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pks-t and others added 30 commits August 5, 2026 09:42
The object database supports the ability to write object streams into
it. This functionality is used when we encounter a blob that is larger
than "core.bigFileThreshold" so that we don't have to soak large files
into memory.

As we only ever write large files, the infrastructure doesn't support
specifying any other object type than "blob". This limitation is quite
artificial though: there is no reason why we shouldn't support writing
arbitrary large objects with a stream. While it's very unlikely that we
encounter a huge object other than a blob, users are known to be
creative and sometimes like to inflict pain on themselves by creating
commits or trees that are huge.

Extend the infrastructure to support streaming arbitrary object types.
For now we don't use this functionality anywhere, but it brings us a bit
closer to unify `struct odb_read_stream` and `struct odb_write_stream`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Rename `struct odb_read_stream` to just `struct odb_stream`. This
prepares for unification of the two different types of streams, as these
provide the same functionality with the preceding refactorings.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `struct odb_read_stream` and `struct odb_write_stream` both provide
the same functionality: they allow a caller to read object data from an
arbitrary source. Historically, the only difference was that the read
stream was used to read data out of the object database, whereas the
write stream was used to write data into the object database, but the
interfaces were mostly the same.

Over the preceding commits we have refactored the write stream to have
almost exactly the same interface as the read stream. With these
refactorings we can now easily merge those two streams into a single
interface that's used for both use cases.

While most of the changes are mechanical, there are two sites that need
special mention:

  - "builtin/unpack-objects.c" creates a write stream from compressed
    object data.

  - "odb/streaming.c" creates a write stream from a file descriptor.

Adapting these sites to yield the new stream type requires a couple more
changes. Most importantly, instead of embedding the pointer to the data
in `struct odb_write_stream`, we now allocate a structure that wraps the
new `struct odb_stream` base. Other than that though, the changes are
rather straight forward.

Some of the structures and functions are now somewhat misnamed. These
will be fixed in subsequent commits.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
With the preceding refactorings the `struct read_object_fd_data` is now
somewhat misnamed, as it doesn't only contain the data anymore, but also
the stream itself. Rename the structure to `struct fd_stream` to better
match the new structure.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
With the preceding refactorings the `struct input_zstream_data` is now
somewhat misnamed, as it doesn't only contain the data anymore, but also
the stream itself. Rename the structure to `struct zlib_stream` to
better match the new structure.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Unify the function names to create new streams from different sources so
that they follow a common schema. While at it, document the ownership of
the file descriptor passed to `odb_stream_from_fd()`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a --forked option to "git branch" list mode that lists only
branches whose configured upstream matches <branch>. The argument
can be a ref (e.g. "origin/main", "master"), a remote name like
"origin" for the branch its origin/HEAD points at, or a shell glob
(e.g. "origin/*"), and may be repeated to widen the filter.

It is an ordinary list filter, so it combines with the others:

    git branch --merged origin/main --forked 'origin/*'

lists branches forked from origin that are already merged into
origin/main, and --no-merged inverts the question.

This is the building block for --delete-merged, which deletes the
listed branches once they have landed on their upstream.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
delete_branches() takes separate force and quiet parameters, while
check_branch_commit() takes force. The next commits would grow this
collection further. Replace them with a single unsigned flags argument
and an enum.

Test the FORCE and QUIET bits directly from flags at each use site so
that mutating or forwarding flags cannot leave cached values stale.

No change in behavior.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a skip-unmerged mode to delete_branches() and check_branch_commit()
so a bulk caller can silently skip branches that are not fully merged
and carry on, rather than erroring with the "use 'git branch -D'"
advice that the plain "git branch -d" path emits. Existing callers are
unaffected.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Teach delete_branches() a new mode for the upcoming --delete-merged
caller that checks whether a branch is merged into its upstream without
falling back to HEAD when there is no upstream. Existing callers keep
their current behavior.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
    git branch (--delete-merged <pattern>)... [<branch-pattern>...]

deletes local branches matching the optional branch patterns when their
configured upstream matches one of the --delete-merged arguments and
their tip is reachable from that upstream. The work has already landed
on the upstream they track, so the local copy is no longer needed.

