Commit Graph

810 Commits (e4981ed1e72d3f25da901b9415d2c4805bed0dbc)

Author SHA1 Message Date
Patrick Steinhardt 41f43b8243 global: mark code units that generate warnings with `-Wsign-compare`
Mark code units that generate warnings with `-Wsign-compare`. This
allows for a structured approach to get rid of all such warnings over
time in a way that can be easily measured.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-12-06 20:20:02 +09:00
Taylor Blau 6ca9a05e63 Merge branch 'ps/cache-tree-w-broken-index-entry'
Fail gracefully instead of crashing when attempting to write the
contents of a corrupt in-core index as a tree object.

* ps/cache-tree-w-broken-index-entry:
  unpack-trees: detect mismatching number of cache-tree/index entries
  cache-tree: detect mismatching number of index entries
  cache-tree: refactor verification to return error codes
2024-10-22 14:40:38 -04:00
Junio C Hamano 31bc4454de Merge branch 'ps/leakfixes-part-8'
More leakfixes.

* ps/leakfixes-part-8: (23 commits)
  builtin/send-pack: fix leaking list of push options
  remote: fix leaking push reports
  t/helper: fix leaks in proc-receive helper
  pack-write: fix return parameter of `write_rev_file_order()`
  revision: fix leaking saved parents
  revision: fix memory leaks when rewriting parents
  midx-write: fix leaking buffer
  pack-bitmap-write: fix leaking OID array
  pseudo-merge: fix leaking strmap keys
  pseudo-merge: fix various memory leaks
  line-log: fix several memory leaks
  diff: improve lifecycle management of diff queues
  builtin/revert: fix leaking `gpg_sign` and `strategy` config
  t/helper: fix leaking repository in partial-clone helper
  builtin/clone: fix leaking repo state when cloning with bundle URIs
  builtin/pack-redundant: fix various memory leaks
  builtin/stash: fix leaking `pathspec_from_file`
  submodule: fix leaking submodule entry list
  wt-status: fix leaking buffer with sparse directories
  shell: fix leaking strings
  ...
2024-10-10 14:22:29 -07:00
Patrick Steinhardt 9f119599a6 cache-tree: refactor verification to return error codes
The function `cache_tree_verify()` will `BUG()` whenever it finds that
the cache-tree extension of the index is corrupt. The function is thus
inherently untestable because the resulting call to `abort()` will be
detected by our testing framework and labelled an error. And rightfully
so: it shouldn't ever be possible to hit bugs, as they should indicate a
programming error rather than corruption of on-disk state.

Refactor the function to instead return error codes. This also ensures
that the function can be used e.g. by git-fsck(1) without the whole
process dying. Furthermore, this refactoring plugs some memory leaks
when returning early by creating a common exit path.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-10-07 15:08:11 -07:00
Junio C Hamano b4efdfe165 Merge branch 'ds/read-cache-mempool-leakfix'
Leakfix.

* ds/read-cache-mempool-leakfix:
  read-cache: free threaded memory pool
2024-10-04 10:14:07 -07:00
Derrick Stolee 5e6f359f6b read-cache: free threaded memory pool
In load_cache_entries_threaded(), each thread allocates its own memory
pool. This pool needs to be cleaned up while closing the threads down,
or it will be leaked.

This ce_mem_pool pointer could theoretically be converted to an inline
copy of the struct, but the use of a pointer helps with existing lazy-
initialization logic. Adjusting that behavior only to avoid this pointer
would be a much bigger change.

Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-10-01 11:51:15 -07:00
Patrick Steinhardt a69d120c07 read-cache: fix leaking hash context in `do_write_index()`
When writing an index with the EOIE extension we allocate a separate
hash context. We never free that context though, causing a memory leak.
Plug it.

