Test suite has been taught not to unnecessarily rely on DNS failing
a bogus external name.
* jk/tests-without-dns:
t/lib-bundle-uri: use local fake bundle URLs
t5551: do not confirm that bogus url cannot be used
t5553: use local url for invalid fetch
An existing test of oidmap API has been rewritten with the
unit-test framework.
* gt/unit-test-oidmap:
t: migrate helper/test-oidmap.c to unit-tests/t-oidmap.c
"git describe --dirty --broken" forgot to refresh the index before
seeing if there is any chang, ("git describe --dirty" correctly did
so), which has been corrected.
* as/describe-broken-refresh-index-fix:
describe: refresh the index when 'broken' flag is used
When bundleURI interface fetches multiple bundles, Git failed to
take full advantage of all bundles and ended up slurping duplicated
objects.
* xx/bundie-uri-fixes:
unbundle: extend object verification for fetches
fetch-pack: expose fsckObjects configuration logic
bundle-uri: verify oid before writing refs
The Bloom filter used for path limited history traversal was broken
on systems whose "char" is unsigned; update the implementation and
bump the format version to 2.
* tb/path-filter-fix:
bloom: introduce `deinit_bloom_filters()`
commit-graph: reuse existing Bloom filters where possible
object.h: fix mis-aligned flag bits table
commit-graph: new Bloom filter version that fixes murmur3
commit-graph: unconditionally load Bloom filters
bloom: prepare to discard incompatible Bloom filters
bloom: annotate filters with hash version
repo-settings: introduce commitgraph.changedPathsVersion
t4216: test changed path filters with high bit paths
t/helper/test-read-graph: implement `bloom-filters` mode
bloom.h: make `load_bloom_filter_from_graph()` public
t/helper/test-read-graph.c: extract `dump_graph_info()`
gitformat-commit-graph: describe version 2 of BDAT
commit-graph: ensure Bloom filters are read with consistent settings
revision.c: consult Bloom filters for root commits
t/t4216-log-bloom.sh: harden `test_bloom_filters_not_used()`
date parser updates to be more careful about underflowing epoch
based timestamp.
* db/date-underflow-fix:
date: detect underflow/overflow when parsing dates with timezone offset
t0006: simplify prerequisites
When GIT_PAGER failed to spawn, depending on the code path taken,
we failed immediately (correct) or just spew the payload to the
standard output (incorrect). The code now always fail immediately
when GIT_PAGER fails.
* rj/pager-die-upon-exec-failure:
pager: die when paging to non-existing command
helper/test-oidmap.c along with t0016-oidmap.sh test the oidmap.h
library which is built on top of hashmap.h.
Migrate them to the unit testing framework for better performance,
concise code and better debugging. Along with the migration also plug
memory leaks and make the test logic independent for all the tests.
The migration removes 'put' tests from t0016, because it is used as
setup to all the other tests, so testing it separately does not yield
any benefit.
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Reviewed-by: Josh Steadmon <steadmon@google.com>
Helped-by: Phillip Wood <phillip.wood123@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Ghanshyam Thakkar <shyamthakkar001@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git diff --no-ext-diff" when diff.external is configured ignored
the "--color-moved" option.
* rs/diff-color-moved-w-no-ext-diff-fix:
diff: allow --color-moved with --no-ext-diff
Memory ownership rules for the in-core representation of
remote.*.url configuration values have been straightened out, which
resulted in a few leak fixes and code clarification.
* jk/remote-wo-url:
remote: drop checks for zero-url case
remote: always require at least one url in a remote
t5801: test remote.*.vcs config
t5801: make remote-testgit GIT_DIR setup more robust
remote: allow resetting url list
config: document remote.*.url/pushurl interaction
remote: simplify url/pushurl selection
remote: use strvecs to store remote url/pushurl
remote: transfer ownership of memory in add_url(), etc
remote: refactor alias_url() memory ownership
archive: fix check for missing url
A CPP macro USE_THE_REPOSITORY_VARIABLE is introduced to help
transition the codebase to rely less on the availability of the
singleton the_repository instance.
