3 test_description='commit graph'
6 test_expect_success 'setup full repo' '
8 cd "$TRASH_DIRECTORY/full" &&
10 git config core.commitGraph true &&
11 objdir=".git/objects" &&
15 test_expect_success 'verify graph with no graph file' '
16 cd "$TRASH_DIRECTORY/full" &&
17 git commit-graph verify
20 test_expect_success 'write graph with no packs' '
21 cd "$TRASH_DIRECTORY/full" &&
22 git commit-graph write --object-dir . &&
23 test_path_is_file info/commit-graph
26 test_expect_success 'create commits and repack' '
27 cd "$TRASH_DIRECTORY/full" &&
28 for i in $(test_seq 3)
36 graph_git_two_modes() {
37 git -c core.commitGraph=true $1 >output
38 git -c core.commitGraph=false $1 >expect
39 test_cmp expect output
42 graph_git_behavior() {
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 $COMPARE"
57 graph_git_behavior 'no graph' full commits/3 commits/1
65 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
68 header: 43475048 1 1 $NUM_CHUNKS 0
70 chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
72 git commit-graph read >output &&
73 test_cmp expect output
76 test_expect_success 'write graph' '
77 cd "$TRASH_DIRECTORY/full" &&
78 graph1=$(git commit-graph write) &&
79 test_path_is_file $objdir/info/commit-graph &&
83 graph_git_behavior 'graph exists' full commits/3 commits/1
85 test_expect_success 'Add more commits' '
86 cd "$TRASH_DIRECTORY/full" &&
87 git reset --hard commits/1 &&
88 for i in $(test_seq 4 5)
93 git reset --hard commits/2 &&
94 for i in $(test_seq 6 7)
99 git reset --hard commits/2 &&
100 git merge commits/4 &&
101 git branch merge/1 &&
102 git reset --hard commits/4 &&
103 git merge commits/6 &&
104 git branch merge/2 &&
105 git reset --hard commits/3 &&
106 git merge commits/5 commits/7 &&
107 git branch merge/3 &&
111 # Current graph structure:
121 test_expect_success 'write graph with merges' '
122 cd "$TRASH_DIRECTORY/full" &&
123 git commit-graph write &&
124 test_path_is_file $objdir/info/commit-graph &&
125 graph_read_expect "10" "extra_edges"
128 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
129 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
130 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
132 test_expect_success 'Add one more commit' '
133 cd "$TRASH_DIRECTORY/full" &&
135 git branch commits/8 &&
136 ls $objdir/pack | grep idx >existing-idx &&
138 ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
141 # Current graph structure:
153 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
154 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
156 test_expect_success 'write graph with new commit' '
157 cd "$TRASH_DIRECTORY/full" &&
158 git commit-graph write &&
159 test_path_is_file $objdir/info/commit-graph &&
160 graph_read_expect "11" "extra_edges"
163 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
164 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
166 test_expect_success 'write graph with nothing new' '
167 cd "$TRASH_DIRECTORY/full" &&
168 git commit-graph write &&
169 test_path_is_file $objdir/info/commit-graph &&
170 graph_read_expect "11" "extra_edges"
173 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
174 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
176 test_expect_success 'build graph from latest pack with closure' '
177 cd "$TRASH_DIRECTORY/full" &&
178 cat new-idx | git commit-graph write --stdin-packs &&
179 test_path_is_file $objdir/info/commit-graph &&
180 graph_read_expect "9" "extra_edges"
183 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
184 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
186 test_expect_success 'build graph from commits with closure' '
187 cd "$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 $objdir/info/commit-graph &&
193 graph_read_expect "6"
196 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
197 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
