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         unsigned char sha1[20];
   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, sha1) < 0)
  15                 return 0;
  16
  17         commit = lookup_commit_reference_gently(sha1, 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 = 0;
  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         unsigned char tree_sha1[20];
  50         unsigned char commit_sha1[20];
  51         struct strbuf msg = STRBUF_INIT;
  52
  53         if (!c || !c->tree.initialized || !c->tree.ref || !*c->tree.ref)
  54                 return -1;
  55         if (!c->tree.dirty)
  56                 return 0;
  57
  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;
  67
  68         return 0;
  69 }
  70
  71 char *notes_cache_get(struct notes_cache *c, unsigned char key_sha1[20],
  72                       size_t *outsize)
  73 {
  74         const unsigned char *value_sha1;
  75         enum object_type type;
  76         char *value;
  77         unsigned long size;
  78
  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);
  83
  84         *outsize = size;
  85         return value;
  86 }
  87
  88 int notes_cache_put(struct notes_cache *c, unsigned char key_sha1[20],
  89                     const char *data, size_t size)
  90 {
  91         unsigned char value_sha1[20];
  92
  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);
  96 }