From: Abhradeep Chakraborty <chakrabortyabhradeep79@xxxxxxxxx>
Teach Git to provide a way for users to enable/disable bitmap lookup
table extension by providing a config option named 'writeBitmapLookupTable'.
Default is false.
Also add test to verify writting of lookup table.
Mentored-by: Taylor Blau <me@xxxxxxxxxxxx>
Co-Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@xxxxxxxxx>
Co-Authored-by: Taylor Blau <me@xxxxxxxxxxxx>
Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@xxxxxxxxx>
---
Documentation/config/pack.txt | 7 +
builtin/multi-pack-index.c | 7 +
builtin/pack-objects.c | 8 +
midx.c | 3 +
midx.h | 1 +
t/t5310-pack-bitmaps.sh | 792 ++++++++++++++++--------------
t/t5311-pack-bitmaps-shallow.sh | 53 +-
t/t5326-multi-pack-bitmaps.sh | 421 +++++++++-------
t/t5327-multi-pack-bitmaps-rev.sh | 9 +
9 files changed, 720 insertions(+), 581 deletions(-)
diff --git a/Documentation/config/pack.txt b/Documentation/config/pack.txt
index ad7f73a1ead..b955ca572ec 100644
--- a/Documentation/config/pack.txt
+++ b/Documentation/config/pack.txt
@@ -164,6 +164,13 @@ When writing a multi-pack reachability bitmap, no new namehashes are
computed; instead, any namehashes stored in an existing bitmap are
permuted into their appropriate location when writing a new bitmap.
+pack.writeBitmapLookupTable::
+ When true, Git will include a "lookup table" section in the
+ bitmap index (if one is written). This table is used to defer
+ loading individual bitmaps as late as possible. This can be
+ beneficial in repositories that have relatively large bitmap
+ indexes. Defaults to false.
+
pack.writeReverseIndex::
When true, git will write a corresponding .rev file (see:
link:../technical/pack-format.html[Documentation/technical/pack-format.txt])
diff --git a/builtin/multi-pack-index.c b/builtin/multi-pack-index.c
index 5edbb7fe86e..55402b46f41 100644
--- a/builtin/multi-pack-index.c
+++ b/builtin/multi-pack-index.c
@@ -87,6 +87,13 @@ static int git_multi_pack_index_write_config(const char *var, const char *value,
opts.flags &= ~MIDX_WRITE_BITMAP_HASH_CACHE;
}
+ if (!strcmp(var, "pack.writebitmaplookuptable")) {
+ if (git_config_bool(var, value))
+ opts.flags |= MIDX_WRITE_BITMAP_LOOKUP_TABLE;
+ else
+ opts.flags &= ~MIDX_WRITE_BITMAP_LOOKUP_TABLE;
+ }
+
/*
* We should never make a fall-back call to 'git_default_config', since
* this was already called in 'cmd_multi_pack_index()'.
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 39e28cfcafc..46e26774963 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -3148,6 +3148,14 @@ static int git_pack_config(const char *k, const char *v, void *cb)
else
write_bitmap_options &= ~BITMAP_OPT_HASH_CACHE;
}
+
+ if (!strcmp(k, "pack.writebitmaplookuptable")) {
+ if (git_config_bool(k, v))
+ write_bitmap_options |= BITMAP_OPT_LOOKUP_TABLE;
+ else
+ write_bitmap_options &= ~BITMAP_OPT_LOOKUP_TABLE;
+ }
+
if (!strcmp(k, "pack.usebitmaps")) {
use_bitmap_index_default = git_config_bool(k, v);
return 0;
diff --git a/midx.c b/midx.c
index 5f0dd386b02..9c26d04bfde 100644
--- a/midx.c
+++ b/midx.c
@@ -1072,6 +1072,9 @@ static int write_midx_bitmap(char *midx_name, unsigned char *midx_hash,
if (flags & MIDX_WRITE_BITMAP_HASH_CACHE)
options |= BITMAP_OPT_HASH_CACHE;
+ if (flags & MIDX_WRITE_BITMAP_LOOKUP_TABLE)
+ options |= BITMAP_OPT_LOOKUP_TABLE;
+
prepare_midx_packing_data(&pdata, ctx);
commits = find_commits_for_midx_bitmap(&commits_nr, refs_snapshot, ctx);
diff --git a/midx.h b/midx.h
index 22e8e53288e..5578cd7b835 100644
--- a/midx.h
+++ b/midx.h
@@ -47,6 +47,7 @@ struct multi_pack_index {
#define MIDX_WRITE_REV_INDEX (1 << 1)
#define MIDX_WRITE_BITMAP (1 << 2)
#define MIDX_WRITE_BITMAP_HASH_CACHE (1 << 3)
+#define MIDX_WRITE_BITMAP_LOOKUP_TABLE (1 << 4)
const unsigned char *get_midx_checksum(struct multi_pack_index *m);
void get_midx_filename(struct strbuf *out, const char *object_dir);
diff --git a/t/t5310-pack-bitmaps.sh b/t/t5310-pack-bitmaps.sh
index f775fc1ce69..c0607172827 100755
--- a/t/t5310-pack-bitmaps.sh
+++ b/t/t5310-pack-bitmaps.sh
@@ -26,22 +26,413 @@ has_any () {
grep -Ff "$1" "$2"
}
-setup_bitmap_history
-
-test_expect_success 'setup writing bitmaps during repack' '
- git config repack.writeBitmaps true
