Merge remote-tracking branch 'paulus/master' into pm/gitk-update
[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 'setup full repo' '
9         mkdir full &&
10         cd "$TRASH_DIRECTORY/full" &&
11         git init &&
12         git config core.commitGraph true &&
13         objdir=".git/objects" &&
14
15         test_oid_cache <<-EOF
16         oid_version sha1:1
17         oid_version sha256:2
18         EOF
19 '
20
21 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
22         umask 022
23 '
24
25 test_expect_success 'verify graph with no graph file' '
26         cd "$TRASH_DIRECTORY/full" &&
27         git commit-graph verify
28 '
29
30 test_expect_success 'write graph with no packs' '
31         cd "$TRASH_DIRECTORY/full" &&
32         git commit-graph write --object-dir $objdir &&
33         test_path_is_missing $objdir/info/commit-graph
34 '
35
36 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
37         cd "$TRASH_DIRECTORY/full" &&
38         echo doesnotexist >in &&
39         test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
40         test_i18ngrep "error adding pack" stderr
41 '
42
43 test_expect_success 'create commits and repack' '
44         cd "$TRASH_DIRECTORY/full" &&
45         for i in $(test_seq 3)
46         do
47                 test_commit $i &&
48                 git branch commits/$i
49         done &&
50         git repack
51 '
52
53 graph_git_two_modes() {
54         git -c core.commitGraph=true $1 >output
55         git -c core.commitGraph=false $1 >expect
56         test_cmp expect output
57 }
58
59 graph_git_behavior() {
60         MSG=$1
61         DIR=$2
62         BRANCH=$3
63         COMPARE=$4
64         test_expect_success "check normal git operations: $MSG" '
65                 cd "$TRASH_DIRECTORY/$DIR" &&
66                 graph_git_two_modes "log --oneline $BRANCH" &&
67                 graph_git_two_modes "log --topo-order $BRANCH" &&
68                 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
69                 graph_git_two_modes "branch -vv" &&
70                 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
71         '
72 }
73
74 graph_git_behavior 'no graph' full commits/3 commits/1
75
76 graph_read_expect() {
77         OPTIONAL=""
78         NUM_CHUNKS=3
79         if test ! -z $2
80         then
81                 OPTIONAL=" $2"
82                 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
83         fi
84         cat >expect <<- EOF
85         header: 43475048 1 $(test_oid oid_version) $NUM_CHUNKS 0
86         num_commits: $1
87         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
88         EOF
89         test-tool read-graph >output &&
90         test_cmp expect output
91 }
92
93 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
94         cd "$TRASH_DIRECTORY/full" &&
95         # invalid, non-hex OID
96         echo HEAD >in &&
97         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
98         test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
99         # non-existent OID
100         echo $ZERO_OID >in &&
101         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
102         test_i18ngrep "invalid object" stderr &&
103         # valid commit and tree OID
104         git rev-parse HEAD HEAD^{tree} >in &&
105         git commit-graph write --stdin-commits <in &&
106         graph_read_expect 3
107 '
108
109 test_expect_success 'write graph' '
110         cd "$TRASH_DIRECTORY/full" &&
111         git commit-graph write &&
112         test_path_is_file $objdir/info/commit-graph &&
113         graph_read_expect "3"
114 '
115
116 test_expect_success POSIXPERM 'write graph has correct permissions' '
117         test_path_is_file $objdir/info/commit-graph &&
118         echo "-r--r--r--" >expect &&
119         test_modebits $objdir/info/commit-graph >actual &&
120         test_cmp expect actual
121 '
122
123 graph_git_behavior 'graph exists' full commits/3 commits/1
124
125 test_expect_success 'Add more commits' '
126         cd "$TRASH_DIRECTORY/full" &&
127         git reset --hard commits/1 &&
128         for i in $(test_seq 4 5)
129         do
130                 test_commit $i &&
131                 git branch commits/$i
132         done &&
133         git reset --hard commits/2 &&
134         for i in $(test_seq 6 7)
135         do
136                 test_commit $i &&
137                 git branch commits/$i
138         done &&
139         git reset --hard commits/2 &&
140         git merge commits/4 &&
141         git branch merge/1 &&
142         git reset --hard commits/4 &&
143         git merge commits/6 &&
144         git branch merge/2 &&
145         git reset --hard commits/3 &&
146         git merge commits/5 commits/7 &&
147         git branch merge/3 &&
148         git repack
149 '
150
151 test_expect_success 'commit-graph write progress off for redirected stderr' '
152         cd "$TRASH_DIRECTORY/full" &&
153         git commit-graph write 2>err &&
154         test_must_be_empty err
155 '
156
157 test_expect_success 'commit-graph write force progress on for stderr' '
158         cd "$TRASH_DIRECTORY/full" &&
159         GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
160         test_file_not_empty err
161 '
162
163 test_expect_success 'commit-graph write with the --no-progress option' '
164         cd "$TRASH_DIRECTORY/full" &&
165         git commit-graph write --no-progress 2>err &&
166         test_must_be_empty err
167 '
168