Each <pattern> may name a ref, a remote, or a shell glob. The option can
be repeated to widen the upstream match. Keeping the candidate patterns
as positional arguments lets users bound the set of local branches that
may be deleted independently of the upstream selection.

A branch is not deleted when:

  * it is checked out in any worktree
  * its configured upstream ref no longer exists, since a missing
    upstream is not by itself a sign of integration
  * pushing it to the remote configured by branch.<name>.remote would
    update its upstream, as determined by that remote's configured push
    and fetch refspecs. For example, a local "main" that tracks
    "origin/main" is kept even when remote.pushDefault names a fork.
    Right after a pull it merely looks fully merged.
  * it is the local upstream of a branch that is not being deleted, so
    no branch is deleted out from under stacked work.

A branch whose work is not yet merged into its upstream is silently
skipped, so one unmerged topic does not abort the whole sweep.

Collect protected local upstreams without changing the candidate set
during ref iteration, then remove them after iteration. This makes the
result independent of ref iteration order. If a protected branch's own
upstream is deleted by the same sweep, clear its upstream configuration.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Setting branch.<name>.deleteMerged=false exempts that branch from
"git branch --delete-merged", which is useful for a topic you want
to keep developing after an early round of it has been merged
upstream. Unless --quiet is given, each skip is reported so the
user knows why their topic was kept.

Explicit deletion with "git branch -d" still uses the normal merge
check and ignores this setting.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git branch --dry-run --delete-merged ..." prints one line per ref that
would be deleted without modifying refs or branch configuration.

--dry-run is only meaningful together with --delete-merged and is
rejected otherwise.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
'git diff --relative' running with '--cached' has been corrected to
avoid a segfault when encountering unmerged paths outside the
prefix.

* jk/diff-relative-cached-unmerged:
  diff-lib: add idx/tree sanity check to oneway_diff
  diff: ignore unmerged paths outside prefix with --relative --cached
Two bugs in how 'git rebase' handles skipped 'fixup' and 'squash'
commands have been fixed.  One bug caused an incorrect commit count to
be shown in the template message when multiple commands were skipped,
and another prevented the editor from opening when the final command
in a chain containing 'fixup -c' was skipped.

* pw/rebase-fixup-fixes:
  rebase: remember fixup -c after skipping fixup/squash
  rebase -i: fix counting of fixups after rebase --skip
Object database housekeeping in 'git gc' and 'git maintenance' has
been refactored to be pluggable.  The files-backend-specific logic,
including incremental and geometric repacking as well as object
pruning, has been moved out of the command implementation and into the
files object database source, enabling future alternative object
database backends to implement their own housekeeping services.

* ps/odb-pluggable-housekeeping:
  odb: make optimizations pluggable
  builtin/gc: fix signedness issues in ODB-related functionality
  builtin/gc: refactor ODB optimizations to operate on "files" source
  builtin/gc: introduce `odb_optimize_required()`
  builtin/gc: move geometric repacking into `odb_optimize()`
  builtin/gc: introduce object database optimization options
  builtin/gc: inline config values specific to the "files" backend
  builtin/gc: make repack arguments self-contained
  builtin/gc: extract object database optimizations into separate function
  builtin/gc: move worktree and rerere tasks before object optimizations
  odb: run "pre-auto-gc" hook for all maintenance tasks
  t7900: simplify how we check for maintenance tasks
'git branch -d' has been taught to report when a branch cannot be
deleted because it is being used in an active bisect run.

