e2c39533d3f8ce292f151d82f19dd753b564b882
[git/git.git] / t / t5324-split-commit-graph.sh
1 #!/bin/sh
2
3 test_description='split commit graph'
4 . ./test-lib.sh
5
6 GIT_TEST_COMMIT_GRAPH=0
7
8 test_expect_success 'setup repo' '
9 git init &&
10 git config core.commitGraph true &&
11 git config gc.writeCommitGraph false &&
12 infodir=".git/objects/info" &&
13 graphdir="$infodir/commit-graphs" &&
14 test_oid_init
15 '
16
17 graph_read_expect() {
18 NUM_BASE=0
19 if test ! -z $2
20 then
21 NUM_BASE=$2
22 fi
23 cat >expect <<- EOF
24 header: 43475048 1 1 3 $NUM_BASE
25 num_commits: $1
26 chunks: oid_fanout oid_lookup commit_metadata
27 EOF
28 git commit-graph read >output &&
29 test_cmp expect output
30 }
31
32 test_expect_success 'create commits and write commit-graph' '
33 for i in $(test_seq 3)
34 do
35 test_commit $i &&
36 git branch commits/$i || return 1
37 done &&
38 git commit-graph write --reachable &&
39 test_path_is_file $infodir/commit-graph &&
40 graph_read_expect 3
41 '
42
43 graph_git_two_modes() {
44 git -c core.commitGraph=true $1 >output
45 git -c core.commitGraph=false $1 >expect
46 test_cmp expect output
47 }
48
49 graph_git_behavior() {
50 MSG=$1
51 BRANCH=$2
52 COMPARE=$3
53 test_expect_success "check normal git operations: $MSG" '
54 graph_git_two_modes "log --oneline $BRANCH" &&
55 graph_git_two_modes "log --topo-order $BRANCH" &&
56 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
57 graph_git_two_modes "branch -vv" &&
58 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
59 '
60 }
61
62 graph_git_behavior 'graph exists' commits/3 commits/1
63
64 verify_chain_files_exist() {
65 for hash in $(cat $1/commit-graph-chain)
66 do
67 test_path_is_file $1/graph-$hash.graph || return 1
68 done
69 }
70
71 test_expect_success 'add more commits, and write a new base graph' '
72 git reset --hard commits/1 &&
73 for i in $(test_seq 4 5)
74 do
75 test_commit $i &&
76 git branch commits/$i || return 1
77 done &&
78 git reset --hard commits/2 &&
79 for i in $(test_seq 6 10)
80 do
81 test_commit $i &&
82 git branch commits/$i || return 1
83 done &&
84 git reset --hard commits/2 &&
85 git merge commits/4 &&
86 git branch merge/1 &&
87 git reset --hard commits/4 &&
88 git merge commits/6 &&
89 git branch merge/2 &&
90 git commit-graph write --reachable &&
91 graph_read_expect 12
92 '
93
94 test_expect_success 'fork and fail to base a chain on a commit-graph file' '
95 test_when_finished rm -rf fork &&
96 git clone . fork &&
97 (
98 cd fork &&
99 rm .git/objects/info/commit-graph &&
100 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
101 test_commit new-commit &&
102 git commit-graph write --reachable --split &&
103 test_path_is_file $graphdir/commit-graph-chain &&
104 test_line_count = 1 $graphdir/commit-graph-chain &&
105 verify_chain_files_exist $graphdir
106 )
107 '
108
109 test_expect_success 'add three more commits, write a tip graph' '
110 git reset --hard commits/3 &&
111 git merge merge/1 &&
112 git merge commits/5 &&
113 git merge merge/2 &&
114 git branch merge/3 &&
115 git commit-graph write --reachable --split &&
116 test_path_is_missing $infodir/commit-graph &&
117 test_path_is_file $graphdir/commit-graph-chain &&
118 ls $graphdir/graph-*.graph >graph-files &&
119 test_line_count = 2 graph-files &&
120 verify_chain_files_exist $graphdir
121 '
122
123 graph_git_behavior 'split commit-graph: merge 3 vs 2' merge/3 merge/2
124
125 test_expect_success 'add one commit, write a tip graph' '
126 test_commit 11 &&
127 git branch commits/11 &&
128 git commit-graph write --reachable --split &&
129 test_path_is_missing $infodir/commit-graph &&
130 test_path_is_file $graphdir/commit-graph-chain &&
131 ls $graphdir/graph-*.graph >graph-files &&
