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0009d350 RJ |
1 | #ifndef COMMIT_REACH_H |
2 | #define COMMIT_REACH_H | |
5227c385 | 3 | |
1406725b | 4 | #include "commit.h" |
920f93ca DS |
5 | #include "commit-slab.h" |
6 | ||
5227c385 | 7 | struct commit_list; |
920f93ca | 8 | struct ref_filter; |
1406725b RJ |
9 | struct object_id; |
10 | struct object_array; | |
5227c385 | 11 | |
21a9651b SB |
12 | struct commit_list *repo_get_merge_bases(struct repository *r, |
13 | struct commit *rev1, | |
14 | struct commit *rev2); | |
15 | struct commit_list *repo_get_merge_bases_many(struct repository *r, | |
16 | struct commit *one, int n, | |
17 | struct commit **twos); | |
5227c385 | 18 | /* To be used only when object flags after this call no longer matter */ |
21a9651b SB |
19 | struct commit_list *repo_get_merge_bases_many_dirty(struct repository *r, |
20 | struct commit *one, int n, | |
21 | struct commit **twos); | |
21a9651b SB |
22 | |
23 | struct commit_list *get_octopus_merge_bases(struct commit_list *in); | |
5227c385 | 24 | |
c1ea625f CMAB |
25 | int repo_is_descendant_of(struct repository *r, |
26 | struct commit *commit, | |
27 | struct commit_list *with_commit); | |
4d5430f7 SB |
28 | int repo_in_merge_bases(struct repository *r, |
29 | struct commit *commit, | |
30 | struct commit *reference); | |
31 | int repo_in_merge_bases_many(struct repository *r, | |
32 | struct commit *commit, | |
33 | int nr_reference, struct commit **reference); | |
5227c385 | 34 | |
5227c385 DS |
35 | /* |
36 | * Takes a list of commits and returns a new list where those | |
37 | * have been removed that can be reached from other commits in | |
38 | * the list. It is useful for, e.g., reducing the commits | |
39 | * randomly thrown at the git-merge command and removing | |
40 | * redundant commits that the user shouldn't have given to it. | |
41 | * | |
42 | * This function destroys the STALE bit of the commit objects' | |
43 | * flags. | |
44 | */ | |
45 | struct commit_list *reduce_heads(struct commit_list *heads); | |
46 | ||
47 | /* | |
48 | * Like `reduce_heads()`, except it replaces the list. Use this | |
49 | * instead of `foo = reduce_heads(foo);` to avoid memory leaks. | |
50 | */ | |
51 | void reduce_heads_replace(struct commit_list **heads); | |
52 | ||
1d614d41 DS |
53 | int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid); |
54 | ||
920f93ca DS |
55 | /* |
56 | * Unknown has to be "0" here, because that's the default value for | |
57 | * contains_cache slab entries that have not yet been assigned. | |
58 | */ | |
59 | enum contains_result { | |
60 | CONTAINS_UNKNOWN = 0, | |
61 | CONTAINS_NO, | |
62 | CONTAINS_YES | |
63 | }; | |
64 | ||
65 | define_commit_slab(contains_cache, enum contains_result); | |
66 | ||
67 | int commit_contains(struct ref_filter *filter, struct commit *commit, | |
68 | struct commit_list *list, struct contains_cache *cache); | |
69 | ||
ba3ca1ed DS |
70 | /* |
71 | * Determine if every commit in 'from' can reach at least one commit | |
72 | * that is marked with 'with_flag'. As we traverse, use 'assign_flag' | |
73 | * as a marker for commits that are already visited. Do not walk | |
4fbcca4e DS |
74 | * commits with date below 'min_commit_date' or generation below |
75 | * 'min_generation'. | |
ba3ca1ed DS |
76 | */ |
77 | int can_all_from_reach_with_flag(struct object_array *from, | |
78 | unsigned int with_flag, | |
79 | unsigned int assign_flag, | |
4fbcca4e | 80 | time_t min_commit_date, |
d7f92784 | 81 | timestamp_t min_generation); |
1792bc12 DS |
82 | int can_all_from_reach(struct commit_list *from, struct commit_list *to, |
83 | int commit_date_cutoff); | |
ba3ca1ed | 84 | |
fcb2c076 DS |
85 | |
86 | /* | |
87 | * Return a list of commits containing the commits in the 'to' array | |
88 | * that are reachable from at least one commit in the 'from' array. | |
89 | * Also add the given 'flag' to each of the commits in the returned list. | |
90 | * | |
91 | * This method uses the PARENT1 and PARENT2 flags during its operation, | |
92 | * so be sure these flags are not set before calling the method. | |
93 | */ | |
94 | struct commit_list *get_reachable_subset(struct commit **from, int nr_from, | |
95 | struct commit **to, int nr_to, | |
96 | unsigned int reachable_flag); | |
97 | ||
fd67d149 DS |
98 | struct ahead_behind_count { |
99 | /** | |
100 | * As input, the *_index members indicate which positions in | |
101 | * the 'tips' array correspond to the tip and base of this | |
102 | * comparison. | |
103 | */ | |
104 | size_t tip_index; | |
105 | size_t base_index; | |
106 | ||
107 | /** | |
108 | * These values store the computed counts for each side of the | |
109 | * symmetric difference: | |
110 | * | |
111 | * 'ahead' stores the number of commits reachable from the tip | |
112 | * and not reachable from the base. | |
113 | * | |
114 | * 'behind' stores the number of commits reachable from the base | |
115 | * and not reachable from the tip. | |
116 | */ | |
117 | unsigned int ahead; | |
118 | unsigned int behind; | |
119 | }; | |
120 | ||
121 | /* | |
122 | * Given an array of commits and an array of ahead_behind_count pairs, | |
123 | * compute the ahead/behind counts for each pair. | |
124 | */ | |
125 | void ahead_behind(struct repository *r, | |
126 | struct commit **commits, size_t commits_nr, | |
127 | struct ahead_behind_count *counts, size_t counts_nr); | |
128 | ||
cbfe360b DS |
129 | /* |
130 | * For all tip commits, add 'mark' to their flags if and only if they | |
131 | * are reachable from one of the commits in 'bases'. | |
132 | */ | |
133 | void tips_reachable_from_bases(struct repository *r, | |
134 | struct commit_list *bases, | |
135 | struct commit **tips, size_t tips_nr, | |
136 | int mark); | |
137 | ||
5227c385 | 138 | #endif |