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merge-ort: add new data structures for directory rename detection

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Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren 2021-01-07 21:35:49 +00:00 committed by Junio C Hamano
parent 8f894b2263
commit c09376d55f
1 changed files with 31 additions and 3 deletions
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34
merge-ort.c
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@ -49,14 +49,42 @@ enum merge_side {
};
struct rename_info {
/*
* All variables that are arrays of size 3 correspond to data tracked
* for the sides in enum merge_side. Index 0 is almost always unused
* because we often only need to track information for MERGE_SIDE1 and
* MERGE_SIDE2 (MERGE_BASE can't have rename information since renames
* are determined relative to what changed since the MERGE_BASE).
*/
/*
* pairs: pairing of filenames from diffcore_rename()
*
* Index 1 and 2 correspond to sides 1 & 2 as used in
* conflict_info.stages. Index 0 unused.
*/
struct diff_queue_struct pairs[3];
/*
* dirs_removed: directories removed on a given side of history.
*/
struct strset dirs_removed[3];
/*
* dir_rename_count: tracking where parts of a directory were renamed to
*
* When files in a directory are renamed, they may not all go to the
* same location. Each strmap here tracks:
* old_dir => {new_dir => int}
* That is, dir_rename_count[side] is a strmap to a strintmap.
*/
struct strmap dir_rename_count[3];
/*
* dir_renames: computed directory renames
*
* This is a map of old_dir => new_dir and is derived in part from
* dir_rename_count.
*/
struct strmap dir_renames[3];
/*
* needed_limit: value needed for inexact rename detection to run
*