[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 commits ($state)" '
		git rev-list --use-bitmap-index HEAD >actual &&
		git rev-list HEAD >expect &&
		test_bitmap_traversal --no-confirm-bitmaps expect actual
	'

	test_expect_success "enumerate --objects ($state)" '
		git rev-list --objects --use-bitmap-index HEAD >actual &&
		git rev-list --objects HEAD >expect &&
		test_bitmap_traversal 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 ($state)" '
	78	git rev-list --count --objects HEAD >expect &&
	79	git rev-list --use-bitmap-index --count --objects HEAD >actual &&
	80	test_cmp expect actual
	81	'
	82
4eb707eb JK	83	test_expect_success "enumerate commits ($state)" '
	84	git rev-list --use-bitmap-index HEAD >actual &&
	85	git rev-list HEAD >expect &&
	86	test_bitmap_traversal --no-confirm-bitmaps expect actual
	87	'
	88
212f2ffb	89	test_expect_success "enumerate --objects ($state)" '
ea047a8e JK	90	git rev-list --objects --use-bitmap-index HEAD >actual &&
	91	git rev-list --objects HEAD >expect &&
	92	test_bitmap_traversal expect actual
212f2ffb JK	93	'
	94
	95	test_expect_success "bitmap --objects handles non-commit objects ($state)" '
	96	git rev-list --objects --use-bitmap-index HEAD tagged-blob >actual &&
	97	grep $blob actual
	98	'
	99	}
	100
	101	rev_list_tests 'full bitmap'
	102
	103	test_expect_success 'clone from bitmapped repository' '
	104	git clone --no-local --bare . clone.git &&
	105	git rev-parse HEAD >expect &&
	106	git --git-dir=clone.git rev-parse HEAD >actual &&
	107	test_cmp expect actual
	108	'
	109
	110	test_expect_success 'setup further non-bitmapped commits' '
b1c36cb8	111	test_commit_bulk --id=further 10
212f2ffb JK	112	'
	113
	114	rev_list_tests 'partial bitmap'
	115
	116	test_expect_success 'fetch (partial bitmap)' '
	117	git --git-dir=clone.git fetch origin master:master &&
	118	git rev-parse HEAD >expect &&
	119	git --git-dir=clone.git rev-parse HEAD >actual &&
	120	test_cmp expect actual
	121	'
	122
1c409a70	123	test_expect_success 'incremental repack fails when bitmaps are requested' '
212f2ffb	124	test_commit more-1 &&
1c409a70 DT	125	test_must_fail git repack -d 2>err &&
1c409a70 DT	126	test_i18ngrep "Incremental repacks are incompatible with bitmap" err
212f2ffb JK	127	'
	128
	129	test_expect_success 'incremental repack can disable bitmaps' '
	130	test_commit more-2 &&
	131	git repack -d --no-write-bitmap-index
	132	'
	133
702d1b95 KS	134	test_expect_success 'pack-objects respects --local (non-local loose)' '
	135	git init --bare alt.git &&
	136	echo $(pwd)/alt.git/objects >.git/objects/info/alternates &&
	137	echo content1 >file1 &&
	138	# non-local loose object which is not present in bitmapped pack
	139	altblob=$(GIT_DIR=alt.git git hash-object -w file1) &&
	140	# non-local loose object which is also present in bitmapped pack
	141	git cat-file blob $blob \| GIT_DIR=alt.git git hash-object -w --stdin &&
	142	git add file1 &&
	143	test_tick &&
	144	git commit -m commit_file1 &&
	145	echo HEAD \| git pack-objects --local --stdout --revs >1.pack &&
	146	git index-pack 1.pack &&
	147	list_packed_objects 1.idx >1.objects &&
	148	printf "%s\n" "$altblob" "$blob" >nonlocal-loose &&
	149	! has_any nonlocal-loose 1.objects
	150	'
	151
	152	test_expect_success 'pack-objects respects --honor-pack-keep (local non-bitmapped pack)' '
	153	echo content2 >file2 &&
	154	blob2=$(git hash-object -w file2) &&
	155	git add file2 &&
	156	test_tick &&
	157	git commit -m commit_file2 &&
	158	printf "%s\n" "$blob2" "$bitmaptip" >keepobjects &&
	159	pack2=$(git pack-objects pack2 <keepobjects) &&
	160	mv pack2-$pack2.* .git/objects/pack/ &&