169 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
170         cd "$TRASH_DIRECTORY/full" &&
171         git rev-parse commits/5 >in &&
172         git commit-graph write --stdin-commits <in 2>err &&
173         test_must_be_empty err
174 '
175
176 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
177         cd "$TRASH_DIRECTORY/full" &&
178         git rev-parse commits/5 >in &&
179         GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
180         test_i18ngrep "Collecting commits from input" err
181 '
182
183 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
184         cd "$TRASH_DIRECTORY/full" &&
185         git rev-parse commits/5 >in &&
186         git commit-graph write --stdin-commits --no-progress <in 2>err &&
187         test_must_be_empty err
188 '
189
190 test_expect_success 'commit-graph verify progress off for redirected stderr' '
191         cd "$TRASH_DIRECTORY/full" &&
192         git commit-graph verify 2>err &&
193         test_must_be_empty err
194 '
195
196 test_expect_success 'commit-graph verify force progress on for stderr' '
197         cd "$TRASH_DIRECTORY/full" &&
198         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
199         test_file_not_empty err
200 '
201
202 test_expect_success 'commit-graph verify with the --no-progress option' '
203         cd "$TRASH_DIRECTORY/full" &&
204         git commit-graph verify --no-progress 2>err &&
205         test_must_be_empty err
206 '
207
208 # Current graph structure:
209 #
210 #   __M3___
211 #  /   |   \
212 # 3 M1 5 M2 7
213 # |/  \|/  \|
214 # 2    4    6
215 # |___/____/
216 # 1
217
218 test_expect_success 'write graph with merges' '
219         cd "$TRASH_DIRECTORY/full" &&
220         git commit-graph write &&
221         test_path_is_file $objdir/info/commit-graph &&
222         graph_read_expect "10" "extra_edges"
223 '
224
225 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
226 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
227 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
228
229 test_expect_success 'Add one more commit' '
230         cd "$TRASH_DIRECTORY/full" &&
231         test_commit 8 &&
232         git branch commits/8 &&
233         ls $objdir/pack | grep idx >existing-idx &&
234         git repack &&
235         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
236 '
237
238 # Current graph structure:
239 #
240 #      8
241 #      |
242 #   __M3___
243 #  /   |   \
244 # 3 M1 5 M2 7
245 # |/  \|/  \|
246 # 2    4    6
247 # |___/____/
248 # 1
249
250 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
251 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
252
253 test_expect_success 'write graph with new commit' '
254         cd "$TRASH_DIRECTORY/full" &&
255         git commit-graph write &&
256         test_path_is_file $objdir/info/commit-graph &&
257         graph_read_expect "11" "extra_edges"
258 '
259
260 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
261 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
262
263 test_expect_success 'write graph with nothing new' '
264         cd "$TRASH_DIRECTORY/full" &&
265         git commit-graph write &&
266         test_path_is_file $objdir/info/commit-graph &&
267         graph_read_expect "11" "extra_edges"
268 '
269
270 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
271 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
272
273 test_expect_success 'build graph from latest pack with closure' '
274         cd "$TRASH_DIRECTORY/full" &&
275         cat new-idx | git commit-graph write --stdin-packs &&
276         test_path_is_file $objdir/info/commit-graph &&
277         graph_read_expect "9" "extra_edges"
278 '
279
280 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
281 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
282
283 test_expect_success 'build graph from commits with closure' '
284         cd "$TRASH_DIRECTORY/full" &&
285         git tag -a -m "merge" tag/merge merge/2 &&
286         git rev-parse tag/merge >commits-in &&
287         git rev-parse merge/1 >>commits-in &&
288         cat commits-in | git commit-graph write --stdin-commits &&
289         test_path_is_file $objdir/info/commit-graph &&
290         graph_read_expect "6"
291 '
292
293 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
294 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
295
296 test_expect_success 'build graph from commits with append' '
297         cd "$TRASH_DIRECTORY/full" &&
298         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
299         test_path_is_file $objdir/info/commit-graph &&
300         graph_read_expect "10" "extra_edges"
301 '
302
303 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
304 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
305
306 test_expect_success 'build graph using --reachable' '
307         cd "$TRASH_DIRECTORY/full" &&
308         git commit-graph write --reachable &&
309         test_path_is_file $objdir/info/commit-graph &&
310         graph_read_expect "11" "extra_edges"
311 '
312
313 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
314 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
315
316 test_expect_success 'setup bare repo' '
317         cd "$TRASH_DIRECTORY" &&
318         git clone --bare --no-local full bare &&
319         cd bare &&
320         git config core.commitGraph true &&
321         baredir="./objects"
322 '
323
324 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
325 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
