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Author SHA1 Message Date
Derrick Stolee
49abcd21da for-each-ref: add ahead-behind format atom
The previous change implemented the ahead_behind() method, including an
algorithm to compute the ahead/behind values for a number of commit tips
relative to a number of commit bases. Now, integrate that algorithm as
part of 'git for-each-ref' hidden behind a new format atom,
ahead-behind. This naturally extends to 'git branch' and 'git tag'
builtins, as well.

This format allows specifying multiple bases, if so desired, and all
matching references are compared against all of those bases. For this
reason, failing to read a reference provided from these atoms results in
an error.

In order to translate the ahead_behind() method information to the
format output code in ref-filter.c, we must populate arrays of
ahead_behind_count structs. In struct ref_array, we store the full array
that will be passed to ahead_behind(). In struct ref_array_item, we
store an array of pointers that point to the relvant items within the
full array. In this way, we can pull all relevant ahead/behind values
directly when formatting output for a specific item. It also ensures the
lifetime of the ahead_behind_count structs matches the time that the
array is being used.

Add specific tests of the ahead/behind counts in t6600-test-reach.sh, as
it has an interesting repository shape. In particular, its merging
strategy and its use of different commit-graphs would demonstrate over-
counting if the ahead_behind() method did not already account for that
possibility.

Also add tests for the specific for-each-ref, branch, and tag builtins.
In the case of 'git tag', there are intersting cases that happen when
some of the selected tips are not commits. This requires careful logic
around commits_nr in the second loop of filter_ahead_behind(). Also, the
test in t7004 is carefully located to avoid being dependent on the GPG
prereq. It also avoids using the test_commit helper, as that will add
ticks to the time and disrupt the expected timestamps in later tag
tests.

Also add performance tests in a new p1300-graph-walks.sh script. This
will be useful for more uses in the future, but for now compare the
ahead-behind counting algorithm in 'git for-each-ref' to the naive
implementation by running 'git rev-list --count' processes for each
input.

For the Git source code repository, the improvement is already obvious:

Test                                            this tree
---------------------------------------------------------------
1500.2: ahead-behind counts: git for-each-ref   0.07(0.07+0.00)
1500.3: ahead-behind counts: git branch         0.07(0.06+0.00)
1500.4: ahead-behind counts: git tag            0.07(0.06+0.00)
1500.5: ahead-behind counts: git rev-list       1.32(1.04+0.27)

But the standard performance benchmark is the Linux kernel repository,
which demosntrates a significant improvement:

Test                                            this tree
---------------------------------------------------------------
1500.2: ahead-behind counts: git for-each-ref   0.27(0.24+0.02)
1500.3: ahead-behind counts: git branch         0.27(0.24+0.03)
1500.4: ahead-behind counts: git tag            0.28(0.27+0.01)
1500.5: ahead-behind counts: git rev-list       4.57(4.03+0.54)

The 'git rev-list' test exists in this change as a demonstration, but it
will be removed in the next change to avoid wasting time on this
comparison.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-03-20 12:17:33 -07:00
Derrick Stolee
2ee11f7261 commit-graph: return generation from memory
The commit_graph_generation() method used to report a value of
GENERATION_NUMBER_INFINITY if the commit_graph_data_slab had an instance
for the given commit but the graph_pos indicated the commit was not in
the commit-graph file.

However, an upcoming change will introduce the ability to set generation
values in-memory without writing the commit-graph file. Thus, we can no
longer trust 'graph_pos' to indicate whether or not the generation
member can be trusted.

Instead, trust the 'generation' member if the commit has a value in the
slab _and_ the 'generation' member is non-zero. Otherwise, treat it as
GENERATION_NUMBER_INFINITY.

This only makes a difference for a very old case for the commit-graph:
the very first Git release to write commit-graph files wrote zeroes in
the topological level positions. If we are parsing a commit-graph with
all zeroes, those commits will now appear to have
GENERATION_NUMBER_INFINITY (as if they were not parsed from the
commit-graph).

I attempted several variations to work around the need for providing an
uninitialized 'generation' member, but this was the best one I found. It
does require a change to a verification test in t5318 because it reports
a different error than the one about non-zero generation numbers.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-03-20 12:17:33 -07:00
Derrick Stolee
b2c51b7590 for-each-ref: explicitly test no matches
The for-each-ref builtin can take a list of ref patterns, but if none
match, it still succeeds (but with no output). Add an explicit test that
demonstrates that behavior.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-03-20 12:17:32 -07:00
Derrick Stolee
b73dec5530 for-each-ref: add --stdin option
When a user wishes to input a large list of patterns to 'git
for-each-ref' (likely a long list of exact refs) there are frequently
system limits on the number of command-line arguments.