	161	>.git/objects/pack/pack2-$pack2.keep &&
	162	rm $(objpath $blob2) &&
	163	echo HEAD \| git pack-objects --honor-pack-keep --stdout --revs >2a.pack &&
	164	git index-pack 2a.pack &&
	165	list_packed_objects 2a.idx >2a.objects &&
	166	! has_any keepobjects 2a.objects
	167	'
	168
	169	test_expect_success 'pack-objects respects --local (non-local pack)' '
	170	mv .git/objects/pack/pack2-$pack2.* alt.git/objects/pack/ &&
	171	echo HEAD \| git pack-objects --local --stdout --revs >2b.pack &&
	172	git index-pack 2b.pack &&
	173	list_packed_objects 2b.idx >2b.objects &&
	174	! has_any keepobjects 2b.objects
	175	'
	176
	177	test_expect_success 'pack-objects respects --honor-pack-keep (local bitmapped pack)' '
	178	ls .git/objects/pack/ \| grep bitmap >output &&
	179	test_line_count = 1 output &&
	180	packbitmap=$(basename $(cat output) .bitmap) &&
	181	list_packed_objects .git/objects/pack/$packbitmap.idx >packbitmap.objects &&
	182	test_when_finished "rm -f .git/objects/pack/$packbitmap.keep" &&
	183	>.git/objects/pack/$packbitmap.keep &&
	184	echo HEAD \| git pack-objects --honor-pack-keep --stdout --revs >3a.pack &&
	185	git index-pack 3a.pack &&
	186	list_packed_objects 3a.idx >3a.objects &&
	187	! has_any packbitmap.objects 3a.objects
	188	'
	189
	190	test_expect_success 'pack-objects respects --local (non-local bitmapped pack)' '
	191	mv .git/objects/pack/$packbitmap.* alt.git/objects/pack/ &&
0465a505	192	rm -f .git/objects/pack/multi-pack-index &&
702d1b95 KS	193	test_when_finished "mv alt.git/objects/pack/$packbitmap.* .git/objects/pack/" &&
	194	echo HEAD \| git pack-objects --local --stdout --revs >3b.pack &&
	195	git index-pack 3b.pack &&
	196	list_packed_objects 3b.idx >3b.objects &&
	197	! has_any packbitmap.objects 3b.objects
	198	'
	199
645c432d KS	200	test_expect_success 'pack-objects to file can use bitmap' '
	201	# make sure we still have 1 bitmap index from previous tests
	202	ls .git/objects/pack/ \| grep bitmap >output &&
	203	test_line_count = 1 output &&
	204	# verify equivalent packs are generated with/without using bitmap index
	205	packasha1=$(git pack-objects --no-use-bitmap-index --all packa </dev/null) &&
	206	packbsha1=$(git pack-objects --use-bitmap-index --all packb </dev/null) &&
10c60017 SG	207	list_packed_objects packa-$packasha1.idx >packa.objects &&
10c60017 SG	208	list_packed_objects packb-$packbsha1.idx >packb.objects &&
645c432d KS	209	test_cmp packa.objects packb.objects
	210	'
	211
212f2ffb JK	212	test_expect_success 'full repack, reusing previous bitmaps' '
	213	git repack -ad &&
	214	ls .git/objects/pack/ \| grep bitmap >output &&
	215	test_line_count = 1 output
	216	'
	217
	218	test_expect_success 'fetch (full bitmap)' '
	219	git --git-dir=clone.git fetch origin master:master &&
	220	git rev-parse HEAD >expect &&
	221	git --git-dir=clone.git rev-parse HEAD >actual &&
	222	test_cmp expect actual
	223	'
	224
2db1a43f VM	225	test_expect_success 'create objects for missing-HAVE tests' '
	226	blob=$(echo "missing have" \| git hash-object -w --stdin) &&
	227	tree=$(printf "100644 blob $blob\tfile\n" \| git mktree) &&
	228	parent=$(echo parent \| git commit-tree $tree) &&
	229	commit=$(echo commit \| git commit-tree $tree -p $parent) &&
	230	cat >revs <<-EOF
	231	HEAD
	232	^HEAD^
	233	^$commit
	234	EOF
	235	'
	236
702d1b95 KS	237	test_expect_success 'pack-objects respects --incremental' '
	238	cat >revs2 <<-EOF &&
	239	HEAD
	240	$commit
	241	EOF
	242	git pack-objects --incremental --stdout --revs <revs2 >4.pack &&
	243	git index-pack 4.pack &&
	244	list_packed_objects 4.idx >4.objects &&
	245	test_line_count = 4 4.objects &&
	246	git rev-list --objects $commit >revlist &&
