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#ifndef COMMIT_REACH_H
#define COMMIT_REACH_H
#include "commit.h"
#include "commit-slab.h"
struct commit_list;
struct ref_filter;
struct object_id;
struct object_array;
int repo_get_merge_bases(struct repository *r,
struct commit *rev1,
struct commit *rev2,
struct commit_list **result);
int repo_get_merge_bases_many(struct repository *r,
struct commit *one, size_t n,
struct commit **twos,
struct commit_list **result);
/* To be used only when object flags after this call no longer matter */
int repo_get_merge_bases_many_dirty(struct repository *r,
struct commit *one, size_t n,
struct commit **twos,
struct commit_list **result);
int get_octopus_merge_bases(struct commit_list *in, struct commit_list **result);
int repo_is_descendant_of(struct repository *r,
struct commit *commit,
struct commit_list *with_commit);
int repo_in_merge_bases(struct repository *r,
struct commit *commit,
struct commit *reference);
int repo_in_merge_bases_many(struct repository *r,
struct commit *commit,
int nr_reference, struct commit **reference,
int ignore_missing_commits);
/*
* Takes a list of commits and returns a new list where those
* have been removed that can be reached from other commits in
* the list. It is useful for, e.g., reducing the commits
* randomly thrown at the git-merge command and removing
* redundant commits that the user shouldn't have given to it.
*
* This function destroys the STALE bit of the commit objects'
* flags.
*/
struct commit_list *reduce_heads(struct commit_list *heads);
/*
* Like `reduce_heads()`, except it replaces the list. Use this
* instead of `foo = reduce_heads(foo);` to avoid memory leaks.
*/
void reduce_heads_replace(struct commit_list **heads);
int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid);
/*
* Unknown has to be "0" here, because that's the default value for
* contains_cache slab entries that have not yet been assigned.
*/
enum contains_result {
CONTAINS_UNKNOWN = 0,
CONTAINS_NO,
CONTAINS_YES
};
define_commit_slab(contains_cache, enum contains_result);
int commit_contains(struct ref_filter *filter, struct commit *commit,
struct commit_list *list, struct contains_cache *cache);
/*
* Determine if every commit in 'from' can reach at least one commit
* that is marked with 'with_flag'. As we traverse, use 'assign_flag'
* as a marker for commits that are already visited. Do not walk
* commits with date below 'min_commit_date' or generation below
* 'min_generation'.
*/
int can_all_from_reach_with_flag(struct object_array *from,
unsigned int with_flag,
unsigned int assign_flag,
timestamp_t min_commit_date,
timestamp_t min_generation);
int can_all_from_reach(struct commit_list *from, struct commit_list *to,
int commit_date_cutoff);
/*
* Return a list of commits containing the commits in the 'to' array
* that are reachable from at least one commit in the 'from' array.
* Also add the given 'flag' to each of the commits in the returned list.
*
* This method uses the PARENT1 and PARENT2 flags during its operation,
* so be sure these flags are not set before calling the method.
*/
struct commit_list *get_reachable_subset(struct commit **from, size_t nr_from,
struct commit **to, size_t nr_to,
unsigned int reachable_flag);
struct ahead_behind_count {
/**
* As input, the *_index members indicate which positions in
* the 'tips' array correspond to the tip and base of this
* comparison.
*/
size_t tip_index;
size_t base_index;
/**
* These values store the computed counts for each side of the
* symmetric difference:
*
* 'ahead' stores the number of commits reachable from the tip
* and not reachable from the base.
*
* 'behind' stores the number of commits reachable from the base
* and not reachable from the tip.
*/
unsigned int ahead;
unsigned int behind;
};
/*
* Given an array of commits and an array of ahead_behind_count pairs,
* compute the ahead/behind counts for each pair.
*/
void ahead_behind(struct repository *r,
struct commit **commits, size_t commits_nr,
struct ahead_behind_count *counts, size_t counts_nr);
/*
* For all tip commits, add 'mark' to their flags if and only if they
* are reachable from one of the commits in 'bases'.
*/
void tips_reachable_from_bases(struct repository *r,
struct commit_list *bases,
struct commit **tips, size_t tips_nr,
int mark);
/*
* Given a 'tip' commit and a list potential 'bases', return the index 'i' that
* minimizes the number of commits in the first-parent history of 'tip' and not
* in the first-parent history of 'bases[i]'.
*
* Among a list of long-lived branches that are updated only by merges (with the
* first parent being the previous position of the branch), this would inform
* which branch was used to create the tip reference.
*
* Returns -1 if no common point is found in first-parent histories, which is
* rare, but possible with multiple root commits.
*/
int get_branch_base_for_tip(struct repository *r,
struct commit *tip,
struct commit **bases,
size_t bases_nr);
#endif
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