[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' '
	for i in $(test_seq 1 10)
	do
		test_commit $i
	done &&
	git checkout -b other HEAD~5 &&
	for i in $(test_seq 1 10)
	do
		test_commit side-$i
	done &&
	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 &&
	git config pack.writebitmaphashcache 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' '
	for i in $(test_seq 1 10)
	do
		test_commit further-$i
	done
'

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/$packbitmap.* alt.git/objects/pack/ &&
	test_when_finished "mv alt.git/objects/pack/$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 .git/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' '
da5a1f81 JK	24	for i in $(test_seq 1 10)
da5a1f81 JK	25	do
212f2ffb JK	26	test_commit $i
	27	done &&
	28	git checkout -b other HEAD~5 &&
da5a1f81 JK	29	for i in $(test_seq 1 10)
da5a1f81 JK	30	do
212f2ffb JK	31	test_commit side-$i
	32	done &&
	33	git checkout master &&
702d1b95	34	bitmaptip=$(git rev-parse master) &&
212f2ffb JK	35	blob=$(echo tagged-blob \| git hash-object -w --stdin) &&
212f2ffb JK	36	git tag tagged-blob $blob &&
71d76cb4	37	git config repack.writebitmaps true &&
ae4f07fb	38	git config pack.writebitmaphashcache true
212f2ffb JK	39	'
	40
	41	test_expect_success 'full repack creates bitmaps' '
	42	git repack -ad &&
	43	ls .git/objects/pack/ \| grep bitmap >output &&
	44	test_line_count = 1 output
	45	'
	46
	47	test_expect_success 'rev-list --test-bitmap verifies bitmaps' '
	48	git rev-list --test-bitmap HEAD
	49	'
	50
	51	rev_list_tests() {
	52	state=$1
	53
	54	test_expect_success "counting commits via bitmap ($state)" '
	55	git rev-list --count HEAD >expect &&
	56	git rev-list --use-bitmap-index --count HEAD >actual &&
	57	test_cmp expect actual
	58	'
	59
	60	test_expect_success "counting partial commits via bitmap ($state)" '
	61	git rev-list --count HEAD~5..HEAD >expect &&
	62	git rev-list --use-bitmap-index --count HEAD~5..HEAD >actual &&
	63	test_cmp expect actual
	64	'
	65
5c9f9bf3 JK	66	test_expect_success "counting commits with limit ($state)" '
	67	git rev-list --count -n 1 HEAD >expect &&
	68	git rev-list --use-bitmap-index --count -n 1 HEAD >actual &&
	69	test_cmp expect actual
	70	'
	71
212f2ffb JK	72	test_expect_success "counting non-linear history ($state)" '
	73	git rev-list --count other...master >expect &&
	74	git rev-list --use-bitmap-index --count other...master >actual &&
	75	test_cmp expect actual
	76	'
	77
c8a70d35 JK	78	test_expect_success "counting commits with limiting ($state)" '
	79	git rev-list --count HEAD -- 1.t >expect &&
	80	git rev-list --use-bitmap-index --count HEAD -- 1.t >actual &&
	81	test_cmp expect actual
	82	'
	83
212f2ffb JK	84	test_expect_success "enumerate --objects ($state)" '
	85	git rev-list --objects --use-bitmap-index HEAD >tmp &&
	86	cut -d" " -f1 <tmp >tmp2 &&
	87	sort <tmp2 >actual &&
	88	git rev-list --objects HEAD >tmp &&
	89	cut -d" " -f1 <tmp >tmp2 &&
	90	sort <tmp2 >expect &&
	91	test_cmp expect actual
	92	'
	93
	94	test_expect_success "bitmap --objects handles non-commit objects ($state)" '
	95	git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
	96	grep $blob actual
	97	'
	98	}
	99
	100	rev_list_tests 'full bitmap'
	101
	102	test_expect_success 'clone from bitmapped repository' '
	103	git clone --no-local --bare . clone.git &&
	104	git rev-parse HEAD >expect &&
	105	git --git-dir=clone.git rev-parse HEAD >actual &&
	106	test_cmp expect actual
	107	'
	108
	109	test_expect_success 'setup further non-bitmapped commits' '
da5a1f81 JK	110	for i in $(test_seq 1 10)
da5a1f81 JK	111	do
212f2ffb JK	112	test_commit further-$i
	113	done
	114	'
	115
	116	rev_list_tests 'partial bitmap'
	117
	118	test_expect_success 'fetch (partial bitmap)' '
	119	git --git-dir=clone.git fetch origin master:master &&
	120	git rev-parse HEAD >expect &&
	121	git --git-dir=clone.git rev-parse HEAD >actual &&
	122	test_cmp expect actual
	123	'
	124
1c409a70	125	test_expect_success 'incremental repack fails when bitmaps are requested' '
212f2ffb	126	test_commit more-1 &&
1c409a70 DT	127	test_must_fail git repack -d 2>err &&
1c409a70 DT	128	test_i18ngrep "Incremental repacks are incompatible with bitmap" err
212f2ffb JK	129	'
	130
	131	test_expect_success 'incremental repack can disable bitmaps' '