-'
-
-test_expect_success 'full repack creates bitmaps' '
- GIT_TRACE2_EVENT="$(pwd)/trace" \
+test_bitmap_cases () {
+ writeLookupTable=false
+ for i in "$@"
+ do
+ case "$i" in
+ "pack.writeBitmapLookupTable") writeLookupTable=true;;
+ esac
+ done
+
+ test_expect_success 'setup test repository' '
+ rm -fr * .git &&
+ git init &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"'
+ '
+ setup_bitmap_history
+
+ test_expect_success 'setup writing bitmaps during repack' '
+ git config repack.writeBitmaps true
+ '
+
+ test_expect_success 'full repack creates bitmaps' '
+ GIT_TRACE2_EVENT="$(pwd)/trace" \
+ git repack -ad &&
+ ls .git/objects/pack/ | grep bitmap >output &&
+ test_line_count = 1 output &&
+ grep "\"key\":\"num_selected_commits\",\"value\":\"106\"" trace &&
+ grep "\"key\":\"num_maximal_commits\",\"value\":\"107\"" trace
+ '
+
+ basic_bitmap_tests
+
+ 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 &&
- grep "\"key\":\"num_selected_commits\",\"value\":\"106\"" trace &&
- grep "\"key\":\"num_maximal_commits\",\"value\":\"107\"" trace
-'
+ 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 second:second &&
+ 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 $parent) &&
+ git pack-objects --stdout --revs <revs >/dev/null
+ '
+
+ test_expect_success JGIT,SHA1 'we can read jgit bitmaps' '
+ git clone --bare . compat-jgit.git &&
+ (
+ cd compat-jgit.git &&
+ rm -f objects/pack/*.bitmap &&
+ jgit gc &&
+ git rev-list --test-bitmap HEAD
+ )
+ '
+
+ test_expect_success JGIT,SHA1 'jgit can read our bitmaps' '
+ git clone --bare . compat-us.git &&
+ (
+ cd compat-us.git &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
+ 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
+ >${i%.pack}.keep || return 1
+ done &&
+ reusable_pack --honor-pack-keep >empty.pack &&
+ git index-pack empty.pack &&
+ git show-index <empty.idx >actual &&
+ test_must_be_empty actual
+ '
+
+ test_expect_success 'pack reuse respects --local' '
+ mv .git/objects/pack/* alt.git/objects/pack/ &&
+ test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
+ reusable_pack --local >empty.pack &&
+ git index-pack empty.pack &&
+ git show-index <empty.idx >actual &&
+ test_must_be_empty actual
+ '
+
+ test_expect_success 'pack reuse respects --incremental' '
+ reusable_pack --incremental >empty.pack &&
+ git index-pack empty.pack &&
+ git show-index <empty.idx >actual &&
+ test_must_be_empty actual
+ '
+
+ test_expect_success 'truncated bitmap fails gracefully (ewah)' '
+ test_config pack.writebitmaphashcache false &&
+ git repack -ad &&
+ git rev-list --use-bitmap-index --count --all >expect &&
+ bitmap=$(ls .git/objects/pack/*.bitmap) &&
+ test_when_finished "rm -f $bitmap" &&
+ test_copy_bytes 256 <$bitmap >$bitmap.tmp &&
+ mv -f $bitmap.tmp $bitmap &&
+ git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
+ test_cmp expect actual &&
+ test_i18ngrep corrupt.ewah.bitmap stderr
+ '
+
+ test_expect_success 'truncated bitmap fails gracefully (cache)' '
+ git repack -ad &&
+ git rev-list --use-bitmap-index --count --all >expect &&
+ bitmap=$(ls .git/objects/pack/*.bitmap) &&
+ test_when_finished "rm -f $bitmap" &&
+ test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
+ mv -f $bitmap.tmp $bitmap &&
+ git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
+ test_cmp expect actual &&
+ test_i18ngrep corrupted.bitmap.index stderr
+ '
+
+ # Create a state of history with these properties:
+ #
+ # - refs that allow a client to fetch some new history, while sharing some old
+ # history with the server; we use branches delta-reuse-old and
+ # delta-reuse-new here
+ #
+ # - the new history contains an object that is stored on the server as a delta
+ # against a base that is in the old history
+ #
+ # - the base object is not immediately reachable from the tip of the old
+ # history; finding it would involve digging down through history we know the
+ # other side has
+ #
+ # This should result in a state where fetching from old->new would not
+ # traditionally reuse the on-disk delta (because we'd have to dig to realize
+ # that the client has it), but we will do so if bitmaps can tell us cheaply
+ # that the other side has it.