This leak is exposed by t9210, but plugging it alone does not make the
whole test suite pass.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-09-30 11:23:02 -07:00
Patrick Steinhardt 246deeac95 environment: make `get_git_dir()` accept a repository
The `get_git_dir()` function retrieves the path to the Git directory for
`the_repository`. Make it accept a `struct repository` such that it can
work on arbitrary repositories and make it part of the repository
subsystem. This reduces our reliance on `the_repository` and clarifies
scope.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-09-12 10:15:39 -07:00
Junio C Hamano 1e8962ee08 Merge branch 'ps/maintenance-detach-fix'
Maintenance tasks other than "gc" now properly go background when
"git maintenance" runs them.

* ps/maintenance-detach-fix:
  run-command: fix detaching when running auto maintenance
  builtin/maintenance: add a `--detach` flag
  builtin/gc: add a `--detach` flag
  builtin/gc: stop processing log file on signal
  builtin/gc: fix leaking config values
  builtin/gc: refactor to read config into structure
  config: fix constness of out parameter for `git_config_get_expiry()`
2024-08-26 11:32:20 -07:00
Junio C Hamano 5e56a39e6a Merge branch 'ps/config-wo-the-repository'
Use of API functions that implicitly depend on the_repository
object in the config subsystem has been rewritten to pass a
repository object through the callchain.

* ps/config-wo-the-repository:
  config: hide functions using `the_repository` by default
  global: prepare for hiding away repo-less config functions
  config: don't depend on `the_repository` with branch conditions
  config: don't have setters depend on `the_repository`
  config: pass repo to functions that rename or copy sections
  config: pass repo to `git_die_config()`
  config: pass repo to `git_config_get_expiry_in_days()`
  config: pass repo to `git_config_get_expiry()`
  config: pass repo to `git_config_get_max_percent_split_change()`
  config: pass repo to `git_config_get_split_index()`
  config: pass repo to `git_config_get_index_threads()`
  config: expose `repo_config_clear()`
  config: introduce missing setters that take repo as parameter
  path: hide functions using `the_repository` by default
  path: stop relying on `the_repository` in `worktree_git_path()`
  path: stop relying on `the_repository` when reporting garbage
  hooks: remove implicit dependency on `the_repository`
  editor: do not rely on `the_repository` for interactive edits
  path: expose `do_git_common_path()` as `repo_common_pathv()`
  path: expose `do_git_path()` as `repo_git_pathv()`
2024-08-23 09:02:34 -07:00
Patrick Steinhardt a70a9bf6ee config: fix constness of out parameter for `git_config_get_expiry()`
The type of the out parameter of `git_config_get_expiry()` is a pointer
to a constant string, which creates the impression that ownership of the
returned data wasn't transferred to the caller. This isn't true though
and thus quite misleading.

Adapt the parameter to be of type `char **` and adjust callers
accordingly. While at it, refactor `get_shared_index_expire_date()` to
drop the static `shared_index_expire` variable. It is only used in that
function, and furthermore we would only hit the code where we parse the
expiry date a single time because we already use a static `prepared`
variable to track whether we did parse it.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-16 09:46:24 -07:00
Patrick Steinhardt d1c53f6703 read-cache: fix leaking hashfile when writing index fails
In `do_write_index()`, we use a `struct hashfile` to write the index
with a trailer hash. In case the write fails though, we never clean up
the allocated `hashfile` state and thus leak memory.