	247	cut -d" " -f1 revlist \|sort >objects &&
	248	test_cmp 4.objects objects
	249	'
	250
2db1a43f VM	251	test_expect_success 'pack with missing blob' '
	252	rm $(objpath $blob) &&
	253	git pack-objects --stdout --revs <revs >/dev/null
	254	'
	255
	256	test_expect_success 'pack with missing tree' '
	257	rm $(objpath $tree) &&
	258	git pack-objects --stdout --revs <revs >/dev/null
	259	'
	260
	261	test_expect_success 'pack with missing parent' '
	262	rm $(objpath $parent) &&
	263	git pack-objects --stdout --revs <revs >/dev/null
	264	'
	265
212f2ffb	266	test_expect_success JGIT 'we can read jgit bitmaps' '
87a6bb70	267	git clone --bare . compat-jgit.git &&
212f2ffb	268	(
87a6bb70	269	cd compat-jgit.git &&
90ca1495	270	rm -f objects/pack/*.bitmap &&
212f2ffb JK	271	jgit gc &&
	272	git rev-list --test-bitmap HEAD
	273	)
	274	'
	275
	276	test_expect_success JGIT 'jgit can read our bitmaps' '
87a6bb70	277	git clone --bare . compat-us.git &&
212f2ffb	278	(
87a6bb70	279	cd compat-us.git &&
212f2ffb JK	280	git repack -adb &&
	281	# jgit gc will barf if it does not like our bitmaps
	282	jgit gc
	283	)
	284	'
	285
21134714	286	test_expect_success 'splitting packs does not generate bogus bitmaps' '
c680668d	287	test-tool genrandom foo $((1024 * 1024)) >rand &&
21134714 JK	288	git add rand &&
	289	git commit -m "commit with big file" &&
	290	git -c pack.packSizeLimit=500k repack -adb &&
	291	git init --bare no-bitmaps.git &&
	292	git -C no-bitmaps.git fetch .. HEAD
	293	'
	294
9df4a607 JK	295	test_expect_success 'set up reusable pack' '
	296	rm -f .git/objects/pack/*.keep &&
	297	git repack -adb &&
	298	reusable_pack () {
	299	git for-each-ref --format="%(objectname)" \|
	300	git pack-objects --delta-base-offset --revs --stdout "$@"
	301	}
	302	'
	303
	304	test_expect_success 'pack reuse respects --honor-pack-keep' '
	305	test_when_finished "rm -f .git/objects/pack/*.keep" &&
da5a1f81 JK	306	for i in .git/objects/pack/*.pack
da5a1f81 JK	307	do
9df4a607 JK	308	>${i%.pack}.keep
	309	done &&
	310	reusable_pack --honor-pack-keep >empty.pack &&
	311	git index-pack empty.pack &&
9df4a607	312	git show-index <empty.idx >actual &&
d3c6751b	313	test_must_be_empty actual
9df4a607 JK	314	'
	315
	316	test_expect_success 'pack reuse respects --local' '
	317	mv .git/objects/pack/* alt.git/objects/pack/ &&
	318	test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
	319	reusable_pack --local >empty.pack &&
	320	git index-pack empty.pack &&
9df4a607	321	git show-index <empty.idx >actual &&
d3c6751b	322	test_must_be_empty actual
9df4a607 JK	323	'
	324
	325	test_expect_success 'pack reuse respects --incremental' '
	326	reusable_pack --incremental >empty.pack &&
	327	git index-pack empty.pack &&
9df4a607	328	git show-index <empty.idx >actual &&
d3c6751b	329	test_must_be_empty actual
9df4a607	330	'
9d2e330b JK	331
	332	test_expect_success 'truncated bitmap fails gracefully' '
	333	git repack -ad &&
	334	git rev-list --use-bitmap-index --count --all >expect &&
	335	bitmap=$(ls .git/objects/pack/*.bitmap) &&
	336	test_when_finished "rm -f $bitmap" &&
2a59a6ef	337	test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
9d2e330b JK	338	mv -f $bitmap.tmp $bitmap &&
	339	git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
	340	test_cmp expect actual &&
	341	test_i18ngrep corrupt stderr
	342	'
	343
c0d61dfc JK	344	# have_delta <obj> <expected_base>
	345	#
	346	# Note that because this relies on cat-file, it might find _any_ copy of an
	347	# object in the repository. The caller is responsible for making sure
	348	# there's only one (e.g., via "repack -ad", or having just fetched a copy).
