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The next commit will inline the call to `remove_redundant_bitmaps()`
into `write_midx_included_packs()`. Reorder these two functions to avoid
a forward declaration to `remove_redundant_bitmaps()`.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Instead of storing the list of MIDX pack names separately, let's inline
it into the existing_packs struct, further reducing the number of
parameters we have to pass around.
This amounts to adding a new string_list to the existing_packs struct,
and populating it via `existing_packs_collect()`. This is fairly
straightforward to do, since we are already looping over all packs, all
we need to do is:
if (p->multi_pack_index)
string_list_append(&existing->midx_packs, pack_basename(p));
Note, however, that this check *must* come before other conditions where
we discard and do not keep track of a pack, including the condition "if
(!p->pack_local)" immediately below. This is because the existing
routine which collects MIDX pack names does so blindly, and does not
discard, for example, non-local packs.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When writing a new MIDX, repack must determine whether or not there are
any packs in the MIDX it is replacing (if one exists) that are not
somehow represented in the new MIDX (e.g., either by preserving the pack
verbatim, or rolling it up as part of a geometric repack, etc.).
In order to do this, it keeps track of a list of pack names from the
MIDX present in the repository at the start of the repack operation.
Since we manipulate and close the object store, we cannot rely on the
repository's in-core representation of the MIDX, since this is subject
to change and/or go away.
When this behavior was introduced in 5ee86c273b (repack: exclude cruft
pack(s) from the MIDX where possible, 2025-06-23), we maintained an
array of character pointers instead of using a convenience API, such as
string-list.h.
Store the list of MIDX pack names in a string_list, thereby reducing the
number of parameters we have to pass to `midx_has_unknown_packs()`.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The function 'write_midx_included_packs()', which is responsible for
writing a new MIDX with a given set of included packs, currently takes a
list of six arguments.
In order to extract this function out of the builtin, we have to pass
in a few additional parameters, like 'midx_must_contain_cruft' and
'packdir', which are currently declared as static variables within the
builtin/repack.c compilation unit.
Instead of adding additional parameters to `write_midx_included_packs()`
extract out an "opts" struct that names these parameters, and pass a
pointer to that, making it less cumbersome to add additional parameters.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When writing a MIDX, 'git repack' takes a snapshot of the repository's
references and writes the result out to a file, which it then passes to
'git multi-pack-index write' via the '--refs-snapshot'.
This is done in order to make bitmap selections with respect to what we
are packing, thus avoiding a race where an incoming reference update
causes us to try and write a bitmap for a commit not present in the
MIDX.
Extract this functionality out into a new repack-midx.c compilation
unit, and expose the necessary functions via the repack.h API.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that the pack_geometry API is fully factored and isolated from the
rest of the builtin, declare it within repack.h and move its
implementation to "repack-geometry.c" as a separate component.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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For similar reasons as the preceding commit, pass the "packdir" variable
directly to `pack_geometry_remove_redundant()` as a parameter to the
function.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Prepare to move pack_geometry-related APIs to their own compilation unit
by passing in the static "pack_kept_objects" variable directly as a
parameter to the 'pack_geometry_init()' function.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rename functions which work with 'struct pack_geometry' to begin with
"pack_geometry_". While we're at it, change `free_pack_geometry()` to
instead be named `pack_geometry_release()` to match our conventions, and
make clear that that function frees the contents of the struct, not the
memory allocated to hold the struct itself.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that we have properly factored the portion of the builtin which is
responsible for repacking promisor objects, we can move that function
(and associated dependencies) out of the builtin entirely.
Similar to previous extractions, this function is declared in repack.h,
but implemented in a separate repack-promisor.c file. This is done to
separate promisor-specific repacking functionality from generic repack
utilities (like "existing_packs", and "generated_pack" APIs).
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a similar spirit as previous commit(s), pass the "packtmp" variable
to "repack_promisor_objects()" as an explicit parameter of the function,
preparing us to move this function in a following commit.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that we have factored the "generated_pack" API, we can move it to
repack.ch, further slimming down builtin/repack.c.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Repeat what was done in the preceding commit for the
`generated_pack_install()` function, which needs both "packdir" and
"packtmp".
(As an aside, it is somewhat unfortunate that the final three parameters
to this function are all "const char *", making errors like passing
"packdir" and "packtmp" in the wrong order easy. We could define a new
structure here, but that may be too heavy-handed.)
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a similar spirit as previous commits, this function needs to know the
temporary pack prefix, which it currently accesses through the static
"packtmp" variable within builtin/repack.c.
