[thirdparty/git.git] / t / t5310-pack-bitmaps.sh

#!/bin/sh

test_description='exercise basic bitmap functionality'
. ./test-lib.sh

objpath () {
	echo ".git/objects/$(echo "$1" | sed -e 's|\(..\)|\1/|')"
}

# show objects present in pack ($1 should be associated *.idx)
list_packed_objects () {
	git show-index <"$1" >object-list &&
	cut -d' ' -f2 object-list
}

# has_any pattern-file content-file
# tests whether content-file has any entry from pattern-file with entries being
# whole lines.
has_any () {
	grep -Ff "$1" "$2"
}

test_expect_success 'setup repo with moderate-sized history' '
	test_commit_bulk --id=file 100 &&
	git checkout -b other HEAD~5 &&
	test_commit_bulk --id=side 10 &&
	git checkout master &&
	bitmaptip=$(git rev-parse master) &&
	blob=$(echo tagged-blob | git hash-object -w --stdin) &&
	git tag tagged-blob $blob &&
	git config repack.writebitmaps true
'

test_expect_success 'full repack creates bitmaps' '
	git repack -ad &&
	ls .git/objects/pack/ | grep bitmap >output &&
	test_line_count = 1 output
'

test_expect_success 'rev-list --test-bitmap verifies bitmaps' '
	git rev-list --test-bitmap HEAD
'

rev_list_tests() {
	state=$1

	test_expect_success "counting commits via bitmap ($state)" '
		git rev-list --count HEAD >expect &&
		git rev-list --use-bitmap-index --count HEAD >actual &&
		test_cmp expect actual
	'

	test_expect_success "counting partial commits via bitmap ($state)" '
		git rev-list --count HEAD~5..HEAD >expect &&
		git rev-list --use-bitmap-index --count HEAD~5..HEAD >actual &&
		test_cmp expect actual
	'

	test_expect_success "counting commits with limit ($state)" '
		git rev-list --count -n 1 HEAD >expect &&
		git rev-list --use-bitmap-index --count -n 1 HEAD >actual &&
		test_cmp expect actual
	'

	test_expect_success "counting non-linear history ($state)" '
		git rev-list --count other...master >expect &&
		git rev-list --use-bitmap-index --count other...master >actual &&
		test_cmp expect actual
	'

	test_expect_success "counting commits with limiting ($state)" '
		git rev-list --count HEAD -- 1.t >expect &&
		git rev-list --use-bitmap-index --count HEAD -- 1.t >actual &&
		test_cmp expect actual
	'

	test_expect_success "enumerate --objects ($state)" '
		git rev-list --objects --use-bitmap-index HEAD >tmp &&
		cut -d" " -f1 <tmp >tmp2 &&
		sort <tmp2 >actual &&
		git rev-list --objects HEAD >tmp &&
		cut -d" " -f1 <tmp >tmp2 &&
		sort <tmp2 >expect &&
		test_cmp expect actual
	'

	test_expect_success "bitmap --objects handles non-commit objects ($state)" '
		git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
		grep $blob actual
	'
}

rev_list_tests 'full bitmap'

test_expect_success 'clone from bitmapped repository' '
	git clone --no-local --bare . clone.git &&
	git rev-parse HEAD >expect &&
	git --git-dir=clone.git rev-parse HEAD >actual &&
	test_cmp expect actual
'

test_expect_success 'setup further non-bitmapped commits' '
	test_commit_bulk --id=further 10
'

rev_list_tests 'partial bitmap'

test_expect_success 'fetch (partial bitmap)' '
	git --git-dir=clone.git fetch origin master:master &&
	git rev-parse HEAD >expect &&
	git --git-dir=clone.git rev-parse HEAD >actual &&
	test_cmp expect actual
'

test_expect_success 'incremental repack fails when bitmaps are requested' '
	test_commit more-1 &&
	test_must_fail git repack -d 2>err &&
	test_i18ngrep "Incremental repacks are incompatible with bitmap" err
'

test_expect_success 'incremental repack can disable bitmaps' '
	test_commit more-2 &&
	git repack -d --no-write-bitmap-index
'

