commit-graph: verify root tree OIDs
[git/git.git] / t / t5318-commit-graph.sh
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1#!/bin/sh
2
3test_description='commit graph'
4. ./test-lib.sh
5
6test_expect_success 'setup full repo' '
7 mkdir full &&
8 cd "$TRASH_DIRECTORY/full" &&
9 git init &&
177722b3 10 git config core.commitGraph true &&
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11 objdir=".git/objects"
12'
13
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14test_expect_success 'verify graph with no graph file' '
15 cd "$TRASH_DIRECTORY/full" &&
16 git commit-graph verify
17'
18
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19test_expect_success 'write graph with no packs' '
20 cd "$TRASH_DIRECTORY/full" &&
21 git commit-graph write --object-dir . &&
22 test_path_is_file info/commit-graph
23'
24
25test_expect_success 'create commits and repack' '
26 cd "$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
177722b3 35graph_git_two_modes() {
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36 git -c core.commitGraph=true $1 >output
37 git -c core.commitGraph=false $1 >expect
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38 test_cmp output expect
39}
40
41graph_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
56graph_git_behavior 'no graph' full commits/3 commits/1
57
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58graph_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
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75test_expect_success 'write graph' '
76 cd "$TRASH_DIRECTORY/full" &&
77 graph1=$(git commit-graph write) &&
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78 test_path_is_file $objdir/info/commit-graph &&
79 graph_read_expect "3"
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80'
81
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82graph_git_behavior 'graph exists' full commits/3 commits/1
83
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84test_expect_success 'Add more commits' '
85 cd "$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
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120test_expect_success 'write graph with merges' '
121 cd "$TRASH_DIRECTORY/full" &&
122 git commit-graph write &&
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123 test_path_is_file $objdir/info/commit-graph &&
124 graph_read_expect "10" "large_edges"
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125'
126
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127graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
128graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
129graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
130
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131test_expect_success 'Add one more commit' '
132 cd "$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 $objdir/pack| grep idx | grep -v --file=existing-idx >new-idx
138'
139
140# Current graph structure:
141#
142# 8
143# |
144# __M3___
145# / | \
146# 3 M1 5 M2 7
147# |/ \|/ \|
148# 2 4 6
149# |___/____/
150# 1
151
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152graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
153graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
154
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155test_expect_success 'write graph with new commit' '
156 cd "$TRASH_DIRECTORY/full" &&
157 git commit-graph write &&
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158 test_path_is_file $objdir/info/commit-graph &&
159 graph_read_expect "11" "large_edges"
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160'
161
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162graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
163graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
164
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165test_expect_success 'write graph with nothing new' '
166 cd "$TRASH_DIRECTORY/full" &&
167 git commit-graph write &&
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168 test_path_is_file $objdir/info/commit-graph &&
169 graph_read_expect "11" "large_edges"
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170'
171
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172graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
173graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
174
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175test_expect_success 'build graph from latest pack with closure' '
176 cd "$TRASH_DIRECTORY/full" &&
177 cat new-idx | git commit-graph write --stdin-packs &&
178 test_path_is_file $objdir/info/commit-graph &&
179 graph_read_expect "9" "large_edges"
180'
181
182graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
183graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
184
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185test_expect_success 'build graph from commits with closure' '
186 cd "$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 $objdir/info/commit-graph &&
192 graph_read_expect "6"
193'
194
195graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
196graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
197
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198test_expect_success 'build graph from commits with append' '
199 cd "$TRASH_DIRECTORY/full" &&
200 git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
201 test_path_is_file $objdir/info/commit-graph &&
202 graph_read_expect "10" "large_edges"
203'
204
205graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
206graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
207
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208test_expect_success 'setup bare repo' '
209 cd "$TRASH_DIRECTORY" &&
210 git clone --bare --no-local full bare &&
211 cd bare &&
177722b3 212 git config core.commitGraph true &&
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213 baredir="./objects"
214'
215
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216graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
217graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
218
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219test_expect_success 'write graph in bare repo' '
220 cd "$TRASH_DIRECTORY/bare" &&
221 git commit-graph write &&
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222 test_path_is_file $baredir/info/commit-graph &&
223 graph_read_expect "11" "large_edges"
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224'
225
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226graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
227graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
228
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229test_expect_success 'perform fast-forward merge in full repo' '
230 cd "$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
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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
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244test_expect_success 'git commit-graph verify' '
245 cd "$TRASH_DIRECTORY/full" &&
d9b9f8a6 246 git rev-parse commits/8 | git commit-graph write --stdin-commits &&
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247 git commit-graph verify >output
248'
249
96af91d4 250NUM_COMMITS=9
9bda8467 251HASH_LEN=20
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252GRAPH_BYTE_VERSION=4
253GRAPH_BYTE_HASH=5
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254GRAPH_BYTE_CHUNK_COUNT=6
255GRAPH_CHUNK_LOOKUP_OFFSET=8
256GRAPH_CHUNK_LOOKUP_WIDTH=12
257GRAPH_CHUNK_LOOKUP_ROWS=5
258GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
259GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
260 1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
261GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
262 2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
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263GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
264 $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
265GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
266GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
267GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
268GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
96af91d4 269GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
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270GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
271GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
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272
273# usage: corrupt_graph_and_verify <position> <data> <string>
274# Manipulates the commit-graph file at the position
275# by inserting the data, then runs 'git commit-graph verify'
276# and places the output in the file 'err'. Test 'err' for
277# the given string.
278corrupt_graph_and_verify() {
279 pos=$1
280 data="${2:-\0}"
281 grepstr=$3
282 cd "$TRASH_DIRECTORY/full" &&
283 test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
284 cp $objdir/info/commit-graph commit-graph-backup &&
285 printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
286 test_must_fail git commit-graph verify 2>test_err &&
287 grep -v "^+" test_err >err
288 test_i18ngrep "$grepstr" err
289}
290
291test_expect_success 'detect bad signature' '
292 corrupt_graph_and_verify 0 "\0" \
293 "graph signature"
294'
295
296test_expect_success 'detect bad version' '
297 corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
298 "graph version"
299'
300
301test_expect_success 'detect bad hash version' '
302 corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
303 "hash version"
304'
305
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306test_expect_success 'detect low chunk count' '
307 corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
308 "missing the .* chunk"
309'
310
311test_expect_success 'detect missing OID fanout chunk' '
312 corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
313 "missing the OID Fanout chunk"
314'
315
316test_expect_success 'detect missing OID lookup chunk' '
317 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
318 "missing the OID Lookup chunk"
319'
320
321test_expect_success 'detect missing commit data chunk' '
322 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
323 "missing the Commit Data chunk"
324'
325
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326test_expect_success 'detect incorrect fanout' '
327 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
328 "fanout value"
329'
330
331test_expect_success 'detect incorrect fanout final value' '
332 corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
333 "fanout value"
334'
335
336test_expect_success 'detect incorrect OID order' '
337 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
338 "incorrect OID order"
339'
340
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341test_expect_success 'detect OID not in object database' '
342 corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
343 "from object database"
344'
345
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346test_expect_success 'detect incorrect tree OID' '
347 corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
348 "root tree OID for commit"
349'
350
f237c8b6 351test_done