Merge branch 'jh/trace2-pretty-output'
[git/git.git] / commit-reach.h
1 #ifndef COMMIT_REACH_H
2 #define COMMIT_REACH_H
3
4 #include "commit.h"
5 #include "commit-slab.h"
6
7 struct commit_list;
8 struct ref_filter;
9 struct object_id;
10 struct object_array;
11
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);
18 /* To be used only when object flags after this call no longer matter */
19 struct commit_list *repo_get_merge_bases_many_dirty(struct repository *r,
20 struct commit *one, int n,
21 struct commit **twos);
22 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
23 #define get_merge_bases(r1, r2) repo_get_merge_bases(the_repository, r1, r2)
24 #define get_merge_bases_many(one, n, two) repo_get_merge_bases_many(the_repository, one, n, two)
25 #define get_merge_bases_many_dirty(one, n, twos) repo_get_merge_bases_many_dirty(the_repository, one, n, twos)
26 #endif
27
28 struct commit_list *get_octopus_merge_bases(struct commit_list *in);
29
30 int is_descendant_of(struct commit *commit, struct commit_list *with_commit);
31 int repo_in_merge_bases(struct repository *r,
32 struct commit *commit,
33 struct commit *reference);
34 int repo_in_merge_bases_many(struct repository *r,
35 struct commit *commit,
36 int nr_reference, struct commit **reference);
37 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
38 #define in_merge_bases(c1, c2) repo_in_merge_bases(the_repository, c1, c2)
39 #define in_merge_bases_many(c1, n, cs) repo_in_merge_bases_many(the_repository, c1, n, cs)
40 #endif
41
42 /*
43 * Takes a list of commits and returns a new list where those
44 * have been removed that can be reached from other commits in
45 * the list. It is useful for, e.g., reducing the commits
46 * randomly thrown at the git-merge command and removing
47 * redundant commits that the user shouldn't have given to it.
48 *
49 * This function destroys the STALE bit of the commit objects'
50 * flags.
51 */
52 struct commit_list *reduce_heads(struct commit_list *heads);
53
54 /*
55 * Like `reduce_heads()`, except it replaces the list. Use this
56 * instead of `foo = reduce_heads(foo);` to avoid memory leaks.
57 */
58 void reduce_heads_replace(struct commit_list **heads);
59
60 int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid);
61
62 /*
63 * Unknown has to be "0" here, because that's the default value for
64 * contains_cache slab entries that have not yet been assigned.
65 */
66 enum contains_result {
67 CONTAINS_UNKNOWN = 0,
68 CONTAINS_NO,
69 CONTAINS_YES
70 };
71
72 define_commit_slab(contains_cache, enum contains_result);
73
74 int commit_contains(struct ref_filter *filter, struct commit *commit,
75 struct commit_list *list, struct contains_cache *cache);
76
77 /*
78 * Determine if every commit in 'from' can reach at least one commit
79 * that is marked with 'with_flag'. As we traverse, use 'assign_flag'
80 * as a marker for commits that are already visited. Do not walk
81 * commits with date below 'min_commit_date' or generation below
82 * 'min_generation'.
83 */
84 int can_all_from_reach_with_flag(struct object_array *from,
85 unsigned int with_flag,
86 unsigned int assign_flag,
87 time_t min_commit_date,
88 uint32_t min_generation);
89 int can_all_from_reach(struct commit_list *from, struct commit_list *to,
90 int commit_date_cutoff);
91
92
93 /*
94 * Return a list of commits containing the commits in the 'to' array
95 * that are reachable from at least one commit in the 'from' array.
96 * Also add the given 'flag' to each of the commits in the returned list.
97 *
98 * This method uses the PARENT1 and PARENT2 flags during its operation,
99 * so be sure these flags are not set before calling the method.
100 */
101 struct commit_list *get_reachable_subset(struct commit **from, int nr_from,
102 struct commit **to, int nr_to,
103 unsigned int reachable_flag);
104
105 #endif