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1 #!/bin/sh
2
3 test_description='exercise basic bitmap functionality'
4 . ./test-lib.sh
5
6 objpath () {
7 echo ".git/objects/$(echo "$1" | sed -e 's|\(..\)|\1/|')"
8 }
9
10 # show objects present in pack ($1 should be associated *.idx)
11 list_packed_objects () {
12 git show-index <"$1" >object-list &&
13 cut -d' ' -f2 object-list
14 }
15
16 # has_any pattern-file content-file
17 # tests whether content-file has any entry from pattern-file with entries being
18 # whole lines.
19 has_any () {
20 grep -Ff "$1" "$2"
21 }
22
23 test_expect_success 'setup repo with moderate-sized history' '
24 test_commit_bulk --id=file 100 &&
25 git checkout -b other HEAD~5 &&
26 test_commit_bulk --id=side 10 &&
27 git checkout master &&
28 bitmaptip=$(git rev-parse master) &&
29 blob=$(echo tagged-blob | git hash-object -w --stdin) &&
30 git tag tagged-blob $blob &&
31 git config repack.writebitmaps true
32 '
33
34 test_expect_success 'full repack creates bitmaps' '
35 git repack -ad &&
36 ls .git/objects/pack/ | grep bitmap >output &&
37 test_line_count = 1 output
38 '
39
40 test_expect_success 'rev-list --test-bitmap verifies bitmaps' '
41 git rev-list --test-bitmap HEAD
42 '
43
44 rev_list_tests() {
45 state=$1
46
47 test_expect_success "counting commits via bitmap ($state)" '
48 git rev-list --count HEAD >expect &&
49 git rev-list --use-bitmap-index --count HEAD >actual &&
50 test_cmp expect actual
51 '
52
53 test_expect_success "counting partial commits via bitmap ($state)" '
54 git rev-list --count HEAD~5..HEAD >expect &&
55 git rev-list --use-bitmap-index --count HEAD~5..HEAD >actual &&
56 test_cmp expect actual
57 '
58
59 test_expect_success "counting commits with limit ($state)" '
60 git rev-list --count -n 1 HEAD >expect &&
61 git rev-list --use-bitmap-index --count -n 1 HEAD >actual &&
62 test_cmp expect actual
63 '
64
65 test_expect_success "counting non-linear history ($state)" '
66 git rev-list --count other...master >expect &&
67 git rev-list --use-bitmap-index --count other...master >actual &&
68 test_cmp expect actual
69 '
70
71 test_expect_success "counting commits with limiting ($state)" '
72 git rev-list --count HEAD -- 1.t >expect &&
73 git rev-list --use-bitmap-index --count HEAD -- 1.t >actual &&
74 test_cmp expect actual
75 '
76
77 test_expect_success "enumerate --objects ($state)" '
78 git rev-list --objects --use-bitmap-index HEAD >tmp &&
79 cut -d" " -f1 <tmp >tmp2 &&
80 sort <tmp2 >actual &&
81 git rev-list --objects HEAD >tmp &&
82 cut -d" " -f1 <tmp >tmp2 &&
83 sort <tmp2 >expect &&
84 test_cmp expect actual
85 '
86
87 test_expect_success "bitmap --objects handles non-commit objects ($state)" '
88 git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
89 grep $blob actual
90 '
91 }
92
93 rev_list_tests 'full bitmap'
94
95 test_expect_success 'clone from bitmapped repository' '
96 git clone --no-local --bare . clone.git &&
97 git rev-parse HEAD >expect &&
98 git --git-dir=clone.git rev-parse HEAD >actual &&
99 test_cmp expect actual
100 '
101
102 test_expect_success 'setup further non-bitmapped commits' '
103 test_commit_bulk --id=further 10
104 '
105
106 rev_list_tests 'partial bitmap'
107
108 test_expect_success 'fetch (partial bitmap)' '
109 git --git-dir=clone.git fetch origin master:master &&
110 git rev-parse HEAD >expect &&
111 git --git-dir=clone.git rev-parse HEAD >actual &&
112 test_cmp expect actual
113 '
114
115 test_expect_success 'incremental repack fails when bitmaps are requested' '
116 test_commit more-1 &&
117 test_must_fail git repack -d 2>err &&
118 test_i18ngrep "Incremental repacks are incompatible with bitmap" err
119 '
120
121 test_expect_success 'incremental repack can disable bitmaps' '
122 test_commit more-2 &&
123 git repack -d --no-write-bitmap-index
124 '
125
126 test_expect_success 'pack-objects respects --local (non-local loose)' '
