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#include "cache.h"
#include "notes-cache.h"
#include "commit.h"
#include "refs.h"
static int notes_cache_match_validity(const char *ref, const char *validity)
{
struct object_id oid;
struct commit *commit;
struct pretty_print_context pretty_ctx;
struct strbuf msg = STRBUF_INIT;
int ret;
if (read_ref(ref, oid.hash) < 0)
return 0;
commit = lookup_commit_reference_gently(&oid, 1);
if (!commit)
return 0;
memset(&pretty_ctx, 0, sizeof(pretty_ctx));
format_commit_message(commit, "%s", &msg, &pretty_ctx);
strbuf_trim(&msg);
ret = !strcmp(msg.buf, validity);
strbuf_release(&msg);
return ret;
}
void notes_cache_init(struct notes_cache *c, const char *name,
const char *validity)
{
struct strbuf ref = STRBUF_INIT;
int flags = NOTES_INIT_WRITABLE;
memset(c, 0, sizeof(*c));
c->validity = xstrdup(validity);
strbuf_addf(&ref, "refs/notes/%s", name);
if (!notes_cache_match_validity(ref.buf, validity))
flags |= NOTES_INIT_EMPTY;
init_notes(&c->tree, ref.buf, combine_notes_overwrite, flags);
strbuf_release(&ref);
}
int notes_cache_write(struct notes_cache *c)
{
struct object_id tree_oid, commit_oid;
if (!c || !c->tree.initialized || !c->tree.update_ref ||
!*c->tree.update_ref)
return -1;
if (!c->tree.dirty)
return 0;
if (write_notes_tree(&c->tree, tree_oid.hash))
return -1;
if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
commit_oid.hash, NULL, NULL) < 0)
return -1;
if (update_ref("update notes cache", c->tree.update_ref, commit_oid.hash,
NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
return -1;
return 0;
}
char *notes_cache_get(struct notes_cache *c, struct object_id *key_oid,
size_t *outsize)
{
const unsigned char *value_sha1;
enum object_type type;
char *value;
unsigned long size;
value_sha1 = get_note(&c->tree, key_oid->hash);
if (!value_sha1)
return NULL;
value = read_sha1_file(value_sha1, &type, &size);
*outsize = size;
return value;
}
int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
const char *data, size_t size)
{
struct object_id value_oid;
if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
return -1;
return add_note(&c->tree, key_oid->hash, value_oid.hash, NULL);
}
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