	132	test_commit more-2 &&
	133	git repack -d --no-write-bitmap-index
	134	'
	135
702d1b95 KS	136	test_expect_success 'pack-objects respects --local (non-local loose)' '
	137	git init --bare alt.git &&
	138	echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
	139	echo content1 >file1 &&
	140	# non-local loose object which is not present in bitmapped pack
	141	altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
	142	# non-local loose object which is also present in bitmapped pack
	143	git cat-file blob $blob \| GIT_DIR=alt.git git hash-object -w --stdin &&
	144	git add file1 &&
	145	test_tick &&
	146	git commit -m commit_file1 &&
	147	echo HEAD \| git pack-objects --local --stdout --revs >1.pack &&
	148	git index-pack 1.pack &&
	149	list_packed_objects 1.idx >1.objects &&
	150	printf "%s\n" "$altblob" "$blob" >nonlocal-loose &&
	151	! has_any nonlocal-loose 1.objects
	152	'
	153
	154	test_expect_success 'pack-objects respects --honor-pack-keep (local non-bitmapped pack)' '
	155	echo content2 >file2 &&
	156	blob2=$(git hash-object -w file2) &&
	157	git add file2 &&
	158	test_tick &&
	159	git commit -m commit_file2 &&
	160	printf "%s\n" "$blob2" "$bitmaptip" >keepobjects &&
	161	pack2=$(git pack-objects pack2 <keepobjects) &&
	162	mv pack2-$pack2.* .git/objects/pack/ &&
	163	>.git/objects/pack/pack2-$pack2.keep &&
	164	rm $(objpath $blob2) &&
	165	echo HEAD \| git pack-objects --honor-pack-keep --stdout --revs >2a.pack &&
	166	git index-pack 2a.pack &&
	167	list_packed_objects 2a.idx >2a.objects &&
	168	! has_any keepobjects 2a.objects
	169	'
	170
	171	test_expect_success 'pack-objects respects --local (non-local pack)' '
	172	mv .git/objects/pack/pack2-$pack2.* alt.git/objects/pack/ &&
	173	echo HEAD \| git pack-objects --local --stdout --revs >2b.pack &&
	174	git index-pack 2b.pack &&
	175	list_packed_objects 2b.idx >2b.objects &&
	176	! has_any keepobjects 2b.objects
	177	'
	178
	179	test_expect_success 'pack-objects respects --honor-pack-keep (local bitmapped pack)' '
	180	ls .git/objects/pack/ \| grep bitmap >output &&
	181	test_line_count = 1 output &&
	182	packbitmap=$(basename $(cat output) .bitmap) &&
	183	list_packed_objects .git/objects/pack/$packbitmap.idx >packbitmap.objects &&
	184	test_when_finished "rm -f .git/objects/pack/$packbitmap.keep" &&
	185	>.git/objects/pack/$packbitmap.keep &&
	186	echo HEAD \| git pack-objects --honor-pack-keep --stdout --revs >3a.pack &&
	187	git index-pack 3a.pack &&
	188	list_packed_objects 3a.idx >3a.objects &&
	189	! has_any packbitmap.objects 3a.objects
	190	'
	191
	192	test_expect_success 'pack-objects respects --local (non-local bitmapped pack)' '
	193	mv .git/objects/pack/$packbitmap.* alt.git/objects/pack/ &&
	194	test_when_finished "mv alt.git/objects/pack/$packbitmap.* .git/objects/pack/" &&
	195	echo HEAD \| git pack-objects --local --stdout --revs >3b.pack &&
	196	git index-pack 3b.pack &&
	197	list_packed_objects 3b.idx >3b.objects &&
	198	! has_any packbitmap.objects 3b.objects
	199	'
200
645c432d KS	201	test_expect_success 'pack-objects to file can use bitmap' '
	202	# make sure we still have 1 bitmap index from previous tests
	203	ls .git/objects/pack/ \| grep bitmap >output &&
	204	test_line_count = 1 output &&
	205	# verify equivalent packs are generated with/without using bitmap index
	206	packasha1=$(git pack-objects --no-use-bitmap-index --all packa </dev/null) &&
	207	packbsha1=$(git pack-objects --use-bitmap-index --all packb </dev/null) &&
10c60017 SG	208	list_packed_objects packa-$packasha1.idx >packa.objects &&
10c60017 SG	209	list_packed_objects packb-$packbsha1.idx >packb.objects &&
645c432d KS	210	test_cmp packa.objects packb.objects
	211	'
	212
212f2ffb JK	213	test_expect_success 'full repack, reusing previous bitmaps' '
	214	git repack -ad &&
	215	ls .git/objects/pack/ \| grep bitmap >output &&
	216	test_line_count = 1 output
	217	'
	218
	219	test_expect_success 'fetch (full bitmap)' '
	220	git --git-dir=clone.git fetch origin master:master &&
	221	git rev-parse HEAD >expect &&
	222	git --git-dir=clone.git rev-parse HEAD >actual &&
	223	test_cmp expect actual
	224	'
	225
2db1a43f VM	226	test_expect_success 'create objects for missing-HAVE tests' '
	227	blob=$(echo "missing have" \| git hash-object -w --stdin) &&
