commit-graph.h

   1 #ifndef COMMIT_GRAPH_H
   2 #define COMMIT_GRAPH_H
   3
   4 #include "git-compat-util.h"
   5 #include "repository.h"
   6 #include "string-list.h"
   7 #include "cache.h"
   8
   9 #define GIT_TEST_COMMIT_GRAPH "GIT_TEST_COMMIT_GRAPH"
  10
  11 struct commit;
  12
  13 char *get_commit_graph_filename(const char *obj_dir);
  14
  15 /*
  16  * Given a commit struct, try to fill the commit struct info, including:
  17  *  1. tree object
  18  *  2. date
  19  *  3. parents.
  20  *
  21  * Returns 1 if and only if the commit was found in the packed graph.
  22  *
  23  * See parse_commit_buffer() for the fallback after this call.
  24  */
  25 int parse_commit_in_graph(struct repository *r, struct commit *item);
  26
  27 /*
  28  * It is possible that we loaded commit contents from the commit buffer,
  29  * but we also want to ensure the commit-graph content is correctly
  30  * checked and filled. Fill the graph_pos and generation members of
  31  * the given commit.
  32  */
  33 void load_commit_graph_info(struct repository *r, struct commit *item);
  34
  35 struct tree *get_commit_tree_in_graph(struct repository *r,
  36                                       const struct commit *c);
  37
  38 struct commit_graph {
  39         int graph_fd;
  40
  41         const unsigned char *data;
  42         size_t data_len;
  43
  44         unsigned char hash_len;
  45         unsigned char num_chunks;
  46         uint32_t num_commits;
  47         struct object_id oid;
  48
  49         const uint32_t *chunk_oid_fanout;
  50         const unsigned char *chunk_oid_lookup;
  51         const unsigned char *chunk_commit_data;
  52         const unsigned char *chunk_large_edges;
  53 };
  54
  55 struct commit_graph *load_commit_graph_one(const char *graph_file);
  56
  57 /*
  58  * Return 1 if and only if the repository has a commit-graph
  59  * file and generation numbers are computed in that file.
  60  */
  61 int generation_numbers_enabled(struct repository *r);
  62
  63 void write_commit_graph_reachable(const char *obj_dir, int append);
  64 void write_commit_graph(const char *obj_dir,
  65                         struct string_list *pack_indexes,
  66                         struct string_list *commit_hex,
  67                         int append);
  68
  69 int verify_commit_graph(struct repository *r, struct commit_graph *g);
  70
  71 void free_commit_graph(struct commit_graph *);
  72
  73 #endif