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08fd81c9 DS |
1 | #ifndef COMMIT_GRAPH_H |
2 | #define COMMIT_GRAPH_H | |
3 | ||
2a2e32bd | 4 | #include "git-compat-util.h" |
0bd52e27 | 5 | #include "object-store.h" |
6830c360 | 6 | #include "oidset.h" |
2a2e32bd | 7 | |
859fdc0c | 8 | #define GIT_TEST_COMMIT_GRAPH "GIT_TEST_COMMIT_GRAPH" |
7b671f8c | 9 | #define GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE "GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE" |
d5b873c8 | 10 | #define GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS "GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS" |
859fdc0c | 11 | |
b23ea979 DS |
12 | /* |
13 | * This method is only used to enhance coverage of the commit-graph | |
14 | * feature in the test suite with the GIT_TEST_COMMIT_GRAPH and | |
15 | * GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS environment variables. Do not | |
16 | * call this method oustide of a builtin, and only if you know what | |
17 | * you are doing! | |
18 | */ | |
19 | void git_test_write_commit_graph_or_die(void); | |
20 | ||
e5c5ca27 | 21 | struct commit; |
76ffbca7 | 22 | struct bloom_filter_settings; |
fa796530 SG |
23 | struct repository; |
24 | struct raw_object_store; | |
25 | struct string_list; | |
e5c5ca27 | 26 | |
ad2dd5bb | 27 | char *get_commit_graph_filename(struct object_directory *odb); |
663b2b1b | 28 | char *get_commit_graph_chain_filename(struct object_directory *odb); |
61df89c8 | 29 | int open_commit_graph(const char *graph_file, int *fd, struct stat *st); |
2a2e32bd | 30 | |
177722b3 DS |
31 | /* |
32 | * Given a commit struct, try to fill the commit struct info, including: | |
33 | * 1. tree object | |
34 | * 2. date | |
35 | * 3. parents. | |
36 | * | |
37 | * Returns 1 if and only if the commit was found in the packed graph. | |
38 | * | |
39 | * See parse_commit_buffer() for the fallback after this call. | |
40 | */ | |
dade47c0 | 41 | int parse_commit_in_graph(struct repository *r, struct commit *item); |
177722b3 | 42 | |
e2838d85 DS |
43 | /* |
44 | * It is possible that we loaded commit contents from the commit buffer, | |
45 | * but we also want to ensure the commit-graph content is correctly | |
46 | * checked and filled. Fill the graph_pos and generation members of | |
47 | * the given commit. | |
48 | */ | |
dade47c0 | 49 | void load_commit_graph_info(struct repository *r, struct commit *item); |
e2838d85 | 50 | |
dade47c0 JT |
51 | struct tree *get_commit_tree_in_graph(struct repository *r, |
52 | const struct commit *c); | |
7b8a21db | 53 | |
2a2e32bd | 54 | struct commit_graph { |
2a2e32bd DS |
55 | const unsigned char *data; |
56 | size_t data_len; | |
57 | ||
58 | unsigned char hash_len; | |
59 | unsigned char num_chunks; | |
60 | uint32_t num_commits; | |
61 | struct object_id oid; | |
6c622f9f | 62 | char *filename; |
13c24992 | 63 | struct object_directory *odb; |
2a2e32bd | 64 | |
d4f4d60f | 65 | uint32_t num_commits_in_base; |
1fdc383c | 66 | unsigned int read_generation_data; |
d4f4d60f DS |
67 | struct commit_graph *base_graph; |
68 | ||
2a2e32bd DS |
69 | const uint32_t *chunk_oid_fanout; |
70 | const unsigned char *chunk_oid_lookup; | |
71 | const unsigned char *chunk_commit_data; | |
e8b63005 AK |
72 | const unsigned char *chunk_generation_data; |
73 | const unsigned char *chunk_generation_data_overflow; | |
5af7417b | 74 | const unsigned char *chunk_extra_edges; |
118bd570 | 75 | const unsigned char *chunk_base_graphs; |
76ffbca7 GS |
76 | const unsigned char *chunk_bloom_indexes; |
77 | const unsigned char *chunk_bloom_data; | |
78 | ||
72a2bfca | 79 | struct topo_level_slab *topo_levels; |
76ffbca7 | 80 | struct bloom_filter_settings *bloom_filter_settings; |
2a2e32bd DS |
81 | }; |
82 | ||
ab14d067 TB |
