builtin/clone: allow remote helpers to detect repo
[alt-git.git] / replace-object.h
blob66c41b938b44f4ba0a94521c4344aca0ca19087e
1 #ifndef REPLACE_OBJECT_H
2 #define REPLACE_OBJECT_H
4 #include "oidmap.h"
5 #include "repository.h"
6 #include "object-store-ll.h"
8 struct replace_object {
9 struct oidmap_entry original;
10 struct object_id replacement;
13 void prepare_replace_object(struct repository *r);
16 * This internal function is only declared here for the benefit of
17 * lookup_replace_object(). Please do not call it directly.
19 const struct object_id *do_lookup_replace_object(struct repository *r,
20 const struct object_id *oid);
23 * Some commands disable replace-refs unconditionally, and otherwise each
24 * repository could alter the core.useReplaceRefs config value.
26 * Return 1 if and only if all of the following are true:
28 * a. disable_replace_refs() has not been called.
29 * b. GIT_NO_REPLACE_OBJECTS is unset or zero.
30 * c. the given repository does not have core.useReplaceRefs=false.
32 int replace_refs_enabled(struct repository *r);
35 * If object sha1 should be replaced, return the replacement object's
36 * name (replaced recursively, if necessary). The return value is
37 * either sha1 or a pointer to a permanently-allocated value. When
38 * object replacement is suppressed, always return sha1.
40 * Note: some thread debuggers might point a data race on the
41 * replace_map_initialized reading in this function. However, we know there's no
42 * problem in the value being updated by one thread right after another one read
43 * it here (and it should be written to only once, anyway).
45 static inline const struct object_id *lookup_replace_object(struct repository *r,
46 const struct object_id *oid)
48 if (!replace_refs_enabled(r) ||
49 (r->objects->replace_map_initialized &&
50 r->objects->replace_map->map.tablesize == 0))
51 return oid;
52 return do_lookup_replace_object(r, oid);
56 * Some commands override config and environment settings for using
57 * replace references. Use this method to disable the setting and ensure
58 * those other settings will not override this choice. This applies
59 * globally to all in-process repositories.
61 void disable_replace_refs(void);
63 #endif /* REPLACE_OBJECT_H */