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Merge branch 'jk/clone-allow-bare-and-o-together'
[thirdparty/git.git] / t / t5318-commit-graph.sh
1 #!/bin/sh
2
3 test_description='commit graph'
4 . ./test-lib.sh
5
6 GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
7
8 test_expect_success 'usage' '
9 test_expect_code 129 git commit-graph write blah 2>err &&
10 test_expect_code 129 git commit-graph write verify
11 '
12
13 test_expect_success 'usage shown without sub-command' '
14 test_expect_code 129 git commit-graph 2>err &&
15 grep usage: err
16 '
17
18 test_expect_success 'usage shown with an error on unknown sub-command' '
19 cat >expect <<-\EOF &&
20 error: unknown subcommand: `unknown'\''
21 EOF
22 test_expect_code 129 git commit-graph unknown 2>stderr &&
23 grep error stderr >actual &&
24 test_cmp expect actual
25 '
26
27 test_expect_success 'setup full repo' '
28 mkdir full &&
29 cd "$TRASH_DIRECTORY/full" &&
30 git init &&
31 git config core.commitGraph true &&
32 objdir=".git/objects"
33 '
34
35 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
36 umask 022
37 '
38
39 test_expect_success 'verify graph with no graph file' '
40 cd "$TRASH_DIRECTORY/full" &&
41 git commit-graph verify
42 '
43
44 test_expect_success 'write graph with no packs' '
45 cd "$TRASH_DIRECTORY/full" &&
46 git commit-graph write --object-dir $objdir &&
47 test_path_is_missing $objdir/info/commit-graph
48 '
49
50 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
51 cd "$TRASH_DIRECTORY/full" &&
52 echo doesnotexist >in &&
53 test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
54 test_i18ngrep "error adding pack" stderr
55 '
56
57 test_expect_success 'create commits and repack' '
58 cd "$TRASH_DIRECTORY/full" &&
59 for i in $(test_seq 3)
60 do
61 test_commit $i &&
62 git branch commits/$i || return 1
63 done &&
64 git repack
65 '
66
67 . "$TEST_DIRECTORY"/lib-commit-graph.sh
68
69 graph_git_behavior 'no graph' full commits/3 commits/1
70
71 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
72 cd "$TRASH_DIRECTORY/full" &&
73 # invalid, non-hex OID
74 echo HEAD >in &&
75 test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
76 test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
77 # non-existent OID
78 echo $ZERO_OID >in &&
79 test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
80 test_i18ngrep "invalid object" stderr &&
81 # valid commit and tree OID
82 git rev-parse HEAD HEAD^{tree} >in &&
83 git commit-graph write --stdin-commits <in &&
84 graph_read_expect 3 generation_data
85 '
86
87 test_expect_success 'write graph' '
88 cd "$TRASH_DIRECTORY/full" &&
89 git commit-graph write &&
90 test_path_is_file $objdir/info/commit-graph &&
91 graph_read_expect "3" generation_data
92 '
93
94 test_expect_success POSIXPERM 'write graph has correct permissions' '
95 test_path_is_file $objdir/info/commit-graph &&
96 echo "-r--r--r--" >expect &&
97 test_modebits $objdir/info/commit-graph >actual &&
98 test_cmp expect actual
99 '
100
101 graph_git_behavior 'graph exists' full commits/3 commits/1
102
103 test_expect_success 'Add more commits' '
104 cd "$TRASH_DIRECTORY/full" &&
105 git reset --hard commits/1 &&
106 for i in $(test_seq 4 5)
107 do
108 test_commit $i &&
109 git branch commits/$i || return 1
110 done &&
111 git reset --hard commits/2 &&
112 for i in $(test_seq 6 7)
113 do
114 test_commit $i &&
115 git branch commits/$i || return 1
116 done &&
117 git reset --hard commits/2 &&
118 git merge commits/4 &&
119 git branch merge/1 &&
120 git reset --hard commits/4 &&
121 git merge commits/6 &&
122 git branch merge/2 &&
123 git reset --hard commits/3 &&
124 git merge commits/5 commits/7 &&
125 git branch merge/3 &&
126 git repack
127 '
128
