"git maintenance" command learned "is-needed" subcommand to tell if
it is necessary to perform various maintenance tasks.

* kn/maintenance-is-needed:
  maintenance: add 'is-needed' subcommand
  maintenance: add checking logic in `pack_refs_condition()`
  refs: add a `optimize_required` field to `struct ref_storage_be`
  reftable/stack: add function to check if optimization is required
  reftable/stack: return stack segments directly

Ever since we added whitespace rules for this project, we misspelt
an entry, which has been corrected.

* jc/gitattributes-whitespace-no-indent-fix:
  .gitattributes: remove misspelled no-op whitespace attribute

The code to expand attribute macros has been rewritten to avoid
recursion to avoid running out of stack space in an uncontrolled
way.

* jk/attr-macroexpand-wo-recursion:
  attr: avoid recursion when expanding attribute macros

Adding a repository that uses a different hash function is a no-no,
but "git submodule add" did nt prevent it, which has been corrected.

* bc/submodule-force-same-hash:
  read-cache: drop submodule check from add_to_cache()
  object-file: disallow adding submodules of different hash algo

"git replay" (experimental) learned to perform ref updates itself
in a transaction by default, instead of emitting where each refs
should point at and leaving the actual update to another command.

* sa/replay-atomic-ref-updates:
  replay: add replay.refAction config option
  replay: make atomic ref updates the default behavior
  replay: use die_for_incompatible_opt2() for option validation

Doc update.

* qj/doc-http-bad-want-response:
  doc: clarify server behavior for invalid 'want' lines in HTTP protocol

A part of code paths that deals with loose objects has been cleaned
up.

* ps/object-source-loose:
  object-file: refactor writing objects via a stream
  object-file: rename `write_object_file()`
  object-file: refactor freshening of objects
  object-file: rename `has_loose_object()`
  object-file: read objects via the loose object source
  object-file: move loose object map into loose source
  object-file: hide internals when we need to reprepare loose sources
  object-file: move loose object cache into loose source
  object-file: introduce `struct odb_source_loose`
  object-file: move `fetch_if_missing`
  odb: adjust naming to free object sources
  odb: introduce `odb_source_new()`
  odb: fix subtle logic to check whether an alternate is usable

Doc update.

* kh/doc-commit-extra-references:
  doc: commit: link to git-status(1) on all format options

An earlier check added to osx keychain credential helper to avoid
storing the credential itself supplied was overeager and rejected
credential material supplied by other helper backends that it would
have wanted to store, which has been corrected.

* kn/osxkeychain-idempotent-store-fix:
  osxkeychain: avoid incorrectly skipping store operation

The "git repo structure" subcommand tried to align its output but
mixed up byte count and display column width, which has been
corrected.

* jx/repo-struct-utf8width-fix:
  builtin/repo: fix table alignment for UTF-8 characters
  t/unit-tests: add UTF-8 width tests for CJK chars

Yet another corner case fix around renames in the "ort" merge
strategy.

* en/ort-rename-another-fix:
  merge-ort: fix failing merges in special corner case
  merge-ort: remove debugging crud
  t6429: update comment to mention correct tool

"git blame" learns "--diff-algorithm=<algo>" option.

* ad/blame-diff-algorithm:
  blame: make diff algorithm configurable
  xdiff: add 'minimal' to XDF_DIFF_ALGORITHM_MASK

Code simplification.

* rs/xmkstemp-simplify:
  wrapper: simplify xmkstemp()

Test leakfix.

* jk/test-mktemp-leakfix:
  test-mktemp: plug memory and descriptor leaks

Update a version of action used at the GitHub Actrions CI.

* js/ci-github-setup-go-update:
  ci: bump actions/setup-go from 5 to 6

The "return errno = EFOO, -1" construct, which is heavily used in
compat/mingw.c and triggers warnings under "-Wcomma", has been
rewritten to avoid the warnings.

* js/mingw-assign-comma-fix:
  mingw: avoid the comma operator

Makefile based build have recently been updated to build a
libgit.a that also has reftable and xdiff objects; CMake based
build procedure has been updated to match.

* js/cmake-libgit-fix:
  cmake: stop trying to build the reftable and xdiff libraries

Under-allocation fix.

* js/wincred-get-credential-alloc-fix:
  wincred: avoid memory corruption

"git worktree list" attempts to show paths to worktrees while
aligning them, but miscounted display columns for the paths when
non-ASCII characters were involved, which has been corrected.