326
327 test_expect_success 'write graph in bare repo' '
328         cd "$TRASH_DIRECTORY/bare" &&
329         git commit-graph write &&
330         test_path_is_file $baredir/info/commit-graph &&
331         graph_read_expect "11" "extra_edges"
332 '
333
334 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
335 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
336
337 test_expect_success 'perform fast-forward merge in full repo' '
338         cd "$TRASH_DIRECTORY/full" &&
339         git checkout -b merge-5-to-8 commits/5 &&
340         git merge commits/8 &&
341         git show-ref -s merge-5-to-8 >output &&
342         git show-ref -s commits/8 >expect &&
343         test_cmp expect output
344 '
345
346 test_expect_success 'check that gc computes commit-graph' '
347         cd "$TRASH_DIRECTORY/full" &&
348         git commit --allow-empty -m "blank" &&
349         git commit-graph write --reachable &&
350         cp $objdir/info/commit-graph commit-graph-before-gc &&
351         git reset --hard HEAD~1 &&
352         git config gc.writeCommitGraph true &&
353         git gc &&
354         cp $objdir/info/commit-graph commit-graph-after-gc &&
355         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
356         git commit-graph write --reachable &&
357         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
358 '
359
360 test_expect_success 'replace-objects invalidates commit-graph' '
361         cd "$TRASH_DIRECTORY" &&
362         test_when_finished rm -rf replace &&
363         git clone full replace &&
364         (
365                 cd replace &&
366                 git commit-graph write --reachable &&
367                 test_path_is_file .git/objects/info/commit-graph &&
368                 git replace HEAD~1 HEAD~2 &&
369                 git -c core.commitGraph=false log >expect &&
370                 git -c core.commitGraph=true log >actual &&
371                 test_cmp expect actual &&
372                 git commit-graph write --reachable &&
373                 git -c core.commitGraph=false --no-replace-objects log >expect &&
374                 git -c core.commitGraph=true --no-replace-objects log >actual &&
375                 test_cmp expect actual &&
376                 rm -rf .git/objects/info/commit-graph &&
377                 git commit-graph write --reachable &&
378                 test_path_is_file .git/objects/info/commit-graph
379         )
380 '
381
382 test_expect_success 'commit grafts invalidate commit-graph' '
383         cd "$TRASH_DIRECTORY" &&
384         test_when_finished rm -rf graft &&
385         git clone full graft &&
386         (
387                 cd graft &&
388                 git commit-graph write --reachable &&
389                 test_path_is_file .git/objects/info/commit-graph &&
390                 H1=$(git rev-parse --verify HEAD~1) &&
391                 H3=$(git rev-parse --verify HEAD~3) &&
392                 echo "$H1 $H3" >.git/info/grafts &&
393                 git -c core.commitGraph=false log >expect &&
394                 git -c core.commitGraph=true log >actual &&
395                 test_cmp expect actual &&
396                 git commit-graph write --reachable &&
397                 git -c core.commitGraph=false --no-replace-objects log >expect &&
398                 git -c core.commitGraph=true --no-replace-objects log >actual &&
399                 test_cmp expect actual &&
400                 rm -rf .git/objects/info/commit-graph &&
401                 git commit-graph write --reachable &&
402                 test_path_is_missing .git/objects/info/commit-graph
403         )
404 '
405
406 test_expect_success 'replace-objects invalidates commit-graph' '
407         cd "$TRASH_DIRECTORY" &&
408         test_when_finished rm -rf shallow &&
409         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
410         (
411                 cd shallow &&
412                 git commit-graph write --reachable &&
413                 test_path_is_missing .git/objects/info/commit-graph &&
414                 git fetch origin --unshallow &&
415                 git commit-graph write --reachable &&
416                 test_path_is_file .git/objects/info/commit-graph
417         )
418 '
419
420 test_expect_success 'warn on improper hash version' '
421         git init --object-format=sha1 sha1 &&
422         (
423                 cd sha1 &&
424                 test_commit 1 &&
425                 git commit-graph write --reachable &&
426                 mv .git/objects/info/commit-graph ../cg-sha1
427         ) &&
428         git init --object-format=sha256 sha256 &&
429         (
430                 cd sha256 &&
431                 test_commit 1 &&
432                 git commit-graph write --reachable &&
433                 mv .git/objects/info/commit-graph ../cg-sha256
434         ) &&
435         (
436                 cd sha1 &&
437                 mv ../cg-sha256 .git/objects/info/commit-graph &&
438                 git log -1 2>err &&
439                 test_i18ngrep "commit-graph hash version 2 does not match version 1" err
440         ) &&
441         (
442                 cd sha256 &&
443                 mv ../cg-sha1 .git/objects/info/commit-graph &&
444                 git log -1 2>err &&
445                 test_i18ngrep "commit-graph hash version 1 does not match version 2" err
446         )
447 '
448
449 # the verify tests below expect the commit-graph to contain
450 # exactly the commits reachable from the commits/8 branch.