* ps/use-the-repository:
hex: guard declarations with `USE_THE_REPOSITORY_VARIABLE`
t/helper: remove dependency on `the_repository` in "proc-receive"
t/helper: fix segfault in "oid-array" command without repository
t/helper: use correct object hash in partial-clone helper
compat/fsmonitor: fix socket path in networked SHA256 repos
replace-object: use hash algorithm from passed-in repository
protocol-caps: use hash algorithm from passed-in repository
oidset: pass hash algorithm when parsing file
http-fetch: don't crash when parsing packfile without a repo
hash-ll: merge with "hash.h"
refs: avoid include cycle with "repository.h"
global: introduce `USE_THE_REPOSITORY_VARIABLE` macro
hash: require hash algorithm in `empty_tree_oid_hex()`
hash: require hash algorithm in `is_empty_{blob,tree}_oid()`
hash: make `is_null_oid()` independent of `the_repository`
hash: convert `oidcmp()` and `oideq()` to compare whole hash
global: ensure that object IDs are always padded
hash: require hash algorithm in `oidread()` and `oidclr()`
hash: require hash algorithm in `hasheq()`, `hashcmp()` and `hashclr()`
hash: drop (mostly) unused `is_empty_{blob,tree}_sha1()` functions
The output from "git cat-file --batch-check" and "--batch-command
(info)" should not be unbuffered, for which some tests have been
added.
* ew/cat-file-unbuffered-tests:
t1006: ensure cat-file info isn't buffered by default
Git.pm: use array in command_bidi_pipe example
A quick test tells us that t0612 does not trigger any leak:
$ make SANITIZE=leak test GIT_TEST_PASSING_SANITIZE_LEAK=check GIT_TEST_SANITIZE_LEAK_LOG=true GIT_TEST_OPTS=-i T=t0612-reftable-jgit-compatibility.sh
[...]
*** t0612-reftable-jgit-compatibility.sh ***
in GIT_TEST_PASSING_SANITIZE_LEAK=check mode, setting --invert-exit-code for TEST_PASSES_SANITIZE_LEAK != true
ok 1 - CGit repository can be read by JGit
ok 2 - JGit repository can be read by CGit
ok 3 - mixed writes from JGit and CGit
ok 4 - JGit can read multi-level index
# passed all 4 test(s)
1..4
# faking up non-zero exit with --invert-exit-code
make[2]: *** [Makefile:75: t0612-reftable-jgit-compatibility.sh] Error 1
Let's mark it as leak-free to silence the machinery activated by
`GIT_TEST_PASSING_SANITIZE_LEAK=check`.
Reported-by: Jeff King <peff@peff.net>
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We can mark t0613 as leak-free:
$ make test SANITIZE=leak GIT_TEST_PASSING_SANITIZE_LEAK=check GIT_TEST_SANITIZE_LEAK_LOG=true T=t0613-reftable-write-options.sh
[...]
*** t0613-reftable-write-options.sh ***
in GIT_TEST_PASSING_SANITIZE_LEAK=check mode, setting --invert-exit-code for TEST_PASSES_SANITIZE_LEAK != true
ok 1 - default write options
ok 2 - disabled reflog writes no log blocks
ok 3 - many refs results in multiple blocks
ok 4 - tiny block size leads to error
ok 5 - small block size leads to multiple ref blocks
ok 6 - small block size fails with large reflog message
ok 7 - block size exceeding maximum supported size
ok 8 - restart interval at every single record
ok 9 - restart interval exceeding maximum supported interval
ok 10 - object index gets written by default with ref index
ok 11 - object index can be disabled
# passed all 11 test(s)
1..11
# faking up non-zero exit with --invert-exit-code
make[2]: *** [Makefile:75: t0613-reftable-write-options.sh] Error 1
Do it.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git fetch-pack -k -k" without passing "--lock-pack" (which we
never do ourselves) did not work at all, which has been corrected.
* jk/fetch-pack-fsck-wo-lock-pack:
fetch-pack: fix segfault when fscking without --lock-pack
A helper function shared between two tests had a copy-paste bug,
which has been corrected.
* jk/t5500-typofix:
t5500: fix mistaken $SERVER reference in helper function
When "git merge" sees that the index cannot be refreshed (e.g. due
to another process doing the same in the background), it died but
after writing MERGE_HEAD etc. files, which was useless for the
purpose to recover from the failure.
* kz/merge-fail-early-upon-refresh-failure:
merge: avoid write merge state when unable to write index
A few of the bundle URI tests point config at a fake bundle; they care
only that the client has been configured with _some_ bundle, but it
doesn't have to actually contain objects.
