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Both v2 pack index files and the v3 format specified as part of the
NewHash work have similar data starting at the CRC table. Much of the
existing code wants to read either this table or the offset entries
following it, and in doing so computes the offset each time.
In order to share as much code between v2 and v3, compute the offset of
the CRC table and store it when the pack is opened. Use this value to
compute offsets to not only the CRC table, but to the offset entries
beyond it.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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One of the test assertions in this test checks that git branch -m works
even without a .git/config file. However, if the repository requires
configuration extensions, such as because it uses a non-SHA-1 algorithm,
this assertion will fail. Mark the assertion as requiring SHA-1.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we're checking the repository's format, set the hash algorithm at
the same time. This ensures that we perform a suitable initialization
early enough to avoid confusing any parts of the code. If we defer
until later, we can end up with portions of the code which are confused
about the hash algorithm, resulting in segfaults when working with
SHA-256 repositories.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Parse the server's object-format capability and respond accordingly,
dying if there is a mismatch.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Ensure that we pass the object-format capability in the synthesized test
data so that this test works with algorithms other than SHA-1.
In addition, add an additional test using the old data for when we're
using SHA-1 so that we can be sure that we preserve backwards
compatibility with servers not offering the object-format capability.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When performing a clone, we don't know what hash algorithm the other end
will support. Currently, we don't support fetching data belonging to a
different algorithm, so we must know what algorithm the remote side is
using in order to properly initialize the repository. We can know that
only after fetching the refs, so if the remote side has any references,
use that information to reinitialize the repository with the correct
hash algorithm information.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Implement the object-format extensions that let us determine the hash
algorithm in use when pushing, pulling, and fetching.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Implement the object-format extensions that let us determine the hash
algorithm in use when pushing or pulling data.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Update the remote helper docs to document the object-format extensions
we will implement in remote-curl and the transport helper code shortly.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Detect when the server doesn't support our hash algorithm and abort.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If we're fetching refs, detect the hash algorithm and parse the refs
using that algorithm.
As mentioned in the documentation, if multiple versions of the
object-format capability are provided, we use the first. No known
implementation supports multiple algorithms now, but they may in the
future.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Detect when the server doesn't support our hash algorithm and abort.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We're going to be using this function in other files, so no longer mark
this function static.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Detect when the server doesn't support our hash algorithm and abort.
If the server does support our hash, advertise it as part of our
capabilities.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a function, server_supports_hash, to see if the remote server
supports a particular hash algorithm when speaking protocol v1.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When connecting to a remote system, we need to know what hash algorithm
it will be using to talk to us. Add a hash_algo member to struct
transport and add a function to read this data from the transport
object.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a member for the hash algorithm currently in use to the packet
reader so it can parse references correctly.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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So far in protocol v2, all of our server capabilities that have values
have not had values that we've been interested in parsing. For example,
we receive but ignore the agent value.
However, in a future commit, we're going to want to parse out the value
of a server capability. To make this easy, add a function,
server_feature_v2, that can fetch the value provided as part of the
server capability.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a capability response, we can have multiple symref entries. In the
future, we will also allow for multiple hash algorithms to be specified.
To avoid duplication, expand the parse_feature_value function to take an
optional offset where the parsing should begin next time. Add a wrapper
function that allows us to query the next server feature value, and use
it in the existing symref parsing code.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Advertise the current hash algorithm in use by using the object-format
capability as part of the ref advertisement.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When parsing capabilities for the pack protocol, there are times we'll
want to compare the value of a capability to a NUL-terminated string.
Since the data we're reading will be space-terminated, not
NUL-terminated, we need a function that compares the two strings, but
also checks that they're the same length. Otherwise, if we used strncmp
to compare these strings, we might accidentally accept a parameter that
was a prefix of the expected value.
Add a function, xstrncmpz, that takes a NUL-terminated string and a
non-NUL-terminated string, plus a length, and compares them, ensuring
that they are the same length.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a future patch, we'll want to access multiple members from struct
packet_reader when parsing references. Therefore, have the ref parsing
code take pointers to struct reader instead of having to pass multiple
arguments to each function.
Rename the len variable to "linelen" to make it clearer what the
variable does in light of the variable change.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Document a capability that indicates which hash algorithms are in use by
both sides of a remote connection. Use the term "object-format", since
this is the term used for the repository extension as well.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The pattern here looking for failures is specific to SHA-1. Let's
create a variable that matches the regex or glob pattern for a path
within the objects directory.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Recent change to show files and line numbers of a breakage during
test (only available when running the tests with bash) were hurting
other shells with syntax errors, which has been corrected.
* cb/test-bash-lineno-fix:
t/test_lib: avoid naked bash arrays in file_lineno
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The basic test did not honor $TEST_SHELL_PATH setting, which has
been corrected.
* cb/t0000-use-the-configured-shell:
t/t0000-basic: make sure subtests also use TEST_SHELL_PATH
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Doc update.
* bc/doc-credential-helper-value:
docs: document credential.helper allowed values
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Doc update.
* dl/doc-stash-remove-mention-of-reflog:
Doc: reference the "stash list" in autostash docs
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The <stdlib.h> header on NetBSD brings in its own definition of
hmac() function (eek), which conflicts with our own and unrelated
function with the same name. Our function has been renamed to work
around the issue.