Pass it explicitly as a function parameter to facilitate moving this
function out of builtin/repack.c entirely.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Once all new packs are known to exist, 'repack' installs their contents
from their temporary location into their permanent one. This is a
semi-involved procedure for each pack, since for each extension (e.g.,
".idx", ".pack", ".mtimes", and so on) we have to either:
- adjust the filemode of the temporary file before renaming it into
place, or
- die() if we are missing a non-optional extension, or
- unlink() any existing file for extensions that we did not generate
(e.g., if a non-cruft pack we generated was identical to, say, a
cruft pack which existed at the beginning of the process, we have to
remove the ".mtimes" file).
Extract this procedure into its own function, and call it
"generated_pack_install"(). This will set us up for pulling this
function out of the builtin entirely and making it part of the repack.h
API, which will be done in a future commit.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The name "generated_pack_data" is somewhat redundant, since the contents
of the struct *is* the data associated with the generated pack.
Rename the structure to just "generated_pack", resulting in less awkward
function names, like "generated_pack_has_ext()" which is preferable to
"generated_pack_data_has_ext()".
Rename a few related functions to align with the convention that
functions to do with a struct "S" should be prefixed with "S_".
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The repack builtin defines an API for keeping track of which packs
were found in the repository at the beginning of the repack operation.
This is used to classify what state a pack was in (kept, non-kept, or
cruft), and is also used to mark which packs to delete (or keep) at the
end of a repack operation.
Now that the prerequisite refactoring is complete, this API is isolated
enough that it can be moved out to repack.[ch] and removed from the
builtin entirely.
As a result, some of its functions become static within repack.c,
cleaning up the visible API.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are a couple of spots that cause warnings within the
existing_packs API without DISABLE_SIGN_COMPARE_WARNINGS under
DEVELOPER=1 mode.
In both cases, we have int values that are being compared against size_t
ones. Neither of these two cases are incorrect, and the cast is
completely OK in practice. But both are unnecessary, since:
- in existing_packs_mark_for_deletion_1(), 'hexsz' should be defined as
a size_t anyway, since algop->hexsz is.
- in existing_packs_collect(), 'i' should be defined as a size_t since
it is counting up to the value of a string_list's 'nr' field.
(This patch is a little bit of noise, but I would rather see us squelch
these warnings ahead of moving the existing_packs API into a separate
compilation unit to avoid having to define DISABLE_SIGN_COMPARE_WARNINGS
in repack.c.)
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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builtin/repack.c defines a static "packdir" to instruct pack-objects on
where to write any new packfiles. This is also the directory scanned
when removing any packfiles which were made redundant by the latest
repack.
Prepare to move the "existing_packs_remove_redundant" function to its
own compilation unit by passing in this information as a parameter to
that function.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Extract "remove_redundant_pack()" as generic repack-related
functionality by moving its implementation to the repack.[ch]
compilation unit.
This is a prerequisite to moving the "existing_packs" API, which is one
of the callers of this function. (The remaining caller in the pack
geometry code will eventually move to its own compilation unit as well,
and will likewise rely on this function.)
While moving it over, prefix the function name with "repack_" to
indicate that it belongs to the repack-subsystem.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rename many of the 'struct existing_packs'-related functions according
to the convention introduced in and described by 541204aabe
(Documentation: document naming schema for structs and their functions,
2024-07-30).
Note that some functions which operate over an individual entry in the
list of existing packs are prefixed with "existing_pack_" instead of the
plural form.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that the 'prepare_pack_objects' function no longer refers to
external, static variables, move it out to repack.h as generic
functionality.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The static variable 'delta_base_offset' determines whether or not we
pass the "--delta-base-offset" command-line argument when spawning
pack-objects as a child process. Its introduction dates back to when
repack was rewritten in C, all the way back in a1bbc6c017 (repack:
rewrite the shell script in C, 2013-09-15).
'struct pack_objects_args' was introduced much later on in 4571324b99
(builtin/repack.c: allow configuring cruft pack generation, 2022-05-20),
but did not move the 'delta_base_offset' variable.
Since the 'delta_base_offset' is a property of an individual
pack-objects command, re-introduce that variable as a member of 'struct
pack_objects_args', which will enable further code movement in the
subsequent commits.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A subsequent commit will remove 'delta_base_offset' as a static variable
within builtin/repack.c, and reintroduce it as a member of the 'struct
pack_objects_args'.
