t5318: use test_oid for HASH_LEN
[git/git.git] / t / t5318-commit-graph.sh
1 #!/bin/sh
2
3 test_description='commit graph'
4 . ./test-lib.sh
5
6 test_expect_success 'setup full repo' '
7 mkdir full &&
8 cd "$TRASH_DIRECTORY/full" &&
9 git init &&
10 git config core.commitGraph true &&
11 objdir=".git/objects" &&
12 test_oid_init
13 '
14
15 test_expect_success 'verify graph with no graph file' '
16 cd "$TRASH_DIRECTORY/full" &&
17 git commit-graph verify
18 '
19
20 test_expect_success 'write graph with no packs' '
21 cd "$TRASH_DIRECTORY/full" &&
22 git commit-graph write --object-dir . &&
23 test_path_is_file info/commit-graph
24 '
25
26 test_expect_success 'create commits and repack' '
27 cd "$TRASH_DIRECTORY/full" &&
28 for i in $(test_seq 3)
29 do
30 test_commit $i &&
31 git branch commits/$i
32 done &&
33 git repack
34 '
35
36 graph_git_two_modes() {
37 git -c core.commitGraph=true $1 >output
38 git -c core.commitGraph=false $1 >expect
39 test_cmp output expect
40 }
41
42 graph_git_behavior() {
43 MSG=$1
44 DIR=$2
45 BRANCH=$3
46 COMPARE=$4
47 test_expect_success "check normal git operations: $MSG" '
48 cd "$TRASH_DIRECTORY/$DIR" &&
49 graph_git_two_modes "log --oneline $BRANCH" &&
50 graph_git_two_modes "log --topo-order $BRANCH" &&
51 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
52 graph_git_two_modes "branch -vv" &&
53 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
54 '
55 }
56
57 graph_git_behavior 'no graph' full commits/3 commits/1
58
59 graph_read_expect() {
60 OPTIONAL=""
61 NUM_CHUNKS=3
62 if test ! -z $2
63 then
64 OPTIONAL=" $2"
65 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
66 fi
67 cat >expect <<- EOF
68 header: 43475048 1 1 $NUM_CHUNKS 0
69 num_commits: $1
70 chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
71 EOF
72 git commit-graph read >output &&
73 test_cmp expect output
74 }
75
76 test_expect_success 'write graph' '
77 cd "$TRASH_DIRECTORY/full" &&
78 graph1=$(git commit-graph write) &&
79 test_path_is_file $objdir/info/commit-graph &&
80 graph_read_expect "3"
81 '
82
83 graph_git_behavior 'graph exists' full commits/3 commits/1
84
85 test_expect_success 'Add more commits' '
86 cd "$TRASH_DIRECTORY/full" &&
87 git reset --hard commits/1 &&
88 for i in $(test_seq 4 5)
89 do
90 test_commit $i &&
91 git branch commits/$i
92 done &&
93 git reset --hard commits/2 &&
94 for i in $(test_seq 6 7)
95 do
96 test_commit $i &&
97 git branch commits/$i
98 done &&
99 git reset --hard commits/2 &&
100 git merge commits/4 &&
101 git branch merge/1 &&
102 git reset --hard commits/4 &&
103 git merge commits/6 &&
104 git branch merge/2 &&
105 git reset --hard commits/3 &&
106 git merge commits/5 commits/7 &&
107 git branch merge/3 &&
108 git repack
109 '
110
111 # Current graph structure:
112 #
113 # __M3___
114 # / | \
115 # 3 M1 5 M2 7
116 # |/ \|/ \|
117 # 2 4 6
118 # |___/____/
119 # 1
120
121 test_expect_success 'write graph with merges' '
122 cd "$TRASH_DIRECTORY/full" &&
123 git commit-graph write &&
124 test_path_is_file $objdir/info/commit-graph &&
125 graph_read_expect "10" "large_edges"
126 '
127
128 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
129 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
130 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
131
132 test_expect_success 'Add one more commit' '
133 cd "$TRASH_DIRECTORY/full" &&
134 test_commit 8 &&
135 git branch commits/8 &&
136 ls $objdir/pack | grep idx >existing-idx &&
137 git repack &&
138 ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
139 '
140
141 # Current graph structure:
142 #
143 # 8
144 # |
145 # __M3___
146 # / | \
147 # 3 M1 5 M2 7
148 # |/ \|/ \|
149 # 2 4 6
150 # |___/____/
151 # 1
152
153 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
154 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
155
156 test_expect_success 'write graph with new commit' '
157 cd "$TRASH_DIRECTORY/full" &&
158 git commit-graph write &&
159 test_path_is_file $objdir/info/commit-graph &&
160 graph_read_expect "11" "large_edges"
161 '
162
163 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
164 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
165
166 test_expect_success 'write graph with nothing new' '
167 cd "$TRASH_DIRECTORY/full" &&
168 git commit-graph write &&
169 test_path_is_file $objdir/info/commit-graph &&
170 graph_read_expect "11" "large_edges"
171 '
172
173 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
174 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
175
176 test_expect_success 'build graph from latest pack with closure' '
177 cd "$TRASH_DIRECTORY/full" &&
178 cat new-idx | git commit-graph write --stdin-packs &&
179 test_path_is_file $objdir/info/commit-graph &&
180 graph_read_expect "9" "large_edges"
181 '
182
183 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
184 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
185
186 test_expect_success 'build graph from commits with closure' '
187 cd "$TRASH_DIRECTORY/full" &&
188 git tag -a -m "merge" tag/merge merge/2 &&