Refactor the code to have a common exit path where we can free this and
other allocated memory. While at it, refactor our use of `strbuf`s such
that we reuse the same buffer to avoid some unneeded allocations.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-14 10:07:58 -07:00
Patrick Steinhardt 87aace129e config: pass repo to `git_config_get_expiry()`
Refactor `git_config_get_expiry()` to accept a `struct repository` such
that we can get rid of the implicit dependency on `the_repository`.
Rename the function accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-13 10:01:03 -07:00
Patrick Steinhardt d8b772182c config: pass repo to `git_config_get_max_percent_split_change()`
Refactor `git_config_get_max_percent_split_change()` to accept a `struct
repository` such that we can get rid of the implicit dependency on
`the_repository`. Rename the function accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-13 10:01:03 -07:00
Patrick Steinhardt be7537e6a9 config: pass repo to `git_config_get_split_index()`
Refactor `git_config_get_split_index()` to accept a `struct repository`
such that we can get rid of the implicit dependency on `the_repository`.
Rename the function accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-13 10:01:03 -07:00
Patrick Steinhardt 1870cc30d4 config: pass repo to `git_config_get_index_threads()`
Refactor `git_config_get_index_threads()` to accept a `struct
repository` such that we can get rid of the implicit dependency on
`the_repository`. Rename the function accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-13 10:01:02 -07:00
Patrick Steinhardt 169c979771 hooks: remove implicit dependency on `the_repository`
We implicitly depend on `the_repository` in our hook subsystem because
we use `strbuf_git_path()` to compute hook paths. Remove this dependency
by accepting a `struct repository` as parameter instead.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-08-13 10:01:01 -07:00
Patrick Steinhardt e7da938570 global: introduce `USE_THE_REPOSITORY_VARIABLE` macro
Use of the `the_repository` variable is deprecated nowadays, and we
slowly but steadily convert the codebase to not use it anymore. Instead,
callers should be passing down the repository to work on via parameters.

It is hard though to prove that a given code unit does not use this
variable anymore. The most trivial case, merely demonstrating that there
is no direct use of `the_repository`, is already a bit of a pain during
code reviews as the reviewer needs to manually verify claims made by the
patch author. The bigger problem though is that we have many interfaces
that implicitly rely on `the_repository`.

Introduce a new `USE_THE_REPOSITORY_VARIABLE` macro that allows code
units to opt into usage of `the_repository`. The intent of this macro is
to demonstrate that a certain code unit does not use this variable
anymore, and to keep it from new dependencies on it in future changes,
be it explicit or implicit

For now, the macro only guards `the_repository` itself as well as
`the_hash_algo`. There are many more known interfaces where we have an
implicit dependency on `the_repository`, but those are not guarded at
the current point in time. Over time though, we should start to add
guards as required (or even better, just remove them).

Define the macro as required in our code units. As expected, most of our
code still relies on the global variable. Nearly all of our builtins
rely on the variable as there is no way yet to pass `the_repository` to
their entry point. For now, declare the macro in "biultin.h" to keep the
required changes at least a little bit more contained.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-14 10:26:33 -07:00
Patrick Steinhardt 9c34eb93fb hash: require hash algorithm in `is_empty_{blob,tree}_oid()`
Both functions `is_empty_{blob,tree}_oid()` use `the_repository` to
derive the hash function that shall be used. Require callers to pass in
the hash algorithm to get rid of this implicit dependency.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-14 10:26:33 -07:00
Patrick Steinhardt 9da95bda74 hash: require hash algorithm in `oidread()` and `oidclr()`
Both `oidread()` and `oidclr()` use `the_repository` to derive the hash
function that shall be used. Require callers to pass in the hash
algorithm to get rid of this implicit dependency.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-14 10:26:32 -07:00
Patrick Steinhardt f4836570a7 hash: require hash algorithm in `hasheq()`, `hashcmp()` and `hashclr()`
Many of our hash functions have two variants, one receiving a `struct
git_hash_algo` and one that derives it via `the_repository`. Adapt all
of those functions to always require the hash algorithm as input and
drop the variants that do not accept one.

As those functions are now independent of `the_repository`, we can move
them from "hash.h" to "hash-ll.h".

Note that both in this and subsequent commits in this series we always
just pass `the_repository->hash_algo` as input even if it is obvious
that there is a repository in the context that we should be using the
hash from instead. This is done to be on the safe side and not introduce
any regressions. All callsites should eventually be amended to use a
repo passed via parameters, but this is outside the scope of this patch
series.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-14 10:26:32 -07:00
Patrick Steinhardt 129cb1b99d hash: drop (mostly) unused `is_empty_{blob,tree}_sha1()` functions
The functions `is_empty_{blob,tree}_sha1()` are mostly unused, except
for a single callsite in "read-cache.c". Most callsites have long since
been converted to use the equivalents that accept a `struct object_id`
instead of a string.

