204 100644 $EMPTY_BLOB 0 one
205 replacements:
206 deletions: 0
207 EOF
208 test_cmp expect actual
209'
210
211test_expect_success 'add new file' '
212 create_non_racy_file two &&
213 git update-index --add two &&
214 git ls-files --stage >actual &&
215 cat >expect <<-EOF &&
216 100644 $EMPTY_BLOB 0 one
217 100644 $EMPTY_BLOB 0 two
218 EOF
219 test_cmp expect actual
220'
221
222test_expect_success 'unify index, two files remain' '
223 git update-index --no-split-index &&
224 git ls-files --stage >ls-files.actual &&
225 cat >ls-files.expect <<-EOF &&
226 100644 $EMPTY_BLOB 0 one
227 100644 $EMPTY_BLOB 0 two
228 EOF
229 test_cmp ls-files.expect ls-files.actual &&
230
231 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
232 cat >expect <<-EOF &&
233 not a split index
234 EOF
235 test_cmp expect actual
236'
237
238test_expect_success 'rev-parse --shared-index-path' '
239 test_create_repo split-index &&
240 (
241 cd split-index &&
242 git update-index --split-index &&
243 echo .git/sharedindex* >expect &&
244 git rev-parse --shared-index-path >actual &&
245 test_cmp expect actual &&
246 mkdir subdirectory &&
247 cd subdirectory &&
248 echo ../.git/sharedindex* >expect &&
249 git rev-parse --shared-index-path >actual &&
250 test_cmp expect actual
251 )
252'
253
254test_expect_success 'set core.splitIndex config variable to true' '
255 git config core.splitIndex true &&
256 create_non_racy_file three &&
257 git update-index --add three &&
258 git ls-files --stage >ls-files.actual &&
259 cat >ls-files.expect <<-EOF &&
260 100644 $EMPTY_BLOB 0 one
261 100644 $EMPTY_BLOB 0 three
262 100644 $EMPTY_BLOB 0 two
263 EOF
264 test_cmp ls-files.expect ls-files.actual &&
265 BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
266 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
267 cat >expect <<-EOF &&
268 $BASE
269 replacements:
270 deletions:
271 EOF
272 test_cmp expect actual
273'
274
275test_expect_success 'set core.splitIndex config variable to false' '
276 git config core.splitIndex false &&
277 git update-index --force-remove three &&
278 git ls-files --stage >ls-files.actual &&
279 cat >ls-files.expect <<-EOF &&
280 100644 $EMPTY_BLOB 0 one
281 100644 $EMPTY_BLOB 0 two
282 EOF
283 test_cmp ls-files.expect ls-files.actual &&
284 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
285 cat >expect <<-EOF &&
286 not a split index
287 EOF
288 test_cmp expect actual
289'
290
291test_expect_success 'set core.splitIndex config variable back to true' '
292 git config core.splitIndex true &&
293 create_non_racy_file three &&
294 git update-index --add three &&
295 BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
296 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
297 cat >expect <<-EOF &&
298 $BASE
299 replacements:
300 deletions:
301 EOF
302 test_cmp expect actual &&
303 create_non_racy_file four &&
304 git update-index --add four &&
305 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
306 cat >expect <<-EOF &&
307 $BASE
308 100644 $EMPTY_BLOB 0 four
309 replacements:
310 deletions:
311 EOF
312 test_cmp expect actual
313'
314
315test_expect_success 'check behavior with splitIndex.maxPercentChange unset' '
316 git config --unset splitIndex.maxPercentChange &&
317 create_non_racy_file five &&
318 git update-index --add five &&
319 BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
320 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
321 cat >expect <<-EOF &&
322 $BASE
323 replacements:
324 deletions:
325 EOF
326 test_cmp expect actual &&
327 create_non_racy_file six &&
328 git update-index --add six &&
329 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
330 cat >expect <<-EOF &&
331 $BASE
332 100644 $EMPTY_BLOB 0 six
333 replacements:
334 deletions:
335 EOF
336 test_cmp expect actual
337'
338
339test_expect_success 'check splitIndex.maxPercentChange set to 0' '
