commit-graph: verify parent list
[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 "$TRASH_DIRECTORY/full" &&
9 git init &&
10 git config core.commitGraph true &&
11 objdir=".git/objects"
12 '
13
14 test_expect_success 'verify graph with no graph file' '
15 cd "$TRASH_DIRECTORY/full" &&
16 git commit-graph verify
17 '
18
19 test_expect_success 'write graph with no packs' '
20 cd "$TRASH_DIRECTORY/full" &&
21 git commit-graph write --object-dir . &&
22 test_path_is_file info/commit-graph
23 '
24
25 test_expect_success 'create commits and repack' '
26 cd "$TRASH_DIRECTORY/full" &&
27 for i in $(test_seq 3)
28 do
29 test_commit $i &&
30 git branch commits/$i
31 done &&
32 git repack
33 '
34
35 graph_git_two_modes() {
36 git -c core.commitGraph=true $1 >output
37 git -c core.commitGraph=false $1 >expect
38 test_cmp output expect
39 }
40
41 graph_git_behavior() {
42 MSG=$1
43 DIR=$2
44 BRANCH=$3
45 COMPARE=$4
46 test_expect_success "check normal git operations: $MSG" '
47 cd "$TRASH_DIRECTORY/$DIR" &&
48 graph_git_two_modes "log --oneline $BRANCH" &&
49 graph_git_two_modes "log --topo-order $BRANCH" &&
50 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
51 graph_git_two_modes "branch -vv" &&
52 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
53 '
54 }
55
56 graph_git_behavior 'no graph' full commits/3 commits/1
57
58 graph_read_expect() {
59 OPTIONAL=""
60 NUM_CHUNKS=3
61 if test ! -z $2
62 then
63 OPTIONAL=" $2"
64 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
65 fi
66 cat >expect <<- EOF
67 header: 43475048 1 1 $NUM_CHUNKS 0
68 num_commits: $1
69 chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
70 EOF
71 git commit-graph read >output &&
72 test_cmp expect output
73 }
74
75 test_expect_success 'write graph' '
76 cd "$TRASH_DIRECTORY/full" &&
77 graph1=$(git commit-graph write) &&
78 test_path_is_file $objdir/info/commit-graph &&
79 graph_read_expect "3"
80 '
81
82 graph_git_behavior 'graph exists' full commits/3 commits/1
83
84 test_expect_success 'Add more commits' '
85 cd "$TRASH_DIRECTORY/full" &&
86 git reset --hard commits/1 &&
87 for i in $(test_seq 4 5)
88 do
89 test_commit $i &&
90 git branch commits/$i
91 done &&
92 git reset --hard commits/2 &&
93 for i in $(test_seq 6 7)
94 do
95 test_commit $i &&
96 git branch commits/$i
97 done &&
98 git reset --hard commits/2 &&
99 git merge commits/4 &&
100 git branch merge/1 &&
101 git reset --hard commits/4 &&
102 git merge commits/6 &&
103 git branch merge/2 &&
104 git reset --hard commits/3 &&
105 git merge commits/5 commits/7 &&
106 git branch merge/3 &&
107 git repack
108 '
109
110 # Current graph structure:
111 #
112 # __M3___
113 # / | \
114 # 3 M1 5 M2 7
115 # |/ \|/ \|
116 # 2 4 6
117 # |___/____/
118 # 1
119
120 test_expect_success 'write graph with merges' '
121 cd "$TRASH_DIRECTORY/full" &&
122 git commit-graph write &&
123 test_path_is_file $objdir/info/commit-graph &&
124 graph_read_expect "10" "large_edges"
125 '
126
127 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
128 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
129 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
130
131 test_expect_success 'Add one more commit' '
132 cd "$TRASH_DIRECTORY/full" &&
133 test_commit 8 &&
134 git branch commits/8 &&
135 ls $objdir/pack | grep idx >existing-idx &&
136 git repack &&
137 ls $objdir/pack| grep idx | grep -v --file=existing-idx >new-idx
138 '
139
140 # Current graph structure:
141 #
142 # 8
143 # |
144 # __M3___
145 # / | \
146 # 3 M1 5 M2 7
147 # |/ \|/ \|
148 # 2 4 6
149 # |___/____/
150 # 1
151
152 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
153 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
154
155 test_expect_success 'write graph with new commit' '
156 cd "$TRASH_DIRECTORY/full" &&
157 git commit-graph write &&
158 test_path_is_file $objdir/info/commit-graph &&
159 graph_read_expect "11" "large_edges"
160 '
161
162 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
163 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
164
165 test_expect_success 'write graph with nothing new' '
166 cd "$TRASH_DIRECTORY/full" &&
167 git commit-graph write &&
168 test_path_is_file $objdir/info/commit-graph &&
169 graph_read_expect "11" "large_edges"
170 '
171
172 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
173 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
174
175 test_expect_success 'build graph from latest pack with closure' '
176 cd "$TRASH_DIRECTORY/full" &&
177 cat new-idx | git commit-graph write --stdin-packs &&
178 test_path_is_file $objdir/info/commit-graph &&
179 graph_read_expect "9" "large_edges"
180 '
181
182 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
183 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
184
185 test_expect_success 'build graph from commits with closure' '
186 cd "$TRASH_DIRECTORY/full" &&
187 git tag -a -m "merge" tag/merge merge/2 &&
188 git rev-parse tag/merge >commits-in &&
189 git rev-parse merge/1 >>commits-in &&
190 cat commits-in | git commit-graph write --stdin-commits &&
191 test_path_is_file $objdir/info/commit-graph &&
192 graph_read_expect "6"
193 '
194
195 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
196 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
197
198 test_expect_success 'build graph from commits with append' '
199 cd "$TRASH_DIRECTORY/full" &&
200 git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
201 test_path_is_file $objdir/info/commit-graph &&
202 graph_read_expect "10" "large_edges"
203 '
204
205 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
206 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
