git/repository.h
Junio C Hamano ecf7fc600a Merge branch 'tb/path-filter-fix'
The Bloom filter used for path limited history traversal was broken
on systems whose "char" is unsigned; update the implementation and
bump the format version to 2.

* tb/path-filter-fix:
  bloom: introduce `deinit_bloom_filters()`
  commit-graph: reuse existing Bloom filters where possible
  object.h: fix mis-aligned flag bits table
  commit-graph: new Bloom filter version that fixes murmur3
  commit-graph: unconditionally load Bloom filters
  bloom: prepare to discard incompatible Bloom filters
  bloom: annotate filters with hash version
  repo-settings: introduce commitgraph.changedPathsVersion
  t4216: test changed path filters with high bit paths
  t/helper/test-read-graph: implement `bloom-filters` mode
  bloom.h: make `load_bloom_filter_from_graph()` public
  t/helper/test-read-graph.c: extract `dump_graph_info()`
  gitformat-commit-graph: describe version 2 of BDAT
  commit-graph: ensure Bloom filters are read with consistent settings
  revision.c: consult Bloom filters for root commits
  t/t4216-log-bloom.sh: harden `test_bloom_filters_not_used()`
2024-07-08 14:53:10 -07:00

278 lines
7.5 KiB
C

#ifndef REPOSITORY_H
#define REPOSITORY_H
#include "strmap.h"
struct config_set;
struct fsmonitor_settings;
struct git_hash_algo;
struct index_state;
struct lock_file;
struct pathspec;
struct raw_object_store;
struct submodule_cache;
struct promisor_remote_config;
struct remote_state;
enum untracked_cache_setting {
UNTRACKED_CACHE_KEEP,
UNTRACKED_CACHE_REMOVE,
UNTRACKED_CACHE_WRITE,
};
enum fetch_negotiation_setting {
FETCH_NEGOTIATION_CONSECUTIVE,
FETCH_NEGOTIATION_SKIPPING,
FETCH_NEGOTIATION_NOOP,
};
enum ref_storage_format {
REF_STORAGE_FORMAT_UNKNOWN,
REF_STORAGE_FORMAT_FILES,
REF_STORAGE_FORMAT_REFTABLE,
};
struct repo_settings {
int initialized;
int core_commit_graph;
int commit_graph_generation_version;
int commit_graph_changed_paths_version;
int gc_write_commit_graph;
int fetch_write_commit_graph;
int command_requires_full_index;
int sparse_index;
int pack_read_reverse_index;
int pack_use_bitmap_boundary_traversal;
int pack_use_multi_pack_reuse;
/*
* Does this repository have core.useReplaceRefs=true (on by
* default)? This provides a repository-scoped version of this
* config, though it could be disabled process-wide via some Git
* builtins or the --no-replace-objects option. See
* replace_refs_enabled() for more details.
*/
int read_replace_refs;
struct fsmonitor_settings *fsmonitor; /* lazily loaded */
int index_version;
int index_skip_hash;
enum untracked_cache_setting core_untracked_cache;
int pack_use_sparse;
enum fetch_negotiation_setting fetch_negotiation_algorithm;
int core_multi_pack_index;
};
struct repo_path_cache {
char *squash_msg;
char *merge_msg;
char *merge_rr;
char *merge_mode;
char *merge_head;
char *fetch_head;
char *shallow;
};
struct repository {
/* Environment */
/*
* Path to the git directory.
* Cannot be NULL after initialization.
*/
char *gitdir;
/*
* Path to the common git directory.
* Cannot be NULL after initialization.
*/
char *commondir;
/*
* Holds any information related to accessing the raw object content.
*/
struct raw_object_store *objects;
/*
* All objects in this repository that have been parsed. This structure
* owns all objects it references, so users of "struct object *"
* generally do not need to free them; instead, when a repository is no
* longer used, call parsed_object_pool_clear() on this structure, which
* is called by the repositories repo_clear on its desconstruction.
*/
struct parsed_object_pool *parsed_objects;
/*
* The store in which the refs are held. This should generally only be
* accessed via get_main_ref_store(), as that will lazily initialize
* the ref object.
*/
struct ref_store *refs_private;
/*
* A strmap of ref_stores, stored by submodule name, accessible via
* `repo_get_submodule_ref_store()`.
*/
struct strmap submodule_ref_stores;
/*
* A strmap of ref_stores, stored by worktree id, accessible via
* `get_worktree_ref_store()`.
*/
struct strmap worktree_ref_stores;
/*
* Contains path to often used file names.
*/
struct repo_path_cache cached_paths;
/*
* Path to the repository's graft file.
* Cannot be NULL after initialization.
*/
char *graft_file;
/*
* Path to the current worktree's index file.
