[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 "counting objects via bitmap ($state)" '
		git rev-list --count --objects HEAD >expect &&
		git rev-list --use-bitmap-index --count --objects HEAD >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
608d9c93 JK	77	test_expect_success "counting objects via bitmap ($state)" '
	78	git rev-list --count --objects HEAD >expect &&
	79	git rev-list --use-bitmap-index --count --objects HEAD >actual &&
	80	test_cmp expect actual
	81	'
	82
212f2ffb JK	83	test_expect_success "enumerate --objects ($state)" '
	84	git rev-list --objects --use-bitmap-index HEAD >tmp &&
	85	cut -d" " -f1 <tmp >tmp2 &&
	86	sort <tmp2 >actual &&
	87	git rev-list --objects HEAD >tmp &&
	88	cut -d" " -f1 <tmp >tmp2 &&
	89	sort <tmp2 >expect &&
	90	test_cmp expect actual
	91	'
	92
	93	test_expect_success "bitmap --objects handles non-commit objects ($state)" '
	94	git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
	95	grep $blob actual
	96	'
	97	}
	98
	99	rev_list_tests 'full bitmap'
	100
	101	test_expect_success 'clone from bitmapped repository' '
	102	git clone --no-local --bare . clone.git &&
	103	git rev-parse HEAD >expect &&
	104	git --git-dir=clone.git rev-parse HEAD >actual &&
	105	test_cmp expect actual
	106	'
	107
	108	test_expect_success 'setup further non-bitmapped commits' '
b1c36cb8	109	test_commit_bulk --id=further 10
212f2ffb JK	110	'
	111
	112	rev_list_tests 'partial bitmap'
	113
	114	test_expect_success 'fetch (partial bitmap)' '
	115	git --git-dir=clone.git fetch origin master:master &&
	116	git rev-parse HEAD >expect &&
	117	git --git-dir=clone.git rev-parse HEAD >actual &&
	118	test_cmp expect actual
	119	'
	120
1c409a70	121	test_expect_success 'incremental repack fails when bitmaps are requested' '
212f2ffb	122	test_commit more-1 &&
1c409a70 DT	123	test_must_fail git repack -d 2>err &&
1c409a70 DT	124	test_i18ngrep "Incremental repacks are incompatible with bitmap" err
212f2ffb JK	125	'
	126
	127	test_expect_success 'incremental repack can disable bitmaps' '
	128	test_commit more-2 &&
	129	git repack -d --no-write-bitmap-index
	130	'
	131
702d1b95 KS	132	test_expect_success 'pack-objects respects --local (non-local loose)' '
	133	git init --bare alt.git &&
	134	echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
	135	echo content1 >file1 &&
	136	# non-local loose object which is not present in bitmapped pack
	137	altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
	138	# non-local loose object which is also present in bitmapped pack
	139	git cat-file blob $blob \| GIT_DIR=alt.git git hash-object -w --stdin &&
	140	git add file1 &&
	141	test_tick &&
	142	git commit -m commit_file1 &&
	143	echo HEAD \| git pack-objects --local --stdout --revs >1.pack &&
	144	git index-pack 1.pack &&
	145	list_packed_objects 1.idx >1.objects &&
	146	printf "%s\n" "$altblob" "$blob" >nonlocal-loose &&
	147	! has_any nonlocal-loose 1.objects
	148	'
	149
	150	test_expect_success 'pack-objects respects --honor-pack-keep (local non-bitmapped pack)' '
	151	echo content2 >file2 &&
	152	blob2=$(git hash-object -w file2) &&
	153	git add file2 &&
	154	test_tick &&
	155	git commit -m commit_file2 &&
	156	printf "%s\n" "$blob2" "$bitmaptip" >keepobjects &&
	157	pack2=$(git pack-objects pack2 <keepobjects) &&
	158	mv pack2-$pack2.* .git/objects/pack/ &&
	159	>.git/objects/pack/pack2-$pack2.keep &&
	160	rm $(objpath $blob2) &&
	161	echo HEAD \| git pack-objects --honor-pack-keep --stdout --revs >2a.pack &&
	162	git index-pack 2a.pack &&