451 # If the file changes the set of commits in the list, then the
452 # offsets into the binary file will result in different edits
453 # and the tests will likely break.
454
455 test_expect_success 'git commit-graph verify' '
456         cd "$TRASH_DIRECTORY/full" &&
457         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
458         git commit-graph verify >output
459 '
460
461 NUM_COMMITS=9
462 NUM_OCTOPUS_EDGES=2
463 HASH_LEN="$(test_oid rawsz)"
464 GRAPH_BYTE_VERSION=4
465 GRAPH_BYTE_HASH=5
466 GRAPH_BYTE_CHUNK_COUNT=6
467 GRAPH_CHUNK_LOOKUP_OFFSET=8
468 GRAPH_CHUNK_LOOKUP_WIDTH=12
469 GRAPH_CHUNK_LOOKUP_ROWS=5
470 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
471 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
472                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
473 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
474                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
475 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
476                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
477 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
478 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
479 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
480 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
481 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
482 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
483 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
484 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
485 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
486 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
487 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
488 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
489 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
490 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
491                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
492 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
493 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
494
495 corrupt_graph_setup() {
496         cd "$TRASH_DIRECTORY/full" &&
497         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
498         cp $objdir/info/commit-graph commit-graph-backup &&
499         chmod u+w $objdir/info/commit-graph
500 }
501
502 corrupt_graph_verify() {
503         grepstr=$1
504         test_must_fail git commit-graph verify 2>test_err &&
505         grep -v "^+" test_err >err &&
506         test_i18ngrep "$grepstr" err &&
507         if test "$2" != "no-copy"
508         then
509                 cp $objdir/info/commit-graph commit-graph-pre-write-test
510         fi &&
511         git status --short &&
512         GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
513         chmod u+w $objdir/info/commit-graph &&
514         git commit-graph verify
515 }
516
517 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
518 # Manipulates the commit-graph file at the position
519 # by inserting the data, optionally zeroing the file
520 # starting at <zero_pos>, then runs 'git commit-graph verify'
521 # and places the output in the file 'err'. Test 'err' for
522 # the given string.
523 corrupt_graph_and_verify() {
524         pos=$1
525         data="${2:-\0}"
526         grepstr=$3
527         corrupt_graph_setup &&
528         orig_size=$(wc -c < $objdir/info/commit-graph) &&
529         zero_pos=${4:-${orig_size}} &&
530         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
531         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
532         generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
533         corrupt_graph_verify "$grepstr"
534
535 }
536
537 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
538         corrupt_graph_setup &&
539         chmod 000 $objdir/info/commit-graph &&
540         corrupt_graph_verify "Could not open" "no-copy"
541 '
542
543 test_expect_success 'detect too small' '
544         corrupt_graph_setup &&
545         echo "a small graph" >$objdir/info/commit-graph &&
546         corrupt_graph_verify "too small"
547 '
548
549 test_expect_success 'detect bad signature' '
550         corrupt_graph_and_verify 0 "\0" \
551                 "graph signature"
552 '
553
554 test_expect_success 'detect bad version' '
555         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
556                 "graph version"
557 '
558
559 test_expect_success 'detect bad hash version' '
560         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
561                 "hash version"
562 '
563
564 test_expect_success 'detect low chunk count' '
565         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
566                 "missing the .* chunk"
567 '
568
569 test_expect_success 'detect missing OID fanout chunk' '
570         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
571                 "missing the OID Fanout chunk"
572 '
573
574 test_expect_success 'detect missing OID lookup chunk' '
575         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
576                 "missing the OID Lookup chunk"
577 '
578
579 test_expect_success 'detect missing commit data chunk' '
580         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
581                 "missing the Commit Data chunk"
582 '
583
584 test_expect_success 'detect incorrect fanout' '
585         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
586                 "fanout value"
587 '
588
589 test_expect_success 'detect incorrect fanout final value' '
590         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
591                 "fanout value"
592 '
593
594 test_expect_success 'detect incorrect OID order' '
595         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