Adapt the remaining callsite and drop those functions.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-14 10:26:32 -07:00
Patrick Steinhardt e19488a60a refs: refactor `resolve_gitlink_ref()` to accept a repository
In `resolve_gitlink_ref()` we implicitly rely on `the_repository` to
look up the submodule ref store. Now that we can look up submodule ref
stores for arbitrary repositories we can improve this function to
instead accept a repository as parameter for which we want to resolve
the gitlink.

Do so and adjust callers accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-05-17 10:33:38 -07:00
Johannes Schindelin 1c00f92eb5 Sync with 2.44.1
* maint-2.44: (41 commits)
  Git 2.44.1
  Git 2.43.4
  Git 2.42.2
  Git 2.41.1
  Git 2.40.2
  Git 2.39.4
  fsck: warn about symlink pointing inside a gitdir
  core.hooksPath: add some protection while cloning
  init.templateDir: consider this config setting protected
  clone: prevent hooks from running during a clone
  Add a helper function to compare file contents
  init: refactor the template directory discovery into its own function
  find_hook(): refactor the `STRIP_EXTENSION` logic
  clone: when symbolic links collide with directories, keep the latter
  entry: report more colliding paths
  t5510: verify that D/F confusion cannot lead to an RCE
  submodule: require the submodule path to contain directories only
  clone_submodule: avoid using `access()` on directories
  submodules: submodule paths must not contain symlinks
  clone: prevent clashing git dirs when cloning submodule in parallel
  ...
2024-04-29 20:42:30 +02:00
Johannes Schindelin e5e6663e69 Sync with 2.43.4
* maint-2.43: (40 commits)
  Git 2.43.4
  Git 2.42.2
  Git 2.41.1
  Git 2.40.2
  Git 2.39.4
  fsck: warn about symlink pointing inside a gitdir
  core.hooksPath: add some protection while cloning
  init.templateDir: consider this config setting protected
  clone: prevent hooks from running during a clone
  Add a helper function to compare file contents
  init: refactor the template directory discovery into its own function
  find_hook(): refactor the `STRIP_EXTENSION` logic
  clone: when symbolic links collide with directories, keep the latter
  entry: report more colliding paths
  t5510: verify that D/F confusion cannot lead to an RCE
  submodule: require the submodule path to contain directories only
  clone_submodule: avoid using `access()` on directories
  submodules: submodule paths must not contain symlinks
  clone: prevent clashing git dirs when cloning submodule in parallel
  t7423: add tests for symlinked submodule directories
  ...
2024-04-19 12:38:54 +02:00
Johannes Schindelin 8e97ec3662 Sync with 2.42.2
* maint-2.42: (39 commits)
  Git 2.42.2
  Git 2.41.1
  Git 2.40.2
  Git 2.39.4
  fsck: warn about symlink pointing inside a gitdir
  core.hooksPath: add some protection while cloning
  init.templateDir: consider this config setting protected
  clone: prevent hooks from running during a clone
  Add a helper function to compare file contents
  init: refactor the template directory discovery into its own function
  find_hook(): refactor the `STRIP_EXTENSION` logic
  clone: when symbolic links collide with directories, keep the latter
  entry: report more colliding paths
  t5510: verify that D/F confusion cannot lead to an RCE
  submodule: require the submodule path to contain directories only
  clone_submodule: avoid using `access()` on directories
  submodules: submodule paths must not contain symlinks
  clone: prevent clashing git dirs when cloning submodule in parallel
  t7423: add tests for symlinked submodule directories
  has_dir_name(): do not get confused by characters < '/'
  ...
2024-04-19 12:38:50 +02:00
Johannes Schindelin be348e9815 Sync with 2.41.1
* maint-2.41: (38 commits)
  Git 2.41.1
  Git 2.40.2
  Git 2.39.4
  fsck: warn about symlink pointing inside a gitdir