For the file:// tests, we use "$BUNDLE_URI_REPO_URI/fake.bdl", a
non-existent file inside the actual remote repo. But for git:// and
http:// tests, we use "https://example.com/fake.bdl". This works OK in
practice, but it means we actually make a request to example.com (which
returns a placeholder HTML response). That can be annoying when running
the test suite on a spotty network (it doesn't produce a wrong result,
since we expect it to fail, but it may introduce delays).
We can reduce our dependency on the outside world by using a local URL.
It would work to just do "file://$PWD/fake.bdl" here, since the bundle
code does not care about the actual location. But in the long run I
suspect we may have more restrictions on which protocols can be passed
around as bundle URIs. So instead, let's stick with the file:// repo's
pattern and just point to a bogus name based on the remote repo's URL.
For http this makes perfect sense; we'll make a request to the local
http server and find that there's nothing there. For git:// it's a
little weird, as you wouldn't normally access a bundle file over git://
at all. But it's probably the most reasonable guess we can make for now,
and anybody who tightens protocol selection later will know better
what's the best path forward.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
t5551 tries to access a URL with a bogus hostname and confirms that
http.curloptResolve lets us use this otherwise unresolvable name.
Before doing so, though, we confirm that trying to access the bogus
hostname without http.curloptResolve fails as expected. This isn't
testing Git at all, but is confirming the test's assumptions. That's
often a good thing to do, but in this case it means that we'll actually
try to resolve the external name. Even though it's unlikely that
"gitbogusexamplehost.invalid" would ever resolve, the DNS lookup itself
may take time.
It's probably reasonable to just assume that this obviously-bogus name
would not actually resolve in practice, which lets us reduce our test
suite's dependency on the outside world.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We test how "fetch --set-upstream" behaves when given an invalid URL,
using the bogus URL "http://nosuchdomain.example.com". But finding out
that it is invalid requires an actual DNS lookup.
Reduce our dependency on external factors by using an invalid local
filesystem URL, which works just as well for our purposes.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When describe is run with 'dirty' flag, we refresh the index
to make sure it is in sync with the filesystem before
determining if the working tree is dirty. However, this is
not done for the codepath where the 'broken' flag is used.
This causes `git describe --broken --dirty` to false
positively report the worktree being dirty if a file has
different stat info than what is recorded in the index.
Running `git update-index -q --refresh` to refresh the index
before running diff-index fixes the problem.
Also add tests to deliberately update stat info of a
file before running describe to verify it behaves correctly.
Reported-by: Paul Millar <paul.millar@desy.de>
Suggested-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Abhijeet Sonar <abhijeet.nkt@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Overriding the date of a commit to be close to "1970-01-01 00:00:00"
with a large enough positive timezone for the equivelant GMT time to be
before the epoch is considered valid by `parse_date_basic`. Similar
behaviour occurs when using a date close to "2099-12-31 23:59:59" (the
maximum date allowed by `tm_to_time_t`) with a large enough negative
timezone offset.
This leads to an integer underflow or underflow respectively in the
commit timestamp, which is not caught by `git-commit`, but will cause
other services to fail, such as `git-fsck`, which, for the first case,
reports "badDateOverflow: invalid author/committer line - date causes
integer overflow".
Instead check the timezone offset and fail if the resulting time comes
before the epoch "1970-01-01T00:00:00Z" or after the maximum date
"2099-12-31T23:59:59Z".
Using the REQUIRE_64BIT_TIME prerequisite, make sure that the tests
near the end of Git time (aka end of year 2099) are not attempted on
purely 32-bit systems, as they cannot express timestamp beyond 2038
anyway.
Signed-off-by: Darcy Burke <acednes@gmail.com>
[jc: fixups for 32-bit platforms]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The system must support 64-bit time and its time_t must be 64-bit
wide to pass these tests. Combine these two prerequisites together
to simplify the tests. In theory, they could be fulfilled
independently and tests could require only one without the other,
but in practice, these must come hand-in-hand.
Update the "check_parse" test helper to pay attention to the
REQUIRE_64BIT_TIME variable, which can be set to the HAVE_64BIT_TIME
prerequisite so that a parse test can be skipped on 32-bit systems.
This will be used in the next step to skip tests for timestamps near
the end of year 2099, as 32-bit systems will not be able to express
a timestamp beyond 2038 anyway.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In an earlier commit, a bug was described where it's possible for Git to
produce non-murmur3 hashes when the platform's "char" type is signed,
and there are paths with characters whose highest bit is set (i.e. all
characters >= 0x80).