test_expect_success 'pack-objects respects --local (non-local loose)' '
	git init --bare alt.git &&
	echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
	echo content1 >file1 &&
	# non-local loose object which is not present in bitmapped pack
	altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
	# non-local loose object which is also present in bitmapped pack
	git cat-file blob $blob | GIT_DIR=alt.git git hash-object -w --stdin &&
	git add file1 &&
	test_tick &&
	git commit -m commit_file1 &&
	echo HEAD | git pack-objects --local --stdout --revs >1.pack &&
	git index-pack 1.pack &&
	list_packed_objects 1.idx >1.objects &&
	printf "%s\n" "$altblob" "$blob" >nonlocal-loose &&
	! has_any nonlocal-loose 1.objects
'

test_expect_success 'pack-objects respects --honor-pack-keep (local non-bitmapped pack)' '
	echo content2 >file2 &&
	blob2=$(git hash-object -w file2) &&
	git add file2 &&
	test_tick &&
	git commit -m commit_file2 &&
	printf "%s\n" "$blob2" "$bitmaptip" >keepobjects &&
	pack2=$(git pack-objects pack2 <keepobjects) &&
	mv pack2-$pack2.* .git/objects/pack/ &&
	>.git/objects/pack/pack2-$pack2.keep &&
	rm $(objpath $blob2) &&
	echo HEAD | git pack-objects --honor-pack-keep --stdout --revs >2a.pack &&
	git index-pack 2a.pack &&
	list_packed_objects 2a.idx >2a.objects &&
	! has_any keepobjects 2a.objects
'

test_expect_success 'pack-objects respects --local (non-local pack)' '
	mv .git/objects/pack/pack2-$pack2.* alt.git/objects/pack/ &&
	echo HEAD | git pack-objects --local --stdout --revs >2b.pack &&
	git index-pack 2b.pack &&
	list_packed_objects 2b.idx >2b.objects &&
	! has_any keepobjects 2b.objects
'

test_expect_success 'pack-objects respects --honor-pack-keep (local bitmapped pack)' '
	ls .git/objects/pack/ | grep bitmap >output &&
	test_line_count = 1 output &&
	packbitmap=$(basename $(cat output) .bitmap) &&
	list_packed_objects .git/objects/pack/$packbitmap.idx >packbitmap.objects &&
	test_when_finished "rm -f .git/objects/pack/$packbitmap.keep" &&
	>.git/objects/pack/$packbitmap.keep &&
	echo HEAD | git pack-objects --honor-pack-keep --stdout --revs >3a.pack &&
	git index-pack 3a.pack &&
	list_packed_objects 3a.idx >3a.objects &&
	! has_any packbitmap.objects 3a.objects
'

test_expect_success 'pack-objects respects --local (non-local bitmapped pack)' '
	mv .git/objects/pack/$packbitmap.* alt.git/objects/pack/ &&
	rm -f .git/objects/pack/multi-pack-index &&
	test_when_finished "mv alt.git/objects/pack/$packbitmap.* .git/objects/pack/" &&
	echo HEAD | git pack-objects --local --stdout --revs >3b.pack &&
	git index-pack 3b.pack &&
	list_packed_objects 3b.idx >3b.objects &&
	! has_any packbitmap.objects 3b.objects
'

test_expect_success 'pack-objects to file can use bitmap' '
	# make sure we still have 1 bitmap index from previous tests
	ls .git/objects/pack/ | grep bitmap >output &&
	test_line_count = 1 output &&
	# verify equivalent packs are generated with/without using bitmap index
	packasha1=$(git pack-objects --no-use-bitmap-index --all packa </dev/null) &&
	packbsha1=$(git pack-objects --use-bitmap-index --all packb </dev/null) &&
	list_packed_objects packa-$packasha1.idx >packa.objects &&
	list_packed_objects packb-$packbsha1.idx >packb.objects &&
	test_cmp packa.objects packb.objects
'

test_expect_success 'full repack, reusing previous bitmaps' '
	git repack -ad &&
	ls .git/objects/pack/ | grep bitmap >output &&
	test_line_count = 1 output
'

test_expect_success 'fetch (full bitmap)' '
	git --git-dir=clone.git fetch origin master:master &&
	git rev-parse HEAD >expect &&
	git --git-dir=clone.git rev-parse HEAD >actual &&
	test_cmp expect actual
'

test_expect_success 'create objects for missing-HAVE tests' '
	blob=$(echo "missing have" | git hash-object -w --stdin) &&
	tree=$(printf "100644 blob $blob\tfile\n" | git mktree) &&
	parent=$(echo parent | git commit-tree $tree) &&
	commit=$(echo commit | git commit-tree $tree -p $parent) &&
	cat >revs <<-EOF
	HEAD
	^HEAD^
	^$commit
	EOF
'