* rs/branch-delete-bisect-warning:
  branch: report active bisect run when rejecting delete
The image version used by the static-analysis CI job has been bumped
to ubuntu-latest (Ubuntu 24.04), which brings in a newer Coccinelle
version that resolves a severe performance regression.  A false
positive warning from the 'CHECK_ASSERTION_SIDE_EFFECTS' build with
GCC 15 in the Bloom filter code has also been silenced to facilitate
the image upgrade.

* jk/ci-static-analysis-image-bump:
  ci: bump ubuntu image version for static-analysis job
  bloom: silence CHECK_ASSERTION_SIDE_EFFECTS false positive
The alias tests in 't/t0014-alias.sh' have been updated to dynamically
query the list of deprecated commands using 'git
--list-cmds=deprecated' to avoid test failures when running with
'WITH_BREAKING_CHANGES' in a build directory that contains stale
executables of formerly deprecated commands.

* jk/t0014-dynamic-deprecated-cmds:
  t0014: generate deprecated command names dynamically
  t0014: factor out choice of deprecated commands
Git for Windows has been updated to avoid auto-detecting the symlink
type if the target path starts with a slash, preventing NTLM
credential leaks when checking out repositories with crafted
symbolic links pointing to network shares.

* js/mingw-symlink-net-share-leak:
  mingw: skip symlink type auto-detection for network share targets
Signed-off-by: Junio C Hamano <gitster@pobox.com>
I have to scroll down at least three screens in man(1) from the
`migrate` description in order to see the “known limitations” for
it. This is important information since the text says that concurrent
writes can lead to an inconsistent migrated state. Let’s move that text
up to the command description and put it inside a Warning admonition.

This section made sense when it was added in 25a0023 (builtin/refs:
new command to migrate ref storage formats, 2024-06-06); `migrate` was
the only subcommand, and this section was visible from the command
description. A one-page man page. But that is not the case anymore
now that the command has nine subcommands to describe.

Acked-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Acked-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When loading the loose object map via `load_one_loose_object_map()` we
pass in both a repository and the corresponding source. We ultimately
don't really respect the passed-in source though as we instead always
load the map via the common directory. This doesn't make any sense
though, as the function is called in a loop through all sources, and as
such the expectation is that we'll load the map that belongs to the
given source. The consequence is that we'll ignore loose object maps of
any configured alternates.

Fix this bug by instead loading the map via the loose source's path.

Helped-by: Toon Claes <toon@iotcl.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a repository is configured to use a compatibility hash function
then we load the loose object map when we initialize the repository.
This object map provides the mappings between the canonical object hash
and the compatibility object hash.

Loading the object map happens in `repo_set_compat_hash_algo()`, which
calls `repo_read_loose_object_map()` in case the compatibility object
hash is non-zero. This setup sequence has two major downsides:

  - We assume that the primary object database is the "files" object
    database and unconditionally downcast it. This will cause us to BUG
    in case a different object database type was used together with a
    compat hash algorithm.

  - We require the object database to already have been initialized when
    configuring the object database. This means that we must intermix
    configuration of the repository and initialization of its
    sub-structures in a weird way.

Refactor the logic so that we instead load the loose object map via the
"loose" backend, which fixes both of the above issues.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When initializing a repository's object database we have to respect the
GIT_OBJECT_DIRECTORY and GIT_ALTERNATE_OBJECT_DIRECTORIES environment
variables, which can be set by the user to override the default location
of where we write objects to and read objects from.

This is handled in `apply_repository_format()`, which is fine. But in a
subsequent commit we'll have to defer constructing the object database
to a later point in some cases, and that will require a second site
where we call `odb_new()`. And of course, that second site would have to
handle those environment variables, as well.

It would be somewhat awkward to duplicate the logic though. But there's
a better alternative: instead of handling this logic in "setup.c", we
can easily handle environment variables in `odb_new()` itself. This
ensures that object database creation is neatly self-contained, and we
don't have to duplicate any of the logic.

Another benefit is that in a future patch series we plan to move
handling of alternates into the backends themselves [1], and that will
require us to also handle those environment variables in the "files"
backend itself. So moving the logic into the ODB level already gets us
one step closer to that goal.