127 git init --bare alt.git &&
128 echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
129 echo content1 >file1 &&
130 # non-local loose object which is not present in bitmapped pack
131 altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
132 # non-local loose object which is also present in bitmapped pack
133 git cat-file blob $blob | GIT_DIR=alt.git git hash-object -w --stdin &&
134 git add file1 &&
135 test_tick &&
136 git commit -m commit_file1 &&
137 echo HEAD | git pack-objects --local --stdout --revs >1.pack &&
138 git index-pack 1.pack &&
139 list_packed_objects 1.idx >1.objects &&
140 printf "%s\n" "$altblob" "$blob" >nonlocal-loose &&
141 ! has_any nonlocal-loose 1.objects
142 '
143
144 test_expect_success 'pack-objects respects --honor-pack-keep (local non-bitmapped pack)' '
145 echo content2 >file2 &&
146 blob2=$(git hash-object -w file2) &&
147 git add file2 &&
148 test_tick &&
149 git commit -m commit_file2 &&
150 printf "%s\n" "$blob2" "$bitmaptip" >keepobjects &&
151 pack2=$(git pack-objects pack2 <keepobjects) &&
152 mv pack2-$pack2.* .git/objects/pack/ &&
153 >.git/objects/pack/pack2-$pack2.keep &&
154 rm $(objpath $blob2) &&
155 echo HEAD | git pack-objects --honor-pack-keep --stdout --revs >2a.pack &&
156 git index-pack 2a.pack &&
157 list_packed_objects 2a.idx >2a.objects &&
158 ! has_any keepobjects 2a.objects
159 '
160
161 test_expect_success 'pack-objects respects --local (non-local pack)' '
162 mv .git/objects/pack/pack2-$pack2.* alt.git/objects/pack/ &&
163 echo HEAD | git pack-objects --local --stdout --revs >2b.pack &&
164 git index-pack 2b.pack &&
165 list_packed_objects 2b.idx >2b.objects &&
166 ! has_any keepobjects 2b.objects
167 '
168
169 test_expect_success 'pack-objects respects --honor-pack-keep (local bitmapped pack)' '
170 ls .git/objects/pack/ | grep bitmap >output &&
171 test_line_count = 1 output &&
172 packbitmap=$(basename $(cat output) .bitmap) &&
173 list_packed_objects .git/objects/pack/$packbitmap.idx >packbitmap.objects &&
174 test_when_finished "rm -f .git/objects/pack/$packbitmap.keep" &&
175 >.git/objects/pack/$packbitmap.keep &&
176 echo HEAD | git pack-objects --honor-pack-keep --stdout --revs >3a.pack &&
177 git index-pack 3a.pack &&
178 list_packed_objects 3a.idx >3a.objects &&
179 ! has_any packbitmap.objects 3a.objects
180 '
181
182 test_expect_success 'pack-objects respects --local (non-local bitmapped pack)' '
183 mv .git/objects/pack/$packbitmap.* alt.git/objects/pack/ &&
184 rm -f .git/objects/pack/multi-pack-index &&
185 test_when_finished "mv alt.git/objects/pack/$packbitmap.* .git/objects/pack/" &&
186 echo HEAD | git pack-objects --local --stdout --revs >3b.pack &&
187 git index-pack 3b.pack &&
188 list_packed_objects 3b.idx >3b.objects &&
189 ! has_any packbitmap.objects 3b.objects
190 '
191
192 test_expect_success 'pack-objects to file can use bitmap' '
193 # make sure we still have 1 bitmap index from previous tests
194 ls .git/objects/pack/ | grep bitmap >output &&
195 test_line_count = 1 output &&
196 # verify equivalent packs are generated with/without using bitmap index
197 packasha1=$(git pack-objects --no-use-bitmap-index --all packa </dev/null) &&
198 packbsha1=$(git pack-objects --use-bitmap-index --all packb </dev/null) &&
199 list_packed_objects packa-$packasha1.idx >packa.objects &&
200 list_packed_objects packb-$packbsha1.idx >packb.objects &&
201 test_cmp packa.objects packb.objects
202 '
203
204 test_expect_success 'full repack, reusing previous bitmaps' '
205 git repack -ad &&
206 ls .git/objects/pack/ | grep bitmap >output &&
207 test_line_count = 1 output
208 '
209
210 test_expect_success 'fetch (full bitmap)' '
211 git --git-dir=clone.git fetch origin master:master &&
212 git rev-parse HEAD >expect &&
213 git --git-dir=clone.git rev-parse HEAD >actual &&
214 test_cmp expect actual
215 '
216
217 test_expect_success 'create objects for missing-HAVE tests' '
