repository.h

   1 #ifndef REPOSITORY_H
   2 #define REPOSITORY_H
   3
   4 struct config_set;
   5 struct fsmonitor_settings;
   6 struct git_hash_algo;
   7 struct index_state;
   8 struct lock_file;
   9 struct pathspec;
  10 struct raw_object_store;
  11 struct submodule_cache;
  12 struct promisor_remote_config;
  13 struct remote_state;
  14
  15 enum untracked_cache_setting {
  16         UNTRACKED_CACHE_KEEP,
  17         UNTRACKED_CACHE_REMOVE,
  18         UNTRACKED_CACHE_WRITE,
  19 };
  20
  21 enum fetch_negotiation_setting {
  22         FETCH_NEGOTIATION_CONSECUTIVE,
  23         FETCH_NEGOTIATION_SKIPPING,
  24         FETCH_NEGOTIATION_NOOP,
  25 };
  26
  27 #define REF_STORAGE_FORMAT_UNKNOWN  0
  28 #define REF_STORAGE_FORMAT_FILES    1
  29 #define REF_STORAGE_FORMAT_REFTABLE 2
  30
  31 struct repo_settings {
  32         int initialized;
  33
  34         int core_commit_graph;
  35         int commit_graph_generation_version;
  36         int commit_graph_read_changed_paths;
  37         int gc_write_commit_graph;
  38         int fetch_write_commit_graph;
  39         int command_requires_full_index;
  40         int sparse_index;
  41         int pack_read_reverse_index;
  42         int pack_use_bitmap_boundary_traversal;
  43         int pack_use_multi_pack_reuse;
  44
  45         /*
  46          * Does this repository have core.useReplaceRefs=true (on by
  47          * default)? This provides a repository-scoped version of this
  48          * config, though it could be disabled process-wide via some Git
  49          * builtins or the --no-replace-objects option. See
  50          * replace_refs_enabled() for more details.
  51          */
  52         int read_replace_refs;
  53
  54         struct fsmonitor_settings *fsmonitor; /* lazily loaded */
  55
  56         int index_version;
  57         int index_skip_hash;
  58         enum untracked_cache_setting core_untracked_cache;
  59
  60         int pack_use_sparse;
  61         enum fetch_negotiation_setting fetch_negotiation_algorithm;
  62
  63         int core_multi_pack_index;
  64 };
  65
  66 struct repo_path_cache {
  67         char *squash_msg;
  68         char *merge_msg;
  69         char *merge_rr;
  70         char *merge_mode;
  71         char *merge_head;
  72         char *fetch_head;
  73         char *shallow;
  74 };
  75
  76 struct repository {
  77         /* Environment */
  78         /*
  79          * Path to the git directory.
  80          * Cannot be NULL after initialization.
  81          */
  82         char *gitdir;
  83
  84         /*
  85          * Path to the common git directory.
  86          * Cannot be NULL after initialization.
  87          */
  88         char *commondir;
  89
  90         /*
  91          * Holds any information related to accessing the raw object content.
  92          */
  93         struct raw_object_store *objects;
  94
  95         /*
  96          * All objects in this repository that have been parsed. This structure
  97          * owns all objects it references, so users of "struct object *"
  98          * generally do not need to free them; instead, when a repository is no
  99          * longer used, call parsed_object_pool_clear() on this structure, which
 100          * is called by the repositories repo_clear on its desconstruction.
 101          */
 102         struct parsed_object_pool *parsed_objects;
 103
 104         /*
 105          * The store in which the refs are held. This should generally only be
 106          * accessed via get_main_ref_store(), as that will lazily initialize
 107          * the ref object.
 108          */
 109         struct ref_store *refs_private;
 110
 111         /*
 112          * Contains path to often used file names.
 113          */
 114         struct repo_path_cache cached_paths;
 115
 116         /*
 117          * Path to the repository's graft file.
 118          * Cannot be NULL after initialization.
 119          */
 120         char *graft_file;
 121
 122         /*
 123          * Path to the current worktree's index file.
 124          * Cannot be NULL after initialization.
 125          */
 126         char *index_file;
 127
 128         /*
 129          * Path to the working directory.
 130          * A NULL value indicates that there is no working directory.
 131          */
 132         char *worktree;
 133
 134         /*
 135          * Path from the root of the top-level superproject down to this
 136          * repository.  This is only non-NULL if the repository is initialized
 137          * as a submodule of another repository.