Add a new --stdin option to instead read the patterns from standard
input. Add tests that check that any unrecognized arguments are
considered an error when --stdin is provided. Also, an empty pattern
list is interpreted as the complete ref set.

When reading from stdin, we populate the filter.name_patterns array
dynamically as opposed to pointing to the 'argv' array directly. This is
simple when using a strvec, as it is NULL-terminated in the same way. We
then free the memory directly from the strvec.

Helped-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-03-20 12:17:32 -07:00
Junio C Hamano
4240e0f6c0 Merge branch 'ar/test-lib-remove-stale-comment'
Test library clean-up.

* ar/test-lib-remove-stale-comment:
  test-lib: drop comment about test_description
2023-02-28 16:38:47 -08:00
Junio C Hamano
8760a2b3c6 Merge branch 'zy/t9700-style'
Test style fixes.

* zy/t9700-style:
  t9700: modernize test scripts
2023-02-28 16:38:47 -08:00
Junio C Hamano
a2d2b5229e Merge branch 'pw/rebase-i-parse-fix'
Fixes to code that parses the todo file used in "rebase -i".

* pw/rebase-i-parse-fix:
  rebase -i: fix parsing of "fixup -C<commit>"
  rebase -i: match whole word in is_command()
2023-02-28 16:38:47 -08:00
Junio C Hamano
b2893ea403 Merge branch 'jk/http-test-fixes'
Various fix-ups on HTTP tests.

* jk/http-test-fixes:
  t5559: make SSL/TLS the default
  t5559: fix test failures with LIB_HTTPD_SSL
  t/lib-httpd: enable HTTP/2 "h2" protocol, not just h2c
  t/lib-httpd: respect $HTTPD_PROTO in expect_askpass()
  t5551: drop curl trace lines without headers
  t5551: handle v2 protocol in cookie test
  t5551: simplify expected cookie file
  t5551: handle v2 protocol in upload-pack service test
  t5551: handle v2 protocol when checking curl trace
  t5551: stop forcing clone to run with v0 protocol
  t5551: handle HTTP/2 when checking curl trace
  t5551: lower-case headers in expected curl trace
  t5551: drop redundant grep for Accept-Language
  t5541: simplify and move "no empty path components" test
  t5541: stop marking "used receive-pack service" test as v0 only
  t5541: run "used receive-pack service" test earlier
2023-02-28 16:38:47 -08:00
Junio C Hamano
630501ceef Merge branch 'jc/countermand-format-attach'
The format.attach configuration variable lacked a way to override a
value defined in a lower-priority configuration file (e.g. the
system one) by redefining it in a higher-priority configuration
file.  Now, setting format.attach to an empty string means show the
patch inline in the e-mail message, without using MIME attachment.

This is a backward incompatible change.

* jc/countermand-format-attach:
  format.attach: allow empty value to disable multi-part messages
2023-02-27 10:08:57 -08:00
Junio C Hamano
dda83e69d0 Merge branch 'jk/shorten-unambiguous-ref-wo-sscanf'
sscanf(3) used in "git symbolic-ref --short" implementation found
to be not working reliably on macOS in UTF-8 locales.  Rewrite the
code to avoid sscanf() altogether to work it around.

* jk/shorten-unambiguous-ref-wo-sscanf:
  shorten_unambiguous_ref(): avoid sscanf()
  shorten_unambiguous_ref(): use NUM_REV_PARSE_RULES constant
  shorten_unambiguous_ref(): avoid integer truncation
2023-02-27 10:08:57 -08:00
Junio C Hamano
7dc55a04d8 Merge branch 'mh/credential-password-expiry'
The credential subsystem learned that a password may have an
explicit expiration.

* mh/credential-password-expiry:
  credential: new attribute password_expiry_utc
2023-02-27 10:08:57 -08:00
Junio C Hamano
5e572aaa5d Merge branch 'rs/archive-mtime'
"git archive HEAD^{tree}" records the paths with the current
timestamp in the archive, making it harder to obtain a stable
output.  The command learned the --mtime option to specify an
arbitrary timestamp (e.g. --mtime="@0 +0000" for the epoch).

* rs/archive-mtime:
  archive: add --mtime
2023-02-27 10:08:57 -08:00
Junio C Hamano
b8840a72e2 Merge branch 'tb/drop-dir-iterator-follow-symlink-bit'
Remove leftover and unused code.

* tb/drop-dir-iterator-follow-symlink-bit:
  t0066: drop setup of "dir5"
  dir-iterator: drop unused `DIR_ITERATOR_FOLLOW_SYMLINKS`
2023-02-27 10:08:57 -08:00
Junio C Hamano
63f74cfbcc Merge branch 'tl/range-diff-custom-abbrev'
"git range-diff" learned --abbrev=<num> option.