test_expect_success 'pack-objects respects --incremental' '
	cat >revs2 <<-EOF &&
	HEAD
	$commit
	EOF
	git pack-objects --incremental --stdout --revs <revs2 >4.pack &&
	git index-pack 4.pack &&
	list_packed_objects 4.idx >4.objects &&
	test_line_count = 4 4.objects &&
	git rev-list --objects $commit >revlist &&
	cut -d" " -f1 revlist |sort >objects &&
	test_cmp 4.objects objects
'

test_expect_success 'pack with missing blob' '
	rm $(objpath $blob) &&
	git pack-objects --stdout --revs <revs >/dev/null
'

test_expect_success 'pack with missing tree' '
	rm $(objpath $tree) &&
	git pack-objects --stdout --revs <revs >/dev/null
'

test_expect_success 'pack with missing parent' '
	rm $(objpath $parent) &&
	git pack-objects --stdout --revs <revs >/dev/null
'

test_expect_success JGIT 'we can read jgit bitmaps' '
	git clone --bare . compat-jgit.git &&
	(
		cd compat-jgit.git &&
		rm -f objects/pack/*.bitmap &&
		jgit gc &&
		git rev-list --test-bitmap HEAD
	)
'

test_expect_success JGIT 'jgit can read our bitmaps' '
	git clone --bare . compat-us.git &&
	(
		cd compat-us.git &&
		git repack -adb &&
		# jgit gc will barf if it does not like our bitmaps
		jgit gc
	)
'

test_expect_success 'splitting packs does not generate bogus bitmaps' '
	test-tool genrandom foo $((1024 * 1024)) >rand &&
	git add rand &&
	git commit -m "commit with big file" &&
	git -c pack.packSizeLimit=500k repack -adb &&
	git init --bare no-bitmaps.git &&
	git -C no-bitmaps.git fetch .. HEAD
'

test_expect_success 'set up reusable pack' '
	rm -f .git/objects/pack/*.keep &&
	git repack -adb &&
	reusable_pack () {
		git for-each-ref --format="%(objectname)" |
		git pack-objects --delta-base-offset --revs --stdout "$@"
	}
'

test_expect_success 'pack reuse respects --honor-pack-keep' '
	test_when_finished "rm -f .git/objects/pack/*.keep" &&
	for i in .git/objects/pack/*.pack
	do
		>${i%.pack}.keep
	done &&
	reusable_pack --honor-pack-keep >empty.pack &&
	git index-pack empty.pack &&
	git show-index <empty.idx >actual &&
	test_must_be_empty actual
'

test_expect_success 'pack reuse respects --local' '
	mv .git/objects/pack/* alt.git/objects/pack/ &&
	test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
	reusable_pack --local >empty.pack &&
	git index-pack empty.pack &&
	git show-index <empty.idx >actual &&
	test_must_be_empty actual
'

test_expect_success 'pack reuse respects --incremental' '
	reusable_pack --incremental >empty.pack &&
	git index-pack empty.pack &&
	git show-index <empty.idx >actual &&
	test_must_be_empty actual
'

test_expect_success 'truncated bitmap fails gracefully' '
	git repack -ad &&
	git rev-list --use-bitmap-index --count --all >expect &&
	bitmap=$(ls .git/objects/pack/*.bitmap) &&
	test_when_finished "rm -f $bitmap" &&
	test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
	mv -f $bitmap.tmp $bitmap &&
	git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
	test_cmp expect actual &&
	test_i18ngrep corrupt stderr
'

# have_delta <obj> <expected_base>
#
# Note that because this relies on cat-file, it might find _any_ copy of an
# object in the repository. The caller is responsible for making sure
# there's only one (e.g., via "repack -ad", or having just fetched a copy).
have_delta () {
	echo $2 >expect &&
	echo $1 | git cat-file --batch-check="%(deltabase)" >actual &&
	test_cmp expect actual
}

# Create a state of history with these properties:
#
#  - refs that allow a client to fetch some new history, while sharing some old
#    history with the server; we use branches delta-reuse-old and
#    delta-reuse-new here
#
#  - the new history contains an object that is stored on the server as a delta
#    against a base that is in the old history
#
#  - the base object is not immediately reachable from the tip of the old
#    history; finding it would involve digging down through history we know the
#    other side has
#
# This should result in a state where fetching from old->new would not
# traditionally reuse the on-disk delta (because we'd have to dig to realize
# that the client has it), but we will do so if bitmaps can tell us cheaply
# that the other side has it.
test_expect_success 'set up thin delta-reuse parent' '
	# This first commit contains the buried base object.
	test-tool genrandom delta 16384 >file &&
	git add file &&
	git commit -m "delta base" &&
	base=$(git rev-parse --verify HEAD:file) &&