	163	list_packed_objects 2a.idx >2a.objects &&
	164	! has_any keepobjects 2a.objects
	165	'
	166
	167	test_expect_success 'pack-objects respects --local (non-local pack)' '
	168	mv .git/objects/pack/pack2-$pack2.* alt.git/objects/pack/ &&
	169	echo HEAD \| git pack-objects --local --stdout --revs >2b.pack &&
	170	git index-pack 2b.pack &&
	171	list_packed_objects 2b.idx >2b.objects &&
	172	! has_any keepobjects 2b.objects
	173	'
	174
	175	test_expect_success 'pack-objects respects --honor-pack-keep (local bitmapped pack)' '
	176	ls .git/objects/pack/ \| grep bitmap >output &&
	177	test_line_count = 1 output &&
	178	packbitmap=$(basename $(cat output) .bitmap) &&
	179	list_packed_objects .git/objects/pack/$packbitmap.idx >packbitmap.objects &&
	180	test_when_finished "rm -f .git/objects/pack/$packbitmap.keep" &&
	181	>.git/objects/pack/$packbitmap.keep &&
	182	echo HEAD \| git pack-objects --honor-pack-keep --stdout --revs >3a.pack &&
	183	git index-pack 3a.pack &&
	184	list_packed_objects 3a.idx >3a.objects &&
	185	! has_any packbitmap.objects 3a.objects
	186	'
	187
	188	test_expect_success 'pack-objects respects --local (non-local bitmapped pack)' '
	189	mv .git/objects/pack/$packbitmap.* alt.git/objects/pack/ &&
0465a505	190	rm -f .git/objects/pack/multi-pack-index &&
702d1b95 KS	191	test_when_finished "mv alt.git/objects/pack/$packbitmap.* .git/objects/pack/" &&
	192	echo HEAD \| git pack-objects --local --stdout --revs >3b.pack &&
	193	git index-pack 3b.pack &&
	194	list_packed_objects 3b.idx >3b.objects &&
	195	! has_any packbitmap.objects 3b.objects
	196	'
	197
645c432d KS	198	test_expect_success 'pack-objects to file can use bitmap' '
	199	# make sure we still have 1 bitmap index from previous tests
	200	ls .git/objects/pack/ \| grep bitmap >output &&
	201	test_line_count = 1 output &&
	202	# verify equivalent packs are generated with/without using bitmap index
	203	packasha1=$(git pack-objects --no-use-bitmap-index --all packa </dev/null) &&
	204	packbsha1=$(git pack-objects --use-bitmap-index --all packb </dev/null) &&
10c60017 SG	205	list_packed_objects packa-$packasha1.idx >packa.objects &&
10c60017 SG	206	list_packed_objects packb-$packbsha1.idx >packb.objects &&
645c432d KS	207	test_cmp packa.objects packb.objects
	208	'
	209
212f2ffb JK	210	test_expect_success 'full repack, reusing previous bitmaps' '
	211	git repack -ad &&
	212	ls .git/objects/pack/ \| grep bitmap >output &&
	213	test_line_count = 1 output
	214	'
	215
	216	test_expect_success 'fetch (full bitmap)' '
	217	git --git-dir=clone.git fetch origin master:master &&
	218	git rev-parse HEAD >expect &&
	219	git --git-dir=clone.git rev-parse HEAD >actual &&
	220	test_cmp expect actual
	221	'
	222
2db1a43f VM	223	test_expect_success 'create objects for missing-HAVE tests' '
	224	blob=$(echo "missing have" \| git hash-object -w --stdin) &&
	225	tree=$(printf "100644 blob $blob\tfile\n" \| git mktree) &&
	226	parent=$(echo parent \| git commit-tree $tree) &&
	227	commit=$(echo commit \| git commit-tree $tree -p $parent) &&
	228	cat >revs <<-EOF
	229	HEAD
	230	^HEAD^
	231	^$commit
	232	EOF
	233	'
	234
702d1b95 KS	235	test_expect_success 'pack-objects respects --incremental' '
	236	cat >revs2 <<-EOF &&
	237	HEAD
	238	$commit
	239	EOF
	240	git pack-objects --incremental --stdout --revs <revs2 >4.pack &&
	241	git index-pack 4.pack &&
	242	list_packed_objects 4.idx >4.objects &&
	243	test_line_count = 4 4.objects &&
	244	git rev-list --objects $commit >revlist &&
	245	cut -d" " -f1 revlist \|sort >objects &&
	246	test_cmp 4.objects objects