596                 "incorrect OID order"
597 '
598
599 test_expect_success 'detect OID not in object database' '
600         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
601                 "from object database"
602 '
603
604 test_expect_success 'detect incorrect tree OID' '
605         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
606                 "root tree OID for commit"
607 '
608
609 test_expect_success 'detect incorrect parent int-id' '
610         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
611                 "invalid parent"
612 '
613
614 test_expect_success 'detect extra parent int-id' '
615         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
616                 "is too long"
617 '
618
619 test_expect_success 'detect wrong parent' '
620         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
621                 "commit-graph parent for"
622 '
623
624 test_expect_success 'detect incorrect generation number' '
625         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
626                 "generation for commit"
627 '
628
629 test_expect_success 'detect incorrect generation number' '
630         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
631                 "non-zero generation number"
632 '
633
634 test_expect_success 'detect incorrect commit date' '
635         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
636                 "commit date"
637 '
638
639 test_expect_success 'detect incorrect parent for octopus merge' '
640         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
641                 "invalid parent"
642 '
643
644 test_expect_success 'detect invalid checksum hash' '
645         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
646                 "incorrect checksum"
647 '
648
649 test_expect_success 'detect incorrect chunk count' '
650         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
651                 "commit-graph file is too small to hold [0-9]* chunks" \
652                 $GRAPH_CHUNK_LOOKUP_OFFSET
653 '
654
655 test_expect_success 'git fsck (checks commit-graph)' '
656         cd "$TRASH_DIRECTORY/full" &&
657         git fsck &&
658         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
659                 "incorrect checksum" &&
660         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
661         test_must_fail git fsck
662 '
663
664 test_expect_success 'setup non-the_repository tests' '
665         rm -rf repo &&
666         git init repo &&
667         test_commit -C repo one &&
668         test_commit -C repo two &&
669         git -C repo config core.commitGraph true &&
670         git -C repo rev-parse two | \
671                 git -C repo commit-graph write --stdin-commits
672 '
673
674 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
675         test-tool repository parse_commit_in_graph \
676                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
677         {
678                 git -C repo log --pretty=format:"%ct " -1 &&
679                 git -C repo rev-parse one
680         } >expect &&
681         test_cmp expect actual &&
682
683         test-tool repository parse_commit_in_graph \
684                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
685         git -C repo log --pretty="%ct" -1 one >expect &&
686         test_cmp expect actual
687 '
688
689 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
690         test-tool repository get_commit_tree_in_graph \
691                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
692         git -C repo rev-parse two^{tree} >expect &&
693         test_cmp expect actual &&
694
695         test-tool repository get_commit_tree_in_graph \
696                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
697         git -C repo rev-parse one^{tree} >expect &&
698         test_cmp expect actual
699 '
700
701 test_expect_success 'corrupt commit-graph write (broken parent)' '
702         rm -rf repo &&
703         git init repo &&
704         (
705                 cd repo &&
706                 empty="$(git mktree </dev/null)" &&
707                 cat >broken <<-EOF &&
708                 tree $empty
709                 parent $ZERO_OID
710                 author whatever <whatever@example.com> 1234 -0000
711                 committer whatever <whatever@example.com> 1234 -0000
712
713                 broken commit
714                 EOF
715                 broken="$(git hash-object -w -t commit --literally broken)" &&
716                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
717                 test_must_fail git commit-graph write --stdin-commits \
718                         <good 2>test_err &&
719                 test_i18ngrep "unable to parse commit" test_err
720         )
721 '
722
723 test_expect_success 'corrupt commit-graph write (missing tree)' '
724         rm -rf repo &&
725         git init repo &&
726         (
727                 cd repo &&
728                 tree="$(git mktree </dev/null)" &&
729                 cat >broken <<-EOF &&
730                 parent $ZERO_OID
731                 author whatever <whatever@example.com> 1234 -0000
732                 committer whatever <whatever@example.com> 1234 -0000
733
734                 broken commit
735                 EOF
736                 broken="$(git hash-object -w -t commit --literally broken)" &&
737                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
738                 test_must_fail git commit-graph write --stdin-commits \
739                         <good 2>test_err &&
740                 test_i18ngrep "unable to parse commit" test_err
741         )
742 '
743
744 test_done