	# These intermediate commits bury the base back in history.
	# This becomes the "old" state.
	for i in 1 2 3 4 5
	do
		echo $i >file &&
		git commit -am "intermediate $i" || return 1
	done &&
	git branch delta-reuse-old &&

	# And now our new history has a delta against the buried base. Note
	# that this must be smaller than the original file, since pack-objects
	# prefers to create deltas from smaller objects to larger.
	test-tool genrandom delta 16300 >file &&
	git commit -am "delta result" &&
	delta=$(git rev-parse --verify HEAD:file) &&
	git branch delta-reuse-new &&

	# Repack with bitmaps and double check that we have the expected delta
	# relationship.
	git repack -adb &&
	have_delta $delta $base
'

# Now we can sanity-check the non-bitmap behavior (that the server is not able
# to reuse the delta). This isn't strictly something we care about, so this
# test could be scrapped in the future. But it makes sure that the next test is
# actually triggering the feature we want.
#
# Note that our tools for working with on-the-wire "thin" packs are limited. So
# we actually perform the fetch, retain the resulting pack, and inspect the
# result.
test_expect_success 'fetch without bitmaps ignores delta against old base' '
	test_config pack.usebitmaps false &&
	test_when_finished "rm -rf client.git" &&
	git init --bare client.git &&
	(
		cd client.git &&
		git config transfer.unpackLimit 1 &&
		git fetch .. delta-reuse-old:delta-reuse-old &&
		git fetch .. delta-reuse-new:delta-reuse-new &&
		have_delta $delta $ZERO_OID
	)
'

# And do the same for the bitmap case, where we do expect to find the delta.
test_expect_success 'fetch with bitmaps can reuse old base' '
	test_config pack.usebitmaps true &&
	test_when_finished "rm -rf client.git" &&
	git init --bare client.git &&
	(
		cd client.git &&
		git config transfer.unpackLimit 1 &&
		git fetch .. delta-reuse-old:delta-reuse-old &&
		git fetch .. delta-reuse-new:delta-reuse-new &&
		have_delta $delta $base
	)
'