	247	'
	248
2db1a43f VM	249	test_expect_success 'pack with missing blob' '
	250	rm $(objpath $blob) &&
	251	git pack-objects --stdout --revs <revs >/dev/null
	252	'
	253
	254	test_expect_success 'pack with missing tree' '
	255	rm $(objpath $tree) &&
	256	git pack-objects --stdout --revs <revs >/dev/null
	257	'
	258
	259	test_expect_success 'pack with missing parent' '
	260	rm $(objpath $parent) &&
	261	git pack-objects --stdout --revs <revs >/dev/null
	262	'
	263
212f2ffb	264	test_expect_success JGIT 'we can read jgit bitmaps' '
87a6bb70	265	git clone --bare . compat-jgit.git &&
212f2ffb	266	(
87a6bb70	267	cd compat-jgit.git &&
90ca1495	268	rm -f objects/pack/*.bitmap &&
212f2ffb JK	269	jgit gc &&
	270	git rev-list --test-bitmap HEAD
	271	)
	272	'
	273
	274	test_expect_success JGIT 'jgit can read our bitmaps' '
87a6bb70	275	git clone --bare . compat-us.git &&
212f2ffb	276	(
87a6bb70	277	cd compat-us.git &&
212f2ffb JK	278	git repack -adb &&
	279	# jgit gc will barf if it does not like our bitmaps
	280	jgit gc
	281	)
	282	'
	283
21134714	284	test_expect_success 'splitting packs does not generate bogus bitmaps' '
c680668d	285	test-tool genrandom foo $((1024 * 1024)) >rand &&
21134714 JK	286	git add rand &&
	287	git commit -m "commit with big file" &&
	288	git -c pack.packSizeLimit=500k repack -adb &&
	289	git init --bare no-bitmaps.git &&
	290	git -C no-bitmaps.git fetch .. HEAD
	291	'
	292
9df4a607 JK	293	test_expect_success 'set up reusable pack' '
	294	rm -f .git/objects/pack/*.keep &&
	295	git repack -adb &&
	296	reusable_pack () {
	297	git for-each-ref --format="%(objectname)" \|
	298	git pack-objects --delta-base-offset --revs --stdout "$@"
	299	}
	300	'
	301
	302	test_expect_success 'pack reuse respects --honor-pack-keep' '
	303	test_when_finished "rm -f .git/objects/pack/*.keep" &&
da5a1f81 JK	304	for i in .git/objects/pack/*.pack
da5a1f81 JK	305	do
9df4a607 JK	306	>${i%.pack}.keep
	307	done &&
	308	reusable_pack --honor-pack-keep >empty.pack &&
	309	git index-pack empty.pack &&
9df4a607	310	git show-index <empty.idx >actual &&
d3c6751b	311	test_must_be_empty actual
9df4a607 JK	312	'
	313
	314	test_expect_success 'pack reuse respects --local' '
	315	mv .git/objects/pack/* alt.git/objects/pack/ &&
	316	test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
	317	reusable_pack --local >empty.pack &&
	318	git index-pack empty.pack &&
9df4a607	319	git show-index <empty.idx >actual &&
d3c6751b	320	test_must_be_empty actual
9df4a607 JK	321	'
	322
	323	test_expect_success 'pack reuse respects --incremental' '
	324	reusable_pack --incremental >empty.pack &&
	325	git index-pack empty.pack &&
9df4a607	326	git show-index <empty.idx >actual &&
d3c6751b	327	test_must_be_empty actual
9df4a607	328	'
9d2e330b JK	329
	330	test_expect_success 'truncated bitmap fails gracefully' '
	331	git repack -ad &&
	332	git rev-list --use-bitmap-index --count --all >expect &&
	333	bitmap=$(ls .git/objects/pack/*.bitmap) &&
	334	test_when_finished "rm -f $bitmap" &&
2a59a6ef	335	test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
9d2e330b JK	336	mv -f $bitmap.tmp $bitmap &&
	337	git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
	338	test_cmp expect actual &&
	339	test_i18ngrep corrupt stderr
	340	'
	341
c0d61dfc JK	342	# have_delta <obj> <expected_base>
	343	#
	344	# Note that because this relies on cat-file, it might find _any_ copy of an
	345	# object in the repository. The caller is responsible for making sure
	346	# there's only one (e.g., via "repack -ad", or having just fetched a copy).
