notes-cache: convert to struct object_id
[git/git.git] / notes-cache.c
1 #include "cache.h"
2 #include "notes-cache.h"
3 #include "commit.h"
4 #include "refs.h"
5
6 static int notes_cache_match_validity(const char *ref, const char *validity)
7 {
8 struct object_id oid;
9 struct commit *commit;
10 struct pretty_print_context pretty_ctx;
11 struct strbuf msg = STRBUF_INIT;
12 int ret;
13
14 if (read_ref(ref, oid.hash) < 0)
15 return 0;
16
17 commit = lookup_commit_reference_gently(oid.hash, 1);
18 if (!commit)
19 return 0;
20
21 memset(&pretty_ctx, 0, sizeof(pretty_ctx));
22 format_commit_message(commit, "%s", &msg, &pretty_ctx);
23 strbuf_trim(&msg);
24
25 ret = !strcmp(msg.buf, validity);
26 strbuf_release(&msg);
27
28 return ret;
29 }
30
31 void notes_cache_init(struct notes_cache *c, const char *name,
32 const char *validity)
33 {
34 struct strbuf ref = STRBUF_INIT;
35 int flags = NOTES_INIT_WRITABLE;
36
37 memset(c, 0, sizeof(*c));
38 c->validity = xstrdup(validity);
39
40 strbuf_addf(&ref, "refs/notes/%s", name);
41 if (!notes_cache_match_validity(ref.buf, validity))
42 flags |= NOTES_INIT_EMPTY;
43 init_notes(&c->tree, ref.buf, combine_notes_overwrite, flags);
44 strbuf_release(&ref);
45 }
46
47 int notes_cache_write(struct notes_cache *c)
48 {
49 struct object_id tree_oid, commit_oid;
50
51 if (!c || !c->tree.initialized || !c->tree.update_ref ||
52 !*c->tree.update_ref)
53 return -1;
54 if (!c->tree.dirty)
55 return 0;
56
57 if (write_notes_tree(&c->tree, tree_oid.hash))
58 return -1;
59 if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
60 commit_oid.hash, NULL, NULL) < 0)
61 return -1;
62 if (update_ref("update notes cache", c->tree.update_ref, commit_oid.hash,
63 NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
64 return -1;
65
66 return 0;
67 }
68
69 char *notes_cache_get(struct notes_cache *c, struct object_id *key_oid,
70 size_t *outsize)
71 {
72 const unsigned char *value_sha1;
73 enum object_type type;
74 char *value;
75 unsigned long size;
76
77 value_sha1 = get_note(&c->tree, key_oid->hash);
78 if (!value_sha1)
79 return NULL;
80 value = read_sha1_file(value_sha1, &type, &size);
81
82 *outsize = size;
83 return value;
84 }
85
86 int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
87 const char *data, size_t size)
88 {
89 struct object_id value_oid;
90
91 if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
92 return -1;
93 return add_note(&c->tree, key_oid->hash, value_oid.hash, NULL);
94 }