As a result, the repack_config callback will need to have both the
cruft- and non-cruft 'struct pack_objects_args's in scope. Introduce a
new 'struct repack_config_ctx' to allow the callee to provide both
pointers to the callback.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Over the years, builtin/repack.c has turned into a grab-bag of
functionality powering the 'git repack' builtin. Among its many
capabilities, it:
- can build and spawn 'git pack-objects' commands, which in turn
generate new packs
- has infrastructure to manage the set of existing packs in a
repository
- has infrastructure to split a sequence of packs into a geometric
progression based on object size
- can manage both generating and combining cruft packs together
- can write new MIDXs
to name a few.
As a result, this builtin has accumulated a lot of code, making adding
new functionality difficult. In the future, 'repack' will learn how to
manage a chain of incremental MIDXs, adding yet more functionality into
the builtin.
As a prerequisite step, let's first move some of the functionality in
the builtin into its own repack.[ch].
This will be done over the course of many steps, since there are many
individual components, some of which will end up in other, yet-to-exist
compilation units of their own. Some of the code movement here is also
non-trivial, so performing it in individual steps will make it easier to
verify.
Let's start by migrating 'struct pack_objects_args' (and the related
corresponding pack_objects_args_release() function) into repack.h, and
teach both the Makefile and Meson how to build the new compilation unit.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In previous commits, we started passing either repository or
git_hash_algo pointers around to various spots within builtin/repack.c
to reduce our dependency on the_repository in the hope of undef'ing
USE_THE_REPOSITORY_VARIABLE.
This commit takes us as far as we can (easily) go in that direction by
removing the only use of a convenience function that only exists when
USE_THE_REPOSITORY_VARIABLE is defined.
Unfortunately, the only other such function is "is_bare_repository()",
which is less than straightforward to convert into, say,
"repo_is_bare()", the latter of the two accepting a repository pointer.
Punt on that for now, and declare this commit as the stopping point for
our efforts in the direction of undef'ing USE_THE_REPOSITORY_VARIABLE.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a similar spirit as previous commits, avoid referring directly to
"the_hash_algo" in builtin/repack.c::finish_pack_objects_cmd() and
instead accept one as a parameter to the function.
Since this function has a number of callers throughout the builtin, the
diff is a little noisier than previous commits. However, each hunk is
limited to passing the hash_algo parameter from a repository pointer
that is already in scope.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a similar spirit as the previous commits, avoid referring directly to
"the_hash_algo" within builtin/repack.c::repack_promisor_objects().
Since there is already a repository pointer in scope, use its hash_algo
value instead.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a similar spirit as the previous commit, avoid referring directly to
"the_hash_algo" within builtin/repack.c::write_oid().
Unlike the previous commit, we are within a callback function, so must
introduce a new struct to pass additional data through its "data"
pointer.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "mark_packs_for_deletion_1" function uses "the_hash_algo->hexsz" to
isolate a pack's checksum before deleting it to avoid deleting a newly
written pack having the same checksum (that is, some generated pack
wound up identical to an existing pack).
Avoid this by passing down a "struct git_hash_algo" pointer, and refer to
the hash algorithm through it instead.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Pass a "struct repository" pointer to the 'repack_promisor_objects()'
function to avoid using "the_repository".
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The 'remove_redundant_pack()' function uses "the_repository" to obtain,
and optionally remove, the repository's MIDX. Instead of relying on
"the_repository", pass around a "struct repository *" parameter through
its callers, and use that instead.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Avoid using "the_repository" in various MIDX-related ref snapshotting
functions.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are a number of spots within builtin/repack.c which refer to
"the_repository", and either make use of the "existing packs" API
or otherwise have a 'struct existing_packs *' in scope.
Add a "repo" member to "struct existing_packs" and use that instead of
"the_repository" in such locations.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Reduce builtin/repack.c's reliance on `the_repository` by using the
currently-UNUSED "repo" parameter within cmd_repack().
The following commits will continue to reduce the usage of
the_repository in other places within builtin/repack.c.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Carry over the fixups from 8c3d7c5f (RelNotes: minor fixups before
2.51.1, 2025-10-15).
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Bumps [actions/github-script](https://github.com/actions/github-script)
from 7 to 8.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](https://github.com/actions/github-script/compare/v7...v8)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Bumps [actions/setup-python](https://github.com/actions/setup-python)
from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v5...v6)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Bumps
[actions/download-artifact](https://github.com/actions/download-artifact)
from 4 to 5.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4...v5)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Update old-style shell path checks to use the modern test
helpers 'test_path_is_file' and 'test_path_is_dir' for improved
runtime diagnosis.