That patch allows the caller to control which version of Bloom filters
are read and written. However, even on platforms with a signed "char"
type, it is possible to reuse existing Bloom filters if and only if
there are no changed paths in any commit's first parent tree-diff whose
characters have their highest bit set.
When this is the case, we can reuse the existing filter without having
to compute a new one. This is done by marking trees which are known to
have (or not have) any such paths. When a commit's root tree is verified
to not have any such paths, we mark it as such and declare that the
commit's Bloom filter is reusable.
Note that this heuristic only goes in one direction. If neither a commit
nor its first parent have any paths in their trees with non-ASCII
characters, then we know for certain that a path with non-ASCII
characters will not appear in a tree-diff against that commit's first
parent. The reverse isn't necessarily true: just because the tree-diff
doesn't contain any such paths does not imply that no such paths exist
in either tree.
So we end up recomputing some Bloom filters that we don't strictly have
to (i.e. their bits are the same no matter which version of murmur3 we
use). But culling these out is impossible, since we'd have to perform
the full tree-diff, which is the same effort as computing the Bloom
filter from scratch.
But because we can cache our results in each tree's flag bits, we can
often avoid recomputing many filters, thereby reducing the time it takes
to run
$ git commit-graph write --changed-paths --reachable
when upgrading from v1 to v2 Bloom filters.
To benchmark this, let's generate a commit-graph in linux.git with v1
changed-paths in generation order[^1]:
$ git clone git@github.com:torvalds/linux.git
$ cd linux
$ git commit-graph write --reachable --changed-paths
$ graph=".git/objects/info/commit-graph"
$ mv $graph{,.bak}
Then let's time how long it takes to go from v1 to v2 filters (with and
without the upgrade path enabled), resetting the state of the
commit-graph each time:
$ git config commitGraph.changedPathsVersion 2
$ hyperfine -p 'cp -f $graph.bak $graph' -L v 0,1 \
'GIT_TEST_UPGRADE_BLOOM_FILTERS={v} git.compile commit-graph write --reachable --changed-paths'
On linux.git (where there aren't any non-ASCII paths), the timings
indicate that this patch represents a speed-up over recomputing all
Bloom filters from scratch:
Benchmark 1: GIT_TEST_UPGRADE_BLOOM_FILTERS=0 git.compile commit-graph write --reachable --changed-paths
Time (mean ± σ): 124.873 s ± 0.316 s [User: 124.081 s, System: 0.643 s]
Range (min … max): 124.621 s … 125.227 s 3 runs
Benchmark 2: GIT_TEST_UPGRADE_BLOOM_FILTERS=1 git.compile commit-graph write --reachable --changed-paths
Time (mean ± σ): 79.271 s ± 0.163 s [User: 74.611 s, System: 4.521 s]
Range (min … max): 79.112 s … 79.437 s 3 runs
Summary
'GIT_TEST_UPGRADE_BLOOM_FILTERS=1 git.compile commit-graph write --reachable --changed-paths' ran
1.58 ± 0.01 times faster than 'GIT_TEST_UPGRADE_BLOOM_FILTERS=0 git.compile commit-graph write --reachable --changed-paths'
On git.git, we do have some non-ASCII paths, giving us a more modest
improvement from 4.163 seconds to 3.348 seconds, for a 1.24x speed-up.
On my machine, the stats for git.git are:
- 8,285 Bloom filters computed from scratch
- 10 Bloom filters generated as empty
- 4 Bloom filters generated as truncated due to too many changed paths
- 65,114 Bloom filters were reused when transitioning from v1 to v2.
[^1]: Note that this is is important, since `--stdin-packs` or
`--stdin-commits` orders commits in the commit-graph by their pack
position (with `--stdin-packs`) or in the raw input (with
`--stdin-commits`).
Since we compute Bloom filters in the same order that commits appear
in the graph, we must see a commit's (first) parent before we process
the commit itself. This is only guaranteed to happen when sorting
commits by their generation number.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The murmur3 implementation in bloom.c has a bug when converting series
of 4 bytes into network-order integers when char is signed (which is
controllable by a compiler option, and the default signedness of char is
platform-specific). When a string contains characters with the high bit
set, this bug causes results that, although internally consistent within
Git, does not accord with other implementations of murmur3 (thus,
the changed path filters wouldn't be readable by other off-the-shelf
implementatios of murmur3) and even with Git binaries that were compiled
with different signedness of char. This bug affects both how Git writes
changed path filters to disk and how Git interprets changed path filters
on disk.