218 blob=$(echo "missing have" | git hash-object -w --stdin) &&
219 tree=$(printf "100644 blob $blob\tfile\n" | git mktree) &&
220 parent=$(echo parent | git commit-tree $tree) &&
221 commit=$(echo commit | git commit-tree $tree -p $parent) &&
222 cat >revs <<-EOF
223 HEAD
224 ^HEAD^
225 ^$commit
226 EOF
227 '
228
229 test_expect_success 'pack-objects respects --incremental' '
230 cat >revs2 <<-EOF &&
231 HEAD
232 $commit
233 EOF
234 git pack-objects --incremental --stdout --revs <revs2 >4.pack &&
235 git index-pack 4.pack &&
236 list_packed_objects 4.idx >4.objects &&
237 test_line_count = 4 4.objects &&
238 git rev-list --objects $commit >revlist &&
239 cut -d" " -f1 revlist |sort >objects &&
240 test_cmp 4.objects objects
241 '
242
243 test_expect_success 'pack with missing blob' '
244 rm $(objpath $blob) &&
245 git pack-objects --stdout --revs <revs >/dev/null
246 '
247
248 test_expect_success 'pack with missing tree' '
249 rm $(objpath $tree) &&
250 git pack-objects --stdout --revs <revs >/dev/null
251 '
252
253 test_expect_success 'pack with missing parent' '
254 rm $(objpath $parent) &&
255 git pack-objects --stdout --revs <revs >/dev/null
256 '
257
258 test_expect_success JGIT 'we can read jgit bitmaps' '
259 git clone --bare . compat-jgit.git &&
260 (
261 cd compat-jgit.git &&
262 rm -f objects/pack/*.bitmap &&
263 jgit gc &&
264 git rev-list --test-bitmap HEAD
265 )
266 '
267
268 test_expect_success JGIT 'jgit can read our bitmaps' '
269 git clone --bare . compat-us.git &&
270 (
271 cd compat-us.git &&
272 git repack -adb &&
273 # jgit gc will barf if it does not like our bitmaps
274 jgit gc
275 )
276 '
277
278 test_expect_success 'splitting packs does not generate bogus bitmaps' '
279 test-tool genrandom foo $((1024 * 1024)) >rand &&
280 git add rand &&
281 git commit -m "commit with big file" &&
282 git -c pack.packSizeLimit=500k repack -adb &&
283 git init --bare no-bitmaps.git &&
284 git -C no-bitmaps.git fetch .. HEAD
285 '
286
287 test_expect_success 'set up reusable pack' '
288 rm -f .git/objects/pack/*.keep &&
289 git repack -adb &&
290 reusable_pack () {
291 git for-each-ref --format="%(objectname)" |
292 git pack-objects --delta-base-offset --revs --stdout "$@"
293 }
294 '
295
296 test_expect_success 'pack reuse respects --honor-pack-keep' '
297 test_when_finished "rm -f .git/objects/pack/*.keep" &&
298 for i in .git/objects/pack/*.pack
299 do
300 >${i%.pack}.keep
301 done &&
302 reusable_pack --honor-pack-keep >empty.pack &&
303 git index-pack empty.pack &&
304 git show-index <empty.idx >actual &&
305 test_must_be_empty actual
306 '
307
308 test_expect_success 'pack reuse respects --local' '
309 mv .git/objects/pack/* alt.git/objects/pack/ &&
310 test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
311 reusable_pack --local >empty.pack &&
312 git index-pack empty.pack &&
313 git show-index <empty.idx >actual &&
314 test_must_be_empty actual
315 '
316
317 test_expect_success 'pack reuse respects --incremental' '
318 reusable_pack --incremental >empty.pack &&
319 git index-pack empty.pack &&
320 git show-index <empty.idx >actual &&
321 test_must_be_empty actual
322 '
323
324 test_expect_success 'truncated bitmap fails gracefully' '
325 git repack -ad &&
326 git rev-list --use-bitmap-index --count --all >expect &&
327 bitmap=$(ls .git/objects/pack/*.bitmap) &&
328 test_when_finished "rm -f $bitmap" &&
329 test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
330 mv -f $bitmap.tmp $bitmap &&
331 git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
332 test_cmp expect actual &&
333 test_i18ngrep corrupt stderr
334 '
335
336 # have_delta <obj> <expected_base>
337 #
338 # Note that because this relies on cat-file, it might find _any_ copy of an
339 # object in the repository. The caller is responsible for making sure
340 # there's only one (e.g., via "repack -ad", or having just fetched a copy).