129 test_expect_success 'commit-graph write progress off for redirected stderr' '
130 cd "$TRASH_DIRECTORY/full" &&
131 git commit-graph write 2>err &&
132 test_must_be_empty err
133 '
134
135 test_expect_success 'commit-graph write force progress on for stderr' '
136 cd "$TRASH_DIRECTORY/full" &&
137 GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
138 test_file_not_empty err
139 '
140
141 test_expect_success 'commit-graph write with the --no-progress option' '
142 cd "$TRASH_DIRECTORY/full" &&
143 git commit-graph write --no-progress 2>err &&
144 test_must_be_empty err
145 '
146
147 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
148 cd "$TRASH_DIRECTORY/full" &&
149 git rev-parse commits/5 >in &&
150 git commit-graph write --stdin-commits <in 2>err &&
151 test_must_be_empty err
152 '
153
154 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
155 cd "$TRASH_DIRECTORY/full" &&
156 git rev-parse commits/5 >in &&
157 GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
158 test_i18ngrep "Collecting commits from input" err
159 '
160
161 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
162 cd "$TRASH_DIRECTORY/full" &&
163 git rev-parse commits/5 >in &&
164 git commit-graph write --stdin-commits --no-progress <in 2>err &&
165 test_must_be_empty err
166 '
167
168 test_expect_success 'commit-graph verify progress off for redirected stderr' '
169 cd "$TRASH_DIRECTORY/full" &&
170 git commit-graph verify 2>err &&
171 test_must_be_empty err
172 '
173
174 test_expect_success 'commit-graph verify force progress on for stderr' '
175 cd "$TRASH_DIRECTORY/full" &&
176 GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
177 test_file_not_empty err
178 '
179
180 test_expect_success 'commit-graph verify with the --no-progress option' '
181 cd "$TRASH_DIRECTORY/full" &&
182 git commit-graph verify --no-progress 2>err &&
183 test_must_be_empty err
184 '
185
186 # Current graph structure:
187 #
188 # __M3___
189 # / | \
190 # 3 M1 5 M2 7
191 # |/ \|/ \|
192 # 2 4 6
193 # |___/____/
194 # 1
195
196 test_expect_success 'write graph with merges' '
197 cd "$TRASH_DIRECTORY/full" &&
198 git commit-graph write &&
199 test_path_is_file $objdir/info/commit-graph &&
200 graph_read_expect "10" "generation_data extra_edges"
201 '
202
203 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
204 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
205 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
206
207 test_expect_success 'Add one more commit' '
208 cd "$TRASH_DIRECTORY/full" &&
209 test_commit 8 &&
210 git branch commits/8 &&
211 ls $objdir/pack | grep idx >existing-idx &&
212 git repack &&
213 ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
214 '
215
216 # Current graph structure:
217 #
218 # 8
219 # |
220 # __M3___
221 # / | \
222 # 3 M1 5 M2 7
223 # |/ \|/ \|
224 # 2 4 6
225 # |___/____/
226 # 1
227
228 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
229 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
230
231 test_expect_success 'write graph with new commit' '
232 cd "$TRASH_DIRECTORY/full" &&
233 git commit-graph write &&
234 test_path_is_file $objdir/info/commit-graph &&
235 graph_read_expect "11" "generation_data extra_edges"
236 '
237
238 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
239 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
240
241 test_expect_success 'write graph with nothing new' '
242 cd "$TRASH_DIRECTORY/full" &&
243 git commit-graph write &&
244 test_path_is_file $objdir/info/commit-graph &&
245 graph_read_expect "11" "generation_data extra_edges"
246 '
247
248 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
249 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
250
251 test_expect_success 'build graph from latest pack with closure' '
