Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "notes-cache.h"
   3#include "commit.h"
   4#include "refs.h"
   5
   6static int notes_cache_match_validity(const char *ref, const char *validity)
   7{
   8        struct object_id oid;
   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, oid.hash) < 0)
  15                return 0;
  16
  17        commit = lookup_commit_reference_gently(&oid, 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
  31void notes_cache_init(struct notes_cache *c, const char *name,
  32                     const char *validity)
  33{
  34        struct strbuf ref = STRBUF_INIT;
  35        int flags = NOTES_INIT_WRITABLE;
  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
  47int notes_cache_write(struct notes_cache *c)
  48{
  49        struct object_id tree_oid, commit_oid;
  50
  51        if (!c || !c->tree.initialized || !c->tree.update_ref ||
  52            !*c->tree.update_ref)
  53                return -1;
  54        if (!c->tree.dirty)
  55                return 0;
  56
  57        if (write_notes_tree(&c->tree, tree_oid.hash))
  58                return -1;
  59        if (commit_tree(c->validity, strlen(c->validity), tree_oid.hash, NULL,
  60                        commit_oid.hash, NULL, NULL) < 0)
  61                return -1;
  62        if (update_ref("update notes cache", c->tree.update_ref, commit_oid.hash,
  63                       NULL, 0, UPDATE_REFS_QUIET_ON_ERR) < 0)
  64                return -1;
  65
  66        return 0;
  67}
  68
  69char *notes_cache_get(struct notes_cache *c, struct object_id *key_oid,
  70                      size_t *outsize)
  71{
  72        const unsigned char *value_sha1;
  73        enum object_type type;
  74        char *value;
  75        unsigned long size;
  76
  77        value_sha1 = get_note(&c->tree, key_oid->hash);
  78        if (!value_sha1)
  79                return NULL;
  80        value = read_sha1_file(value_sha1, &type, &size);
  81
  82        *outsize = size;
  83        return value;
  84}
  85
  86int notes_cache_put(struct notes_cache *c, struct object_id *key_oid,
  87                    const char *data, size_t size)
  88{
  89        struct object_id value_oid;
  90
  91        if (write_sha1_file(data, size, "blob", value_oid.hash) < 0)
  92                return -1;
  93        return add_note(&c->tree, key_oid->hash, value_oid.hash, NULL);
  94}