Refactor the logic accordingly.

[1]: https://lore.kernel.org/git/amLgMqkqxR8mKIbT@pks.im/

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In a subsequent commit we'll make the creation of the on-disk data
structures of an object database pluggable. This will lead to an
in-between state where we have already configured the repository's
object database, but it's not usable yet until we eventually call
`create_object_directory()`.

Lift the call to `odb_new()` out of `apply_repository_format()` so that
callers have more wiggle room with when exactly they call it, and adapt
them accordingly. The only exception is `init_db()`, where we now defer
creating the object database until we call `create_object_database()`.

With this change, initializing and creating the object database on disk
is now neatly encapsulated in a single function, which will make it
easier for a subsequent commit to move creation of the on-disk data
structures into the `struct odb_source` backends.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Introduce a new function that maps an object source's type to a
human-readable name. Use the function to provide better human-readable
error messages for the downcasting functions.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When creating a new "files" object database source we have to create a
couple of directories. These directories are of course specific to this
particular backend, and a different backend may require a setup that is
completely different.

Make the creation of on-disk structures pluggable to accommodate for
this.

Note that there is one exception though: the "objects" directory must
exist in a repository regardless of which backend is in use. If it
doesn't exist then the repository is not treated as a Git repository at
all. Consequently, we create this directory regardless of the backend.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In a subsequent commit we're going to add the first caller to
writev(3p). Introduce a compatibility wrapper for this syscall that we
can use on systems that don't have this syscall.

The syscall exists on modern Unixes like Linux and macOS, and seemingly
even for NonStop according to [1]. It doesn't seem to exist on Windows
though.

[1]: http://nonstoptools.com/manuals/OSS-SystemCalls.pdf
[2]: https://www.gnu.org/software/gnulib/manual/html_node/writev.html

Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
yoichi and others added 30 commits August 27, 2026 10:29
Fix incorrect indentation and reduce nesting. We are going to extend
this function in subsequent commits.

Signed-off-by: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When the user runs 'git checkout bar-topic' without specifying a
remote, and there is no local branch named bar-topic, we try to guess
which remote branch bar-topic refers to, then create a new branch
named bar-topic that tracks the remote branch.

If multiple remotes have a branch named bar-topic, we cannot determine
a single remote.

To make it easier to resolve the ambiguity, provide the names of the
matching remotes for the specified branch name.

To achieve that, add an optional feature to the
`unique_tracking_name()` function that allows the matching remote
names to be exposed to the caller.

Signed-off-by: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When the user runs 'git worktree add ../foo-dir bar-topic' without
specifying a remote, and there is no local branch named bar-topic, we
try to guess which remote branch bar-topic refers to, then create a
new branch named bar-topic that tracks the remote branch.

If multiple remotes have a branch named bar-topic, we silently gave
up, leaving the variable 'branch' intact.  We then entered the
conditional clause 'if (!opts.orphan &&
!lookup_commit_reference_by_name(branch))' and triggered an "invalid
reference" error.  This error message did not provide enough
information to resolve the ambiguity.

When multiple matching branches are found, display a hint and a
descriptive error message and die immediately.

Signed-off-by: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When 'git worktree add <path>' is invoked without <commit-ish> and
with the --guess-remote option (or when worktree.guessRemote is set to
true), it tries to find a remote-tracking branch matching the basename
of <path>.

Currently, the behavior when multiple matches are found is the same as
when no match is found: it falls back to creating a branch from
HEAD. This has been the behavior since 71d6682 (worktree: add
--guess-remote option to add subcommand, 2017-11-29), when the option
was first introduced.

However, if the specified <path> matches any remote-tracking branch,
we infer that the user intended to use one of the remote-tracking
branches as the start-point rather than HEAD. So we abort the creation
of the branch and worktree when there are multiple matches, and
instruct the user to choose the start-point.