252 cd "$TRASH_DIRECTORY/full" &&
253 cat new-idx | git commit-graph write --stdin-packs &&
254 test_path_is_file $objdir/info/commit-graph &&
255 graph_read_expect "9" "generation_data extra_edges"
256 '
257
258 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
259 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
260
261 test_expect_success 'build graph from commits with closure' '
262 cd "$TRASH_DIRECTORY/full" &&
263 git tag -a -m "merge" tag/merge merge/2 &&
264 git rev-parse tag/merge >commits-in &&
265 git rev-parse merge/1 >>commits-in &&
266 cat commits-in | git commit-graph write --stdin-commits &&
267 test_path_is_file $objdir/info/commit-graph &&
268 graph_read_expect "6" "generation_data"
269 '
270
271 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
272 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
273
274 test_expect_success 'build graph from commits with append' '
275 cd "$TRASH_DIRECTORY/full" &&
276 git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
277 test_path_is_file $objdir/info/commit-graph &&
278 graph_read_expect "10" "generation_data extra_edges"
279 '
280
281 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
282 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
283
284 test_expect_success 'build graph using --reachable' '
285 cd "$TRASH_DIRECTORY/full" &&
286 git commit-graph write --reachable &&
287 test_path_is_file $objdir/info/commit-graph &&
288 graph_read_expect "11" "generation_data extra_edges"
289 '
290
291 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
292 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
293
294 test_expect_success 'setup bare repo' '
295 cd "$TRASH_DIRECTORY" &&
296 git clone --bare --no-local full bare &&
297 cd bare &&
298 git config core.commitGraph true &&
299 baredir="./objects"
300 '
301
302 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
303 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
304
305 test_expect_success 'write graph in bare repo' '
306 cd "$TRASH_DIRECTORY/bare" &&
307 git commit-graph write &&
308 test_path_is_file $baredir/info/commit-graph &&
309 graph_read_expect "11" "generation_data extra_edges"
310 '
311
312 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
313 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
314
315 test_expect_success 'perform fast-forward merge in full repo' '
316 cd "$TRASH_DIRECTORY/full" &&
317 git checkout -b merge-5-to-8 commits/5 &&
318 git merge commits/8 &&
319 git show-ref -s merge-5-to-8 >output &&
320 git show-ref -s commits/8 >expect &&
321 test_cmp expect output
322 '
323
324 test_expect_success 'check that gc computes commit-graph' '
325 cd "$TRASH_DIRECTORY/full" &&
326 git commit --allow-empty -m "blank" &&
327 git commit-graph write --reachable &&
328 cp $objdir/info/commit-graph commit-graph-before-gc &&
329 git reset --hard HEAD~1 &&
330 git config gc.writeCommitGraph true &&
331 git gc &&
332 cp $objdir/info/commit-graph commit-graph-after-gc &&
333 ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
334 git commit-graph write --reachable &&
335 test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
336 '
337
338 test_expect_success 'replace-objects invalidates commit-graph' '
339 cd "$TRASH_DIRECTORY" &&
340 test_when_finished rm -rf replace &&
341 git clone full replace &&
342 (
343 cd replace &&
344 git commit-graph write --reachable &&
345 test_path_is_file .git/objects/info/commit-graph &&
346 git replace HEAD~1 HEAD~2 &&
347 graph_git_two_modes "commit-graph verify" &&
348 git -c core.commitGraph=false log >expect &&
349 git -c core.commitGraph=true log >actual &&
350 test_cmp expect actual &&
351 git commit-graph write --reachable &&
352 git -c core.commitGraph=false --no-replace-objects log >expect &&