132 test_line_count = 3 graph-files &&
133 verify_chain_files_exist $graphdir
134 '
135
136 graph_git_behavior 'three-layer commit-graph: commit 11 vs 6' commits/11 commits/6
137
138 test_expect_success 'add one commit, write a merged graph' '
139 test_commit 12 &&
140 git branch commits/12 &&
141 git commit-graph write --reachable --split &&
142 test_path_is_file $graphdir/commit-graph-chain &&
143 test_line_count = 2 $graphdir/commit-graph-chain &&
144 ls $graphdir/graph-*.graph >graph-files &&
145 test_line_count = 2 graph-files &&
146 verify_chain_files_exist $graphdir
147 '
148
149 graph_git_behavior 'merged commit-graph: commit 12 vs 6' commits/12 commits/6
150
151 test_expect_success 'create fork and chain across alternate' '
152 git clone . fork &&
153 (
154 cd fork &&
155 git config core.commitGraph true &&
156 rm -rf $graphdir &&
157 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
158 test_commit 13 &&
159 git branch commits/13 &&
160 git commit-graph write --reachable --split &&
161 test_path_is_file $graphdir/commit-graph-chain &&
162 test_line_count = 3 $graphdir/commit-graph-chain &&
163 ls $graphdir/graph-*.graph >graph-files &&
164 test_line_count = 1 graph-files &&
165 git -c core.commitGraph=true rev-list HEAD >expect &&
166 git -c core.commitGraph=false rev-list HEAD >actual &&
167 test_cmp expect actual &&
168 test_commit 14 &&
169 git commit-graph write --reachable --split --object-dir=.git/objects/ &&
170 test_line_count = 3 $graphdir/commit-graph-chain &&
171 ls $graphdir/graph-*.graph >graph-files &&
172 test_line_count = 1 graph-files
173 )
174 '
175
176 graph_git_behavior 'alternate: commit 13 vs 6' commits/13 commits/6
177
178 test_expect_success 'test merge stragety constants' '
179 git clone . merge-2 &&
180 (
181 cd merge-2 &&
182 git config core.commitGraph true &&
183 test_line_count = 2 $graphdir/commit-graph-chain &&
184 test_commit 14 &&
185 git commit-graph write --reachable --split --size-multiple=2 &&
186 test_line_count = 3 $graphdir/commit-graph-chain
187
188 ) &&
189 git clone . merge-10 &&
190 (
191 cd merge-10 &&
192 git config core.commitGraph true &&
193 test_line_count = 2 $graphdir/commit-graph-chain &&
194 test_commit 14 &&
195 git commit-graph write --reachable --split --size-multiple=10 &&
196 test_line_count = 1 $graphdir/commit-graph-chain &&
197 ls $graphdir/graph-*.graph >graph-files &&
198 test_line_count = 1 graph-files
199 ) &&
200 git clone . merge-10-expire &&
201 (
202 cd merge-10-expire &&
203 git config core.commitGraph true &&
204 test_line_count = 2 $graphdir/commit-graph-chain &&
205 test_commit 15 &&
206 git commit-graph write --reachable --split --size-multiple=10 --expire-time=1980-01-01 &&
207 test_line_count = 1 $graphdir/commit-graph-chain &&
208 ls $graphdir/graph-*.graph >graph-files &&
209 test_line_count = 3 graph-files
210 ) &&
211 git clone --no-hardlinks . max-commits &&
212 (
213 cd max-commits &&
214 git config core.commitGraph true &&
215 test_line_count = 2 $graphdir/commit-graph-chain &&
216 test_commit 16 &&
217 test_commit 17 &&
218 git commit-graph write --reachable --split --max-commits=1 &&
219 test_line_count = 1 $graphdir/commit-graph-chain &&
220 ls $graphdir/graph-*.graph >graph-files &&
221 test_line_count = 1 graph-files
222 )
223 '
224
225 test_expect_success 'remove commit-graph-chain file after flattening' '
226 git clone . flatten &&
227 (
228 cd flatten &&
229 test_line_count = 2 $graphdir/commit-graph-chain &&
230 git commit-graph write --reachable &&
231 test_path_is_missing $graphdir/commit-graph-chain &&
232 ls $graphdir >graph-files &&
233 test_line_count = 0 graph-files
234 )
235 '
236
237 corrupt_file() {
238 file=$1
239 pos=$2