* tl/range-diff-custom-abbrev:
  range-diff: let '--abbrev' option takes effect
2023-02-27 10:08:56 -08:00
Junio C Hamano
93c12724f1 Merge branch 'ap/t2015-style-update'
Test clean-up.

* ap/t2015-style-update:
  t2015-checkout-unborn.sh: changes the style for cd
2023-02-27 10:08:56 -08:00
Junio C Hamano
ece8dc97ae Merge branch 'jc/diff-algo-attribute'
The "diff" drivers specified by the "diff" attribute attached to
paths can now specify which algorithm (e.g. histogram) to use.

* jc/diff-algo-attribute:
  diff: teach diff to read algorithm from diff driver
  diff: consolidate diff algorithm option parsing
2023-02-27 10:08:56 -08:00
Junio C Hamano
21522cf5d0 Merge branch 'pw/rebase-i-validate-labels-early'
An invalid label or ref in the "rebase -i" todo file used to
trigger an runtime error. SUch an error is now diagnosed while the
todo file is parsed.

* pw/rebase-i-validate-labels-early:
  rebase -i: check labels and refs when parsing todo list
2023-02-27 10:08:56 -08:00
Andrei Rybak
c600a91c94 test-lib: drop comment about test_description
When a comment describing how each test file should start was added in
commit [1], it was the second comment of t/test-lib.sh.  The comment
describes how variable "test_description" is supposed to be assigned at
the top of each test file and how "test-lib.sh" should be used by
sourcing it.  However, even in [1], the comment was ten lines away from
the usage of the variable by test-lib.sh.  Since then, the comment has
drifted away both from the top of the file and from the usage of the
variable.  The comment just sits in the middle of the initialization of
the test library, surrounded by unrelated code, almost one hundred lines
away from the usage of "test_description".

Nobody has noticed this drift during evolution of test-lib.sh, which
suggests that this comment has outlived its usefulness.  The assignment
of "test_description", sourcing of "test-lib.sh" by tests, and the
process of writing tests in general are described in detail in
"t/README".  So drop the obsolete comment.

An alternative solution could be to move the comment either to the top
of the file, or down to the usage of variable "test_description".

[1] e1970ce43a ("[PATCH 1/2] Test framework take two.", 2005-05-13)

Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-27 09:25:34 -08:00
Zhang Yi
509d3f5103 t9700: modernize test scripts
The style of t9700-perl-git.sh is old. There are 3 problems:
* A title is not on the same line with test_expect_success command.
* A test body is indented by whitespaces.
* There are whitespaces after redirect operators.

Modernize test scripts by:
* Combine the title with test_expect_success command.
* Replace whitespace indents with TAB.
* Delete whitespaces after redirect operators.

Signed-off-by: Zhang Yi <18994118902@163.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-25 12:20:06 -08:00
Junio C Hamano
f96dd8c3b5 Merge branch 'ps/free-island-marks'
Fix on a previous fix already in 'master'.

* ps/free-island-marks:
  delta-islands: fix segfault when freeing island marks
2023-02-24 22:54:01 -08:00
Junio C Hamano
6f581b6d6d Merge branch 'jk/http-proxy-tests'
Test updates.

* jk/http-proxy-tests:
  add basic http proxy tests
2023-02-24 22:54:01 -08:00
Junio C Hamano
d180cc2979 Merge branch 'ma/fetch-parallel-use-online-cpus'
"git fetch --jobs=0" used to hit a BUG(), which has been corrected
to use the available CPUs.

* ma/fetch-parallel-use-online-cpus:
  fetch: choose a sensible default with --jobs=0 again
2023-02-24 22:54:00 -08:00
Junio C Hamano
deb32d6d60 Merge branch 'jc/genzeros-avoid-raw-write'
A test helper had a single write(2) of 256kB, which was too big for
some platforms (e.g. NonStop), which has been corrected by using
xwrite() wrapper appropriately.

* jc/genzeros-avoid-raw-write:
  test-genzeros: avoid raw write(2)
2023-02-24 11:32:30 -08:00
Junio C Hamano
38a227b796 Merge branch 'js/gpg-errors'
Error messages given upon a signature verification failure used to
discard the errors from underlying gpg program, which has been
corrected.