199 test_expect_success 'build graph from commits with append' '
200 cd "$TRASH_DIRECTORY/full" &&
201 git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
202 test_path_is_file $objdir/info/commit-graph &&
203 graph_read_expect "10" "extra_edges"
206 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
207 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
209 test_expect_success 'build graph using --reachable' '
210 cd "$TRASH_DIRECTORY/full" &&
211 git commit-graph write --reachable &&
212 test_path_is_file $objdir/info/commit-graph &&
213 graph_read_expect "11" "extra_edges"
216 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
217 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
219 test_expect_success 'setup bare repo' '
220 cd "$TRASH_DIRECTORY" &&
221 git clone --bare --no-local full bare &&
223 git config core.commitGraph true &&
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
230 test_expect_success 'write graph in bare repo' '
231 cd "$TRASH_DIRECTORY/bare" &&
232 git commit-graph write &&
233 test_path_is_file $baredir/info/commit-graph &&
234 graph_read_expect "11" "extra_edges"
237 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
238 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
240 test_expect_success 'perform fast-forward merge in full repo' '
241 cd "$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
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 &&
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 $objdir/info/commit-graph
263 test_expect_success 'replace-objects invalidates commit-graph' '
264 cd "$TRASH_DIRECTORY" &&
265 test_when_finished rm -rf replace &&
266 git clone full replace &&
269 git commit-graph write --reachable &&
270 test_path_is_file .git/objects/info/commit-graph &&
271 git replace HEAD~1 HEAD~2 &&
272 git -c core.commitGraph=false log >expect &&
273 git -c core.commitGraph=true log >actual &&
274 test_cmp expect actual &&
275 git commit-graph write --reachable &&
276 git -c core.commitGraph=false --no-replace-objects log >expect &&
277 git -c core.commitGraph=true --no-replace-objects log >actual &&
278 test_cmp expect actual &&
279 rm -rf .git/objects/info/commit-graph &&
280 git commit-graph write --reachable &&
281 test_path_is_file .git/objects/info/commit-graph
285 test_expect_success 'commit grafts invalidate commit-graph' '
286 cd "$TRASH_DIRECTORY" &&
287 test_when_finished rm -rf graft &&
288 git clone full graft &&
291 git commit-graph write --reachable &&
292 test_path_is_file .git/objects/info/commit-graph &&
293 H1=$(git rev-parse --verify HEAD~1) &&
294 H3=$(git rev-parse --verify HEAD~3) &&
295 echo "$H1 $H3" >.git/info/grafts &&
296 git -c core.commitGraph=false log >expect &&
297 git -c core.commitGraph=true log >actual &&
298 test_cmp expect actual &&
299 git commit-graph write --reachable &&
300 git -c core.commitGraph=false --no-replace-objects log >expect &&
301 git -c core.commitGraph=true --no-replace-objects log >actual &&
302 test_cmp expect actual &&
303 rm -rf .git/objects/info/commit-graph &&
304 git commit-graph write --reachable &&
305 test_path_is_missing .git/objects/info/commit-graph
309 test_expect_success 'replace-objects invalidates commit-graph' '
310 cd "$TRASH_DIRECTORY" &&
311 test_when_finished rm -rf shallow &&
312 git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
315 git commit-graph write --reachable &&
316 test_path_is_missing .git/objects/info/commit-graph &&
317 git fetch origin --unshallow &&
318 git commit-graph write --reachable &&
319 test_path_is_file .git/objects/info/commit-graph
323 # the verify tests below expect the commit-graph to contain
324 # exactly the commits reachable from the commits/8 branch.
325 # If the file changes the set of commits in the list, then the
326 # offsets into the binary file will result in different edits
327 # and the tests will likely break.