83 | struct commit_graph *load_commit_graph_one_fd_st(struct repository *r, |
84 | int fd, struct stat *st, | |
a7df60ca | 85 | struct object_directory *odb); |
13c24992 TB |
86 | struct commit_graph *read_commit_graph_one(struct repository *r, |
87 | struct object_directory *odb); | |
ab14d067 TB |
88 | struct commit_graph *parse_commit_graph(struct repository *r, |
89 | void *graph_map, size_t graph_size); | |
aa658574 | 90 | |
6cc01743 DS |
91 | /* |
92 | * Return 1 if and only if the repository has a commit-graph | |
93 | * file and generation numbers are computed in that file. | |
94 | */ | |
95 | int generation_numbers_enabled(struct repository *r); | |
96 | ||
8d00d7c3 AK |
97 | /* |
98 | * Return 1 if and only if the repository has a commit-graph | |
99 | * file and generation data chunk has been written for the file. | |
100 | */ | |
101 | int corrected_commit_dates_enabled(struct repository *r); | |
102 | ||
4f364405 TB |
103 | struct bloom_filter_settings *get_bloom_filter_settings(struct repository *r); |
104 | ||
39d88318 SG |
105 | enum commit_graph_write_flags { |
106 | COMMIT_GRAPH_WRITE_APPEND = (1 << 0), | |
107 | COMMIT_GRAPH_WRITE_PROGRESS = (1 << 1), | |
7c5c9b9c | 108 | COMMIT_GRAPH_WRITE_SPLIT = (1 << 2), |
2f00c355 | 109 | COMMIT_GRAPH_WRITE_BLOOM_FILTERS = (1 << 3), |
70cdbbe3 | 110 | COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS = (1 << 4), |
39d88318 | 111 | }; |
5af80394 | 112 | |
4f027355 | 113 | enum commit_graph_split_flags { |
fdbde82f | 114 | COMMIT_GRAPH_SPLIT_UNSPECIFIED = 0, |
8a6ac287 TB |
115 | COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED = 1, |
116 | COMMIT_GRAPH_SPLIT_REPLACE = 2 | |
4f027355 TB |
117 | }; |
118 | ||
98bb7961 | 119 | struct commit_graph_opts { |
c2bc6e6a DS |
120 | int size_multiple; |
121 | int max_commits; | |
122 | timestamp_t expire_time; | |
98bb7961 | 123 | enum commit_graph_split_flags split_flags; |
809e0327 | 124 | int max_new_filters; |
c2bc6e6a DS |
125 | }; |
126 | ||
e103f727 DS |
127 | /* |
128 | * The write_commit_graph* methods return zero on success | |
129 | * and a negative value on failure. Note that if the repository | |
130 | * is not compatible with the commit-graph feature, then the | |
131 | * methods will return 0 without writing a commit-graph. | |
132 | */ | |
0bd52e27 | 133 | int write_commit_graph_reachable(struct object_directory *odb, |
39d88318 | 134 | enum commit_graph_write_flags flags, |
98bb7961 | 135 | const struct commit_graph_opts *opts); |
0bd52e27 | 136 | int write_commit_graph(struct object_directory *odb, |
e103f727 | 137 | struct string_list *pack_indexes, |
6830c360 | 138 | struct oidset *commits, |
39d88318 | 139 | enum commit_graph_write_flags flags, |
98bb7961 | 140 | const struct commit_graph_opts *opts); |
08fd81c9 | 141 | |
3da4b609 DS |
142 | #define COMMIT_GRAPH_VERIFY_SHALLOW (1 << 0) |
143 | ||
144 | int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags); | |
283e68c7 | 145 | |
c3a3a964 | 146 | void close_commit_graph(struct raw_object_store *); |
c3756d5b JT |
147 | void free_commit_graph(struct commit_graph *); |
148 | ||
6abada18 JK |
149 | /* |
150 | * Disable further use of the commit graph in this process when parsing a | |
151 | * "struct commit". | |
152 | */ | |
153 | void disable_commit_graph(struct repository *r); | |
154 | ||
4844812b AK |
155 | struct commit_graph_data { |
156 | uint32_t graph_pos; | |
d7f92784 | 157 | timestamp_t generation; |
4844812b AK |
158 | }; |
159 | ||
160 | /* | |
161 | * Commits should be parsed before accessing generation, graph positions. | |
162 | */ | |
d7f92784 | 163 | timestamp_t commit_graph_generation(const struct commit *); |
4844812b | 164 | uint32_t commit_graph_position(const struct commit *); |
08fd81c9 | 165 | #endif |