* js/gpg-errors:
  gpg: do show gpg's error message upon failure
  t7510: add a test case that does not need gpg
2023-02-24 11:32:29 -08:00
Junio C Hamano
98619325c0 Merge branch 'rs/ctype-test'
Test safe_ctype

* rs/ctype-test:
  test-ctype: test iscntrl, ispunct, isxdigit and isprint
  test-ctype: test islower and isupper
  test-ctype: test isascii
2023-02-24 11:32:29 -08:00
Phillip Wood
666b6e1135 rebase -i: fix parsing of "fixup -C<commit>"
If the user omits the space between "-C" and the commit in a fixup
command then it is parsed as an ordinary fixup and the commit message is
not updated as it should be. Fix this by making the space between "-C"
and "<commit>" optional as it is for the "merge" command.

Note that set_replace_editor() is changed to set $GIT_SEQUENCE_EDITOR
instead of $EDITOR in order to be able to replace the todo list and
reword commits with $FAKE_COMMIT_MESSAGE. This is safe as all the
existing users are using set_replace_editor() to replace the todo list.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 14:25:50 -08:00
Phillip Wood
7aed2c0565 rebase -i: match whole word in is_command()
When matching an unabbreviated command is_command() only does a prefix
match which means it parses "pickled" as TODO_PICK. parse_insn_line()
does error out because is_command() only advances as far as the end of
"pick" so it looks like the command name is not followed by a space but
the error message is "missing arguments for pick" rather than telling
the user that the "pickled" is not a valid command.

Fix this by ensuring the match is follow by whitespace or the end of the
string as we already do for abbreviated commands. The (*bol = p) at the
end of the condition is a bit cute for my taste but I decided to leave
it be for now. Rather than add new tests the existing tests for bad
commands are adapted to use a bad command name that triggers the prefix
matching bug.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 14:25:48 -08:00
Jeff King
8f2146dbf1 t5559: make SSL/TLS the default
The point of t5559 is run the regular t5551 tests with HTTP/2. But it
does so with the "h2c" protocol, which uses cleartext upgrades from
HTTP/1.1 to HTTP/2 (rather than learning about HTTP/2 support during the
TLS negotiation).

This has a few problems:

 - it's not very indicative of the real world. In practice, most servers
   that support HTTP/2 will also support TLS.

 - support for upgrading does not seem as robust. In particular, we've
   run into bugs in some versions of Apache's mod_http2 that trigger
   only with the upgrade mode. See:

     https://lore.kernel.org/git/Y8ztIqYgVCPILJlO@coredump.intra.peff.net/

So the upside is that this change makes our HTTP/2 tests more robust and
more realistic. The downside is that if we can't set up SSL for any
reason, we'll skip the tests (even though you _might_ have been able to
run the HTTP/2 tests the old way). We could probably have a conditional
fallback, but it would be complicated for little gain, and it's not even
clear it would help (i.e., would any test environment even have HTTP/2
but not SSL support?).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:18 -08:00
Jeff King
86190028a8 t5559: fix test failures with LIB_HTTPD_SSL
One test needs to be tweaked in order for t5559 to pass with SSL/TLS set
up. When we make our initial clone, we check that the curl trace of
requests is what we expected. But we need to fix two things:

  - along with ignoring "data" lines from the trace, we need to ignore
    "SSL data" lines

  - when TLS is used, the server is able to tell the client (via ALPN)
    that it supports HTTP/2 before the first HTTP request is made. So
    rather than request an upgrade using an HTTP header, it can just
    speak HTTP/2 immediately

With this patch, running:

  LIB_HTTPD_SSL=1 ./t5559-http-fetch-smart-http2.sh

works, whereas it did not before.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:17 -08:00
Jeff King
3c14419c6b t/lib-httpd: enable HTTP/2 "h2" protocol, not just h2c
Commit 73c49a4474 (t: run t5551 tests with both HTTP and HTTP/2,
2022-11-11) added Apache config to enable HTTP/2. However, it only
enabled the "h2c" protocol, which allows cleartext HTTP/2 (generally
based on an upgrade header during an HTTP/1.1 request). This is what
t5559 is generally testing, since by default we don't set up SSL/TLS.

However, it should be possible to run t5559 with LIB_HTTPD_SSL set. In
that case, Apache will advertise support for HTTP/2 via ALPN during the
TLS handshake. But we need to tell it support "h2" (the non-cleartext
version) to do so. Without that, then curl does not even try to do the
HTTP/1.1 upgrade (presumably because after seeing that we did TLS but
didn't get the ALPN indicator, it assumes it would be fruitless).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:17 -08:00
Jeff King
9d15b1e5df t/lib-httpd: respect $HTTPD_PROTO in expect_askpass()
When the HTTP tests are run with LIB_HTTPD_SSL in the environment, then
we access the test server as https://. This causes expect_askpass to
complain, because it tries to blindly match "http://" in the prompt
shown to the user. We can adjust this to use $HTTPD_PROTO, which is set
during the setup phase.