340 git config splitIndex.maxPercentChange 0 &&
341 create_non_racy_file seven &&
342 git update-index --add seven &&
343 BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
344 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
345 cat >expect <<-EOF &&
346 $BASE
347 replacements:
348 deletions:
349 EOF
350 test_cmp expect actual &&
351 create_non_racy_file eight &&
352 git update-index --add eight &&
353 BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
354 test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
355 cat >expect <<-EOF &&
356 $BASE
357 replacements:
358 deletions:
359 EOF
360 test_cmp expect actual
361'
362
363test_expect_success 'shared index files expire after 2 weeks by default' '
364 create_non_racy_file ten &&
365 git update-index --add ten &&
366 test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
367 just_under_2_weeks_ago=$((5-14*86400)) &&
368 test-tool chmtime =$just_under_2_weeks_ago .git/sharedindex.* &&
369 create_non_racy_file eleven &&
370 git update-index --add eleven &&
371 test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
372 just_over_2_weeks_ago=$((-1-14*86400)) &&
373 test-tool chmtime =$just_over_2_weeks_ago .git/sharedindex.* &&
374 create_non_racy_file twelve &&
375 git update-index --add twelve &&
376 test $(ls .git/sharedindex.* | wc -l) -le 2
377'
378
379test_expect_success 'check splitIndex.sharedIndexExpire set to 16 days' '
380 git config splitIndex.sharedIndexExpire "16.days.ago" &&
381 test-tool chmtime =$just_over_2_weeks_ago .git/sharedindex.* &&
382 create_non_racy_file thirteen &&
383 git update-index --add thirteen &&
384 test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
385 just_over_16_days_ago=$((-1-16*86400)) &&
386 test-tool chmtime =$just_over_16_days_ago .git/sharedindex.* &&
387 create_non_racy_file fourteen &&
388 git update-index --add fourteen &&
389 test $(ls .git/sharedindex.* | wc -l) -le 2
390'
391
392test_expect_success 'check splitIndex.sharedIndexExpire set to "never" and "now"' '
393 git config splitIndex.sharedIndexExpire never &&
394 just_10_years_ago=$((-365*10*86400)) &&
395 test-tool chmtime =$just_10_years_ago .git/sharedindex.* &&
396 create_non_racy_file fifteen &&
397 git update-index --add fifteen &&
398 test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
399 git config splitIndex.sharedIndexExpire now &&
400 just_1_second_ago=-1 &&
401 test-tool chmtime =$just_1_second_ago .git/sharedindex.* &&
402 create_non_racy_file sixteen &&
403 git update-index --add sixteen &&
404 test $(ls .git/sharedindex.* | wc -l) -le 2
405'
406
407test_expect_success POSIXPERM 'same mode for index & split index' '
408 git init same-mode &&
409 (
410 cd same-mode &&
411 test_commit A &&
412 test_modebits .git/index >index_mode &&
413 test_must_fail git config core.sharedRepository &&
414 git -c core.splitIndex=true status &&
415 shared=$(ls .git/sharedindex.*) &&
416 case "$shared" in
417 *" "*)
418 # we have more than one???
419 false ;;
420 *)
421 test_modebits "$shared" >split_index_mode &&
422 test_cmp index_mode split_index_mode ;;
423 esac
424 )
425'
426
427while read -r mode modebits
428do
429 test_expect_success POSIXPERM "split index respects core.sharedrepository $mode" '
430 # Remove existing shared index files
431 git config core.splitIndex false &&
432 git update-index --force-remove one &&
433 rm -f .git/sharedindex.* &&
434 # Create one new shared index file
435 git config core.sharedrepository "$mode" &&
436 git config core.splitIndex true &&
437 create_non_racy_file one &&
438 git update-index --add one &&
439 echo "$modebits" >expect &&
440 test_modebits .git/index >actual &&
441 test_cmp expect actual &&
442 shared=$(ls .git/sharedindex.*) &&
443 case "$shared" in
444 *" "*)
445 # we have more than one???