353 git -c core.commitGraph=true --no-replace-objects log >actual &&
354 test_cmp expect actual &&
355 rm -rf .git/objects/info/commit-graph &&
356 git commit-graph write --reachable &&
357 test_path_is_file .git/objects/info/commit-graph
358 )
359 '
360
361 test_expect_success 'commit grafts invalidate commit-graph' '
362 cd "$TRASH_DIRECTORY" &&
363 test_when_finished rm -rf graft &&
364 git clone --template= full graft &&
365 (
366 cd graft &&
367 git commit-graph write --reachable &&
368 test_path_is_file .git/objects/info/commit-graph &&
369 H1=$(git rev-parse --verify HEAD~1) &&
370 H3=$(git rev-parse --verify HEAD~3) &&
371 mkdir .git/info &&
372 echo "$H1 $H3" >.git/info/grafts &&
373 git -c core.commitGraph=false log >expect &&
374 git -c core.commitGraph=true log >actual &&
375 test_cmp expect actual &&
376 git commit-graph write --reachable &&
377 git -c core.commitGraph=false --no-replace-objects log >expect &&
378 git -c core.commitGraph=true --no-replace-objects log >actual &&
379 test_cmp expect actual &&
380 rm -rf .git/objects/info/commit-graph &&
381 git commit-graph write --reachable &&
382 test_path_is_missing .git/objects/info/commit-graph
383 )
384 '
385
386 test_expect_success 'replace-objects invalidates commit-graph' '
387 cd "$TRASH_DIRECTORY" &&
388 test_when_finished rm -rf shallow &&
389 git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
390 (
391 cd shallow &&
392 git commit-graph write --reachable &&
393 test_path_is_missing .git/objects/info/commit-graph &&
394 git fetch origin --unshallow &&
395 git commit-graph write --reachable &&
396 test_path_is_file .git/objects/info/commit-graph
397 )
398 '
399
400 test_expect_success 'warn on improper hash version' '
401 git init --object-format=sha1 sha1 &&
402 (
403 cd sha1 &&
404 test_commit 1 &&
405 git commit-graph write --reachable &&
406 mv .git/objects/info/commit-graph ../cg-sha1
407 ) &&
408 git init --object-format=sha256 sha256 &&
409 (
410 cd sha256 &&
411 test_commit 1 &&
412 git commit-graph write --reachable &&
413 mv .git/objects/info/commit-graph ../cg-sha256
414 ) &&
415 (
416 cd sha1 &&
417 mv ../cg-sha256 .git/objects/info/commit-graph &&
418 git log -1 2>err &&
419 test_i18ngrep "commit-graph hash version 2 does not match version 1" err
420 ) &&
421 (
422 cd sha256 &&
423 mv ../cg-sha1 .git/objects/info/commit-graph &&
424 git log -1 2>err &&
425 test_i18ngrep "commit-graph hash version 1 does not match version 2" err
426 )
427 '
428
429 test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow chunk' '
430 cd "$TRASH_DIRECTORY/full" &&
431 UNIX_EPOCH_ZERO="@0 +0000" &&
432 FUTURE_DATE="@4147483646 +0000" &&
433 rm -f .git/objects/info/commit-graph &&
434 test_commit --date "$FUTURE_DATE" future-1 &&
435 test_commit --date "$UNIX_EPOCH_ZERO" old-1 &&
436 git commit-graph write --reachable &&
437 test_commit --date "$FUTURE_DATE" future-2 &&
438 test_commit --date "$UNIX_EPOCH_ZERO" old-2 &&
439 git commit-graph write --reachable --split=no-merge &&
440 test_commit extra &&
441 git commit-graph write --reachable --split=no-merge &&
442 git commit-graph write --reachable &&
443 graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
444 mv .git/objects/info/commit-graph commit-graph-upgraded &&
445 git commit-graph write --reachable &&
446 graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
447 test_cmp .git/objects/info/commit-graph commit-graph-upgraded
448 '
449
450 # the verify tests below expect the commit-graph to contain
451 # exactly the commits reachable from the commits/8 branch.
452 # If the file changes the set of commits in the list, then the
453 # offsets into the binary file will result in different edits
454 # and the tests will likely break.