207
208 test_expect_success 'setup bare repo' '
209 cd "$TRASH_DIRECTORY" &&
210 git clone --bare --no-local full bare &&
211 cd bare &&
212 git config core.commitGraph true &&
213 baredir="./objects"
214 '
215
216 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
217 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
218
219 test_expect_success 'write graph in bare repo' '
220 cd "$TRASH_DIRECTORY/bare" &&
221 git commit-graph write &&
222 test_path_is_file $baredir/info/commit-graph &&
223 graph_read_expect "11" "large_edges"
224 '
225
226 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
227 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
228
229 test_expect_success 'perform fast-forward merge in full repo' '
230 cd "$TRASH_DIRECTORY/full" &&
231 git checkout -b merge-5-to-8 commits/5 &&
232 git merge commits/8 &&
233 git show-ref -s merge-5-to-8 >output &&
234 git show-ref -s commits/8 >expect &&
235 test_cmp expect output
236 '
237
238 # the verify tests below expect the commit-graph to contain
239 # exactly the commits reachable from the commits/8 branch.
240 # If the file changes the set of commits in the list, then the
241 # offsets into the binary file will result in different edits
242 # and the tests will likely break.
243
244 test_expect_success 'git commit-graph verify' '
245 cd "$TRASH_DIRECTORY/full" &&
246 git rev-parse commits/8 | git commit-graph write --stdin-commits &&
247 git commit-graph verify >output
248 '
249
250 NUM_COMMITS=9
251 HASH_LEN=20
252 GRAPH_BYTE_VERSION=4
253 GRAPH_BYTE_HASH=5
254 GRAPH_BYTE_CHUNK_COUNT=6
255 GRAPH_CHUNK_LOOKUP_OFFSET=8
256 GRAPH_CHUNK_LOOKUP_WIDTH=12
257 GRAPH_CHUNK_LOOKUP_ROWS=5
258 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
259 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
260 1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
261 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
262 2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
263 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
264 $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
265 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
266 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
267 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
268 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
269 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
270 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
271 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
272 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
273 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
274 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
275
276 # usage: corrupt_graph_and_verify <position> <data> <string>
277 # Manipulates the commit-graph file at the position
278 # by inserting the data, then runs 'git commit-graph verify'
279 # and places the output in the file 'err'. Test 'err' for
280 # the given string.
281 corrupt_graph_and_verify() {
282 pos=$1
283 data="${2:-\0}"
284 grepstr=$3
285 cd "$TRASH_DIRECTORY/full" &&
286 test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
287 cp $objdir/info/commit-graph commit-graph-backup &&
288 printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
289 test_must_fail git commit-graph verify 2>test_err &&
290 grep -v "^+" test_err >err
291 test_i18ngrep "$grepstr" err
292 }
293
294 test_expect_success 'detect bad signature' '
295 corrupt_graph_and_verify 0 "\0" \
296 "graph signature"
297 '
298
299 test_expect_success 'detect bad version' '
300 corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
301 "graph version"
302 '
303
304 test_expect_success 'detect bad hash version' '
305 corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
306 "hash version"
307 '
308
309 test_expect_success 'detect low chunk count' '
310 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
311 "missing the .* chunk"
312 '
313
314 test_expect_success 'detect missing OID fanout chunk' '
315 corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
316 "missing the OID Fanout chunk"
317 '
318
319 test_expect_success 'detect missing OID lookup chunk' '
320 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
321 "missing the OID Lookup chunk"
322 '
323
324 test_expect_success 'detect missing commit data chunk' '
325 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
326 "missing the Commit Data chunk"
327 '
328
329 test_expect_success 'detect incorrect fanout' '
330 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
331 "fanout value"
332 '
333
334 test_expect_success 'detect incorrect fanout final value' '
335 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
336 "fanout value"
337 '
338
339 test_expect_success 'detect incorrect OID order' '
340 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
341 "incorrect OID order"
342 '
343
344 test_expect_success 'detect OID not in object database' '
345 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
346 "from object database"
347 '
348
349 test_expect_success 'detect incorrect tree OID' '
350 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
351 "root tree OID for commit"
352 '
353
354 test_expect_success 'detect incorrect parent int-id' '
355 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
356 "invalid parent"
357 '
358
359 test_expect_success 'detect extra parent int-id' '
360 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
361 "is too long"
362 '
363
364 test_expect_success 'detect wrong parent' '
365 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
366 "commit-graph parent for"
367 '
368
369 test_done