notes-cache.c

   1 #define USE_THE_REPOSITORY_VARIABLE
   2
   3 #include "git-compat-util.h"
   4 #include "notes-cache.h"
   5 #include "object-store-ll.h"
   6 #include "pretty.h"
   7 #include "repository.h"
   8 #include "commit.h"
   9 #include "refs.h"
  10 #include "strbuf.h"
  11
  12 static int notes_cache_match_validity(struct repository *r,
  13                                       const char *ref,
  14                                       const char *validity)
  15 {
  16         struct object_id oid;
  17         struct commit *commit;
  18         struct pretty_print_context pretty_ctx;
  19         struct strbuf msg = STRBUF_INIT;
  20         int ret;
  21
  22         if (refs_read_ref(get_main_ref_store(the_repository), ref, &oid) < 0)
  23                 return 0;
  24
  25         commit = lookup_commit_reference_gently(r, &oid, 1);
  26         if (!commit)
  27                 return 0;
  28
  29         memset(&pretty_ctx, 0, sizeof(pretty_ctx));
  30         repo_format_commit_message(r, commit, "%s", &msg,
  31                                    &pretty_ctx);
  32         strbuf_trim(&msg);
  33
  34         ret = !strcmp(msg.buf, validity);
  35         strbuf_release(&msg);
  36
  37         return ret;
  38 }
  39
  40 void notes_cache_init(struct repository *r, struct notes_cache *c,
  41                       const char *name, const char *validity)
  42 {
  43         struct strbuf ref = STRBUF_INIT;
  44         int flags = NOTES_INIT_WRITABLE;
  45
  46         memset(c, 0, sizeof(*c));
  47         c->validity = xstrdup(validity);
  48
  49         strbuf_addf(&ref, "refs/notes/%s", name);
  50         if (!notes_cache_match_validity(r, ref.buf, validity))
  51                 flags |= NOTES_INIT_EMPTY;
  52         init_notes(&c->tree, ref.buf, combine_notes_overwrite, flags);
  53         strbuf_release(&ref);
  54 }
  55
  56 int notes_cache_write(struct notes_cache *c)
  57 {
  58         struct object_id tree_oid, commit_oid;
  59
  60         if (!c || !c->tree.initialized || !c->tree.update_ref ||
  61             !*c->tree.update_ref)
  62                 return -1;
  63         if (!c->tree.dirty)
  64                 return 0;
  65
  66         if (write_notes_tree(&c->tree, &tree_oid))
  67                 return -1;
  68         if (commit_tree(c->validity, strlen(c->validity), &tree_oid, NULL,
  69                         &commit_oid, NULL, NULL) < 0)
  70                 return -1;
  71         if (refs_update_ref(get_main_ref_store(the_repository), "update notes cache", c->tree.update_ref, &commit_oid,
  72                             NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
  73                 return -1;
  74
  75         return 0;
  76 }
  77
  78 char *notes_cache_get(struct notes_cache *c, struct object_id *key_oid,
  79                       size_t *outsize)
  80 {
  81         const struct object_id *value_oid;
  82         enum object_type type;
  83         char *value;
  84         unsigned long size;
  85
  86         value_oid = get_note(&c->tree, key_oid);
  87         if (!value_oid)
  88                 return NULL;
  89         value = repo_read_object_file(the_repository, value_oid, &type, &size);
  90
  91         *outsize = size;
  92         return value;
  93 }
  94
  95 int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
  96                     const char *data, size_t size)
  97 {
  98         struct object_id value_oid;
  99
 100         if (write_object_file(data, size, OBJ_BLOB, &value_oid) < 0)
 101                 return -1;
 102         return add_note(&c->tree, key_oid, &value_oid, NULL);
 103 }