Andrew's git / gitweb.git / notes-cache.c
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notes-cache.con commit refs.c: change ref_transaction_update() to do error checking and return status (8e34800)
   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        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
  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 = 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
  47int 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, UPDATE_REFS_QUIET_ON_ERR) < 0)
  66                return -1;
  67
  68        return 0;
  69}
  70
  71char *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
  88int 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}