	228	tree=$(printf "100644 blob $blob\tfile\n" \| git mktree) &&
	229	parent=$(echo parent \| git commit-tree $tree) &&
	230	commit=$(echo commit \| git commit-tree $tree -p $parent) &&
	231	cat >revs <<-EOF
	232	HEAD
	233	^HEAD^
	234	^$commit
	235	EOF
	236	'
	237
702d1b95 KS	238	test_expect_success 'pack-objects respects --incremental' '
	239	cat >revs2 <<-EOF &&
	240	HEAD
	241	$commit
	242	EOF
	243	git pack-objects --incremental --stdout --revs <revs2 >4.pack &&
	244	git index-pack 4.pack &&
	245	list_packed_objects 4.idx >4.objects &&
	246	test_line_count = 4 4.objects &&
	247	git rev-list --objects $commit >revlist &&
	248	cut -d" " -f1 revlist \|sort >objects &&
	249	test_cmp 4.objects objects
	250	'
	251
2db1a43f VM	252	test_expect_success 'pack with missing blob' '
	253	rm $(objpath $blob) &&
	254	git pack-objects --stdout --revs <revs >/dev/null
	255	'
	256
	257	test_expect_success 'pack with missing tree' '
	258	rm $(objpath $tree) &&
	259	git pack-objects --stdout --revs <revs >/dev/null
	260	'
	261
	262	test_expect_success 'pack with missing parent' '
	263	rm $(objpath $parent) &&
	264	git pack-objects --stdout --revs <revs >/dev/null
	265	'
	266
212f2ffb	267	test_expect_success JGIT 'we can read jgit bitmaps' '
87a6bb70	268	git clone --bare . compat-jgit.git &&
212f2ffb	269	(
87a6bb70	270	cd compat-jgit.git &&
212f2ffb JK	271	rm -f .git/objects/pack/*.bitmap &&
	272	jgit gc &&
	273	git rev-list --test-bitmap HEAD
	274	)
	275	'
	276
	277	test_expect_success JGIT 'jgit can read our bitmaps' '
87a6bb70	278	git clone --bare . compat-us.git &&
212f2ffb	279	(
87a6bb70	280	cd compat-us.git &&
212f2ffb JK	281	git repack -adb &&
	282	# jgit gc will barf if it does not like our bitmaps
	283	jgit gc
	284	)
	285	'
	286
21134714	287	test_expect_success 'splitting packs does not generate bogus bitmaps' '
c680668d	288	test-tool genrandom foo $((1024 * 1024)) >rand &&
21134714 JK	289	git add rand &&
	290	git commit -m "commit with big file" &&
	291	git -c pack.packSizeLimit=500k repack -adb &&
	292	git init --bare no-bitmaps.git &&
	293	git -C no-bitmaps.git fetch .. HEAD
	294	'
	295
9df4a607 JK	296	test_expect_success 'set up reusable pack' '
	297	rm -f .git/objects/pack/*.keep &&
	298	git repack -adb &&
	299	reusable_pack () {
	300	git for-each-ref --format="%(objectname)" \|
	301	git pack-objects --delta-base-offset --revs --stdout "$@"
	302	}
	303	'
	304
	305	test_expect_success 'pack reuse respects --honor-pack-keep' '
	306	test_when_finished "rm -f .git/objects/pack/*.keep" &&
da5a1f81 JK	307	for i in .git/objects/pack/*.pack
da5a1f81 JK	308	do
9df4a607 JK	309	>${i%.pack}.keep
	310	done &&
	311	reusable_pack --honor-pack-keep >empty.pack &&
	312	git index-pack empty.pack &&
9df4a607	313	git show-index <empty.idx >actual &&
d3c6751b	314	test_must_be_empty actual
9df4a607 JK	315	'
	316
	317	test_expect_success 'pack reuse respects --local' '
	318	mv .git/objects/pack/* alt.git/objects/pack/ &&
	319	test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
	320	reusable_pack --local >empty.pack &&
	321	git index-pack empty.pack &&
9df4a607	322	git show-index <empty.idx >actual &&
d3c6751b	323	test_must_be_empty actual
9df4a607 JK	324	'
	325
	326	test_expect_success 'pack reuse respects --incremental' '
	327	reusable_pack --incremental >empty.pack &&
	328	git index-pack empty.pack &&
9df4a607	329	git show-index <empty.idx >actual &&
d3c6751b	330	test_must_be_empty actual
9df4a607	331	'
9d2e330b JK	332
	333	test_expect_success 'truncated bitmap fails gracefully' '
	334	git repack -ad &&
	335	git rev-list --use-bitmap-index --count --all >expect &&
	336	bitmap=$(ls .git/objects/pack/*.bitmap) &&
	337	test_when_finished "rm -f $bitmap" &&
2a59a6ef	338	test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
9d2e330b JK	339	mv -f $bitmap.tmp $bitmap &&
	340	git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
	341	test_cmp expect actual &&
	342	test_i18ngrep corrupt stderr
	343	'
	344
c0d61dfc JK	345	# have_delta <obj> <expected_base>
	346	#
	347	# Note that because this relies on cat-file, it might find _any_ copy of an
	348	# object in the repository. The caller is responsible for making sure
	349	# there's only one (e.g., via "repack -ad", or having just fetched a copy).