* Cannot be NULL after initialization.
*/
char *index_file;
/*
* Path to the working directory.
* A NULL value indicates that there is no working directory.
*/
char *worktree;
/*
* Path from the root of the top-level superproject down to this
* repository. This is only non-NULL if the repository is initialized
* as a submodule of another repository.
*/
char *submodule_prefix;
struct repo_settings settings;
/* Subsystems */
/*
* Repository's config which contains key-value pairs from the usual
* set of config files (i.e. repo specific .git/config, user wide
* ~/.gitconfig, XDG config file and the global /etc/gitconfig)
*/
struct config_set *config;
/* Repository's submodule config as defined by '.gitmodules' */
struct submodule_cache *submodule_cache;
/*
* Repository's in-memory index.
* 'repo_read_index()' can be used to populate 'index'.
*/
struct index_state *index;
/* Repository's remotes and associated structures. */
struct remote_state *remote_state;
/* Repository's current hash algorithm, as serialized on disk. */
const struct git_hash_algo *hash_algo;
/* Repository's compatibility hash algorithm. */
const struct git_hash_algo *compat_hash_algo;
/* Repository's reference storage format, as serialized on disk. */
enum ref_storage_format ref_storage_format;
/* A unique-id for tracing purposes. */
int trace2_repo_id;
/* True if commit-graph has been disabled within this process. */
int commit_graph_disabled;
/* Configurations related to promisor remotes. */
char *repository_format_partial_clone;
struct promisor_remote_config *promisor_remote_config;
/* Configurations */
int repository_format_worktree_config;
/* Indicate if a repository has a different 'commondir' from 'gitdir' */
unsigned different_commondir:1;
};
#ifdef USE_THE_REPOSITORY_VARIABLE
extern struct repository *the_repository;
#endif
/*
* Define a custom repository layout. Any field can be NULL, which
* will default back to the path according to the default layout.
*/
struct set_gitdir_args {
const char *commondir;
const char *object_dir;
const char *graft_file;
const char *index_file;
const char *alternate_db;
int disable_ref_updates;
};
void repo_set_gitdir(struct repository *repo, const char *root,
const struct set_gitdir_args *extra_args);
void repo_set_worktree(struct repository *repo, const char *path);
void repo_set_hash_algo(struct repository *repo, int algo);
void repo_set_compat_hash_algo(struct repository *repo, int compat_algo);
void repo_set_ref_storage_format(struct repository *repo,
enum ref_storage_format format);
void initialize_repository(struct repository *repo);
RESULT_MUST_BE_USED
int repo_init(struct repository *r, const char *gitdir, const char *worktree);
/*
* Initialize the repository 'subrepo' as the submodule at the given path. If
* the submodule's gitdir cannot be found at <path>/.git, this function calls
* submodule_from_path() to try to find it. treeish_name is only used if
* submodule_from_path() needs to be called; see its documentation for more
* information.
* Return 0 upon success and a non-zero value upon failure.
*/
struct object_id;
RESULT_MUST_BE_USED
int repo_submodule_init(struct repository *subrepo,
struct repository *superproject,
const char *path,
const struct object_id *treeish_name);
void repo_clear(struct repository *repo);
/*
* Populates the repository's index from its index_file, an index struct will
* be allocated if needed.
*
* Return the number of index entries in the populated index or a value less
* than zero if an error occurred. If the repository's index has already been
* populated then the number of entries will simply be returned.
*/
int repo_read_index(struct repository *repo);
int repo_hold_locked_index(struct repository *repo,
struct lock_file *lf,
int flags);
int repo_read_index_unmerged(struct repository *);
/*
* Opportunistically update the index but do not complain if we can't.
* The lockfile is always committed or rolled back.
*/
void repo_update_index_if_able(struct repository *, struct lock_file *);
void prepare_repo_settings(struct repository *r);
/*
* Return 1 if upgrade repository format to target_version succeeded,
* 0 if no upgrade is necessary, and -1 when upgrade is not possible.
*/
int upgrade_repository_format(int target_version);
#endif /* REPOSITORY_H */