 138          */
 139         char *submodule_prefix;
 140
 141         struct repo_settings settings;
 142
 143         /* Subsystems */
 144         /*
 145          * Repository's config which contains key-value pairs from the usual
 146          * set of config files (i.e. repo specific .git/config, user wide
 147          * ~/.gitconfig, XDG config file and the global /etc/gitconfig)
 148          */
 149         struct config_set *config;
 150
 151         /* Repository's submodule config as defined by '.gitmodules' */
 152         struct submodule_cache *submodule_cache;
 153
 154         /*
 155          * Repository's in-memory index.
 156          * 'repo_read_index()' can be used to populate 'index'.
 157          */
 158         struct index_state *index;
 159
 160         /* Repository's remotes and associated structures. */
 161         struct remote_state *remote_state;
 162
 163         /* Repository's current hash algorithm, as serialized on disk. */
 164         const struct git_hash_algo *hash_algo;
 165
 166         /* Repository's reference storage format, as serialized on disk. */
 167         unsigned int ref_storage_format;
 168
 169         /* A unique-id for tracing purposes. */
 170         int trace2_repo_id;
 171
 172         /* True if commit-graph has been disabled within this process. */
 173         int commit_graph_disabled;
 174
 175         /* Configurations related to promisor remotes. */
 176         char *repository_format_partial_clone;
 177         struct promisor_remote_config *promisor_remote_config;
 178
 179         /* Configurations */
 180         int repository_format_worktree_config;
 181
 182         /* Indicate if a repository has a different 'commondir' from 'gitdir' */
 183         unsigned different_commondir:1;
 184 };
 185
 186 extern struct repository *the_repository;
 187 #ifdef USE_THE_INDEX_VARIABLE
 188 extern struct index_state the_index;
 189 #endif
 190
 191 /*
 192  * Define a custom repository layout. Any field can be NULL, which
 193  * will default back to the path according to the default layout.
 194  */
 195 struct set_gitdir_args {
 196         const char *commondir;
 197         const char *object_dir;
 198         const char *graft_file;
 199         const char *index_file;
 200         const char *alternate_db;
 201         int disable_ref_updates;
 202 };
 203
 204 void repo_set_gitdir(struct repository *repo, const char *root,
 205                      const struct set_gitdir_args *extra_args);
 206 void repo_set_worktree(struct repository *repo, const char *path);
 207 void repo_set_hash_algo(struct repository *repo, int algo);
 208 void repo_set_ref_storage_format(struct repository *repo, unsigned int format);
 209 void initialize_the_repository(void);
 210 RESULT_MUST_BE_USED
 211 int repo_init(struct repository *r, const char *gitdir, const char *worktree);
 212
 213 /*
 214  * Initialize the repository 'subrepo' as the submodule at the given path. If
 215  * the submodule's gitdir cannot be found at <path>/.git, this function calls
 216  * submodule_from_path() to try to find it. treeish_name is only used if
 217  * submodule_from_path() needs to be called; see its documentation for more
 218  * information.
 219  * Return 0 upon success and a non-zero value upon failure.
 220  */
 221 struct object_id;
 222 RESULT_MUST_BE_USED
 223 int repo_submodule_init(struct repository *subrepo,
 224                         struct repository *superproject,
 225                         const char *path,
 226                         const struct object_id *treeish_name);
 227 void repo_clear(struct repository *repo);
 228
 229 /*
 230  * Populates the repository's index from its index_file, an index struct will
 231  * be allocated if needed.
 232  *
 233  * Return the number of index entries in the populated index or a value less
 234  * than zero if an error occurred.  If the repository's index has already been
 235  * populated then the number of entries will simply be returned.
 236  */
 237 int repo_read_index(struct repository *repo);
 238 int repo_hold_locked_index(struct repository *repo,
 239                            struct lock_file *lf,
 240                            int flags);
 241
 242 int repo_read_index_unmerged(struct repository *);
 243 /*
 244  * Opportunistically update the index but do not complain if we can't.
 245  * The lockfile is always committed or rolled back.
 246  */
 247 void repo_update_index_if_able(struct repository *, struct lock_file *);
 248
 249 void prepare_repo_settings(struct repository *r);
 250
 251 /*
 252  * Return 1 if upgrade repository format to target_version succeeded,
 253  * 0 if no upgrade is necessary, and -1 when upgrade is not possible.
 254  */
 255 int upgrade_repository_format(int target_version);
 256
 257 #endif /* REPOSITORY_H */