  core.hooksPath: add some protection while cloning
  init.templateDir: consider this config setting protected
  clone: prevent hooks from running during a clone
  Add a helper function to compare file contents
  init: refactor the template directory discovery into its own function
  find_hook(): refactor the `STRIP_EXTENSION` logic
  clone: when symbolic links collide with directories, keep the latter
  entry: report more colliding paths
  t5510: verify that D/F confusion cannot lead to an RCE
  submodule: require the submodule path to contain directories only
  clone_submodule: avoid using `access()` on directories
  submodules: submodule paths must not contain symlinks
  clone: prevent clashing git dirs when cloning submodule in parallel
  t7423: add tests for symlinked submodule directories
  has_dir_name(): do not get confused by characters < '/'
  docs: document security issues around untrusted .git dirs
  ...
2024-04-19 12:38:46 +02:00
Johannes Schindelin f5b2af06f5 Sync with 2.40.2
* maint-2.40: (39 commits)
  Git 2.40.2
  Git 2.39.4
  fsck: warn about symlink pointing inside a gitdir
  core.hooksPath: add some protection while cloning
  init.templateDir: consider this config setting protected
  clone: prevent hooks from running during a clone
  Add a helper function to compare file contents
  init: refactor the template directory discovery into its own function
  find_hook(): refactor the `STRIP_EXTENSION` logic
  clone: when symbolic links collide with directories, keep the latter
  entry: report more colliding paths
  t5510: verify that D/F confusion cannot lead to an RCE
  submodule: require the submodule path to contain directories only
  clone_submodule: avoid using `access()` on directories
  submodules: submodule paths must not contain symlinks
  clone: prevent clashing git dirs when cloning submodule in parallel
  t7423: add tests for symlinked submodule directories
  has_dir_name(): do not get confused by characters < '/'
  docs: document security issues around untrusted .git dirs
  upload-pack: disable lazy-fetching by default
  ...
2024-04-19 12:38:42 +02:00
Johannes Schindelin 93a88f42db Sync with 2.39.4
* maint-2.39: (38 commits)
  Git 2.39.4
  fsck: warn about symlink pointing inside a gitdir
  core.hooksPath: add some protection while cloning
  init.templateDir: consider this config setting protected
  clone: prevent hooks from running during a clone
  Add a helper function to compare file contents
  init: refactor the template directory discovery into its own function
  find_hook(): refactor the `STRIP_EXTENSION` logic
  clone: when symbolic links collide with directories, keep the latter
  entry: report more colliding paths
  t5510: verify that D/F confusion cannot lead to an RCE
  submodule: require the submodule path to contain directories only
  clone_submodule: avoid using `access()` on directories
  submodules: submodule paths must not contain symlinks
  clone: prevent clashing git dirs when cloning submodule in parallel
  t7423: add tests for symlinked submodule directories
  has_dir_name(): do not get confused by characters < '/'
  docs: document security issues around untrusted .git dirs
  upload-pack: disable lazy-fetching by default
  fetch/clone: detect dubious ownership of local repositories
  ...
2024-04-19 12:38:37 +02:00
Filip Hejsek c30a574a0b has_dir_name(): do not get confused by characters < '/'
There is a bug in directory/file ("D/F") conflict checking optimization:
It assumes that such a conflict cannot happen if a newly added entry's
path is lexicgraphically "greater than" the last already-existing index
entry _and_ contains a directory separator that comes strictly after the
common prefix (`len > len_eq_offset`).

This assumption is incorrect, though: `a-` sorts _between_ `a` and
`a/b`, their common prefix is `a`, the slash comes after the common
prefix, and there is still a file/directory conflict.