Note that this is enough for t5551 and t5559 to pass when run with
https, but there are similar problems in other scripts that will need to
be fixed before the whole suite can run with LIB_HTTPD_SSL.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
b71a2bf11f t5551: drop curl trace lines without headers
We pick apart a curl trace, looking for "=> Send header:" and so on, and
matching against an expected set of requests and responses. We remove
"== Info" lines entirely. However, our parser is fooled when running the
test with LIB_HTTPD_SSL on Ubuntu 20.04 (as found in our linux-gcc CI
job), as curl hands us an "Info" buffer with a newline, and we get:

  == Info: successfully set certificate verify locations:
  == Info:   CAfile: /etc/ssl/certs/ca-certificates.crt
    CApath: /etc/ssl/certs
  => Send SSL data[...]

which results in the "CApath" line ending up in the cleaned-up output,
causing the test to fail.

Arguably the tracing code should detect this and put it on two separate
"== Info" lines. But this is actually a curl bug, fixed by their
80d73bcca (tls: provide the CApath verbose log on its own line,
2020-08-18). It's simpler to just work around it here.

Since we are using GIT_TRACE_CURL, every line should just start with one
of "<=", "==", or "=>", and we can throw away anything else. In fact, we
can just replace the pattern for deleting "*" lines. Those were from the
old GIT_CURL_VERBOSE output, but we switched over in 14e24114d9
(t5551-http-fetch-smart.sh: use the GIT_TRACE_CURL environment var,
2016-09-05).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
93ea5bf3a8 t5551: handle v2 protocol in cookie test
After making a request, we check that it stored the expected cookies.
This depends on the protocol version, because the cookies we store
depend on the exact requests we made (and for ls-remote, v2 will always
hit /git-upload-pack to get the refs, whereas v0 is happy with the
initial ref advertisement).

As a result, hardly anybody runs this test, as you'd have to manually
set GIT_TEST_PROTOCOL_VERSION=0 to do so.

Let's teach it to handle both protocol versions. One way to do this
would be to make the expectation conditional on the protocol used. But
there's a simpler solution. The reason that v0 doesn't hit
/git-upload-pack is that ls-remote doesn't fetch any objects. If we
instead do a fetch (making sure there's an actual object to grab), then
both v0 and v2 will hit the same endpoints and set the same cookies.

Note that we do have to clean up our new tag here; otherwise it confuses
the later "clone 2,000 tags" test.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
87d38afa0d t5551: simplify expected cookie file
After making an HTTP request that should store cookies, we check that
the expected values are in the cookie file. We don't want to look at the
whole file, because it has noisy comments at the top that we shouldn't
depend on. But we strip out the interesting bits using "tail -3", which
is brittle. It requires us to put an extra blank line in our expected
output, and it would fail to notice any reordering or extra content in
the cookie file.

Instead, let's just grep for non-blank lines that are not comments,
which more directly describes what we're interested in.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
795d713e2c t5551: handle v2 protocol in upload-pack service test
We perform a clone and a fetch, and then check that we saw the expected
requests in Apache's access log. In the v2 protocol, there will be one
extra request to /git-upload-pack for each operation (since the initial
/info/refs probe is just used to upgrade the protocol).

As a result, this test is a noop unless the use of the v0 protocol is
forced. Which means that hardly anybody runs it, since you have to do so
manually.

Let's update it to handle v2 and run it always. We could do this by just
conditionally adding in the extra POST lines. But if we look at the
origin of the test in 7da4e2280c (test smart http fetch and push,
2009-10-30), the point is really just to make sure that the smart
git-upload-pack service was used at all. So rather than counting up the
individual requests, let's just make sure we saw each of the expected
types. This is a bit looser, but makes maintenance easier.

Since we're now matching with grep, we can also loosen the HTTP/1.1
match, which allows this test to pass when run with HTTP/2 via t5559.
That lets:

  GIT_TEST_PROTOCOL_VERSION=0 ./t5559-http-fetch-smart-http2.sh

run to completion, which previously failed (and of course it works if
you use v2, as well).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
1c5a63818a t5551: handle v2 protocol when checking curl trace
After cloning an http repository, we check the curl trace to make sure
the expected requests were made. But since the expected trace was never
updated to handle v2, it is only run when you ask the test suite to run
in v0 mode (which hardly anybody does).

Let's update it to handle both protocols. This isn't too hard since v2
just sends an extra header and an extra request. So we can just annotate
those extra lines and strip them out for v0 (and drop the annotations
for v2). I didn't bother handling v1 here, as it's not really of
practical interest (it would drop the extra v2 request, but still have
the "git-protocol" lines).

