Andrew's git / gitweb.git /
77cc739bc020a6dfd5425b39313ae7d6299b660c
   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);
  14int 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 */
  26int 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 */
  34void load_commit_graph_info(struct repository *r, struct commit *item);
  35
  36struct tree *get_commit_tree_in_graph(struct repository *r,
  37                                      const struct commit *c);
  38
  39struct 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
  56struct commit_graph *load_commit_graph_one_fd_st(const char *graph_file,
  57                                                 int fd, struct stat *st);
  58
  59struct commit_graph *parse_commit_graph(void *graph_map, int fd,
  60                                        size_t graph_size);
  61
  62/*
  63 * Return 1 if and only if the repository has a commit-graph
  64 * file and generation numbers are computed in that file.
  65 */
  66int generation_numbers_enabled(struct repository *r);
  67
  68void write_commit_graph_reachable(const char *obj_dir, int append,
  69                                  int report_progress);
  70void write_commit_graph(const char *obj_dir,
  71                        struct string_list *pack_indexes,
  72                        struct string_list *commit_hex,
  73                        int append, int report_progress);
  74
  75int verify_commit_graph(struct repository *r, struct commit_graph *g);
  76
  77void close_commit_graph(struct repository *);
  78void free_commit_graph(struct commit_graph *);
  79
  80#endif