Let's re-design this logic, taking these facts into consideration:

- It is impossible for a file to sort after another file with whose
  directory it conflicts because the trailing NUL byte is always smaller
  than any other character.

- Since there are quite a number of ASCII characters that sort before
  the slash (e.g. `-`, `.`, the space character), looking at the last
  already-existing index entry is not enough to determine whether there
  is a D/F conflict when the first character different from the
  existing last index entry's path is a slash.

  If it is not a slash, there cannot be a file/directory conflict.

  And if the existing index entry's first different character is a
  slash, it also cannot be a file/directory conflict because the
  optimization requires the newly-added entry's path to sort _after_ the
  existing entry's, and the conflicting file's path would not.

So let's fall back to the regular binary search whenever the newly-added
item's path differs in a slash character. If it does not, and it sorts
after the last index entry, there is no D/F conflict and the new index
entry can be safely appended.

This fix also nicely simplifies the logic and makes it much easier to
reason about, while the impact on performance should be negligible:
After this fix, the optimization will be skipped only when index
entry's paths differ in a slash and a space, `!`,  `"`,  `#`,  `$`,
`%`, `&`,  `'`,  | (  `)`,  `*`,  `+`,  `,`,  `-`, or  `.`, which should
be a rare situation.

Signed-off-by: Filip Hejsek <filip.hejsek@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2024-04-17 22:29:58 +02:00
Junio C Hamano 86829f3f3e revision: optionally record matches with pathspec elements
Unlike "git add" and other end-user facing commands, where it is
diagnosed as an error to give a pathspec with an element that does
not match any path, the diff machinery does not care if some
elements of the pathspec do not match.  Given that the diff
machinery is heavily used in pathspec-limited "git log" machinery,
and it is common for a path to come and go while traversing the
project history, this is usually a good thing.

However, in some cases we would want to know if all the pathspec
elements matched.  For example, "git add -u <pathspec>" internally
uses the machinery used by "git diff-files" to decide contents from
what paths to add to the index, and as an end-user facing command,
"git add -u" would want to report an unmatched pathspec element.

Add a new .ps_matched member next to the .prune_data member in
"struct rev_info" so that we can optionally keep track of the use of
.prune_data pathspec elements that can be inspected by the caller.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-04-03 14:55:21 -07:00
Junio C Hamano 492ee03f60 Merge branch 'en/header-cleanup'
Remove unused header "#include".

* en/header-cleanup:
  treewide: remove unnecessary includes in source files
  treewide: add direct includes currently only pulled in transitively
  trace2/tr2_tls.h: remove unnecessary include
  submodule-config.h: remove unnecessary include
  pkt-line.h: remove unnecessary include
  line-log.h: remove unnecessary include
  http.h: remove unnecessary include
  fsmonitor--daemon.h: remove unnecessary includes
  blame.h: remove unnecessary includes
  archive.h: remove unnecessary include
  treewide: remove unnecessary includes in source files
  treewide: remove unnecessary includes from header files
2024-01-08 14:05:15 -08:00
Elijah Newren eea0e59ffb treewide: remove unnecessary includes in source files
Each of these were checked with
   gcc -E -I. ${SOURCE_FILE} | grep ${HEADER_FILE}
to ensure that removing the direct inclusion of the header actually
resulted in that header no longer being included at all (i.e. that
no other header pulled it in transitively).

...except for a few cases where we verified that although the header
was brought in transitively, nothing from it was directly used in
that source file.  These cases were:
  * builtin/credential-cache.c
  * builtin/pull.c
  * builtin/send-pack.c

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-12-26 12:04:31 -08:00
Junio C Hamano c33fa871a5 cache: add fake_lstat()
At times, we may already know that a path represented by a
cache_entry ce has no changes via some out-of-line means, like
fsmonitor, and yet need the control to go through a codepath that
requires us to have "struct stat" obtained by lstat() on the path,
for various purposes (e.g. "ie_match_stat()" wants cached stat-info
is still current wrt "struct stat", "diff" wants to know st_mode).

