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 int open_commit_graph(const char *graph_file, int *fd, struct stat *st);
  15
  16 /*
  17  * Given a commit struct, try to fill the commit struct info, including:
  18  *  1. tree object
  19  *  2. date
  20  *  3. parents.
  21  *
  22  * Returns 1 if and only if the commit was found in the packed graph.
  23  *
  24  * See parse_commit_buffer() for the fallback after this call.
  25  */
  26 int parse_commit_in_graph(struct repository *r, struct commit *item);
  27
  28 /*
  29  * It is possible that we loaded commit contents from the commit buffer,
  30  * but we also want to ensure the commit-graph content is correctly
  31  * checked and filled. Fill the graph_pos and generation members of
  32  * the given commit.
  33  */
  34 void load_commit_graph_info(struct repository *r, struct commit *item);
  35
  36 struct tree *get_commit_tree_in_graph(struct repository *r,
  37                                       const struct commit *c);
  38
  39 struct commit_graph {
  40         int graph_fd;
  41
  42         const unsigned char *data;
  43         size_t data_len;
  44
  45         unsigned char hash_len;
  46         unsigned char num_chunks;
  47         uint32_t num_commits;
  48         struct object_id oid;
  49
  50         const uint32_t *chunk_oid_fanout;
  51         const unsigned char *chunk_oid_lookup;
  52         const unsigned char *chunk_commit_data;
  53         const unsigned char *chunk_extra_edges;
  54 };
  55
  56 struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st);
  57
  58 struct commit_graph *parse_commit_graph(void *graph_map, int fd,
  59                                         size_t graph_size);
  60
  61 /*
  62  * Return 1 if and only if the repository has a commit-graph
  63  * file and generation numbers are computed in that file.
  64  */
  65 int generation_numbers_enabled(struct repository *r);
  66
  67 void write_commit_graph_reachable(const char *obj_dir, int append,
  68                                   int report_progress);
  69 void write_commit_graph(const char *obj_dir,
  70                         struct string_list *pack_indexes,
  71                         struct string_list *commit_hex,
  72                         int append, int report_progress);
  73
  74 int verify_commit_graph(struct repository *r, struct commit_graph *g);
  75
  76 void close_commit_graph(struct repository *);
  77 void free_commit_graph(struct commit_graph *);
  78
  79 #endif