+ test_expect_success 'set up thin delta-reuse parent' '
+ # This first commit contains the buried base object.
+ test-tool genrandom delta 16384 >file &&
+ git add file &&
+ git commit -m "delta base" &&
+ base=$(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 $base
+ )
+ '
+
+ test_expect_success 'pack.preferBitmapTips' '
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
+
+ # create enough commits that not all are receive bitmap
+ # coverage even if they are all at the tip of some reference.
+ test_commit_bulk --message="%s" 103 &&
+
+ git rev-list HEAD >commits.raw &&
+ sort <commits.raw >commits &&
+
+ git log --format="create refs/tags/%s %H" HEAD >refs &&
+ git update-ref --stdin <refs &&
+
+ git repack -adb &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+
+ # remember which commits did not receive bitmaps
+ comm -13 bitmaps commits >before &&
+ test_file_not_empty before &&
+
+ # mark the commits which did not receive bitmaps as preferred,
+ # and generate the bitmap again
+ perl -pe "s{^}{create refs/tags/include/$. }" <before |
+ git update-ref --stdin &&
+ git -c pack.preferBitmapTips=refs/tags/include repack -adb &&
+
+ # finally, check that the commit(s) without bitmap coverage
+ # are not the same ones as before
+ test-tool bitmap list-commits | sort >bitmaps &&
+ comm -13 bitmaps commits >after &&
+
+ ! test_cmp before after
+ )
+ '
+
+ test_expect_success 'complains about multiple pack bitmaps' '
+ rm -fr repo &&
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
+
+ test_commit base &&
+
+ git repack -adb &&
+ bitmap="$(ls .git/objects/pack/pack-*.bitmap)" &&
+ mv "$bitmap" "$bitmap.bak" &&
+
+ test_commit other &&
+ git repack -ab &&
+
+ mv "$bitmap.bak" "$bitmap" &&
+
+ find .git/objects/pack -type f -name "*.pack" >packs &&
+ find .git/objects/pack -type f -name "*.bitmap" >bitmaps &&
+ test_line_count = 2 packs &&
+ test_line_count = 2 bitmaps &&
+
+ git rev-list --use-bitmap-index HEAD 2>err &&
+ grep "ignoring extra bitmap file" err
+ )
+ '
+}
-basic_bitmap_tests
+test_bitmap_cases
test_expect_success 'incremental repack fails when bitmaps are requested' '
test_commit more-1 &&
@@ -54,375 +445,12 @@ test_expect_success 'incremental repack can disable bitmaps' '
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 second:second &&
- 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_bitmap_cases "pack.writeBitmapLookupTable"
-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,SHA1 '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,SHA1 '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
- >${i%.pack}.keep || return 1
- done &&
- reusable_pack --honor-pack-keep >empty.pack &&
- git index-pack empty.pack &&
- git show-index <empty.idx >actual &&
- test_must_be_empty actual
-'
-
-test_expect_success 'pack reuse respects --local' '
- mv .git/objects/pack/* alt.git/objects/pack/ &&
- test_when_finished "mv alt.git/objects/pack/* .git/objects/pack/" &&
- reusable_pack --local >empty.pack &&
- git index-pack empty.pack &&
- git show-index <empty.idx >actual &&
- test_must_be_empty actual
-'
-
-test_expect_success 'pack reuse respects --incremental' '
- reusable_pack --incremental >empty.pack &&
- git index-pack empty.pack &&
- git show-index <empty.idx >actual &&
- test_must_be_empty actual
-'
-
-test_expect_success 'truncated bitmap fails gracefully (ewah)' '
- test_config pack.writebitmaphashcache false &&
- git repack -ad &&
- git rev-list --use-bitmap-index --count --all >expect &&
- bitmap=$(ls .git/objects/pack/*.bitmap) &&
- test_when_finished "rm -f $bitmap" &&
- test_copy_bytes 256 <$bitmap >$bitmap.tmp &&
- mv -f $bitmap.tmp $bitmap &&
- git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
- test_cmp expect actual &&