There's a similar tweak needed at the end. Since we check the
"accept-encoding" value loosely, we grep for it rather than finding it
in the verbatim trace. This grep insists that there are exactly 2
matches, but of course in v2 with the extra request there are 3. We
could tweak the number, but it's simpler still to just check that we saw
at least one match. The verbatim check already confirmed how many
instances of the header we have; we're really just checking here that
"gzip" is in the value (it's possible, of course, that the headers could
have different values, but that seems like an unlikely bug).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
2f87277dfa t5551: stop forcing clone to run with v0 protocol
In the "clone http repository" test, we check the curl trace to make
sure the expected requests were made. This whole script was marked to
handle only the v0 protocol in d790ee1707 (tests: fix protocol version
for overspecifications, 2019-02-25). That makes sense, since v2 requires
an extra request, so tests as specific as this would fail unless
modified.

Later, in preparation for v2 becoming the default, this was tweaked by
8a1b0978ab (test: request GIT_TEST_PROTOCOL_VERSION=0 when appropriate,
2019-12-23). There we run the trace check only if the user has
explicitly asked to test protocol version 0. But it also forced the
clone itself to run with the v0 protocol.

This makes the check for "can we expect a v0 trace" silly; it will
always be v0. But much worse, it means that the clone we are testing is
not like the one that normal users would run. They would use the
defaults, which are now v2.  And since this is supposed to be a basic
check of clone-over-http, we should do the same.

Let's fix this by dropping the extra v0 override. The test still passes
because the trace checking only kicks in if we asked to use v0
explicitly (this is the same as before; even though we were running a v0
clone, unless you specifically set GIT_TEST_PROTOCOL_VERSION=0, the
trace check was always skipped).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:15 -08:00
Jeff King
8dfe36b007 t5551: handle HTTP/2 when checking curl trace
We check that the curl trace of a clone has the lines we expect, but
this won't work when we run the test under t5559, because a few details
are different under HTTP/2 (but nobody noticed because it only happens
when you manually set GIT_TEST_PROTOCOL_VERSION to "0").

We can handle both HTTP protocols with a few tweaks:

  - we'll drop the HTTP "101 Switching Protocols" response, as well as
    various protocol upgrade headers. These details aren't interesting
    to us. We just want to make sure the correct protocol was used (and
    we do in the main request/response lines).

  - successful HTTP/2 responses just say "200" and not "200 OK"; we can
    normalize these

  - replace HTTP/1.1 with a variable in the request/response lines. We
    can use the existing $HTTP_PROTO for this, as it's already set to
    "HTTP/2" when appropriate. We do need to tweak the fallback value to
    "HTTP/1.1" to match what curl will write (prior to this patch, the
    fallback value didn't matter at all; we only checked if it was the
    literal string "HTTP/2").

Note that several lines still expect HTTP/1.1 unconditionally. The first
request does so because the client requests an upgrade during the
request. The POST request and response do so because you can't do an
upgrade if there is a request body. (This will all be different if we
trigger HTTP/2 via ALPN, but the tests aren't yet capable of that).

This is enough to let:

  GIT_TEST_PROTOCOL_VERSION=0 ./t5559-http-fetch-smart-http2.sh

pass the "clone http repository" test (but there are some other failures
later on).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:14 -08:00
Jeff King
4a21230ab0 t5551: lower-case headers in expected curl trace
There's a test in t5551 which checks the curl trace (after simplifying
it a bit). It doesn't work with HTTP/2, because in that case curl
outputs all of the headers in lower-case. Even though this test is run
with HTTP/2 by t5559, nobody has noticed because checking the trace only
happens if GIT_TEST_PROTOCOL_VERSION is manually set to "0".

Let's fix this by lower-casing all of the header names in the trace, and
then checking for those in our expected code (this is easier than making
HTTP/2 traces look like HTTP/1.1, since HTTP/1.1 uses title-casing).

Sadly, we can't quite do this in our existing sed script. This works if
you have GNU sed:

  s/^\\([><]\\) \\([A-Za-z0-9-]*:\\)/\1 \L\2\E/

but \L is a GNU-ism, and I don't think there's a portable solution. We
could just "tr A-Z a-z" on the way in, of course, but that makes the
non-header parts harder to read (e.g., lowercase "post" requests). But
to paraphrase Baron Munchausen, I have learned from experience that a
modicum of Perl can be most efficacious.