	350	have_delta () {
	351	echo $2 >expect &&
	352	echo $1 \| git cat-file --batch-check="%(deltabase)" >actual &&
	353	test_cmp expect actual
	354	}
	355
	356	# Create a state of history with these properties:
	357	#
	358	# - refs that allow a client to fetch some new history, while sharing some old
	359	# history with the server; we use branches delta-reuse-old and
	360	# delta-reuse-new here
	361	#
	362	# - the new history contains an object that is stored on the server as a delta
	363	# against a base that is in the old history
	364	#
	365	# - the base object is not immediately reachable from the tip of the old
	366	# history; finding it would involve digging down through history we know the
	367	# other side has
	368	#
	369	# This should result in a state where fetching from old->new would not
	370	# traditionally reuse the on-disk delta (because we'd have to dig to realize
	371	# that the client has it), but we will do so if bitmaps can tell us cheaply
	372	# that the other side has it.
	373	test_expect_success 'set up thin delta-reuse parent' '
	374	# This first commit contains the buried base object.
	375	test-tool genrandom delta 16384 >file &&
	376	git add file &&
	377	git commit -m "delta base" &&
	378	base=$(git rev-parse --verify HEAD:file) &&
	379
	380	# These intermediate commits bury the base back in history.
	381	# This becomes the "old" state.
	382	for i in 1 2 3 4 5
	383	do
	384	echo $i >file &&
	385	git commit -am "intermediate $i" \|\| return 1
	386	done &&
	387	git branch delta-reuse-old &&
	388
	389	# And now our new history has a delta against the buried base. Note
	390	# that this must be smaller than the original file, since pack-objects
	391	# prefers to create deltas from smaller objects to larger.
	392	test-tool genrandom delta 16300 >file &&
	393	git commit -am "delta result" &&
	394	delta=$(git rev-parse --verify HEAD:file) &&
	395	git branch delta-reuse-new &&
	396
	397	# Repack with bitmaps and double check that we have the expected delta
	398	# relationship.
	399	git repack -adb &&
	400	have_delta $delta $base
	401	'
	402
	403	# Now we can sanity-check the non-bitmap behavior (that the server is not able
	404	# to reuse the delta). This isn't strictly something we care about, so this
	405	# test could be scrapped in the future. But it makes sure that the next test is
	406	# actually triggering the feature we want.
	407	#
	408	# Note that our tools for working with on-the-wire "thin" packs are limited. So
409	# we actually perform the fetch, retain the resulting pack, and inspect the
410	# result.
411	test_expect_success 'fetch without bitmaps ignores delta against old base' '
412	test_config pack.usebitmaps false &&
413	test_when_finished "rm -rf client.git" &&
414	git init --bare client.git &&
415	(
416	cd client.git &&
417	git config transfer.unpackLimit 1 &&
418	git fetch .. delta-reuse-old:delta-reuse-old &&
419	git fetch .. delta-reuse-new:delta-reuse-new &&
420	have_delta $delta $ZERO_OID
421	)
422	'
423
424	# And do the same for the bitmap case, where we do expect to find the delta.
425	test_expect_success 'fetch with bitmaps can reuse old base' '
426	test_config pack.usebitmaps true &&
427	test_when_finished "rm -rf client.git" &&
428	git init --bare client.git &&
429	(
430	cd client.git &&
431	git config transfer.unpackLimit 1 &&
432	git fetch .. delta-reuse-old:delta-reuse-old &&
433	git fetch .. delta-reuse-new:delta-reuse-new &&
434	have_delta $delta $base
435	)
436	'
437
212f2ffb	438	test_done