- test_i18ngrep corrupt.ewah.bitmap stderr
-'
-
-test_expect_success 'truncated bitmap fails gracefully (cache)' '
- git repack -ad &&
- git rev-list --use-bitmap-index --count --all >expect &&
- bitmap=$(ls .git/objects/pack/*.bitmap) &&
- test_when_finished "rm -f $bitmap" &&
- test_copy_bytes 512 <$bitmap >$bitmap.tmp &&
- mv -f $bitmap.tmp $bitmap &&
- git rev-list --use-bitmap-index --count --all >actual 2>stderr &&
- test_cmp expect actual &&
- test_i18ngrep corrupted.bitmap.index stderr
-'
-
-# Create a state of history with these properties:
-#
-# - refs that allow a client to fetch some new history, while sharing some old
-# history with the server; we use branches delta-reuse-old and
-# delta-reuse-new here
-#
-# - the new history contains an object that is stored on the server as a delta
-# against a base that is in the old history
-#
-# - the base object is not immediately reachable from the tip of the old
-# history; finding it would involve digging down through history we know the
-# other side has
-#
-# This should result in a state where fetching from old->new would not
-# traditionally reuse the on-disk delta (because we'd have to dig to realize
-# that the client has it), but we will do so if bitmaps can tell us cheaply
-# that the other side has it.
-test_expect_success 'set up thin delta-reuse parent' '
- # This first commit contains the buried base object.
- test-tool genrandom delta 16384 >file &&
- git add file &&
- git commit -m "delta base" &&
- base=$(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 $base
- )
-'
-
-test_expect_success 'pack.preferBitmapTips' '
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
-
- # create enough commits that not all are receive bitmap
- # coverage even if they are all at the tip of some reference.
- test_commit_bulk --message="%s" 103 &&
-
- git rev-list HEAD >commits.raw &&
- sort <commits.raw >commits &&
-
- git log --format="create refs/tags/%s %H" HEAD >refs &&
- git update-ref --stdin <refs &&
-
- git repack -adb &&
- test-tool bitmap list-commits | sort >bitmaps &&
-
- # remember which commits did not receive bitmaps
- comm -13 bitmaps commits >before &&
- test_file_not_empty before &&
-
- # mark the commits which did not receive bitmaps as preferred,
- # and generate the bitmap again
- perl -pe "s{^}{create refs/tags/include/$. }" <before |
- git update-ref --stdin &&
- git -c pack.preferBitmapTips=refs/tags/include repack -adb &&
-
- # finally, check that the commit(s) without bitmap coverage
- # are not the same ones as before
- test-tool bitmap list-commits | sort >bitmaps &&
- comm -13 bitmaps commits >after &&
-
- ! test_cmp before after
- )
-'
-
-test_expect_success 'complains about multiple pack bitmaps' '
- rm -fr repo &&
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
-
- test_commit base &&
-
- git repack -adb &&
- bitmap="$(ls .git/objects/pack/pack-*.bitmap)" &&
- mv "$bitmap" "$bitmap.bak" &&
-
- test_commit other &&
- git repack -ab &&
-
- mv "$bitmap.bak" "$bitmap" &&
-
- find .git/objects/pack -type f -name "*.pack" >packs &&
- find .git/objects/pack -type f -name "*.bitmap" >bitmaps &&
- test_line_count = 2 packs &&
- test_line_count = 2 bitmaps &&
-
- git rev-list --use-bitmap-index HEAD 2>err &&
- grep "ignoring extra bitmap file" err
- )
+test_expect_success 'verify writing bitmap lookup table when enabled' '
+ GIT_TRACE2_EVENT="$(pwd)/trace2" \
+ git repack -ad &&
+ grep "\"label\":\"writing_lookup_table\"" trace2
'
test_done
diff --git a/t/t5311-pack-bitmaps-shallow.sh b/t/t5311-pack-bitmaps-shallow.sh
index 872a95df338..f74c6a2da47 100755
--- a/t/t5311-pack-bitmaps-shallow.sh
+++ b/t/t5311-pack-bitmaps-shallow.sh
@@ -17,23 +17,40 @@ test_description='check bitmap operation with shallow repositories'
