git/object-store.h

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#ifndef OBJECT_STORE_H
#define OBJECT_STORE_H
#include "khash.h"
#include "dir.h"
#include "object-store-ll.h"
object-file.c: add "stream_loose_object()" to handle large object If we want unpack and write a loose object using "write_loose_object", we have to feed it with a buffer with the same size of the object, which will consume lots of memory and may cause OOM. This can be improved by feeding data to "stream_loose_object()" in a stream. Add a new function "stream_loose_object()", which is a stream version of "write_loose_object()" but with a low memory footprint. We will use this function to unpack large blob object in later commit. Another difference with "write_loose_object()" is that we have no chance to run "write_object_file_prepare()" to calculate the oid in advance. In "write_loose_object()", we know the oid and we can write the temporary file in the same directory as the final object, but for an object with an undetermined oid, we don't know the exact directory for the object. Still, we need to save the temporary file we're preparing somewhere. We'll do that in the top-level ".git/objects/" directory (or whatever "GIT_OBJECT_DIRECTORY" is set to). Once we've streamed it we'll know the OID, and will move it to its canonical path. "freshen_packed_object()" or "freshen_loose_object()" will be called inside "stream_loose_object()" after obtaining the "oid". After the temporary file is written, we wants to mark the object to recent and we may find that where indeed is already the object. We should remove the temporary and do not leave a new copy of the object. Helped-by: René Scharfe <l.s.r@web.de> Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Helped-by: Jiang Xin <zhiyou.jx@alibaba-inc.com> Signed-off-by: Han Xin <chiyutianyi@gmail.com> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-11 02:44:19 +00:00
KHASH_INIT(odb_path_map, const char * /* key: odb_path */,
struct object_directory *, 1, fspathhash, fspatheq)
#endif /* OBJECT_STORE_H */