189 git rev-parse tag/merge >commits-in &&
190 git rev-parse merge/1 >>commits-in &&
191 cat commits-in | git commit-graph write --stdin-commits &&
192 test_path_is_file $objdir/info/commit-graph &&
193 graph_read_expect "6"
194 '
195
196 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
197 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
198
199 test_expect_success 'build graph from commits with append' '
200 cd "$TRASH_DIRECTORY/full" &&
201 git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
202 test_path_is_file $objdir/info/commit-graph &&
203 graph_read_expect "10" "large_edges"
204 '
205
206 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
207 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
208
209 test_expect_success 'build graph using --reachable' '
210 cd "$TRASH_DIRECTORY/full" &&
211 git commit-graph write --reachable &&
212 test_path_is_file $objdir/info/commit-graph &&
213 graph_read_expect "11" "large_edges"
214 '
215
216 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
217 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
218
219 test_expect_success 'setup bare repo' '
220 cd "$TRASH_DIRECTORY" &&
221 git clone --bare --no-local full bare &&
222 cd bare &&
223 git config core.commitGraph true &&
224 baredir="./objects"
225 '
226
227 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
228 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
229
230 test_expect_success 'write graph in bare repo' '
231 cd "$TRASH_DIRECTORY/bare" &&
232 git commit-graph write &&
233 test_path_is_file $baredir/info/commit-graph &&
234 graph_read_expect "11" "large_edges"
235 '
236
237 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
238 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
239
240 test_expect_success 'perform fast-forward merge in full repo' '
241 cd "$TRASH_DIRECTORY/full" &&
242 git checkout -b merge-5-to-8 commits/5 &&
243 git merge commits/8 &&
244 git show-ref -s merge-5-to-8 >output &&
245 git show-ref -s commits/8 >expect &&
246 test_cmp expect output
247 '
248
249 test_expect_success 'check that gc computes commit-graph' '
250 cd "$TRASH_DIRECTORY/full" &&
251 git commit --allow-empty -m "blank" &&
252 git commit-graph write --reachable &&
253 cp $objdir/info/commit-graph commit-graph-before-gc &&
254 git reset --hard HEAD~1 &&
255 git config gc.writeCommitGraph true &&
256 git gc &&
257 cp $objdir/info/commit-graph commit-graph-after-gc &&
258 ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
259 git commit-graph write --reachable &&
260 test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
261 '
262
263 # the verify tests below expect the commit-graph to contain
264 # exactly the commits reachable from the commits/8 branch.
265 # If the file changes the set of commits in the list, then the
266 # offsets into the binary file will result in different edits
267 # and the tests will likely break.
268
269 test_expect_success 'git commit-graph verify' '
270 cd "$TRASH_DIRECTORY/full" &&
271 git rev-parse commits/8 | git commit-graph write --stdin-commits &&
272 git commit-graph verify >output
273 '
274
275 NUM_COMMITS=9
276 NUM_OCTOPUS_EDGES=2
277 HASH_LEN="$(test_oid rawsz)"
278 GRAPH_BYTE_VERSION=4
279 GRAPH_BYTE_HASH=5
280 GRAPH_BYTE_CHUNK_COUNT=6
281 GRAPH_CHUNK_LOOKUP_OFFSET=8
282 GRAPH_CHUNK_LOOKUP_WIDTH=12
283 GRAPH_CHUNK_LOOKUP_ROWS=5
284 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
285 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
286 1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
287 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
288 2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
289 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
290 $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
291 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
292 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
293 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
294 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
295 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
296 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
297 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
298 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
299 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
300 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
301 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
302 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
303 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
304 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
305 $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
306 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
307 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
308
309 # usage: corrupt_graph_and_verify <position> <data> <string>
310 # Manipulates the commit-graph file at the position
311 # by inserting the data, then runs 'git commit-graph verify'
312 # and places the output in the file 'err'. Test 'err' for
313 # the given string.