455
456 test_expect_success 'git commit-graph verify' '
457 cd "$TRASH_DIRECTORY/full" &&
458 git rev-parse commits/8 | git -c commitGraph.generationVersion=1 commit-graph write --stdin-commits &&
459 git commit-graph verify >output &&
460 graph_read_expect 9 extra_edges 1
461 '
462
463 NUM_COMMITS=9
464 NUM_OCTOPUS_EDGES=2
465 HASH_LEN="$(test_oid rawsz)"
466 GRAPH_BYTE_VERSION=4
467 GRAPH_BYTE_HASH=5
468 GRAPH_BYTE_CHUNK_COUNT=6
469 GRAPH_CHUNK_LOOKUP_OFFSET=8
470 GRAPH_CHUNK_LOOKUP_WIDTH=12
471 GRAPH_CHUNK_LOOKUP_ROWS=5
472 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
473 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
474 1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
475 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
476 2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
477 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
478 $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
479 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
480 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
481 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
482 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
483 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
484 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
485 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
486 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
487 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
488 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
489 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
490 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
491 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
492 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
493 $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
494 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
495 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
496
497 corrupt_graph_setup() {
498 cd "$TRASH_DIRECTORY/full" &&
499 test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
500 cp $objdir/info/commit-graph commit-graph-backup &&
501 chmod u+w $objdir/info/commit-graph
502 }
503
504 corrupt_graph_verify() {
505 grepstr=$1
506 test_must_fail git commit-graph verify 2>test_err &&
507 grep -v "^+" test_err >err &&
508 test_i18ngrep "$grepstr" err &&
509 if test "$2" != "no-copy"
510 then
511 cp $objdir/info/commit-graph commit-graph-pre-write-test
512 fi &&
513 git status --short &&
514 GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
515 chmod u+w $objdir/info/commit-graph &&
516 git commit-graph verify
517 }
518
519 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
520 # Manipulates the commit-graph file at the position
521 # by inserting the data, optionally zeroing the file
522 # starting at <zero_pos>, then runs 'git commit-graph verify'
523 # and places the output in the file 'err'. Test 'err' for
524 # the given string.
525 corrupt_graph_and_verify() {
526 pos=$1
527 data="${2:-\0}"
528 grepstr=$3
529 corrupt_graph_setup &&
530 orig_size=$(wc -c < $objdir/info/commit-graph) &&
531 zero_pos=${4:-${orig_size}} &&
532 printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
533 dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
534 test-tool genzeros $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
535 corrupt_graph_verify "$grepstr"
536
537 }
538
539 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
540 corrupt_graph_setup &&
541 chmod 000 $objdir/info/commit-graph &&
542 corrupt_graph_verify "Could not open" "no-copy"
543 '
544
545 test_expect_success 'detect too small' '
546 corrupt_graph_setup &&
547 echo "a small graph" >$objdir/info/commit-graph &&
548 corrupt_graph_verify "too small"
549 '
550
551 test_expect_success 'detect bad signature' '
552 corrupt_graph_and_verify 0 "\0" \
553 "graph signature"
554 '
555
556 test_expect_success 'detect bad version' '
557 corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
558 "graph version"
559 '
560
561 test_expect_success 'detect bad hash version' '
562 corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
563 "hash version"
564 '
565
566 test_expect_success 'detect low chunk count' '
567 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
568 "final chunk has non-zero id"
569 '
570
571 test_expect_success 'detect missing OID fanout chunk' '
572 corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