# the tree for A. But in a shallow one, we've grafted away
# A, and fetching A to B requires that the other side send
# us the tree for file=1.
-test_expect_success 'setup shallow repo' '
- echo 1 >file &&
- git add file &&
- git commit -m orig &&
- echo 2 >file &&
- git commit -a -m update &&
- git clone --no-local --bare --depth=1 . shallow.git &&
- echo 1 >file &&
- git commit -a -m repeat
-'
-
-test_expect_success 'turn on bitmaps in the parent' '
- git repack -adb
-'
-
-test_expect_success 'shallow fetch from bitmapped repo' '
- (cd shallow.git && git fetch)
-'
+test_shallow_bitmaps () {
+ writeLookupTable=false
+
+ for i in "$@"
+ do
+ case $i in
+ "pack.writeBitmapLookupTable") writeLookupTable=true;;
+ esac
+ done
+
+ test_expect_success 'setup shallow repo' '
+ rm -rf * .git &&
+ git init &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
+ echo 1 >file &&
+ git add file &&
+ git commit -m orig &&
+ echo 2 >file &&
+ git commit -a -m update &&
+ git clone --no-local --bare --depth=1 . shallow.git &&
+ echo 1 >file &&
+ git commit -a -m repeat
+ '
+
+ test_expect_success 'turn on bitmaps in the parent' '
+ git repack -adb
+ '
+
+ test_expect_success 'shallow fetch from bitmapped repo' '
+ (cd shallow.git && git fetch)
+ '
+}
+
+test_shallow_bitmaps
+
test_done
diff --git a/t/t5326-multi-pack-bitmaps.sh b/t/t5326-multi-pack-bitmaps.sh
index 4fe57414c13..3b206adcee6 100755
--- a/t/t5326-multi-pack-bitmaps.sh
+++ b/t/t5326-multi-pack-bitmaps.sh
@@ -15,17 +15,24 @@ GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=0
sane_unset GIT_TEST_MIDX_WRITE_REV
sane_unset GIT_TEST_MIDX_READ_RIDX
-midx_bitmap_core
-
bitmap_reuse_tests() {
from=$1
to=$2
+ writeLookupTable=false
+
+ for i in $3-${$#}
+ do
+ case $i in
+ "pack.writeBitmapLookupTable") writeLookupTable=true;;
+ esac
+ done
test_expect_success "setup pack reuse tests ($from -> $to)" '
rm -fr repo &&
git init repo &&
(
cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
test_commit_bulk 16 &&
git tag old-tip &&
@@ -43,6 +50,7 @@ bitmap_reuse_tests() {
test_expect_success "build bitmap from existing ($from -> $to)" '
(
cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
test_commit_bulk --id=further 16 &&
git tag new-tip &&
@@ -59,6 +67,7 @@ bitmap_reuse_tests() {
test_expect_success "verify resulting bitmaps ($from -> $to)" '
(
cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
git for-each-ref &&
git rev-list --test-bitmap refs/tags/old-tip &&
git rev-list --test-bitmap refs/tags/new-tip
@@ -66,244 +75,294 @@ bitmap_reuse_tests() {
'
}
-bitmap_reuse_tests 'pack' 'MIDX'
-bitmap_reuse_tests 'MIDX' 'pack'
-bitmap_reuse_tests 'MIDX' 'MIDX'
+test_midx_bitmap_cases () {
+ writeLookupTable=false
+ writeBitmapLookupTable=
+
+ for i in "$@"
+ do
+ case $i in
+ "pack.writeBitmapLookupTable")
+ writeLookupTable=true
+ writeBitmapLookupTable="$i"
+ ;;
+ esac
+ done
+
+ test_expect_success 'setup test_repository' '
+ rm -rf * .git &&
+ git init &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"'
+ '
-test_expect_success 'missing object closure fails gracefully' '
- rm -fr repo &&
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
+ midx_bitmap_core
- test_commit loose &&
- test_commit packed &&
+ bitmap_reuse_tests 'pack' 'MIDX' "$writeBitmapLookupTable"
+ bitmap_reuse_tests 'MIDX' 'pack' "$writeBitmapLookupTable"
+ bitmap_reuse_tests 'MIDX' 'MIDX' "$writeBitmapLookupTable"
- # Do not pass "--revs"; we want a pack without the "loose"
- # commit.
