Start preparing for 1.8.4.2
[alt-git.git] / notes-cache.c
blobeabe4a0d9bf44050dba43cbd821642cdfd3fb40b
1 #include "cache.h"
2 #include "notes-cache.h"
3 #include "commit.h"
4 #include "refs.h"
6 static int notes_cache_match_validity(const char *ref, const char *validity)
8 unsigned char sha1[20];
9 struct commit *commit;
10 struct pretty_print_context pretty_ctx;
11 struct strbuf msg = STRBUF_INIT;
12 int ret;
14 if (read_ref(ref, sha1) < 0)
15 return 0;
17 commit = lookup_commit_reference_gently(sha1, 1);
18 if (!commit)
19 return 0;
21 memset(&pretty_ctx, 0, sizeof(pretty_ctx));
22 format_commit_message(commit, "%s", &msg, &pretty_ctx);
23 strbuf_trim(&msg);
25 ret = !strcmp(msg.buf, validity);
26 strbuf_release(&msg);
28 return ret;
31 void notes_cache_init(struct notes_cache *c, const char *name,
32 const char *validity)
34 struct strbuf ref = STRBUF_INIT;
35 int flags = 0;
37 memset(c, 0, sizeof(*c));
38 c->validity = xstrdup(validity);
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);
47 int notes_cache_write(struct notes_cache *c)
49 unsigned char tree_sha1[20];
50 unsigned char commit_sha1[20];
51 struct strbuf msg = STRBUF_INIT;
53 if (!c || !c->tree.initialized || !c->tree.ref || !*c->tree.ref)
54 return -1;
55 if (!c->tree.dirty)
56 return 0;
58 if (write_notes_tree(&c->tree, tree_sha1))
59 return -1;
60 strbuf_attach(&msg, c->validity,
61 strlen(c->validity), strlen(c->validity) + 1);
62 if (commit_tree(&msg, tree_sha1, NULL, commit_sha1, NULL, NULL) < 0)
63 return -1;
64 if (update_ref("update notes cache", c->tree.ref, commit_sha1, NULL,
65 0, QUIET_ON_ERR) < 0)
66 return -1;
68 return 0;
71 char *notes_cache_get(struct notes_cache *c, unsigned char key_sha1[20],
72 size_t *outsize)
74 const unsigned char *value_sha1;
75 enum object_type type;
76 char *value;
77 unsigned long size;
79 value_sha1 = get_note(&c->tree, key_sha1);
80 if (!value_sha1)
81 return NULL;
82 value = read_sha1_file(value_sha1, &type, &size);
84 *outsize = size;
85 return value;
88 int notes_cache_put(struct notes_cache *c, unsigned char key_sha1[20],
89 const char *data, size_t size)
91 unsigned char value_sha1[20];
93 if (write_sha1_file(data, size, "blob", value_sha1) < 0)
94 return -1;
95 return add_note(&c->tree, key_sha1, value_sha1, NULL);