The callers of lstat() on a tracked file, when its cache_entry knows
it is up-to-date, can instead call this helper to pretend that it
called lstat() by faking the "struct stat" information.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-09-15 17:08:46 -07:00
Junio C Hamano ce481ac8b3 Merge branch 'cw/compat-util-header-cleanup'
Further shuffling of declarations across header files to streamline
file dependencies.

* cw/compat-util-header-cleanup:
  git-compat-util: move alloc macros to git-compat-util.h
  treewide: remove unnecessary includes for wrapper.h
  kwset: move translation table from ctype
  sane-ctype.h: create header for sane-ctype macros
  git-compat-util: move wrapper.c funcs to its header
  git-compat-util: move strbuf.c funcs to its header
2023-07-17 11:30:42 -07:00
Junio C Hamano 7f5ad0ca8d Merge branch 'js/empty-index-fixes'
A few places failed to differenciate the case where the index is
truly empty (nothing added) and we haven't yet read from the
on-disk index file, which have been corrected.

* js/empty-index-fixes:
  commit -a -m: allow the top-level tree to become empty again
  split-index: accept that a base index can be empty
  do_read_index(): always mark index as initialized unless erroring out
2023-07-08 11:23:07 -07:00
Calvin Wan 91c080dff5 git-compat-util: move alloc macros to git-compat-util.h
alloc_nr, ALLOC_GROW, and ALLOC_GROW_BY are commonly used macros for
dynamic array allocation. Moving these macros to git-compat-util.h with
the other alloc macros focuses alloc.[ch] to allocation for Git objects
and additionally allows us to remove inclusions to alloc.h from files
that solely used the above macros.

Signed-off-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-07-05 11:42:31 -07:00
Calvin Wan da9502ff4d treewide: remove unnecessary includes for wrapper.h
Signed-off-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-07-05 11:41:59 -07:00
Johannes Schindelin 7667f4f0a3 split-index: accept that a base index can be empty
We are about to fix an ancient bug where `do_read_index()` pretended
that the index was not initialized when there are no index entries.

Before the `index_state` structure gained the `initialized` flag in
913e0e99b6 (unpack_trees(): protect the handcrafted in-core index from
read_cache(), 2008-08-23), that was the best we could do (even if it was
incorrect: it is totally possible to read a Git index file that contains
no index entries).

This pattern was repeated also in 998330ac2e (read-cache: look for
shared index files next to the index, too, 2021-08-26), which we fix
here by _not_ mistaking an empty base index for a missing
`sharedindex.*` file.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-29 12:20:04 -07:00
Johannes Schindelin 866b43e644 do_read_index(): always mark index as initialized unless erroring out
In 913e0e99b6 (unpack_trees(): protect the handcrafted in-core index
from read_cache(), 2008-08-23) a flag was introduced into the
`index_state` structure to indicate whether it had been initialized (or
more correctly: read and parsed).

There was one code path that was not handled, though: when the index
file does not yet exist (but the `must_exist` parameter is set to 0 to
indicate that that's okay). In this instance, Git wants to go forward
with a new, pristine Git index, almost as if the file had existed and
contained no index entries or extensions.

Since Git wants to handle this situation the same as if an "empty" Git
index file existed, let's set the `initialized` flag also in that case.

This is necessary to prepare for fixing the bug where the condition
`cache_nr == 0` is incorrectly used as an indicator that the index was
already read, and the condition `initialized != 0` needs to be used
instead.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-29 12:20:04 -07:00
Elijah Newren a034e9106f object-store-ll.h: split this header out of object-store.h
The vast majority of files including object-store.h did not need dir.h
nor khash.h.  Split the header into two files, and let most just depend
upon object-store-ll.h, while letting the two callers that need it
depend on the full object-store.h.

