Merge branch 'en/rebase-i-microfixes'
[git] / notes-cache.c
1 #include "cache.h"
2 #include "notes-cache.h"
3 #include "object-store.h"
4 #include "commit.h"
5 #include "refs.h"
6
7 static int notes_cache_match_validity(const char *ref, const char *validity)
8 {
9         struct object_id oid;
10         struct commit *commit;
11         struct pretty_print_context pretty_ctx;
12         struct strbuf msg = STRBUF_INIT;
13         int ret;
14
15         if (read_ref(ref, &oid) < 0)
16                 return 0;
17
18         commit = lookup_commit_reference_gently(&oid, 1);
19         if (!commit)
20                 return 0;
21
22         memset(&pretty_ctx, 0, sizeof(pretty_ctx));
23         format_commit_message(commit, "%s", &msg, &pretty_ctx);
24         strbuf_trim(&msg);
25
26         ret = !strcmp(msg.buf, validity);
27         strbuf_release(&msg);
28
29         return ret;
30 }
31
32 void notes_cache_init(struct notes_cache *c, const char *name,
33                      const char *validity)
34 {
35         struct strbuf ref = STRBUF_INIT;
36         int flags = NOTES_INIT_WRITABLE;
37
38         memset(c, 0, sizeof(*c));
39         c->validity = xstrdup(validity);
40
41         strbuf_addf(&ref, "refs/notes/%s", name);
42         if (!notes_cache_match_validity(ref.buf, validity))
43                 flags |= NOTES_INIT_EMPTY;
44         init_notes(&c->tree, ref.buf, combine_notes_overwrite, flags);
45         strbuf_release(&ref);
46 }
47
48 int notes_cache_write(struct notes_cache *c)
49 {
50         struct object_id tree_oid, commit_oid;
51
52         if (!c || !c->tree.initialized || !c->tree.update_ref ||
53             !*c->tree.update_ref)
54                 return -1;
55         if (!c->tree.dirty)
56                 return 0;
57
58         if (write_notes_tree(&c->tree, &tree_oid))
59                 return -1;
60         if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
61                         &commit_oid, NULL, NULL) < 0)
62                 return -1;
63         if (update_ref("update notes cache", c->tree.update_ref, &commit_oid,
64                        NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
65                 return -1;
66
67         return 0;
68 }
69
70 char *notes_cache_get(struct notes_cache *c, struct object_id *key_oid,
71                       size_t *outsize)
72 {
73         const struct object_id *value_oid;
74         enum object_type type;
75         char *value;
76         unsigned long size;
77
78         value_oid = get_note(&c->tree, key_oid);
79         if (!value_oid)
80                 return NULL;
81         value = read_object_file(value_oid, &type, &size);
82
83         *outsize = size;
84         return value;
85 }
86
87 int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
88                     const char *data, size_t size)
89 {
90         struct object_id value_oid;
91
92         if (write_object_file(data, size, "blob", &value_oid) < 0)
93                 return -1;
94         return add_note(&c->tree, key_oid, &value_oid, NULL);
95 }