	349	have_delta () {
	350	echo $2 >expect &&
	351	echo $1 \| git cat-file --batch-check="%(deltabase)" >actual &&
	352	test_cmp expect actual
	353	}
	354
	355	# Create a state of history with these properties:
	356	#
	357	# - refs that allow a client to fetch some new history, while sharing some old
	358	# history with the server; we use branches delta-reuse-old and
	359	# delta-reuse-new here
	360	#
	361	# - the new history contains an object that is stored on the server as a delta
	362	# against a base that is in the old history
	363	#
	364	# - the base object is not immediately reachable from the tip of the old
	365	# history; finding it would involve digging down through history we know the
	366	# other side has
	367	#
	368	# This should result in a state where fetching from old->new would not
	369	# traditionally reuse the on-disk delta (because we'd have to dig to realize
	370	# that the client has it), but we will do so if bitmaps can tell us cheaply
	371	# that the other side has it.
	372	test_expect_success 'set up thin delta-reuse parent' '
	373	# This first commit contains the buried base object.
	374	test-tool genrandom delta 16384 >file &&
	375	git add file &&
	376	git commit -m "delta base" &&
	377	base=$(git rev-parse --verify HEAD:file) &&
	378
	379	# These intermediate commits bury the base back in history.
	380	# This becomes the "old" state.
	381	for i in 1 2 3 4 5
	382	do
	383	echo $i >file &&
	384	git commit -am "intermediate $i" \|\| return 1
	385	done &&
	386	git branch delta-reuse-old &&
	387
	388	# And now our new history has a delta against the buried base. Note
	389	# that this must be smaller than the original file, since pack-objects
	390	# prefers to create deltas from smaller objects to larger.
	391	test-tool genrandom delta 16300 >file &&
	392	git commit -am "delta result" &&
	393	delta=$(git rev-parse --verify HEAD:file) &&
	394	git branch delta-reuse-new &&
	395
	396	# Repack with bitmaps and double check that we have the expected delta
	397	# relationship.
	398	git repack -adb &&
	399	have_delta $delta $base
	400	'
	401
	402	# Now we can sanity-check the non-bitmap behavior (that the server is not able
	403	# to reuse the delta). This isn't strictly something we care about, so this
	404	# test could be scrapped in the future. But it makes sure that the next test is
	405	# actually triggering the feature we want.
	406	#
	407	# Note that our tools for working with on-the-wire "thin" packs are limited. So
408	# we actually perform the fetch, retain the resulting pack, and inspect the
409	# result.
410	test_expect_success 'fetch without bitmaps ignores delta against old base' '
411	test_config pack.usebitmaps false &&
412	test_when_finished "rm -rf client.git" &&
413	git init --bare client.git &&
414	(
415	cd client.git &&
416	git config transfer.unpackLimit 1 &&
417	git fetch .. delta-reuse-old:delta-reuse-old &&
418	git fetch .. delta-reuse-new:delta-reuse-new &&
419	have_delta $delta $ZERO_OID
420	)
421	'
422
423	# And do the same for the bitmap case, where we do expect to find the delta.
424	test_expect_success 'fetch with bitmaps can reuse old base' '
425	test_config pack.usebitmaps true &&
426	test_when_finished "rm -rf client.git" &&
427	git init --bare client.git &&
428	(
429	cd client.git &&
430	git config transfer.unpackLimit 1 &&
431	git fetch .. delta-reuse-old:delta-reuse-old &&
432	git fetch .. delta-reuse-new:delta-reuse-new &&
433	have_delta $delta $base
434	)
435	'
436
212f2ffb	437	test_done