After this patch:
    $ git grep -h include..object-store | sort | uniq -c
          2 #include "object-store.h"
        129 #include "object-store-ll.h"

Diff best viewed with `--color-moved`.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:54 -07:00
Elijah Newren c339932bd8 repository: remove unnecessary include of path.h
This also made it clear that several .c files that depended upon path.h
were missing a #include for it; add the missing includes while at it.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren bc5c5ec044 cache.h: remove this no-longer-used header
Since this header showed up in some places besides just #include
statements, update/clean-up/remove those other places as well.

Note that compat/fsmonitor/fsm-path-utils-darwin.c previously got
away with violating the rule that all files must start with an include
of git-compat-util.h (or a short-list of alternate headers that happen
to include it first).  This change exposed the violation and caused it
to stop building correctly; fix it by having it include
git-compat-util.h first, as per policy.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren 08c46a499a read-cache*.h: move declarations for read-cache.c functions from cache.h
For the functions defined in read-cache.c, move their declarations from
cache.h to a new header, read-cache-ll.h.  Also move some related inline
functions from cache.h to read-cache.h.  The purpose of the
read-cache-ll.h/read-cache.h split is that about 70% of the sites don't
need the inline functions and the extra headers they include.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren fbffdfb11c preload-index.h: move declarations for preload-index.c from elsewhere
We already have a preload-index.c file; move the declarations for the
functions in that file into a new preload-index.h.  These were
previously split between cache.h and repository.h.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren f5653856c2 name-hash.h: move declarations for name-hash.c from cache.h
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren 90cbae9ce5 statinfo: move stat_{data,validity} functions from cache/read-cache
These functions do not depend upon struct cache_entry or struct
index_state in any way, and it seems more logical to break them out into
this file, especially since statinfo.h already has the struct stat_data
declaration.

Diff best viewed with `--color-moved`.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren 6cee5ebc7a read-cache: move shared add/checkout/commit code
The function add_files_to_cache(), plus associated helper functions,
were defined in builtin/add.c, but also shared with builtin/checkout.c
and builtin/commit.c.  Move these shared functions to read-cache.c.

Diff best viewed with `--color-moved`.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Elijah Newren 1a40e7be6c read-cache: move shared commit and ls-files code
The function overlay_tree_on_index(), plus associated helper functions,
were defined in builtin/ls-files.c, but also shared with
builtin/commit.c.  Move these shared functions to read-cache.c.

Diff best viewed with `--color-moved`.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-06-21 13:39:53 -07:00
Junio C Hamano ccd12a3d6c Merge branch 'en/header-split-cache-h-part-2'
More header clean-up.

* en/header-split-cache-h-part-2: (22 commits)
  reftable: ensure git-compat-util.h is the first (indirect) include
  diff.h: reduce unnecessary includes
  object-store.h: reduce unnecessary includes
  commit.h: reduce unnecessary includes
  fsmonitor: reduce includes of cache.h
  cache.h: remove unnecessary headers
  treewide: remove cache.h inclusion due to previous changes
  cache,tree: move basic name compare functions from read-cache to tree
  cache,tree: move cmp_cache_name_compare from tree.[ch] to read-cache.c
  hash-ll.h: split out of hash.h to remove dependency on repository.h
  tree-diff.c: move S_DIFFTREE_IFXMIN_NEQ define from cache.h
  dir.h: move DTYPE defines from cache.h
  versioncmp.h: move declarations for versioncmp.c functions from cache.h
  ws.h: move declarations for ws.c functions from cache.h
  match-trees.h: move declarations for match-trees.c functions from cache.h
  pkt-line.h: move declarations for pkt-line.c functions from cache.h
  base85.h: move declarations for base85.c functions from cache.h
  copy.h: move declarations for copy.c functions from cache.h
  server-info.h: move declarations for server-info.c functions from cache.h
  packfile.h: move pack_window and pack_entry from cache.h
  ...
2023-05-09 16:45:46 -07:00