- git pack-objects $objdir/pack/pack <<-EOF &&
- $(git rev-parse packed)
- EOF
+ test_expect_success 'missing object closure fails gracefully' '
+ rm -fr repo &&
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
- test_must_fail git multi-pack-index write --bitmap 2>err &&
- grep "doesn.t have full closure" err &&
- test_path_is_missing $midx
- )
-'
+ test_commit loose &&
+ test_commit packed &&
-midx_bitmap_partial_tests
+ # Do not pass "--revs"; we want a pack without the "loose"
+ # commit.
+ git pack-objects $objdir/pack/pack <<-EOF &&
+ $(git rev-parse packed)
+ EOF
-test_expect_success 'removing a MIDX clears stale bitmaps' '
- rm -fr repo &&
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
- test_commit base &&
- git repack &&
- git multi-pack-index write --bitmap &&
+ test_must_fail git multi-pack-index write --bitmap 2>err &&
+ grep "doesn.t have full closure" err &&
+ test_path_is_missing $midx
+ )
+ '
- # Write a MIDX and bitmap; remove the MIDX but leave the bitmap.
- stale_bitmap=$midx-$(midx_checksum $objdir).bitmap &&
- rm $midx &&
+ midx_bitmap_partial_tests
- # Then write a new MIDX.
- test_commit new &&
- git repack &&
- git multi-pack-index write --bitmap &&
+ test_expect_success 'removing a MIDX clears stale bitmaps' '
+ rm -fr repo &&
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
+ test_commit base &&
+ git repack &&
+ git multi-pack-index write --bitmap &&
+
+ # Write a MIDX and bitmap; remove the MIDX but leave the bitmap.
+ stale_bitmap=$midx-$(midx_checksum $objdir).bitmap &&
+ rm $midx &&
+
+ # Then write a new MIDX.
+ test_commit new &&
+ git repack &&
+ git multi-pack-index write --bitmap &&
+
+ test_path_is_file $midx &&
+ test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
+ test_path_is_missing $stale_bitmap
+ )
+ '
- test_path_is_file $midx &&
- test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
- test_path_is_missing $stale_bitmap
- )
-'
+ test_expect_success 'pack.preferBitmapTips' '
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
-test_expect_success 'pack.preferBitmapTips' '
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
+ test_commit_bulk --message="%s" 103 &&
- test_commit_bulk --message="%s" 103 &&
+ git log --format="%H" >commits.raw &&
+ sort <commits.raw >commits &&
- git log --format="%H" >commits.raw &&
- sort <commits.raw >commits &&
+ git log --format="create refs/tags/%s %H" HEAD >refs &&
+ git update-ref --stdin <refs &&
- git log --format="create refs/tags/%s %H" HEAD >refs &&
- git update-ref --stdin <refs &&
+ git multi-pack-index write --bitmap &&
+ test_path_is_file $midx &&
+ test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
- git multi-pack-index write --bitmap &&
- test_path_is_file $midx &&
- test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+ comm -13 bitmaps commits >before &&
+ test_line_count = 1 before &&
- test-tool bitmap list-commits | sort >bitmaps &&
- comm -13 bitmaps commits >before &&
- test_line_count = 1 before &&
+ perl -ne "printf(\"create refs/tags/include/%d \", $.); print" \
+ <before | git update-ref --stdin &&
- perl -ne "printf(\"create refs/tags/include/%d \", $.); print" \
- <before | git update-ref --stdin &&
+ rm -fr $midx-$(midx_checksum $objdir).bitmap &&
+ rm -fr $midx &&
- rm -fr $midx-$(midx_checksum $objdir).bitmap &&
- rm -fr $midx &&
+ git -c pack.preferBitmapTips=refs/tags/include \
+ multi-pack-index write --bitmap &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+ comm -13 bitmaps commits >after &&
- git -c pack.preferBitmapTips=refs/tags/include \
- multi-pack-index write --bitmap &&
- test-tool bitmap list-commits | sort >bitmaps &&
- comm -13 bitmaps commits >after &&
+ ! test_cmp before after
+ )
+ '
- ! test_cmp before after
- )
-'
+ test_expect_success 'writing a bitmap with --refs-snapshot' '
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
-test_expect_success 'writing a bitmap with --refs-snapshot' '
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
+ test_commit one &&
+ test_commit two &&
- test_commit one &&
- test_commit two &&
+ git rev-parse one >snapshot &&
- git rev-parse one >snapshot &&
+ git repack -ad &&
- git repack -ad &&
+ # First, write a MIDX which see both refs/tags/one and
+ # refs/tags/two (causing both of those commits to receive
+ # bitmaps).