Signed-off-by: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The message is overly long and may mislead readers into thinking
there is recourse other than adopting the new workflow.  Clarify
that the message is there merely to help them find a replacement
workflow, and is not offering to reconsider a decision that has
already taken effect.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Given a state in which the cross-references between the worktree and
the repository (specifically worktree/id/gitdir in the main repository
and the .git file in the worktree) are recorded using absolute paths,
setting 'worktree.useRelativePaths=true' and running 'git worktree
repair' within the main worktree converts them to relative paths.

Conversely, given a state in which the cross-references are recorded
using relative paths, one would expect that setting
'worktree.useRelativePaths=false' and running 'git worktree repair'
would convert them to absolute paths. However, they remain as relative
paths.

This is because we incorrectly use read_gitfile_gently(), which always
returns an absolute path. To fix this, introduce read_gitfile_raw(),
which reads the path from the .git file without resolving it to an
absolute path.

Because read_gitfile_raw() does not validate the path with
is_git_directory(), repair_gitfile() performs this validation to
preserve the existing behavior.

Signed-off-by: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The documentation for 'git format-rev' has been updated to use the
[synopsis] block definition on code blocks to properly highlight
placeholders, and a quoting inconsistency in the running text has
been fixed.

* kh/format-rev-doc-synopsis:
  doc: format-rev: use [synopsis] on code block
  doc: format-rev: quote subject placeholder before and after
A heap-use-after-free bug in the object name parsing code when
reporting failures with a relative path to a sparse directory has
been corrected.

* sk/object-name-use-after-free:
  object-name: avoid use-after-free in get_oid_with_context_1()
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The DWIM logic in 'git worktree add' sometimes tried to infer a
remote-tracking branch when an explicit '-b' or '-B' option was
given to create a new branch, causing the explicit branch name to
be ignored, which has been corrected.

* yn/worktree-add-no-dwim-with-b:
  worktree add: shouldn't dwim if -b or -B is given
The object database (odb) API has been refactored to distinguish
between missing objects and corrupt ones by returning more
descriptive error statuses.  Both the packed and loose backends now
faithfully propagate error details using a generic strbuf error
mechanism, removing backend-specific leakage from central lookup
paths.

* ps/odb-generic-corrupt-objects:
  odb: handle `OBJECT_INFO_DIE_IF_CORRUPT` generically
  odb/source: allow `read_object_info()` to bubble up error messages
  odb/source: let callers discern missing and corrupt objects
  odb/source: introduce error status when reading objects
  odb/source-packed: flag known-bad objects as corrupt and not missing
The command line completion (in contrib/) has been taught to handle
the experimental 'git history' command.

* vm/complete-history:
  completion: complete 'git history split' pathspecs
  completion: complete 'git history --update-refs' values
  completion: complete 'git history --empty' values
  completion: add 'git history' subcommands
The object database layer has been simplified by eagerly loading
alternate object directories upon initialization, instead of
deferring it to the first object lookup.  This eliminates the need
for scattered lazy-loading calls throughout the codebase and paves
the way for integrating alternates with the pluggable backends.

* ps/odb-eagerly-load-alternates:
  odb: drop `alternates_db` field
  odb: drop `loaded_alternates` field
  odb: eagerly initialize alternates
  odb: decouple source path comparisons from `the_repository`
  setup: create ref and object databases after config is written
The trailer parsing machinery has been updated to avoid mistaking
lines that begin with a URL (e.g., 'https://...') as trailer lines.
This prevents intended textual URLs from being mangled or mistakenly
treated as metadata keys.

* kh/trailers-no-urls:
  trailers: stop recognizing URLs as trailers
The threshold for geometric repacking to trigger based on loose
object count has been adjusted to match that of 'git gc --auto',
preventing over-aggressive repacking during concurrent writes.

* ps/odb-geometric-repack-loose-threshold:
  odb/files: be less aggressive with geometric repacking
The 'git receive-pack' command has been updated to use a new ODB
transaction interface for writing incoming packfiles, making it more
backend-agnostic.