test_done
Commit	Line	Data
212f2ffb JK	1	#!/bin/sh
	2
	3	test_description='exercise basic bitmap functionality'
	4	. ./test-lib.sh
	5
2db1a43f VM	6	objpath () {
	7	echo ".git/objects/$(echo "$1" \| sed -e 's\|\(..\)\|\1/\|')"
	8	}
	9
702d1b95 KS	10	# show objects present in pack ($1 should be associated *.idx)
702d1b95 KS	11	list_packed_objects () {
10c60017 SG	12	git show-index <"$1" >object-list &&
10c60017 SG	13	cut -d' ' -f2 object-list
702d1b95 KS	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" "$2"
	21	}
	22
212f2ffb	23	test_expect_success 'setup repo with moderate-sized history' '
1ac96cd1	24	test_commit_bulk --id=file 100 &&
212f2ffb	25	git checkout -b other HEAD~5 &&
b1c36cb8	26	test_commit_bulk --id=side 10 &&
212f2ffb	27	git checkout master &&
702d1b95	28	bitmaptip=$(git rev-parse master) &&
212f2ffb JK	29	blob=$(echo tagged-blob \| git hash-object -w --stdin) &&
212f2ffb JK	30	git tag tagged-blob $blob &&
d4316604	31	git config repack.writebitmaps true
212f2ffb JK	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 ($state)" '
	54	git rev-list --count HEAD~5..HEAD >expect &&
	55	git rev-list --use-bitmap-index --count HEAD~5..HEAD >actual &&
	56	test_cmp expect actual
	57	'
	58
5c9f9bf3 JK	59	test_expect_success "counting commits with limit ($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
212f2ffb JK	65	test_expect_success "counting non-linear history ($state)" '
	66	git rev-list --count other...master >expect &&
	67	git rev-list --use-bitmap-index --count other...master >actual &&
	68	test_cmp expect actual
	69	'
	70
c8a70d35 JK	71	test_expect_success "counting commits with limiting ($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
212f2ffb JK	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' '
b1c36cb8	103	test_commit_bulk --id=further 10
212f2ffb JK	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
1c409a70	115	test_expect_success 'incremental repack fails when bitmaps are requested' '
212f2ffb	116	test_commit more-1 &&
1c409a70 DT	117	test_must_fail git repack -d 2>err &&
1c409a70 DT	118	test_i18ngrep "Incremental repacks are incompatible with bitmap" err
212f2ffb JK	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
702d1b95 KS	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/$packbitmap.* alt.git/objects/pack/ &&
0465a505	184	rm -f .git/objects/pack/multi-pack-index &&
702d1b95 KS	185	test_when_finished "mv alt.git/objects/pack/$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
645c432d KS	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) &&
10c60017 SG	199	list_packed_objects packa-$packasha1.idx >packa.objects &&
10c60017 SG	200	list_packed_objects packb-$packbsha1.idx >packb.objects &&
645c432d KS	201	test_cmp packa.objects packb.objects
	202	'
	203
212f2ffb JK	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
2db1a43f VM	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
702d1b95 KS	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
2db1a43f VM	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
212f2ffb	258	test_expect_success JGIT 'we can read jgit bitmaps' '
87a6bb70	259	git clone --bare . compat-jgit.git &&
212f2ffb	260	(
87a6bb70	261	cd compat-jgit.git &&
90ca1495	262	rm -f objects/pack/*.bitmap &&
212f2ffb JK	263	jgit gc &&
	264	git rev-list --test-bitmap HEAD
	265	)
	266	'
	267
	268	test_expect_success JGIT 'jgit can read our bitmaps' '
87a6bb70	269	git clone --bare . compat-us.git &&
212f2ffb	270	(
87a6bb70	271	cd compat-us.git &&
212f2ffb JK	272	git repack -adb &&
	273	# jgit gc will barf if it does not like our bitmaps
	274	jgit gc
	275	)
	276	'
	277
21134714	278	test_expect_success 'splitting packs does not generate bogus bitmaps' '
c680668d	279	test-tool genrandom foo $((1024 * 1024)) >rand &&
21134714 JK	280	git add rand &&
	281	git commit -m "commit with big file" &&
	282	git -c pack.packSizeLimit=500k repack -adb &&
	283	git init --bare no-bitmaps.git &&
	284	git -C no-bitmaps.git fetch .. HEAD
	285	'
	286
9df4a607 JK	287	test_expect_success 'set up reusable pack' '
	288	rm -f .git/objects/pack/*.keep &&
	289	git repack -adb &&
	290	reusable_pack () {
	291	git for-each-ref --format="%(objectname)" \|
	292	git pack-objects --delta-base-offset --revs --stdout "$@"
	293	}
	294	'
	295
	296	test_expect_success 'pack reuse respects --honor-pack-keep' '
	297	test_when_finished "rm -f .git/objects/pack/*.keep" &&
da5a1f81 JK	298	for i in .git/objects/pack/*.pack
da5a1f81 JK	299	do
9df4a607 JK	300	>${i%.pack}.keep
	301	done &&
	302	reusable_pack --honor-pack-keep >empty.pack &&
	303	git index-pack empty.pack &&
9df4a607	304	git show-index <empty.idx >actual &&
d3c6751b	305	test_must_be_empty actual
9df4a607 JK	306	'
	307
	308	test_expect_success 'pack reuse respects --local' '
	309	mv .git/objects/pack/* alt.git/objects/pack/ &&
	310	test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
	311	reusable_pack --local >empty.pack &&
	312	git index-pack empty.pack &&
9df4a607	313	git show-index <empty.idx >actual &&
d3c6751b	314	test_must_be_empty actual
9df4a607 JK	315	'
	316
	317	test_expect_success 'pack reuse respects --incremental' '
	318	reusable_pack --incremental >empty.pack &&
	319	git index-pack empty.pack &&
9df4a607	320	git show-index <empty.idx >actual &&
d3c6751b	321	test_must_be_empty actual
9df4a607	322	'
9d2e330b JK	323
	324	test_expect_success 'truncated bitmap fails gracefully' '
	325	git repack -ad &&
	326	git rev-list --use-bitmap-index --count --all >expect &&
	327	bitmap=$(ls .git/objects/pack/*.bitmap) &&
	328	test_when_finished "rm -f $bitmap" &&
2a59a6ef	329	test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
9d2e330b JK	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
c0d61dfc JK	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
212f2ffb	429	test_done