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merge-base --fork-point: extract libified function

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We need this functionality in the builtin rebase.

Note: to make this function truly reusable, we have to switch the call
get_merges_many_dirty() to get_merges_many() because we want the commit
flags to be reset (otherwise, subsequent get_merge_bases() calls would
obtain incorrect results). This did not matter when the function was
called in `git rev-parse --fork-point` because in that command, the
process definitely did not traverse any commits before exiting.

Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pratik Karki
2018-09-04 15:00:08 -07:00
committed by Johannes Schindelin
parent 90f90c55ec
commit ba4e5a84cf
3 changed files with 89 additions and 75 deletions
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2
commit.h
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@@ -211,6 +211,8 @@ extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
/* To be used only when object flags after this call no longer matter */
extern struct commit_list *get_merge_bases_many_dirty(struct commit *one, int n, struct commit **twos);
struct commit *get_fork_point(const char *refname, struct commit *commit);
/* largest positive number a signed 32-bit integer can contain */
#define INFINITE_DEPTH 0x7fffffff