* jt/receive-pack-pluggable-writes:
  odb/transaction: add transaction interface to write packfiles
  odb: return temporary ODB source when set
  builtin/receive-pack: explicitly pass packfile fd
  builtin/receive-pack: report unpack errors via strbuf
  builtin/receive-pack: lift global state out of unpack()
  builtin/receive-pack: read unpack limit config lazily
  builtin/receive-pack: pass shallow file explicitly
  odb/transaction: add transaction finalize interface
  builtin/receive-pack: properly clean up keep files
The mechanism to generate a packfile corresponding to the result of
a fetch/push has been made pluggable through a set of object
database callback functions, removing hardcoded references to
'pack-objects' and enabling alternative ODBs to serve packfiles
themselves.

* ps/odb-pluggable-pack-generation:
  bundle: generate packfiles via the object database
  bundle: get (mostly) rid of `the_repository`
  builtin/bundle: refactor option handling for progress meter
  send-pack: generate packfiles via the object database
  upload-pack: generate packfiles via the object database
  odb: introduce interface to generate packfiles
The pack-objects command has been updated to record the total bytes
written to pack files in trace2 output, allowing performance
analysis of different compression settings by comparing the
resulting pack sizes.

* fr/pack-objects-trace-pack-bytes:
  pack-objects: trace pack bytes written
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The global variable 'fetch_if_missing' has been moved to a member in
'struct repository', continuing the libification process and
allowing per-repository control (such as for submodules).

* ty/repository-fetch-if-missing:
  repository: move fetch_if_missing into struct repository
A missing preposition in the rerere technical documentation has been
fixed.

* jc/rerere-doc-typofix:
  rerere: technical documentation typofix
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The reftable code has been optimized to avoid an unnecessary
stat/reload of the stack when an addition already holds the
list_file lock, reducing the number of newfstatat syscalls from
linear to constant when writing refs.

* kn/reftable-optimize-reloading:
  reftable/stack: avoid reloading the stack when already locked
  reftable/stack: move list lock to `struct reftable_stack`
  reftable/stack: rename reftable_stack_new_addition()
  reftable/stack: remove `REFTABLE_STACK_NEW_ADDITION_RELOAD`
'git checkout' and 'git worktree add' makes guesses based on a name
of a remote-tracking branch, but does not give an error when such a
remote-tracking branch cannot be uniquely identified, which has
been corrected.

* yn/worktree-ambiguous-remote-advice:
  worktree add: treat multiple matches with --guess-remote as an error
  worktree add: improve message for ambiguous remote branch name
  checkout: improve message for ambiguous remote branch name
  checkout: extract function to display advice for ambiguous remotes
The instructions for deprecated commands emitted by
you_still_use_that() have been reworded to clarify that the removal
decision is final and to provide more assertive guidance on finding
a replacement.

* jc/you-still-use-that:
  you_still_use_that(): reword the instructions
The application of the edited patch in 'git add -e' has been
refactored to use the internal apply API directly, avoiding the need
to spawn a 'git apply' subprocess.

* gr/add-e-use-apply-api:
  builtin/add.c: replace run_command() with direct apply_all_patches() call
The zsh completion script (in 'contrib/') has been updated to
correctly locate the Git command after global options like '-C' by
properly skipping them, similar to how the bash completion does.

* ll/zsh-complete-git-potty-options:
  completion: zsh: support completion after "git -C <path>"
The git worktree repair command failed to rewrite the .git file of
a working tree from a relative path to an absolute path when the
command was run in the working tree itself. The
read_gitfile_gently() function was modified to also return whether
the path originally recorded in the file was absolute, and this new
capability is used to correctly detect such mismatches.

* yn/worktree-repair-relative:
  worktree repair: detect relative path in .git file correctly
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Added styles for eARC display with responsive grid layout and audio feedback optimization.
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