314 corrupt_graph_and_verify() {
315 pos=$1
316 data="${2:-\0}"
317 grepstr=$3
318 cd "$TRASH_DIRECTORY/full" &&
319 test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
320 cp $objdir/info/commit-graph commit-graph-backup &&
321 printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
322 test_must_fail git commit-graph verify 2>test_err &&
323 grep -v "^+" test_err >err
324 test_i18ngrep "$grepstr" err
325 }
326
327 test_expect_success 'detect bad signature' '
328 corrupt_graph_and_verify 0 "\0" \
329 "graph signature"
330 '
331
332 test_expect_success 'detect bad version' '
333 corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
334 "graph version"
335 '
336
337 test_expect_success 'detect bad hash version' '
338 corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
339 "hash version"
340 '
341
342 test_expect_success 'detect low chunk count' '
343 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
344 "missing the .* chunk"
345 '
346
347 test_expect_success 'detect missing OID fanout chunk' '
348 corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
349 "missing the OID Fanout chunk"
350 '
351
352 test_expect_success 'detect missing OID lookup chunk' '
353 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
354 "missing the OID Lookup chunk"
355 '
356
357 test_expect_success 'detect missing commit data chunk' '
358 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
359 "missing the Commit Data chunk"
360 '
361
362 test_expect_success 'detect incorrect fanout' '
363 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
364 "fanout value"
365 '
366
367 test_expect_success 'detect incorrect fanout final value' '
368 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
369 "fanout value"
370 '
371
372 test_expect_success 'detect incorrect OID order' '
373 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
374 "incorrect OID order"
375 '
376
377 test_expect_success 'detect OID not in object database' '
378 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
379 "from object database"
380 '
381
382 test_expect_success 'detect incorrect tree OID' '
383 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
384 "root tree OID for commit"
385 '
386
387 test_expect_success 'detect incorrect parent int-id' '
388 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
389 "invalid parent"
390 '
391
392 test_expect_success 'detect extra parent int-id' '
393 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
394 "is too long"
395 '
396
397 test_expect_success 'detect wrong parent' '
398 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
399 "commit-graph parent for"
400 '
401
402 test_expect_success 'detect incorrect generation number' '
403 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
404 "generation for commit"
405 '
406
407 test_expect_success 'detect incorrect generation number' '
408 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
409 "non-zero generation number"
410 '
411
412 test_expect_success 'detect incorrect commit date' '
413 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
414 "commit date"
415 '
416
417 test_expect_success 'detect incorrect parent for octopus merge' '
418 corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
419 "invalid parent"
420 '
421
422 test_expect_success 'detect invalid checksum hash' '
423 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
424 "incorrect checksum"
425 '
426
427 test_expect_success 'git fsck (checks commit-graph)' '
428 cd "$TRASH_DIRECTORY/full" &&
429 git fsck &&
430 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
431 "incorrect checksum" &&
432 test_must_fail git fsck
433 '
434
435 test_expect_success 'setup non-the_repository tests' '
436 rm -rf repo &&
437 git init repo &&
438 test_commit -C repo one &&
439 test_commit -C repo two &&
440 git -C repo config core.commitGraph true &&
441 git -C repo rev-parse two | \
442 git -C repo commit-graph write --stdin-commits
443 '
444
445 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
446 test-tool repository parse_commit_in_graph \
447 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
448 {
449 git -C repo log --pretty=format:"%ct " -1 &&
450 git -C repo rev-parse one
451 } >expect &&
452 test_cmp expect actual &&
453
454 test-tool repository parse_commit_in_graph \
455 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
456 git -C repo log --pretty="%ct" -1 one >expect &&
457 test_cmp expect actual
458 '
459
460 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
461 test-tool repository get_commit_tree_in_graph \
462 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
463 git -C repo rev-parse two^{tree} >expect &&
464 test_cmp expect actual &&
465
466 test-tool repository get_commit_tree_in_graph \
467 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
468 git -C repo rev-parse one^{tree} >expect &&
469 test_cmp expect actual
470 '
471
472 test_done