repository.h

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