+ git multi-pack-index write --bitmap &&
- # First, write a MIDX which see both refs/tags/one and
- # refs/tags/two (causing both of those commits to receive
- # bitmaps).
- git multi-pack-index write --bitmap &&
+ test_path_is_file $midx &&
+ test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
- test_path_is_file $midx &&
- test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+ grep "$(git rev-parse one)" bitmaps &&
+ grep "$(git rev-parse two)" bitmaps &&
- test-tool bitmap list-commits | sort >bitmaps &&
- grep "$(git rev-parse one)" bitmaps &&
- grep "$(git rev-parse two)" bitmaps &&
+ rm -fr $midx-$(midx_checksum $objdir).bitmap &&
+ rm -fr $midx &&
- rm -fr $midx-$(midx_checksum $objdir).bitmap &&
- rm -fr $midx &&
+ # Then again, but with a refs snapshot which only sees
+ # refs/tags/one.
+ git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
- # Then again, but with a refs snapshot which only sees
- # refs/tags/one.
- git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
+ test_path_is_file $midx &&
+ test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
- test_path_is_file $midx &&
- test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+ grep "$(git rev-parse one)" bitmaps &&
+ ! grep "$(git rev-parse two)" bitmaps
+ )
+ '
- test-tool bitmap list-commits | sort >bitmaps &&
- grep "$(git rev-parse one)" bitmaps &&
- ! grep "$(git rev-parse two)" bitmaps
- )
-'
+ test_expect_success 'write a bitmap with --refs-snapshot (preferred tips)' '
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
-test_expect_success 'write a bitmap with --refs-snapshot (preferred tips)' '
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
+ test_commit_bulk --message="%s" 103 &&
- test_commit_bulk --message="%s" 103 &&
+ git log --format="%H" >commits.raw &&
+ sort <commits.raw >commits &&
- git log --format="%H" >commits.raw &&
- sort <commits.raw >commits &&
+ git log --format="create refs/tags/%s %H" HEAD >refs &&
+ git update-ref --stdin <refs &&
- git log --format="create refs/tags/%s %H" HEAD >refs &&
- git update-ref --stdin <refs &&
+ git multi-pack-index write --bitmap &&
+ test_path_is_file $midx &&
+ test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
- git multi-pack-index write --bitmap &&
- test_path_is_file $midx &&
- test_path_is_file $midx-$(midx_checksum $objdir).bitmap &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+ comm -13 bitmaps commits >before &&
+ test_line_count = 1 before &&
- test-tool bitmap list-commits | sort >bitmaps &&
- comm -13 bitmaps commits >before &&
- test_line_count = 1 before &&
+ (
+ grep -vf before commits.raw &&
+ # mark missing commits as preferred
+ sed "s/^/+/" before
+ ) >snapshot &&
+ rm -fr $midx-$(midx_checksum $objdir).bitmap &&
+ rm -fr $midx &&
+
+ git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
+ test-tool bitmap list-commits | sort >bitmaps &&
+ comm -13 bitmaps commits >after &&
+
+ ! test_cmp before after
+ )
+ '
+
+ test_expect_success 'hash-cache values are propagated from pack bitmaps' '
+ rm -fr repo &&
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
(
- grep -vf before commits.raw &&
- # mark missing commits as preferred
- sed "s/^/+/" before
- ) >snapshot &&
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
- rm -fr $midx-$(midx_checksum $objdir).bitmap &&
- rm -fr $midx &&
+ test_commit base &&
+ test_commit base2 &&
+ git repack -adb &&
- git multi-pack-index write --bitmap --refs-snapshot=snapshot &&
- test-tool bitmap list-commits | sort >bitmaps &&
- comm -13 bitmaps commits >after &&
+ test-tool bitmap dump-hashes >pack.raw &&
+ test_file_not_empty pack.raw &&
+ sort pack.raw >pack.hashes &&
- ! test_cmp before after
- )
-'
+ test_commit new &&
+ git repack &&
+ git multi-pack-index write --bitmap &&
-test_expect_success 'hash-cache values are propagated from pack bitmaps' '
- rm -fr repo &&
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
+ test-tool bitmap dump-hashes >midx.raw &&
+ sort midx.raw >midx.hashes &&
- test_commit base &&
- test_commit base2 &&
- git repack -adb &&
+ # ensure that every namehash in the pack bitmap can be found in
+ # the midx bitmap (i.e., that there are no oid-namehash pairs
+ # unique to the pack bitmap).