Note that this doesn't quite get the test passing with t5559; there are
more fixes needed on top.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:14 -08:00
Jeff King
a58f4d6328 t5551: drop redundant grep for Accept-Language
Commit b0c4adcdd7 (remote-curl: send Accept-Language header to server,
2022-07-11) added tests to make sure the header is sent via HTTP.
However, it checks in two places:

  1. In the expected trace output, we check verbatim for the header and
     its value.

  2. Afterwards, we grep for the header again in the trace file.

This (2) is probably cargo-culted from the earlier grep for
Accept-Encoding. It is needed for the encoding because we smudge the
value of that header when doing the verbatim check; see 1a53e692af
(remote-curl: accept all encodings supported by curl, 2018-05-22).

But we don't do so for the language header, so any problem that the
"grep" would catch in (2) would already have been caught by (1).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:14 -08:00
Jeff King
f1449a563f t5541: simplify and move "no empty path components" test
Commit 9ee6bcd398 (t5541-http-push: add test for URLs with trailing
slash, 2010-04-08) added a test that clones a URL with a trailing slash,
and confirms that we don't send a doubled slash (like "$url//info/refs")
to the server.

But this test makes no sense in t5541, which is about pushing. It should
have been added in t5551. Let's move it there.

But putting it at the end is tricky, since it checks the entire contents
of the Apache access log. We could get around this by clearing the log
before our test. But there's an even simpler solution: just make sure no
doubled slashes appear in the log (fortunately, "http://" does not
appear in the log itself).

As a bonus, this also lets us drop the check for the v0 protocol (which
is otherwise necessary since v2 makes multiple requests, and
check_access_log insists on exactly matching the number of requests,
even though we don't care about that here).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:14 -08:00
Jeff King
6ec90b5bf1 t5541: stop marking "used receive-pack service" test as v0 only
We have a test which checks to see if a request to git-receive-pack was
made. Originally, it was checking the entire set of requests made in the
script so far, including clones, and thus it would break when run with
the v2 protocol (since that implies an extra request for fetches).

Since the previous commit, though, we are only checking the requests
made by a single push. And since there is no v2 push protocol, the test
now passes no matter what's in GIT_TEST_PROTOCOL_VERSION. We can just
run it all the time.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:14 -08:00
Jeff King
77fb36aa7e t5541: run "used receive-pack service" test earlier
There's a test in t5541 that confirms that "git push" makes two requests
(a GET to /info/refs, and a POST to /git-receive-pack). However, it's a
noop unless GIT_TEST_PROTOCOL_VERSION is set to "0", due to 8a1b0978ab
(test: request GIT_TEST_PROTOCOL_VERSION=0 when appropriate,
2019-12-23).

This means that almost nobody runs it. And indeed, it has been broken
since b0c4adcdd7 (remote-curl: send Accept-Language header to server,
2022-07-11). But the fault is not in that commit, but in how brittle the
test is. It runs after several operations have been performed, which
means that it expects to see the complete set of requests made so far in
the script. Commit b0c4adcdd7 added a new test, which means that the
"used receive-pack service" test must be updated, too.

Let's fix this by making the test less brittle. We'll move it higher in
the script, right after the first push has completed. And we'll clear
the access log right before doing the push, so we'll see only the
requests from that command.

This is technically testing less, in that we won't check that all of
those other requests also correctly used smart http. But there's no
particular reason think that if the first one did, the others wouldn't.

After this patch, running:

  GIT_TEST_PROTOCOL_VERSION=0 ./t5541-http-push-smart.sh

passes, whereas it did not before.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-23 13:01:14 -08:00
M Hickford
d208bfdfef credential: new attribute password_expiry_utc
Some passwords have an expiry date known at generation. This may be
years away for a personal access token or hours for an OAuth access
token.

When multiple credential helpers are configured, `credential fill` tries
each helper in turn until it has a username and password, returning
early. If Git authentication succeeds, `credential approve`
stores the successful credential in all helpers. If authentication
fails, `credential reject` erases matching credentials in all helpers.
Helpers implement corresponding operations: get, store, erase.

The credential protocol has no expiry attribute, so helpers cannot
store expiry information. Even if a helper returned an improvised
expiry attribute, git credential discards unrecognised attributes
between operations and between helpers.

This is a particular issue when a storage helper and a
credential-generating helper are configured together:

	[credential]
		helper = storage  # eg. cache or osxkeychain
		helper = generate  # eg. oauth

`credential approve` stores the generated credential in both helpers
without expiry information. Later `credential fill` may return an
expired credential from storage. There is no workaround, no matter how
clever the second helper. The user sees authentication fail (a retry
will succeed).

Introduce a password expiry attribute. In `credential fill`, ignore
expired passwords and continue to query subsequent helpers.