* cb/avoid-colliding-with-netbsd-hmac:
builtin/receive-pack: avoid generic function name hmac()
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"git restore --staged --worktree" now defaults to take the contents
out of "HEAD", instead of erring out.
* es/restore-staged-from-head-by-default:
restore: default to HEAD when combining --staged and --worktree
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The coding guideline for shell scripts instructed to refer to a
variable with dollar-sign inside arithmetic expansion to work
around a bug in old versions of dash, which is a thing of the past.
Now we are not forbidden from writing $((var+1)).
* jk/arith-expansion-coding-guidelines:
CodingGuidelines: drop arithmetic expansion advice to use "$x"
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The sparse-checkout patterns have been forbidden from excluding all
paths, leaving an empty working tree, for a long time. This
limitation has been lifted.
* ds/sparse-allow-empty-working-tree:
sparse-checkout: stop blocking empty workdirs
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Fix a leak noticed by fuzzer.
* jt/commit-graph-plug-memleak:
commit-graph: avoid memory leaks
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"git branch" and other "for-each-ref" variants accepted multiple
--sort=<key> options in the increasing order of precedence, but it
had a few breakages around "--ignore-case" handling, and tie-breaking
with the refname, which have been fixed.
* jk/for-each-ref-multi-key-sort-fix:
ref-filter: apply fallback refname sort only after all user sorts
ref-filter: apply --ignore-case to all sorting keys
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The samples in the credential documentation has been updated to
make it clear that we depict what would appear in the .git/config
file, by adding appropriate quotes as needed..
* jk/credential-sample-update:
gitcredentials(7): make shell-snippet example more realistic
gitcredentials(7): clarify quoting of helper examples
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The userdiff patterns for Markdown documents have been added.
* ah/userdiff-markdown:
userdiff: support Markdown
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With the recent tightening of the code that is used to parse
various parts of a URL for use in the credential subsystem, a
hand-edited credential-store file causes the credential helper to
die, which is a bit too harsh to the users. Demote the error
behaviour to just ignore and keep using well-formed lines instead.
* cb/credential-store-ignore-bogus-lines:
credential-store: ignore bogus lines from store file
credential-store: document the file format a bit more
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In error messages that "git switch" mentions its option to create a
new branch, "-b/-B" options were shown, where "-c/-C" options
should be, which has been corrected.
* dl/switch-c-option-in-error-message:
switch: fix errors and comments related to -c and -C
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662f9cf154 (tests: when run in Bash, annotate test failures with file
name/line number, 2020-04-11), introduces a way to report the location
(file:lineno) of a failed test case by traversing the bash callstack.
The implementation requires bash and uses shell arrays and is therefore
protected by a guard but NetBSD sh will still have to parse the function
and therefore will result in:
** t0000-basic.sh ***
./test-lib.sh: 681: Syntax error: Bad substitution
Enclose the bash specific code inside an eval to avoid parsing errors in
the same way than 5826b7b595 (test-lib: check Bash version for '-x'
without using shell arrays, 2019-01-03)
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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3f824e91c8 (t/Makefile: introduce TEST_SHELL_PATH, 2017-12-08) allows for
setting a shell for running the tests, but the generated subtests weren't
updated.
Correct that and while at it update it to use write_script.
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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gitcredentials(7) already mentions several possible invocations that one
can use as the value for credential.helper. However, many people are
not aware that there are other options than a simple credential helper
name, so let's place some explanatory text in the documentation for
credential.helper as well.
We still refer the user to gitcredential(7) for additional explanations
and helpful examples.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In documentation pertaining to autostash behavior, we refer to the
"stash reflog". This description is too low-level as the reflog refers
to an implementation detail of how the stash works and, for end-users,
they do not need to be aware of this at all.
Change references of "stash reflog" to "stash list", which should
provide more accessible terminology for end-users.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The same as js/partial-urlmatch-2.17, built on more recent codebase
to avoid unnecessary merge conflicts.
* js/partial-urlmatch:
credential: handle `credential.<partial-URL>.<key>` again
credential: optionally allow partial URLs in credential_from_url_gently()
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Recent updates broke parsing of "credential.<url>.<key>" where
<url> is not a full URL (e.g. [credential "https://"] helper = ...)
stopped working, which has been corrected.
* js/partial-urlmatch-2.17:
credential: handle `credential.<partial-URL>.<key>` again
credential: optionally allow partial URLs in credential_from_url_gently()
credential: fix grammar
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Some of the files commit-graph subsystem keeps on disk did not
correctly honor the core.sharedRepository settings and some were
left read-write.
* tb/commit-graph-perm-bits:
commit-graph.c: make 'commit-graph-chain's read-only
commit-graph.c: ensure graph layers respect core.sharedRepository
commit-graph.c: write non-split graphs as read-only
lockfile.c: introduce 'hold_lock_file_for_update_mode'
tempfile.c: introduce 'create_tempfile_mode'
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Code cleanup.
* dl/push-recurse-submodules-fix:
push: unset PARSE_OPT_OPTARG for --recurse-submodules
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Code cleanup.
* dl/opt-callback-cleanup:
Use OPT_CALLBACK and OPT_CALLBACK_F
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Test update.
* jk/test-fail-prereqs-fix:
t0000: disable GIT_TEST_FAIL_PREREQS in sub-tests
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brian m. carlson
Junio C Hamano
Carlo Marcelo Arenas Belón
Denton Liu