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file 97 lines (78 sloc) 2.282 kb
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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)
{
unsigned char sha1[20];
struct commit *commit;
struct pretty_print_context pretty_ctx;
struct strbuf msg = STRBUF_INIT;
int ret;

if (read_ref(ref, sha1) < 0)
return 0;

commit = lookup_commit_reference_gently(sha1, 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 = 0;

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)
{
unsigned char tree_sha1[20];
unsigned char commit_sha1[20];
struct strbuf msg = STRBUF_INIT;

if (!c || !c->tree.initialized || !c->tree.ref || !*c->tree.ref)
return -1;
if (!c->tree.dirty)
return 0;

if (write_notes_tree(&c->tree, tree_sha1))
return -1;
strbuf_attach(&msg, c->validity,
strlen(c->validity), strlen(c->validity) + 1);
if (commit_tree(&msg, tree_sha1, NULL, commit_sha1, NULL, NULL) < 0)
return -1;
if (update_ref("update notes cache", c->tree.ref, commit_sha1, NULL,
0, QUIET_ON_ERR) < 0)
return -1;

return 0;
}

char *notes_cache_get(struct notes_cache *c, unsigned char key_sha1[20],
size_t *outsize)
{
const unsigned char *value_sha1;
enum object_type type;
char *value;
unsigned long size;

value_sha1 = get_note(&c->tree, key_sha1);
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, unsigned char key_sha1[20],
const char *data, size_t size)
{
unsigned char value_sha1[20];

if (write_sha1_file(data, size, "blob", value_sha1) < 0)
return -1;
return add_note(&c->tree, key_sha1, value_sha1, NULL);
}
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