+ comm -23 pack.hashes midx.hashes >dropped.hashes &&
+ test_must_be_empty dropped.hashes
+ )
+ '
- test-tool bitmap dump-hashes >pack.raw &&
- test_file_not_empty pack.raw &&
- sort pack.raw >pack.hashes &&
+ test_expect_success 'no .bitmap is written without any objects' '
+ rm -fr repo &&
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
- test_commit new &&
- git repack &&
- git multi-pack-index write --bitmap &&
+ empty="$(git pack-objects $objdir/pack/pack </dev/null)" &&
+ cat >packs <<-EOF &&
+ pack-$empty.idx
+ EOF
- test-tool bitmap dump-hashes >midx.raw &&
- sort midx.raw >midx.hashes &&
+ git multi-pack-index write --bitmap --stdin-packs \
+ <packs 2>err &&
- # ensure that every namehash in the pack bitmap can be found in
- # the midx bitmap (i.e., that there are no oid-namehash pairs
- # unique to the pack bitmap).
- comm -23 pack.hashes midx.hashes >dropped.hashes &&
- test_must_be_empty dropped.hashes
- )
-'
+ grep "bitmap without any objects" err &&
-test_expect_success 'no .bitmap is written without any objects' '
- rm -fr repo &&
- git init repo &&
- test_when_finished "rm -fr repo" &&
- (
- cd repo &&
+ test_path_is_file $midx &&
+ test_path_is_missing $midx-$(midx_checksum $objdir).bitmap
+ )
+ '
+
+ test_expect_success 'graceful fallback when missing reverse index' '
+ rm -fr repo &&
+ git init repo &&
+ test_when_finished "rm -fr repo" &&
+ (
+ cd repo &&
+ git config pack.writeBitmapLookupTable '"$writeLookupTable"' &&
- empty="$(git pack-objects $objdir/pack/pack </dev/null)" &&
- cat >packs <<-EOF &&
- pack-$empty.idx
- EOF
+ test_commit base &&
- git multi-pack-index write --bitmap --stdin-packs \
- <packs 2>err &&
+ # write a pack and MIDX bitmap containing base
+ git repack -adb &&
+ git multi-pack-index write --bitmap &&
- grep "bitmap without any objects" err &&
+ GIT_TEST_MIDX_READ_RIDX=0 \
+ git rev-list --use-bitmap-index HEAD 2>err &&
+ ! grep "ignoring extra bitmap file" err
+ )
+ '
+}
- test_path_is_file $midx &&
- test_path_is_missing $midx-$(midx_checksum $objdir).bitmap
- )
-'
+test_midx_bitmap_cases
+
+test_midx_bitmap_cases "pack.writeBitmapLookupTable"
-test_expect_success 'graceful fallback when missing reverse index' '
+test_expect_success 'multi-pack-index write writes lookup table if enabled' '
rm -fr repo &&
git init repo &&
test_when_finished "rm -fr repo" &&
(
cd repo &&
-
test_commit base &&
-
- # write a pack and MIDX bitmap containing base
- git repack -adb &&
- git multi-pack-index write --bitmap &&
-
- GIT_TEST_MIDX_READ_RIDX=0 \
- git rev-list --use-bitmap-index HEAD 2>err &&
- ! grep "ignoring extra bitmap file" err
+ git config pack.writeBitmapLookupTable true &&
+ git repack -ad &&
+ GIT_TRACE2_EVENT="$(pwd)/trace" \
+ git multi-pack-index write --bitmap &&
+ grep "\"label\":\"writing_lookup_table\"" trace
)
'
diff --git a/t/t5327-multi-pack-bitmaps-rev.sh b/t/t5327-multi-pack-bitmaps-rev.sh
index d30ba632c87..d01c61c0c7e 100755
--- a/t/t5327-multi-pack-bitmaps-rev.sh
+++ b/t/t5327-multi-pack-bitmaps-rev.sh
@@ -20,4 +20,13 @@ export GIT_TEST_MIDX_READ_RIDX
midx_bitmap_core rev
midx_bitmap_partial_tests rev
+test_expect_success 'reinitialize the repository with lookup table enabled' '
+ rm -fr * .git &&
+ git init &&
+ git config pack.writeBitmapLookupTable true
+'
+
+midx_bitmap_core rev
+midx_bitmap_partial_tests rev
+
test_done
--
gitgitgadget
