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https://github.com/git/git
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23b2c7e95b
As part of the transition plan, we'd like to add a file in the .git directory that maps loose objects between SHA-1 and SHA-256. Let's implement the specification in the transition plan and store this data on a per-repository basis in struct repository. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
#include "git-compat-util.h"
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#include "gettext.h"
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#include "strbuf.h"
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#include "repository.h"
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#include "hash-ll.h"
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#include "object.h"
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#include "loose.h"
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#include "object-file-convert.h"
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int repo_oid_to_algop(struct repository *repo, const struct object_id *src,
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const struct git_hash_algo *to, struct object_id *dest)
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{
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/*
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* If the source algorithm is not set, then we're using the
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* default hash algorithm for that object.
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*/
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const struct git_hash_algo *from =
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src->algo ? &hash_algos[src->algo] : repo->hash_algo;
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if (from == to) {
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if (src != dest)
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oidcpy(dest, src);
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return 0;
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}
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if (repo_loose_object_map_oid(repo, src, to, dest)) {
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/*
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* We may have loaded the object map at repo initialization but
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* another process (perhaps upstream of a pipe from us) may have
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* written a new object into the map. If the object is missing,
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* let's reload the map to see if the object has appeared.
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*/
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repo_read_loose_object_map(repo);
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if (repo_loose_object_map_oid(repo, src, to, dest))
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return -1;
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}
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return 0;
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}
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int convert_object_file(struct strbuf *outbuf,
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const struct git_hash_algo *from,
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const struct git_hash_algo *to,
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const void *buf, size_t len,
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enum object_type type,
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int gentle)
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{
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int ret;
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/* Don't call this function when no conversion is necessary */
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if ((from == to) || (type == OBJ_BLOB))
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BUG("Refusing noop object file conversion");
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switch (type) {
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case OBJ_COMMIT:
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case OBJ_TREE:
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case OBJ_TAG:
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default:
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/* Not implemented yet, so fail. */
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ret = -1;
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break;
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}
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if (!ret)
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return 0;
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if (gentle) {
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strbuf_release(outbuf);
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return ret;
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}
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die(_("Failed to convert object from %s to %s"),
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from->name, to->name);
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}
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