commit-graph: load a root tree from specific graph
[git/git.git] / commit-graph.h
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1#ifndef COMMIT_GRAPH_H
2#define COMMIT_GRAPH_H
3
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4#include "git-compat-util.h"
5
6char *get_commit_graph_filename(const char *obj_dir);
7
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8/*
9 * Given a commit struct, try to fill the commit struct info, including:
10 * 1. tree object
11 * 2. date
12 * 3. parents.
13 *
14 * Returns 1 if and only if the commit was found in the packed graph.
15 *
16 * See parse_commit_buffer() for the fallback after this call.
17 */
18int parse_commit_in_graph(struct commit *item);
19
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20/*
21 * It is possible that we loaded commit contents from the commit buffer,
22 * but we also want to ensure the commit-graph content is correctly
23 * checked and filled. Fill the graph_pos and generation members of
24 * the given commit.
25 */
26void load_commit_graph_info(struct commit *item);
27
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28struct tree *get_commit_tree_in_graph(const struct commit *c);
29
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30struct commit_graph {
31 int graph_fd;
32
33 const unsigned char *data;
34 size_t data_len;
35
36 unsigned char hash_len;
37 unsigned char num_chunks;
38 uint32_t num_commits;
39 struct object_id oid;
40
41 const uint32_t *chunk_oid_fanout;
42 const unsigned char *chunk_oid_lookup;
43 const unsigned char *chunk_commit_data;
44 const unsigned char *chunk_large_edges;
45};
46
47struct commit_graph *load_commit_graph_one(const char *graph_file);
48
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49void write_commit_graph(const char *obj_dir,
50 const char **pack_indexes,
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51 int nr_packs,
52 const char **commit_hex,
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53 int nr_commits,
54 int append);
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55
56#endif