341 have_delta () {
342 echo $2 >expect &&
343 echo $1 | git cat-file --batch-check="%(deltabase)" >actual &&
344 test_cmp expect actual
345 }
346
347 # Create a state of history with these properties:
348 #
349 # - refs that allow a client to fetch some new history, while sharing some old
350 # history with the server; we use branches delta-reuse-old and
351 # delta-reuse-new here
352 #
353 # - the new history contains an object that is stored on the server as a delta
354 # against a base that is in the old history
355 #
356 # - the base object is not immediately reachable from the tip of the old
357 # history; finding it would involve digging down through history we know the
358 # other side has
359 #
360 # This should result in a state where fetching from old->new would not
361 # traditionally reuse the on-disk delta (because we'd have to dig to realize
362 # that the client has it), but we will do so if bitmaps can tell us cheaply
363 # that the other side has it.
364 test_expect_success 'set up thin delta-reuse parent' '
365 # This first commit contains the buried base object.
366 test-tool genrandom delta 16384 >file &&
367 git add file &&
368 git commit -m "delta base" &&
369 base=$(git rev-parse --verify HEAD:file) &&
370
371 # These intermediate commits bury the base back in history.
372 # This becomes the "old" state.
373 for i in 1 2 3 4 5
374 do
375 echo $i >file &&
376 git commit -am "intermediate $i" || return 1
377 done &&
378 git branch delta-reuse-old &&
379
380 # And now our new history has a delta against the buried base. Note
381 # that this must be smaller than the original file, since pack-objects
382 # prefers to create deltas from smaller objects to larger.
383 test-tool genrandom delta 16300 >file &&
384 git commit -am "delta result" &&
385 delta=$(git rev-parse --verify HEAD:file) &&
386 git branch delta-reuse-new &&
387
388 # Repack with bitmaps and double check that we have the expected delta
389 # relationship.
390 git repack -adb &&
391 have_delta $delta $base
392 '
393
394 # Now we can sanity-check the non-bitmap behavior (that the server is not able
395 # to reuse the delta). This isn't strictly something we care about, so this
396 # test could be scrapped in the future. But it makes sure that the next test is
397 # actually triggering the feature we want.
398 #
399 # Note that our tools for working with on-the-wire "thin" packs are limited. So
400 # we actually perform the fetch, retain the resulting pack, and inspect the
401 # result.
402 test_expect_success 'fetch without bitmaps ignores delta against old base' '
403 test_config pack.usebitmaps false &&
404 test_when_finished "rm -rf client.git" &&
405 git init --bare client.git &&
406 (
407 cd client.git &&
408 git config transfer.unpackLimit 1 &&
409 git fetch .. delta-reuse-old:delta-reuse-old &&
410 git fetch .. delta-reuse-new:delta-reuse-new &&
411 have_delta $delta $ZERO_OID
412 )
413 '
414
415 # And do the same for the bitmap case, where we do expect to find the delta.
416 test_expect_success 'fetch with bitmaps can reuse old base' '
417 test_config pack.usebitmaps true &&
418 test_when_finished "rm -rf client.git" &&
419 git init --bare client.git &&
420 (
421 cd client.git &&
422 git config transfer.unpackLimit 1 &&
423 git fetch .. delta-reuse-old:delta-reuse-old &&
424 git fetch .. delta-reuse-new:delta-reuse-new &&
425 have_delta $delta $base
426 )
427 '
428
429 test_done