64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
#ifndef REPLACE_OBJECT_H
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#define REPLACE_OBJECT_H
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#include "oidmap.h"
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#include "repository.h"
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#include "object-store-ll.h"
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struct replace_object {
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struct oidmap_entry original;
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struct object_id replacement;
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};
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void prepare_replace_object(struct repository *r);
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/*
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* This internal function is only declared here for the benefit of
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* lookup_replace_object(). Please do not call it directly.
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*/
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const struct object_id *do_lookup_replace_object(struct repository *r,
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const struct object_id *oid);
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/*
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* Some commands disable replace-refs unconditionally, and otherwise each
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* repository could alter the core.useReplaceRefs config value.
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*
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* Return 1 if and only if all of the following are true:
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*
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* a. disable_replace_refs() has not been called.
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* b. GIT_NO_REPLACE_OBJECTS is unset or zero.
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* c. the given repository does not have core.useReplaceRefs=false.
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*/
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int replace_refs_enabled(struct repository *r);
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/*
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* If object sha1 should be replaced, return the replacement object's
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* name (replaced recursively, if necessary). The return value is
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* either sha1 or a pointer to a permanently-allocated value. When
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* object replacement is suppressed, always return sha1.
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*
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* Note: some thread debuggers might point a data race on the
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* replace_map_initialized reading in this function. However, we know there's no
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* problem in the value being updated by one thread right after another one read
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* it here (and it should be written to only once, anyway).
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*/
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static inline const struct object_id *lookup_replace_object(struct repository *r,
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const struct object_id *oid)
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{
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if (!replace_refs_enabled(r) ||
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(r->objects->replace_map_initialized &&
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r->objects->replace_map->map.tablesize == 0))
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return oid;
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return do_lookup_replace_object(r, oid);
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}
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/*
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* Some commands override config and environment settings for using
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* replace references. Use this method to disable the setting and ensure
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* those other settings will not override this choice. This applies
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* globally to all in-process repositories.
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*/
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void disable_replace_refs(void);
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#endif /* REPLACE_OBJECT_H */
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