Andrew's git / gitweb.git /
096d8bac340514916c852268ef37c7b97190799a
   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
  11struct commit;
  12
  13char *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 */
  25int 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 */
  33void load_commit_graph_info(struct repository *r, struct commit *item);
  34
  35struct tree *get_commit_tree_in_graph(struct repository *r,
  36                                      const struct commit *c);
  37
  38struct 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_extra_edges;
  53};
  54
  55struct commit_graph *load_commit_graph_one(const char *graph_file);
  56
  57struct commit_graph *parse_commit_graph(void *graph_map, int fd,
  58                                        size_t graph_size);
  59
  60/*
  61 * Return 1 if and only if the repository has a commit-graph
  62 * file and generation numbers are computed in that file.
  63 */
  64int generation_numbers_enabled(struct repository *r);
  65
  66void write_commit_graph_reachable(const char *obj_dir, int append,
  67                                  int report_progress);
  68void write_commit_graph(const char *obj_dir,
  69                        struct string_list *pack_indexes,
  70                        struct string_list *commit_hex,
  71                        int append, int report_progress);
  72
  73int verify_commit_graph(struct repository *r, struct commit_graph *g);
  74
  75void close_commit_graph(struct repository *);
  76void free_commit_graph(struct commit_graph *);
  77
  78#endif