446 false ;;
447 *)
448 test_modebits "$shared" >actual &&
449 test_cmp expect actual ;;
450 esac
451 '
452done <<\EOF
4530666 -rw-rw-rw-
4540642 -rw-r---w-
455EOF
456
457test_expect_success POSIXPERM,SANITY 'graceful handling when splitting index is not allowed' '
458 test_create_repo ro &&
459 (
460 cd ro &&
461 test_commit initial &&
462 git update-index --split-index &&
463 test -f .git/sharedindex.*
464 ) &&
465 cp ro/.git/index new-index &&
466 test_when_finished "chmod u+w ro/.git" &&
467 chmod u-w ro/.git &&
468 GIT_INDEX_FILE="$(pwd)/new-index" git -C ro update-index --split-index &&
469 chmod u+w ro/.git &&
470 rm ro/.git/sharedindex.* &&
471 GIT_INDEX_FILE=new-index git ls-files >actual &&
472 echo initial.t >expected &&
473 test_cmp expected actual
474'
475
476test_expect_success 'writing split index with null sha1 does not write cache tree' '
477 git config core.splitIndex true &&
478 git config splitIndex.maxPercentChange 0 &&
479 git commit -m "commit" &&
480 {
481 git ls-tree HEAD &&
482 printf "160000 commit $ZERO_OID\\tbroken\\n"
483 } >broken-tree &&
484 echo "add broken entry" >msg &&
485
486 tree=$(git mktree <broken-tree) &&
487 test_tick &&
488 commit=$(git commit-tree $tree -p HEAD <msg) &&
489 git update-ref HEAD "$commit" &&
490 GIT_ALLOW_NULL_SHA1=1 git reset --hard &&
491 test_might_fail test-tool dump-cache-tree >cache-tree.out &&
492 test_line_count = 0 cache-tree.out
493'
494
495test_expect_success 'do not refresh null base index' '
496 test_create_repo merge &&
497 (
498 cd merge &&
499 test_commit initial &&
500 git checkout -b side-branch &&
501 test_commit extra &&
502 git checkout main &&
503 git update-index --split-index &&
504 test_commit more &&
505 # must not write a new shareindex, or we wont catch the problem
506 git -c splitIndex.maxPercentChange=100 merge --no-edit side-branch 2>err &&
507 # i.e. do not expect warnings like
508 # could not freshen shared index .../shareindex.00000...
509 test_must_be_empty err
510 )
511'
512
513test_expect_success 'reading split index at alternate location' '
514 git init reading-alternate-location &&
515 (
516 cd reading-alternate-location &&
517 >file-in-alternate &&
518 git update-index --split-index --add file-in-alternate
519 ) &&
520 echo file-in-alternate >expect &&
521
522 # Should be able to find the shared index both right next to
523 # the specified split index file ...
524 GIT_INDEX_FILE=./reading-alternate-location/.git/index \
525 git ls-files --cached >actual &&
526 test_cmp expect actual &&
527
528 # ... and, for backwards compatibility, in the current GIT_DIR
529 # as well.
530 mv ./reading-alternate-location/.git/sharedindex.* .git &&
531 GIT_INDEX_FILE=./reading-alternate-location/.git/index \
532 git ls-files --cached >actual &&
533 test_cmp expect actual
534'
535
536test_expect_success 'GIT_TEST_SPLIT_INDEX works' '
537 git init git-test-split-index &&
538 (
539 cd git-test-split-index &&
540 >file &&
541 GIT_TEST_SPLIT_INDEX=1 git update-index --add file &&
542 ls -l .git/sharedindex.* >actual &&
543 test_line_count = 1 actual
544 )
545'
546
547test_done