329 test_expect_success 'git commit-graph verify' '
330 cd "$TRASH_DIRECTORY/full" &&
331 git rev-parse commits/8 | git commit-graph write --stdin-commits &&
332 git commit-graph verify >output
337 HASH_LEN="$(test_oid rawsz)"
340 GRAPH_BYTE_CHUNK_COUNT=6
341 GRAPH_CHUNK_LOOKUP_OFFSET=8
342 GRAPH_CHUNK_LOOKUP_WIDTH=12
343 GRAPH_CHUNK_LOOKUP_ROWS=5
344 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
345 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
346 1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
347 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
348 2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
349 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
350 $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
351 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
352 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
353 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
354 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
355 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
356 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
357 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
358 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
359 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
360 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
361 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
362 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
363 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
364 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
365 $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
366 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
367 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
369 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
370 # Manipulates the commit-graph file at the position
371 # by inserting the data, optionally zeroing the file
372 # starting at <zero_pos>, then runs 'git commit-graph verify'
373 # and places the output in the file 'err'. Test 'err' for
375 corrupt_graph_and_verify() {
379 cd "$TRASH_DIRECTORY/full" &&
380 orig_size=$(wc -c < $objdir/info/commit-graph) &&
381 zero_pos=${4:-${orig_size}} &&
382 test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
383 cp $objdir/info/commit-graph commit-graph-backup &&
384 printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
385 dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" count=0 &&
386 dd if=/dev/zero of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" count=$(($orig_size - $zero_pos)) &&
387 test_must_fail git commit-graph verify 2>test_err &&
388 grep -v "^+" test_err >err &&
389 test_i18ngrep "$grepstr" err
392 test_expect_success 'detect bad signature' '
393 corrupt_graph_and_verify 0 "\0" \
397 test_expect_success 'detect bad version' '
398 corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
402 test_expect_success 'detect bad hash version' '
403 corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
407 test_expect_success 'detect low chunk count' '
408 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
409 "missing the .* chunk"
412 test_expect_success 'detect missing OID fanout chunk' '
413 corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
414 "missing the OID Fanout chunk"
417 test_expect_success 'detect missing OID lookup chunk' '
418 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
419 "missing the OID Lookup chunk"
422 test_expect_success 'detect missing commit data chunk' '
423 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
424 "missing the Commit Data chunk"
427 test_expect_success 'detect incorrect fanout' '
428 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
432 test_expect_success 'detect incorrect fanout final value' '
433 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
437 test_expect_success 'detect incorrect OID order' '
438 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
439 "incorrect OID order"
442 test_expect_success 'detect OID not in object database' '
443 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
444 "from object database"
447 test_expect_success 'detect incorrect tree OID' '
448 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
449 "root tree OID for commit"
452 test_expect_success 'detect incorrect parent int-id' '
453 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
457 test_expect_success 'detect extra parent int-id' '
458 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
462 test_expect_success 'detect wrong parent' '
463 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
464 "commit-graph parent for"
467 test_expect_success 'detect incorrect generation number' '
468 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
469 "generation for commit"
472 test_expect_success 'detect incorrect generation number' '
473 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
474 "non-zero generation number"
477 test_expect_success 'detect incorrect commit date' '
478 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
482 test_expect_success 'detect incorrect parent for octopus merge' '
483 corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
487 test_expect_success 'detect invalid checksum hash' '
488 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
492 test_expect_success 'detect incorrect chunk count' '
493 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
494 "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
497 test_expect_success 'git fsck (checks commit-graph)' '
498 cd "$TRASH_DIRECTORY/full" &&
500 corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
501 "incorrect checksum" &&
502 test_must_fail git fsck
505 test_expect_success 'setup non-the_repository tests' '
508 test_commit -C repo one &&
509 test_commit -C repo two &&
510 git -C repo config core.commitGraph true &&
511 git -C repo rev-parse two | \
512 git -C repo commit-graph write --stdin-commits
515 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
516 test-tool repository parse_commit_in_graph \
517 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
519 git -C repo log --pretty=format:"%ct " -1 &&
520 git -C repo rev-parse one
522 test_cmp expect actual &&
524 test-tool repository parse_commit_in_graph \
525 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
526 git -C repo log --pretty="%ct" -1 one >expect &&
527 test_cmp expect actual
530 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
531 test-tool repository get_commit_tree_in_graph \
532 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
533 git -C repo rev-parse two^{tree} >expect &&
534 test_cmp expect actual &&
536 test-tool repository get_commit_tree_in_graph \
537 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
538 git -C repo rev-parse one^{tree} >expect &&
539 test_cmp expect actual