Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "notes-cache.h"
   3#include "object-store.h"
   4#include "commit.h"
   5#include "refs.h"
   6
   7static 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
  32void 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
  48int 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
  70char *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
  87int 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}