Therefore, introduce a new version (2) of changed path filters that
corrects this problem. The existing version (1) is still supported and
is still the default, but users should migrate away from it as soon
as possible.
Because this bug only manifests with characters that have the high bit
set, it may be possible that some (or all) commits in a given repo would
have the same changed path filter both before and after this fix is
applied. However, in order to determine whether this is the case, the
changed paths would first have to be computed, at which point it is not
much more expensive to just compute a new changed path filter.
So this patch does not include any mechanism to "salvage" changed path
filters from repositories. There is also no "mixed" mode - for each
invocation of Git, reading and writing changed path filters are done
with the same version number; this version number may be explicitly
stated (typically if the user knows which version they need) or
automatically determined from the version of the existing changed path
filters in the repository.
There is a change in write_commit_graph(). graph_read_bloom_data()
makes it possible for chunk_bloom_data to be non-NULL but
bloom_filter_settings to be NULL, which causes a segfault later on. I
produced such a segfault while developing this patch, but couldn't find
a way to reproduce it neither after this complete patch (or before),
but in any case it seemed like a good thing to include that might help
future patch authors.
The value in t0095 was obtained from another murmur3 implementation
using the following Go source code:
package main
import "fmt"
import "github.com/spaolacci/murmur3"
func main() {
fmt.Printf("%x\n", murmur3.Sum32([]byte("Hello world!")))
fmt.Printf("%x\n", murmur3.Sum32([]byte{0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}))
}
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Subsequent commits will teach Git another version of changed path
filter that has different behavior with paths that contain at least
one character with its high bit set, so test the existing behavior as
a baseline.
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Implement a mode of the "read-graph" test helper to dump out the
hexadecimal contents of the Bloom filter(s) contained in a commit-graph.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Prepare for the 'read-graph' test helper to perform other tasks besides
dumping high-level information about the commit-graph by extracting its
main routine into a separate function.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The changed-path Bloom filter mechanism is parameterized by a couple of
variables, notably the number of bits per hash (typically "m" in Bloom
filter literature) and the number of hashes themselves (typically "k").
It is critically important that filters are read with the Bloom filter
settings that they were written with. Failing to do so would mean that
each query is liable to compute different fingerprints, meaning that the
filter itself could return a false negative. This goes against a basic
assumption of using Bloom filters (that they may return false positives,
but never false negatives) and can lead to incorrect results.
We have some existing logic to carry forward existing Bloom filter
settings from one layer to the next. In `write_commit_graph()`, we have
something like:
if (!(flags & COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS)) {
struct commit_graph *g = ctx->r->objects->commit_graph;
/* We have changed-paths already. Keep them in the next graph */
if (g && g->chunk_bloom_data) {
ctx->changed_paths = 1;
ctx->bloom_settings = g->bloom_filter_settings;
}
}
, which drags forward Bloom filter settings across adjacent layers.
This doesn't quite address all cases, however, since it is possible for
intermediate layers to contain no Bloom filters at all. For example,
suppose we have two layers in a commit-graph chain, say, {G1, G2}. If G1
contains Bloom filters, but G2 doesn't, a new G3 (whose base graph is
G2) may be written with arbitrary Bloom filter settings, because we only
check the immediately adjacent layer's settings for compatibility.
This behavior has existed since the introduction of changed-path Bloom
filters. But in practice, this is not such a big deal, since the only
way up until this point to modify the Bloom filter settings at write
time is with the undocumented environment variables:
- GIT_TEST_BLOOM_SETTINGS_BITS_PER_ENTRY
- GIT_TEST_BLOOM_SETTINGS_NUM_HASHES
- GIT_TEST_BLOOM_SETTINGS_MAX_CHANGED_PATHS
(it is still possible to tweak MAX_CHANGED_PATHS between layers, but
this does not affect reads, so is allowed to differ across multiple
graph layers).
But in future commits, we will introduce another parameter to change the
hash algorithm used to compute Bloom fingerprints itself. This will be
exposed via a configuration setting, making this foot-gun easier to use.
To prevent this potential issue, validate that all layers of a split
commit-graph have compatible settings with the newest layer which
contains Bloom filters.