240 data="${3:-\0}"
241 chmod a+w "$file" &&
242 printf "$data" | dd of="$file" bs=1 seek="$pos" conv=notrunc
243 }
244
245 test_expect_success 'verify hashes along chain, even in shallow' '
246 git clone --no-hardlinks . verify &&
247 (
248 cd verify &&
249 git commit-graph verify &&
250 base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
251 corrupt_file "$base_file" 1760 "\01" &&
252 test_must_fail git commit-graph verify --shallow 2>test_err &&
253 grep -v "^+" test_err >err &&
254 test_i18ngrep "incorrect checksum" err
255 )
256 '
257
258 test_expect_success 'verify --shallow does not check base contents' '
259 git clone --no-hardlinks . verify-shallow &&
260 (
261 cd verify-shallow &&
262 git commit-graph verify &&
263 base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
264 corrupt_file "$base_file" 1000 "\01" &&
265 git commit-graph verify --shallow &&
266 test_must_fail git commit-graph verify 2>test_err &&
267 grep -v "^+" test_err >err &&
268 test_i18ngrep "incorrect checksum" err
269 )
270 '
271
272 test_expect_success 'warn on base graph chunk incorrect' '
273 git clone --no-hardlinks . base-chunk &&
274 (
275 cd base-chunk &&
276 git commit-graph verify &&
277 base_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
278 corrupt_file "$base_file" 1376 "\01" &&
279 git commit-graph verify --shallow 2>test_err &&
280 grep -v "^+" test_err >err &&
281 test_i18ngrep "commit-graph chain does not match" err
282 )
283 '
284
285 test_expect_success 'verify after commit-graph-chain corruption' '
286 git clone --no-hardlinks . verify-chain &&
287 (
288 cd verify-chain &&
289 corrupt_file "$graphdir/commit-graph-chain" 60 "G" &&
290 git commit-graph verify 2>test_err &&
291 grep -v "^+" test_err >err &&
292 test_i18ngrep "invalid commit-graph chain" err &&
293 corrupt_file "$graphdir/commit-graph-chain" 60 "A" &&
294 git commit-graph verify 2>test_err &&
295 grep -v "^+" test_err >err &&
296 test_i18ngrep "unable to find all commit-graph files" err
297 )
298 '
299
300 test_expect_success 'verify across alternates' '
301 git clone --no-hardlinks . verify-alt &&
302 (
303 cd verify-alt &&
304 rm -rf $graphdir &&
305 altdir="$(pwd)/../.git/objects" &&
306 echo "$altdir" >.git/objects/info/alternates &&
307 git commit-graph verify --object-dir="$altdir/" &&
308 test_commit extra &&
309 git commit-graph write --reachable --split &&
310 tip_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
311 corrupt_file "$tip_file" 100 "\01" &&
312 test_must_fail git commit-graph verify --shallow 2>test_err &&
313 grep -v "^+" test_err >err &&
314 test_i18ngrep "commit-graph has incorrect fanout value" err
315 )
316 '
317
318 test_expect_success 'add octopus merge' '
319 git reset --hard commits/10 &&
320 git merge commits/3 commits/4 &&
321 git branch merge/octopus &&
322 git commit-graph write --reachable --split &&
323 git commit-graph verify 2>err &&
324 test_line_count = 3 err &&
325 test_i18ngrep ! warning err &&
326 test_line_count = 3 $graphdir/commit-graph-chain
327 '
328
329 graph_git_behavior 'graph exists' merge/octopus commits/12
330
331 test_expect_success 'split across alternate where alternate is not split' '
332 git commit-graph write --reachable &&
333 test_path_is_file .git/objects/info/commit-graph &&
334 cp .git/objects/info/commit-graph . &&
335 git clone --no-hardlinks . alt-split &&
336 (
337 cd alt-split &&
338 rm -f .git/objects/info/commit-graph &&
339 echo "$(pwd)"/../.git/objects >.git/objects/info/alternates &&
340 test_commit 18 &&
341 git commit-graph write --reachable --split &&
342 test_line_count = 1 $graphdir/commit-graph-chain
343 ) &&
344 test_cmp commit-graph .git/objects/info/commit-graph
345 '
346
347 test_done