573 "missing the OID Fanout chunk"
574 '
575
576 test_expect_success 'detect missing OID lookup chunk' '
577 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
578 "missing the OID Lookup chunk"
579 '
580
581 test_expect_success 'detect missing commit data chunk' '
582 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
583 "missing the Commit Data chunk"
584 '
585
586 test_expect_success 'detect incorrect fanout' '
587 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
588 "fanout value"
589 '
590
591 test_expect_success 'detect incorrect fanout final value' '
592 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
593 "fanout value"
594 '
595
596 test_expect_success 'detect incorrect OID order' '
597 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
598 "incorrect OID order"
599 '
600
601 test_expect_success 'detect OID not in object database' '
602 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
603 "from object database"
604 '
605
606 test_expect_success 'detect incorrect tree OID' '
607 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
608 "root tree OID for commit"
609 '
610
611 test_expect_success 'detect incorrect parent int-id' '
612 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
613 "invalid parent"
614 '
615
616 test_expect_success 'detect extra parent int-id' '
617 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
618 "is too long"
619 '
620
621 test_expect_success 'detect wrong parent' '
622 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
623 "commit-graph parent for"
624 '
625
626 test_expect_success 'detect incorrect generation number' '
627 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
628 "generation for commit"
629 '
630
631 test_expect_success 'detect incorrect generation number' '
632 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
633 "non-zero generation number"
634 '
635
636 test_expect_success 'detect incorrect commit date' '
637 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
638 "commit date"
639 '
640
641 test_expect_success 'detect incorrect parent for octopus merge' '
642 corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
643 "invalid parent"
644 '
645
646 test_expect_success 'detect invalid checksum hash' '
647 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
648 "incorrect checksum"
649 '
650
651 test_expect_success 'detect incorrect chunk count' '
652 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
653 "commit-graph file is too small to hold [0-9]* chunks" \
654 $GRAPH_CHUNK_LOOKUP_OFFSET
655 '
656
657 test_expect_success 'git fsck (checks commit-graph when config set to true)' '
658 cd "$TRASH_DIRECTORY/full" &&
659 git fsck &&
660 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
661 "incorrect checksum" &&
662 cp commit-graph-pre-write-test $objdir/info/commit-graph &&
663 test_must_fail git -c core.commitGraph=true fsck
664 '
665
666 test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
667 cd "$TRASH_DIRECTORY/full" &&
668 git fsck &&
669 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
670 "incorrect checksum" &&
671 cp commit-graph-pre-write-test $objdir/info/commit-graph &&
672 git -c core.commitGraph=false fsck
673 '
674
675 test_expect_success 'git fsck (checks commit-graph when config unset)' '
676 cd "$TRASH_DIRECTORY/full" &&
677 test_when_finished "git config core.commitGraph true" &&
678
679 git fsck &&
680 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
681 "incorrect checksum" &&
682 test_unconfig core.commitGraph &&
683 cp commit-graph-pre-write-test $objdir/info/commit-graph &&
684 test_must_fail git fsck
685 '
686
687 test_expect_success 'setup non-the_repository tests' '
688 rm -rf repo &&
689 git init repo &&
690 test_commit -C repo one &&
691 test_commit -C repo two &&
692 git -C repo config core.commitGraph true &&
693 git -C repo rev-parse two | \
694 git -C repo commit-graph write --stdin-commits
695 '
696
697 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
698 test-tool repository parse_commit_in_graph \
699 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
700 {
701 git -C repo log --pretty=format:"%ct " -1 &&
702 git -C repo rev-parse one
703 } >expect &&
704 test_cmp expect actual &&
705
706 test-tool repository parse_commit_in_graph \
707 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