Reported-by: SZEDER Gábor <szeder.dev@gmail.com>
Original-test-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The commit-graph stores changed-path Bloom filters which represent the
set of paths included in a tree-level diff between a commit's root tree
and that of its parent.
When a commit has no parents, the tree-diff is computed against that
commit's root tree and the empty tree. In other words, every path in
that commit's tree is stored in the Bloom filter (since they all appear
in the diff).
Consult these filters during pathspec-limited traversals in the function
`rev_same_tree_as_empty()`. Doing so yields a performance improvement
where we can avoid enumerating the full set of paths in a parentless
commit's root tree when we know that the path(s) of interest were not
listed in that commit's changed-path Bloom filter.
Suggested-by: SZEDER Gábor <szeder.dev@gmail.com>
Original-patch-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The existing implementation of test_bloom_filters_not_used() asserts
that the Bloom filter sub-system has not been initialized at all, by
checking for the absence of any data from it from trace2.
In the following commit, it will become possible to load Bloom filters
without using them (e.g., because the `commitGraph.changedPathVersion`
introduced later in this series is incompatible with the hash version
with which the commit-graph's Bloom filters were written).
When this is the case, it's possible to initialize the Bloom filter
sub-system, while still not using any Bloom filters. When this is the
case, check that the data dump from the Bloom sub-system is all zeros,
indicating that no filters were used.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When trying to execute a non-existent program from GIT_PAGER, we display
an error. However, we also send the complete text to the terminal
and return a successful exit code. This can be confusing for the user
and the displayed error could easily become obscured by a lengthy
text.
For example, here the error message would be very far above after
sending 50 MB of text:
$ GIT_PAGER=non-existent t/test-terminal.perl git log | wc -c
error: cannot run non-existent: No such file or directory
50314363
Let's make the error clear by aborting the process and return an error
so that the user can easily correct their mistake.
This will be the result of the change:
$ GIT_PAGER=non-existent t/test-terminal.perl git log | wc -c
error: cannot run non-existent: No such file or directory
fatal: unable to execute pager 'non-existent'
0
The behavior change we're introducing in this commit affects two tests
in t7006, which is a good sign regarding test coverage and requires us
to address it.
The first test is 'git skips paging non-existing command'. This test
comes from f7991f01f2 (t7006: clean up SIGPIPE handling in trace2 tests,
2021-11-21,) where a modification was made to a test that was originally
introduced in c24b7f6736 (pager: test for exit code with and without
SIGPIPE, 2021-02-02). That original test was, IMHO, in the same
direction we're going in this commit.
At any rate, this test obviously needs to be adjusted to check the new
behavior we are introducing. Do it.
The second test being affected is: 'non-existent pager doesnt cause
crash', introduced in f917f57f40 (pager: fix crash when pager program
doesn't exist, 2021-11-24). As its name states, it has the intention of
checking that we don't introduce a regression that produces a crash when
GIT_PAGER points to a nonexistent program.
This test could be considered redundant nowadays, due to us already
having several tests checking implicitly what a non-existent command in
GIT_PAGER produces. However, let's maintain a good belt-and-suspenders
strategy; adapt it to the new world.
Finally, it's worth noting that we are not changing the behavior if the
command specified in GIT_PAGER is a shell command. In such cases, it
is:
$ GIT_PAGER=:\;non-existent t/test-terminal.perl git log
:;non-existent: 1: non-existent: not found
died of signal 13 at t/test-terminal.perl line 33.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git update-server-info" and "git commit-graph --write" have been
updated to use the tempfile API to avoid leaving cruft after
failing.
* tb/commit-graph-use-tempfile:
server-info.c: remove temporary info files on exit
commit-graph.c: remove temporary graph layers on exit
For over a year, setting add.interactive.useBuiltin configuration
variable did nothing but giving a "this does not do anything"
warning. Finally remove it.
* jc/add-i-retire-usebuiltin-config:
add-i: finally retire add.interactive.useBuiltin
We forgot to normalize the result of getcwd() to NFC on macOS where
all other paths are normalized, which has been corrected. This still
does not address the case where core.precomposeUnicode configuration
is not defined globally.
* tb/precompose-getcwd:
macOS: ls-files path fails if path of workdir is NFD
The pseudo-merge reachability bitmap to help more efficient storage
of the reachability bitmap in a repository with too many refs has
been added.
