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