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replace-object: move replace_map to object store

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The relationship between an object X and another object Y that
replaces the object X is defined only within the scope of a
single repository.

The exception in reachability rule around these replacement objects
is also local to a repository (i.e. if traversal from refs reaches
X, then both X and Y are reachable and need to be kept from gc).

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
2018-04-11 17:21:05 -07:00
committed by Junio C Hamano
parent f37b9bc00c
commit d88f9fdf8b
3 changed files with 24 additions and 10 deletions
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8
object-store.h
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@ -1,6 +1,8 @@
#ifndef OBJECT_STORE_H
#define OBJECT_STORE_H
#include "oidmap.h"
struct alternate_object_database {
struct alternate_object_database *next;
@ -93,6 +95,12 @@ struct raw_object_store {
struct alternate_object_database *alt_odb_list;
struct alternate_object_database **alt_odb_tail;
/*
* Objects that should be substituted by other objects
* (see git-replace(1)).
*/
struct oidmap replace_map;
/*
* private data
*