708 git -C repo log --pretty="%ct" -1 one >expect &&
709 test_cmp expect actual
710 '
711
712 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
713 test-tool repository get_commit_tree_in_graph \
714 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
715 git -C repo rev-parse two^{tree} >expect &&
716 test_cmp expect actual &&
717
718 test-tool repository get_commit_tree_in_graph \
719 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
720 git -C repo rev-parse one^{tree} >expect &&
721 test_cmp expect actual
722 '
723
724 test_expect_success 'corrupt commit-graph write (broken parent)' '
725 rm -rf repo &&
726 git init repo &&
727 (
728 cd repo &&
729 empty="$(git mktree </dev/null)" &&
730 cat >broken <<-EOF &&
731 tree $empty
732 parent $ZERO_OID
733 author whatever <whatever@example.com> 1234 -0000
734 committer whatever <whatever@example.com> 1234 -0000
735
736 broken commit
737 EOF
738 broken="$(git hash-object -w -t commit --literally broken)" &&
739 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
740 test_must_fail git commit-graph write --stdin-commits \
741 <good 2>test_err &&
742 test_i18ngrep "unable to parse commit" test_err
743 )
744 '
745
746 test_expect_success 'corrupt commit-graph write (missing tree)' '
747 rm -rf repo &&
748 git init repo &&
749 (
750 cd repo &&
751 tree="$(git mktree </dev/null)" &&
752 cat >broken <<-EOF &&
753 parent $ZERO_OID
754 author whatever <whatever@example.com> 1234 -0000
755 committer whatever <whatever@example.com> 1234 -0000
756
757 broken commit
758 EOF
759 broken="$(git hash-object -w -t commit --literally broken)" &&
760 git commit-tree -p "$broken" -m "good" "$tree" >good &&
761 test_must_fail git commit-graph write --stdin-commits \
762 <good 2>test_err &&
763 test_i18ngrep "unable to parse commit" test_err
764 )
765 '
766
767 # We test the overflow-related code with the following repo history:
768 #
769 # 4:F - 5:N - 6:U
770 # / \
771 # 1:U - 2:N - 3:U M:N
772 # \ /
773 # 7:N - 8:F - 9:N
774 #
775 # Here the commits denoted by U have committer date of zero seconds
776 # since Unix epoch, the commits denoted by N have committer date
777 # starting from 1112354055 seconds since Unix epoch (default committer
778 # date for the test suite), and the commits denoted by F have committer
779 # date of (2 ^ 31 - 2) seconds since Unix epoch.
780 #
781 # The largest offset observed is 2 ^ 31, just large enough to overflow.
782 #
783
784 test_expect_success 'set up and verify repo with generation data overflow chunk' '
785 objdir=".git/objects" &&
786 UNIX_EPOCH_ZERO="@0 +0000" &&
787 FUTURE_DATE="@2147483646 +0000" &&
788 cd "$TRASH_DIRECTORY" &&
789 mkdir repo &&
790 cd repo &&
791 git init &&
792 test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
793 test_commit 2 &&
794 test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
795 git commit-graph write --reachable &&
796 graph_read_expect 3 generation_data &&
797 test_commit --date "$FUTURE_DATE" 4 &&
798 test_commit 5 &&
799 test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
800 git branch left &&
801 git reset --hard 3 &&
802 test_commit 7 &&
803 test_commit --date "$FUTURE_DATE" 8 &&
804 test_commit 9 &&
805 git branch right &&
806 git reset --hard 3 &&
807 test_merge M left right &&
808 git commit-graph write --reachable &&
809 graph_read_expect 10 "generation_data generation_data_overflow" &&
810 git commit-graph verify
811 '
812
813 graph_git_behavior 'generation data overflow chunk repo' repo left right
814
815 test_expect_success 'overflow during generation version upgrade' '
816 git init overflow-v2-upgrade &&
817 (
818 cd overflow-v2-upgrade &&
819
820 # This commit will have a date at two seconds past the Epoch,
821 # and a (v1) generation number of 1, since it is a root commit.
822 #
823 # The offset will then be computed as 1-2, which will underflow
824 # to 2^31, which is greater than the v2 offset small limit of
825 # 2^31-1.
826 #
827 # This is sufficient to need a large offset table for the v2
828 # generation numbers.
829 test_commit --date "@2 +0000" base &&
830 git repack -d &&
831
832 # Test that upgrading from generation v1 to v2 correctly
833 # produces the overflow table.
834 git -c commitGraph.generationVersion=1 commit-graph write &&
835 git -c commitGraph.generationVersion=2 commit-graph write \
836 --changed-paths &&
837
838 git rev-list --all
839 )
840 '
841
842 test_done