	347	have_delta () {
	348	echo $2 >expect &&
	349	echo $1 \| git cat-file --batch-check="%(deltabase)" >actual &&
	350	test_cmp expect actual
	351	}
	352
	353	# Create a state of history with these properties:
	354	#
	355	# - refs that allow a client to fetch some new history, while sharing some old
	356	# history with the server; we use branches delta-reuse-old and
	357	# delta-reuse-new here
	358	#
	359	# - the new history contains an object that is stored on the server as a delta
	360	# against a base that is in the old history
	361	#
	362	# - the base object is not immediately reachable from the tip of the old
	363	# history; finding it would involve digging down through history we know the
	364	# other side has
	365	#
	366	# This should result in a state where fetching from old->new would not
	367	# traditionally reuse the on-disk delta (because we'd have to dig to realize
	368	# that the client has it), but we will do so if bitmaps can tell us cheaply
	369	# that the other side has it.
	370	test_expect_success 'set up thin delta-reuse parent' '
	371	# This first commit contains the buried base object.
	372	test-tool genrandom delta 16384 >file &&
	373	git add file &&
	374	git commit -m "delta base" &&
	375	base=$(git rev-parse --verify HEAD:file) &&
	376
	377	# These intermediate commits bury the base back in history.
	378	# This becomes the "old" state.
	379	for i in 1 2 3 4 5
	380	do
	381	echo $i >file &&
	382	git commit -am "intermediate $i" \|\| return 1
	383	done &&
	384	git branch delta-reuse-old &&
	385
	386	# And now our new history has a delta against the buried base. Note
	387	# that this must be smaller than the original file, since pack-objects
	388	# prefers to create deltas from smaller objects to larger.
	389	test-tool genrandom delta 16300 >file &&
	390	git commit -am "delta result" &&
	391	delta=$(git rev-parse --verify HEAD:file) &&
	392	git branch delta-reuse-new &&
	393
	394	# Repack with bitmaps and double check that we have the expected delta
	395	# relationship.
	396	git repack -adb &&
	397	have_delta $delta $base
	398	'
	399
	400	# Now we can sanity-check the non-bitmap behavior (that the server is not able
	401	# to reuse the delta). This isn't strictly something we care about, so this
	402	# test could be scrapped in the future. But it makes sure that the next test is
	403	# actually triggering the feature we want.
	404	#
	405	# Note that our tools for working with on-the-wire "thin" packs are limited. So
406	# we actually perform the fetch, retain the resulting pack, and inspect the
407	# result.
408	test_expect_success 'fetch without bitmaps ignores delta against old base' '
409	test_config pack.usebitmaps false &&
410	test_when_finished "rm -rf client.git" &&
411	git init --bare client.git &&
412	(
413	cd client.git &&
414	git config transfer.unpackLimit 1 &&
415	git fetch .. delta-reuse-old:delta-reuse-old &&
416	git fetch .. delta-reuse-new:delta-reuse-new &&
417	have_delta $delta $ZERO_OID
418	)
419	'
420
421	# And do the same for the bitmap case, where we do expect to find the delta.
422	test_expect_success 'fetch with bitmaps can reuse old base' '
423	test_config pack.usebitmaps true &&
424	test_when_finished "rm -rf client.git" &&
425	git init --bare client.git &&
426	(
427	cd client.git &&
428	git config transfer.unpackLimit 1 &&
429	git fetch .. delta-reuse-old:delta-reuse-old &&
430	git fetch .. delta-reuse-new:delta-reuse-new &&
431	have_delta $delta $base
432	)
433	'
434
212f2ffb	435	test_done