Function cbm_artifact_commit

src/pipeline/artifact.c:807–842

/* ── Commit hash extraction ──────────────────────────────────────── */

char *cbm_artifact_commit(const char *repo_path) {
    if (!repo_path) {
        return NULL;
    }

    char meta_path[CBM_SZ_4K];
    artifact_path(meta_path, sizeof(meta_path), repo_path, CBM_ARTIFACT_META);

    size_t len = 0;
    char *json = read_file_alloc(meta_path, &len);
    if (!json) {
        return NULL;
    }

    yyjson_doc *doc = yyjson_read(json, len, 0);
    free(json);
    if (!doc) {
        return NULL;
    }

    yyjson_val *root = yyjson_doc_get_root(doc);
    yyjson_val *val = yyjson_obj_get(root, "commit");
    char *result = NULL;
    if (val) {
        const char *s = yyjson_get_str(val);
        if (s && s[0]) {
            size_t slen = strlen(s);
            result = malloc(slen + ART_NUL);
            if (result) {
                memcpy(result, s, slen + ART_NUL);
            }
        }
    }
    yyjson_doc_free(doc);
    return result;
}