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#define GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD "GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD" 11 12struct commit; 13 14char *get_commit_graph_filename(const char *obj_dir); 15int open_commit_graph(const char *graph_file, int *fd, struct stat *st); 16 17/* 18 * Given a commit struct, try to fill the commit struct info, including: 19 * 1. tree object 20 * 2. date 21 * 3. parents. 22 * 23 * Returns 1 if and only if the commit was found in the packed graph. 24 * 25 * See parse_commit_buffer() for the fallback after this call. 26 */ 27int parse_commit_in_graph(struct repository *r, struct commit *item); 28 29/* 30 * It is possible that we loaded commit contents from the commit buffer, 31 * but we also want to ensure the commit-graph content is correctly 32 * checked and filled. Fill the graph_pos and generation members of 33 * the given commit. 34 */ 35void load_commit_graph_info(struct repository *r, struct commit *item); 36 37struct tree *get_commit_tree_in_graph(struct repository *r, 38 const struct commit *c); 39 40struct commit_graph { 41 int graph_fd; 42 43 const unsigned char *data; 44 size_t data_len; 45 46 unsigned char hash_len; 47 unsigned char num_chunks; 48 uint32_t num_commits; 49 struct object_id oid; 50 51 const uint32_t *chunk_oid_fanout; 52 const unsigned char *chunk_oid_lookup; 53 const unsigned char *chunk_commit_data; 54 const unsigned char *chunk_extra_edges; 55}; 56 57struct commit_graph *load_commit_graph_one_fd_st(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 68#define COMMIT_GRAPH_APPEND (1 << 0) 69#define COMMIT_GRAPH_PROGRESS (1 << 1) 70 71/* 72 * The write_commit_graph* methods return zero on success 73 * and a negative value on failure. Note that if the repository 74 * is not compatible with the commit-graph feature, then the 75 * methods will return 0 without writing a commit-graph. 76 */ 77int write_commit_graph_reachable(const char *obj_dir, unsigned int flags); 78int write_commit_graph(const char *obj_dir, 79 struct string_list *pack_indexes, 80 struct string_list *commit_hex, 81 unsigned int flags); 82 83int verify_commit_graph(struct repository *r, struct commit_graph *g); 84 85void close_commit_graph(struct repository *); 86void free_commit_graph(struct commit_graph *); 87 88#endif