Signed-off-by: Solly <solobarine@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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From user feedback:
- One user is confused about why `git reset --merge`
(why not just `git reset`?). Handle this by mentioning
`git merge --abort` and `git reset --abort` instead, which have a
more obvious meaning.
- 2 users want to know what "In older versions of Git" means exactly
(in versions older than 1.7.0). Handle this by removing the warning
since it was added 15 years ago (in 3f8fc184c0e2c)
Signed-off-by: Julia Evans <julia@jvns.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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From user feedback: this example is confusing because it implies that
`git pull` will run `git merge` by default, but the default is
`--ff-only`.
We could instead show an example of a fast-forward merge, but that may
not add a lot since fast-forward merges are relatively simple. This lets
us keep the description short.
Signed-off-by: Julia Evans <julia@jvns.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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From user feedback:
- One user is confused about the current default ("I was convinced that
the git default was still to merge on pull")
- One user is confused about why "git fetch" isn't mentioned earlier
- One user says they always forget what the arguments to `git pull` are
and that it's not immediately obvious that `--no-rebase` means "merge"
- One user wants `--ff-only` to be mentioned
Resolve this by listing the options for integrating the the remote
branch. This should help users figure out at a glance which one they
want to do, and make it clearer that --ff-only is the default.
Signed-off-by: Julia Evans <julia@jvns.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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From user feedback:
- it's confusing that we use both <branch> and <refspec> to refer to the
second argument
- one user is not clear about what `refs/heads/*:refs/remotes/origin/*`
is meant to be an example of ("is it like a path?")
The DESCRIPTION section is also doing a lot right now: it's trying to
describe both how the <repository> and <refspec> arguments work (which
is pretty complex, as seen in the DEFAULT BEHAVIOUR section)
as well as how `git pull` calls `git fetch` and merge/rebase/etc
depending on the arguments.
Handle this by moving the description of the <repository> and <refspec>
arguments to the OPTIONS section, so that we can focus on the
merge/rebase/etc behaviour in the DESCRIPTION section, and refer folks
to the later sections for details.
Use the term "upstream" instead of 'the "remote" and "merge"
configuration for the current branch' since users are more likely to
know what an "upstream" is.
Signed-off-by: Julia Evans <julia@jvns.ca>
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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Grammar and typo fixes. Also change “work it around” to “work around”.
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "files" backend has the ability to store symbolic refs as symbolic
links, which can be configured via "core.preferSymlinkRefs". This
feature stems back from the early days: the initial implementation of
symbolic refs used symlinks exclusively. The symref format was only
introduced in 9b143c6e15 (Teach update-ref about a symbolic ref stored
in a textfile., 2005-09-25) and made the default in 9f0bb90d16
(core.prefersymlinkrefs: use symlinks for .git/HEAD, 2006-05-02).
This is all about 20 years ago, and there are no known reasons nowadays
why one would want to use symlinks instead of symrefs. Mark the feature
for deprecation in Git 3.0.
Note that this only deprecates _writing_ symrefs as symbolic links.
Reading such symrefs is still supported for now.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The initial patch series that introduced Rust into the core of Git only
cared about macOS and Linux. This specifically leaves out Windows, which
indeed fails to build right now due to two issues:
- The Rust runtime requires `GetUserProfileDirectoryW()`, but we don't
link against "userenv.dll".
- The path of the Rust library built on Windows is different than on
most other systems systems.
Fix both of these issues to support Windows.
Note that this commit fixes the Meson-based job in GitHub's CI. Meson
auto-detects the availability of Rust, and as the Windows runner has
Rust installed by default it already enabled Rust support there. But due
to the above issues that job fails consistently.
Install Rust on GitLab CI, as well, to improve test coverage there.
Based-on-patch-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Based-on-patch-by: Ezekiel Newren <ezekielnewren@gmail.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In the current state of our Rust code base we don't really have any
requirements for the minimum supported Rust version yet, as we don't use
any features introduced by a recent version of Rust. Consequently, we
have decided that we want to aim for a rather old version and edition of
Rust, where the hope is that using an old version will make alternatives
like gccrs viable earlier for compiling Git.
But while we specify the Rust edition, we don't yet specify a Rust
version. And even if we did, the Rust version would only be enforced for
our own code, but not for any of our dependencies.
We don't yet have any dependencies at the current point in time. But
let's add some safeguards by specifying the minimum supported Rust
version and using cargo-msrv(1) to verify that this version can be
satisfied for all of our dependencies.
Note that we fix the version of cargo-msrv(1) at v0.18.1. This is the
latest release supported by Ubuntu's Rust version.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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