* tb/pseudo-merge-reachability-bitmap: (26 commits)
pack-bitmap.c: ensure pseudo-merge offset reads are bounded
Documentation/technical/bitmap-format.txt: add missing position table
t/perf: implement performance tests for pseudo-merge bitmaps
pseudo-merge: implement support for finding existing merges
ewah: `bitmap_equals_ewah()`
pack-bitmap: extra trace2 information
pack-bitmap.c: use pseudo-merges during traversal
t/test-lib-functions.sh: support `--notick` in `test_commit_bulk()`
pack-bitmap: implement test helpers for pseudo-merge
ewah: implement `ewah_bitmap_popcount()`
pseudo-merge: implement support for reading pseudo-merge commits
pack-bitmap.c: read pseudo-merge extension
pseudo-merge: scaffolding for reads
pack-bitmap: extract `read_bitmap()` function
pack-bitmap-write.c: write pseudo-merge table
pseudo-merge: implement support for selecting pseudo-merge commits
config: introduce `git_config_double()`
pack-bitmap: make `bitmap_writer_push_bitmapped_commit()` public
pack-bitmap: implement `bitmap_writer_has_bitmapped_object_id()`
pack-bitmap-write: support storing pseudo-merge commits
...
We ignore the option --color-moved if an external diff program is
configured, presumably because its overhead is unnecessary in that case.
Respect the option if we don't actually use the external diff, though.
Reported-by: lolligerhans@gmx.de
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The "--heads" option of "ls-remote" and "show-ref" has been been
deprecated; "--branches" replaces "--heads".
* jc/heads-are-branches:
show-ref: introduce --branches and deprecate --heads
ls-remote: introduce --branches and deprecate --heads
refs: call branches branches
When the user adds to "git rebase -i" instruction to "pick" a merge
commit, the error experience is not pleasant. Such an error is now
caught earlier in the process that parses the todo list.
* pw/rebase-i-error-message:
rebase -i: improve error message when picking merge
rebase -i: pass struct replay_opts to parse_insn_line()
Setting core.abbrev too early before the repository set-up
(typically in "git clone") caused segfault, which as been
corrected.
* ps/abbrev-length-before-setup-fix:
object-name: don't try to abbreviate to lengths greater than hexsz
parse-options-cb: stop clamping "--abbrev=" to hash length
config: fix segfault when parsing "core.abbrev" without repo
"git format-patch --interdiff" for multi-patch series learned to
turn on cover letters automatically (unless told never to enable
cover letter with "--no-cover-letter" and such).
* rj/format-patch-auto-cover-with-interdiff:
format-patch: assume --cover-letter for diff in multi-patch series
t4014: cleanups in a few tests
"git update-ref --stdin" learned to handle transactional updates of
symbolic-refs.
* kn/update-ref-symref:
update-ref: add support for 'symref-update' command
reftable: pick either 'oid' or 'target' for new updates
update-ref: add support for 'symref-create' command
update-ref: add support for 'symref-delete' command
update-ref: add support for 'symref-verify' command
refs: specify error for regular refs with `old_target`
refs: create and use `ref_update_expects_existing_old_ref()`
Assorted fixes to multi-pack-index code paths.
* tb/multi-pack-reuse-fix:
pack-revindex.c: guard against out-of-bounds pack lookups
pack-bitmap.c: avoid uninitialized `pack_int_id` during reuse
midx-write.c: do not read existing MIDX with `packs_to_include`
"git diff --exit-code --ext-diff" learned to take the exit status
of the external diff driver into account when deciding the exit
status of the overall "git diff" invocation when configured to do
so.
* rs/diff-exit-code-with-external-diff:
diff: let external diffs report that changes are uninteresting
userdiff: add and use struct external_diff
t4020: test exit code with external diffs
The end of t5500 contains two tests which use a single helper function,
fetch_filter_blob_limit_zero(). It takes a parameter to point to the
path of the server repository, which we store locally as $SERVER. The
first caller uses the relative path "server", while the second points
into the httpd document root.
Commit 07ef3c6604 (fetch test: use more robust test for filtered
objects, 2019-12-23) refactored some lines, but accidentally switched
"$SERVER" to "server" in one spot. That means the second caller is
looking at the server directory from the previous test rather than its
own.
This happens to work out because the "server" directory from the first
test is still hanging around, and the contents of the two are identical.
But it was clearly not the intended behavior, and is fragile to cleaning
up the leftovers from the first test.
Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
