repository.h

   1 #ifndef REPOSITORY_H
   2 #define REPOSITORY_H
   3
   4 #include "path.h"
   5
   6 struct config_set;
   7 struct git_hash_algo;
   8 struct index_state;
   9 struct lock_file;
  10 struct pathspec;
  11 struct raw_object_store;
  12 struct submodule_cache;
  13
  14 enum untracked_cache_setting {
  15         UNTRACKED_CACHE_UNSET = -1,
  16         UNTRACKED_CACHE_REMOVE = 0,
  17         UNTRACKED_CACHE_KEEP = 1,
  18         UNTRACKED_CACHE_WRITE = 2
  19 };
  20
  21 enum fetch_negotiation_setting {
  22         FETCH_NEGOTIATION_UNSET = -1,
  23         FETCH_NEGOTIATION_NONE = 0,
  24         FETCH_NEGOTIATION_DEFAULT = 1,
  25         FETCH_NEGOTIATION_SKIPPING = 2,
  26 };
  27
  28 struct repo_settings {
  29         int initialized;
  30
  31         int core_commit_graph;
  32         int gc_write_commit_graph;
  33         int fetch_write_commit_graph;
  34
  35         int index_version;
  36         enum untracked_cache_setting core_untracked_cache;
  37
  38         int pack_use_sparse;
  39         enum fetch_negotiation_setting fetch_negotiation_algorithm;
  40 };
  41
  42 struct repository {
  43         /* Environment */
  44         /*
  45          * Path to the git directory.
  46          * Cannot be NULL after initialization.
  47          */
  48         char *gitdir;
  49
  50         /*
  51          * Path to the common git directory.
  52          * Cannot be NULL after initialization.
  53          */
  54         char *commondir;
  55
  56         /*
  57          * Holds any information related to accessing the raw object content.
  58          */
  59         struct raw_object_store *objects;
  60
  61         /*
  62          * All objects in this repository that have been parsed. This structure
  63          * owns all objects it references, so users of "struct object *"
  64          * generally do not need to free them; instead, when a repository is no
  65          * longer used, call parsed_object_pool_clear() on this structure, which
  66          * is called by the repositories repo_clear on its desconstruction.
  67          */
  68         struct parsed_object_pool *parsed_objects;
  69
  70         /*
  71          * The store in which the refs are held. This should generally only be
  72          * accessed via get_main_ref_store(), as that will lazily initialize
  73          * the ref object.
  74          */
  75         struct ref_store *refs_private;
  76
  77         /*
  78          * Contains path to often used file names.
  79          */
  80         struct path_cache cached_paths;
  81
  82         /*
  83          * Path to the repository's graft file.
  84          * Cannot be NULL after initialization.
  85          */
  86         char *graft_file;
  87
  88         /*
  89          * Path to the current worktree's index file.
  90          * Cannot be NULL after initialization.
  91          */
  92         char *index_file;
  93
  94         /*
  95          * Path to the working directory.
  96          * A NULL value indicates that there is no working directory.
  97          */
  98         char *worktree;
  99
 100         /*
 101          * Path from the root of the top-level superproject down to this
 102          * repository.  This is only non-NULL if the repository is initialized
 103          * as a submodule of another repository.
 104          */
 105         char *submodule_prefix;
 106
 107         struct repo_settings settings;
 108
 109         /* Subsystems */
 110         /*
 111          * Repository's config which contains key-value pairs from the usual
 112          * set of config files (i.e. repo specific .git/config, user wide
 113          * ~/.gitconfig, XDG config file and the global /etc/gitconfig)
 114          */
 115         struct config_set *config;
 116
 117         /* Repository's submodule config as defined by '.gitmodules' */
 118         struct submodule_cache *submodule_cache;
 119
 120         /*
 121          * Repository's in-memory index.
 122          * 'repo_read_index()' can be used to populate 'index'.
 123          */
 124         struct index_state *index;
 125
 126         /* Repository's current hash algorithm, as serialized on disk. */
 127         const struct git_hash_algo *hash_algo;
 128
 129         /* A unique-id for tracing purposes. */
 130         int trace2_repo_id;
 131
 132         /* True if commit-graph has been disabled within this process. */
 133         int commit_graph_disabled;
 134
 135         /* Configurations */
 136
 137         /* Indicate if a repository has a different 'commondir' from 'gitdir' */
 138         unsigned different_commondir:1;
 139 };
 140
 141 extern struct repository *the_repository;
 142
 143 /*
 144  * Define a custom repository layout. Any field can be NULL, which
 145  * will default back to the path according to the default layout.
 146  */
 147 struct set_gitdir_args {
 148         const char *commondir;
 149         const char *object_dir;
 150         const char *graft_file;
 151         const char *index_file;
 152         const char *alternate_db;
 153 };
 154
 155 void repo_set_gitdir(struct repository *repo, const char *root,
 156                      const struct set_gitdir_args *extra_args);
 157 void repo_set_worktree(struct repository *repo, const char *path);
 158 void repo_set_hash_algo(struct repository *repo, int algo);
 159 void initialize_the_repository(void);
 160 int repo_init(struct repository *r, const char *gitdir, const char *worktree);
 161
 162 /*
 163  * Initialize the repository 'subrepo' as the submodule given by the
 164  * struct submodule 'sub' in parent repository 'superproject'.
 165  * Return 0 upon success and a non-zero value upon failure, which may happen
 166  * if the submodule is not found, or 'sub' is NULL.
 167  */
 168 struct submodule;
 169 int repo_submodule_init(struct repository *subrepo,
 170                         struct repository *superproject,
 171                         const struct submodule *sub);
 172 void repo_clear(struct repository *repo);
 173
 174 /*
 175  * Populates the repository's index from its index_file, an index struct will
 176  * be allocated if needed.
 177  *
 178  * Return the number of index entries in the populated index or a value less
 179  * than zero if an error occurred.  If the repository's index has already been
 180  * populated then the number of entries will simply be returned.
 181  */
 182 int repo_read_index(struct repository *repo);
 183 int repo_hold_locked_index(struct repository *repo,
 184                            struct lock_file *lf,
 185                            int flags);
 186
 187 int repo_read_index_preload(struct repository *,
 188                             const struct pathspec *pathspec,
 189                             unsigned refresh_flags);
 190 int repo_read_index_unmerged(struct repository *);
 191 /*
 192  * Opportunistically update the index but do not complain if we can't.
 193  * The lockfile is always committed or rolled back.
 194  */
 195 void repo_update_index_if_able(struct repository *, struct lock_file *);
 196
 197 void prepare_repo_settings(struct repository *r);
 198
 199 /*
 200  * Return 1 if upgrade repository format to target_version succeeded,
 201  * 0 if no upgrade is necessary, and -1 when upgrade is not possible.
 202  */
 203 int upgrade_repository_format(int target_version);
 204
 205 #endif /* REPOSITORY_H */