In the example above, `credential fill` ignores the expired password
and a fresh credential is generated. If authentication succeeds,
`credential approve` replaces the expired password in storage.
If authentication fails, the expired credential is erased by
`credential reject`. It is unnecessary but harmless for storage
helpers to self prune expired credentials.

Add support for the new attribute to credential-cache.
Eventually, I hope to see support in other popular storage helpers.

Example usage in a credential-generating helper
https://github.com/hickford/git-credential-oauth/pull/16

Signed-off-by: M Hickford <mirth.hickford@gmail.com>
Reviewed-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-22 15:18:58 -08:00
Junio C Hamano
5048df67b2 Merge branch 'ab/hook-api-with-stdin'
Extend the run-hooks API to allow feeding data from the standard
input when running the hook script(s).

* ab/hook-api-with-stdin:
  hook: support a --to-stdin=<path> option
  sequencer: use the new hook API for the simpler "post-rewrite" call
  hook API: support passing stdin to hooks, convert am's 'post-rewrite'
  run-command: allow stdin for run_processes_parallel
  run-command.c: remove dead assignment in while-loop
2023-02-22 14:55:45 -08:00
Junio C Hamano
72972ea0b9 Merge branch 'ab/various-leak-fixes'
Leak fixes.

* ab/various-leak-fixes:
  push: free_refs() the "local_refs" in set_refspecs()
  push: refactor refspec_append_mapped() for subsequent leak-fix
  receive-pack: release the linked "struct command *" list
  grep API: plug memory leaks by freeing "header_list"
  grep.c: refactor free_grep_patterns()
  builtin/merge.c: free "&buf" on "Your local changes..." error
  builtin/merge.c: use fixed strings, not "strbuf", fix leak
  show-branch: free() allocated "head" before return
  commit-graph: fix a parse_options_concat() leak
  http-backend.c: fix cmd_main() memory leak, refactor reg{exec,free}()
  http-backend.c: fix "dir" and "cmd_arg" leaks in cmd_main()
  worktree: fix a trivial leak in prune_worktrees()
  repack: fix leaks on error with "goto cleanup"
  name-rev: don't xstrdup() an already dup'd string
  various: add missing clear_pathspec(), fix leaks
  clone: use free() instead of UNLEAK()
  commit-graph: use free_commit_graph() instead of UNLEAK()
  bundle.c: don't leak the "args" in the "struct child_process"
  tests: mark tests as passing with SANITIZE=leak
2023-02-22 14:55:45 -08:00
Junio C Hamano
5fc6d00b65 Merge branch 'en/name-rev-make-taggerdate-much-less-important'
"git name-rev" heuristics update.

* en/name-rev-make-taggerdate-much-less-important:
  name-rev: fix names by dropping taggerdate workaround
2023-02-22 14:55:44 -08:00
Teng Long
2b15969f61 range-diff: let '--abbrev' option takes effect
As mentioned in 'git-range-diff.txt': "`git range-diff` also accepts the
regular diff options (see linkgit:git-diff[1])...", but '--abbrev' is not
in the "regular" scope.

In Git, the "abbrev" of an object may not be a fixed value in different
repositories, depending on the needs of the them(Linus mentioned in
e6c587c7 in 2016: "the Linux kernel project needs 11 to 12 hexdigits"
at that time ), that's why a user may want to display abbrev according
to a specified length.

Although a similar effect can be achieved through configuration (like:
git -c core.abbrev=<abbrev>), but based on ease of use (many users may not
know that the -c option can be specified) and the description in existing
document, supporting users to directly use '--abbrev', could be a good way.

Signed-off-by: Teng Long <dyroneteng@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-21 14:02:05 -08:00
Matthias Aßhauer
c39952b925 fetch: choose a sensible default with --jobs=0 again
prior to 51243f9 (run-command API: don't fall back on online_cpus(),
2022-10-12) `git fetch --multiple --jobs=0` would choose some default amount
of jobs, similar to `git -c fetch.parallel=0 fetch --multiple`. While our
documentation only ever promised that `fetch.parallel` would fall back to a
"sensible default", it makes sense to do the same for `--jobs`. So fall back
to online_cpus() and not BUG() out.

This fixes https://github.com/git-for-windows/git/issues/4302

Reported-by: Drew Noakes <drnoakes@microsoft.com>
Signed-off-by: Matthias Aßhauer <mha1993@live.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-21 12:09:40 -08:00
Ashutosh Pandey
d35d8f2e7a t2015-checkout-unborn.sh: changes the style for cd
the `cd` followed the old style which wasn't consistent with the rest of
the test suite, so this commit makes it consistent with the current
style of the test suite for `cd` in  subshell.

Signed-off-by: Ashutosh Pandey <ashutosh.pandeyhlr007@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-02-21 12:01:53 -08:00