* pw/worktree-list-display-width-fix:
  worktree list: quote paths
  worktree list: fix column spacing

"Windows+meson" job at the GitHub Actions CI was hard to debug, as
it did not show and save failed test artifacts, which has been
corrected.

* jk/ci-windows-meson-test-fix:
  ci(windows-meson-test): handle options and output like other test jobs
  unit-test: ignore --no-chain-lint

"git repo info" learned "--all" option.

* lo/repo-info-all:
  repo: add --all to git-repo-info
  repo: factor out field printing to dedicated function

Doc mark-up updates.

* ja/doc-synopsis-style:
  doc: convert git push to synopsis style
  doc: convert git pull to synopsis style
  doc: convert git fetch to synopsis style

Emulation code clean-up.

* gf/win32-pthread-cond-wait-err:
  win32: return error if SleepConditionVariableCS fails

Doc mark-up updates.

* ja/doc-synopsis-style:
  doc: pull-fetch-param typofix

Both "git apply" and "git diff" learn a new whitespace error class,
"incomplete-line".

* jc/whitespace-incomplete-line:
  attr: enable incomplete-line whitespace error for this project
  diff: highlight and error out on incomplete lines
  apply: check and fix incomplete lines
  whitespace: allocate a few more bits and define WS_INCOMPLETE_LINE
  apply: revamp the parsing of incomplete lines
  diff: update the way rewrite diff handles incomplete lines
  diff: call emit_callback ecbdata everywhere
  diff: refactor output of incomplete line
  diff: keep track of the type of the last line seen
  diff: correct suppress_blank_empty hack
  diff: emit_line_ws_markup() if/else style fix
  whitespace: correct bit assignment comments

Add a new manual that describes the data model.

* je/doc-data-model:
  doc: add an explanation of Git's data model

Various issues detected by Asan have been corrected.

* jk/asan-bonanza:
  t: enable ASan's strict_string_checks option
  fsck: avoid parse_timestamp() on buffer that isn't NUL-terminated
  fsck: remove redundant date timestamp check
  fsck: avoid strcspn() in fsck_ident()
  fsck: assert newline presence in fsck_ident()
  cache-tree: avoid strtol() on non-string buffer
  Makefile: turn on NO_MMAP when building with ASan
  pack-bitmap: handle name-hash lookups in incremental bitmaps
  compat/mmap: mark unused argument in git_munmap()

"make strip" has been taught to strip "scalar" as well as "git".

* js/strip-scalar-too:
  make strip: include `scalar`

"git config get --path" segfaulted on an ":(optional)path" that
does not exist, which has been corrected.

* jc/optional-path:
  config: really treat missing optional path as not configured
  config: really pretend missing :(optional) value is not there
  config: mark otherwise unused function as file-scope static

The "--committer-date-is-author-date" option of "git am/rebase" is
a misguided one.  The documentation is updated to discourage its
use.

* kh/doc-committer-date-is-author-date:
  doc: warn against --committer-date-is-author-date

Dockerised jobs at the GitHub Actions CI have been taught to show
more details of failed tests.

* js/ci-show-breakage-in-dockerized-jobs:
  ci(dockerized): do show the result of failing tests again

"git fast-import" learns "--strip-if-invalid" option to drop
invalid cryptographic signature from objects.

* cc/fast-import-strip-if-invalid:
  fast-import: add 'strip-if-invalid' mode to --signed-commits=<mode>
  commit: refactor verify_commit_buffer()
  fast-import: refactor finalize_commit_buffer()

Code refactoring around object database sources.

* ps/object-source-management:
  odb: handle recreation of quarantine directories
  odb: handle changing a repository's commondir
  chdir-notify: add function to unregister listeners
  odb: handle initialization of sources in `odb_new()`
  http-push: stop setting up `the_repository` for each reference
  t/helper: stop setting up `the_repository` repeatedly
  builtin/index-pack: fix deferred fsck outside repos
  oidset: introduce `oidset_equal()`
  odb: move logic to disable ref updates into repo
  odb: refactor `odb_clear()` to `odb_free()`
  odb: adopt logic to close object databases
  setup: convert `set_git_dir()` to have file scope
  path: move `enter_repo()` into "setup.c"

The option help text given by "git config unset -h" described
the "--all" option to "replace", not "unset", multiple variables,
which has been corrected.

* rs/config-unset-opthelp-fix:
  config: fix short help of unset flags

The error message given by "git config set", when the variable
being updated has more than one values defined, used old style "git
config" syntax with an incorrect option in its hint, both of which
have been corrected.

* rs/config-set-multi-error-message-fix:
  config: fix suggestion for failed set of multi-valued option