Function parse_extra_extensions

src/discover/userconfig.c:168–227

* Parse extra_extensions from a yyjson object root. * Appends valid entries to *entries / *count (growing via realloc). * Project-level entries (from_project=true) are appended after global * entries so that a later dedup pass can prefer project values. * * Returns 0 on success, -1 on alloc failure. */

 * Returns 0 on success, -1 on alloc failure.
 */
static int parse_extra_extensions(yyjson_val *root, cbm_userext_t **entries, int *count,
                                  const char *source_label) {
    if (!yyjson_is_obj(root)) {
        cbm_log_warn("userconfig.bad_root", "file", source_label);
        return 0;
    }

    yyjson_val *extra = yyjson_obj_get(root, "extra_extensions");
    if (!extra) {
        return 0; /* key absent — fine */
    }
    if (!yyjson_is_obj(extra)) {
        cbm_log_warn("userconfig.bad_extra_extensions", "file", source_label);
        return 0;
    }

    yyjson_obj_iter iter;
    yyjson_obj_iter_init(extra, &iter);
    yyjson_val *key;
    while ((key = yyjson_obj_iter_next(&iter)) != NULL) {
        yyjson_val *val = yyjson_obj_iter_get_val(key);

        const char *ext_str = yyjson_get_str(key);
        const char *lang_str = yyjson_get_str(val);

        if (!ext_str || !lang_str) {
            cbm_log_warn("userconfig.skip_non_string", "file", source_label);
            continue;
        }

        /* Extension must start with '.' */
        if (ext_str[0] != '.') {
            cbm_log_warn("userconfig.skip_bad_ext", "file", source_label, "ext", ext_str);
            continue;
        }

        CBMLanguage lang = lang_from_string(lang_str);
        if (lang == CBM_LANG_COUNT) {
            cbm_log_warn("userconfig.unknown_lang", "file", source_label, "lang", lang_str);
            continue; /* fail-open: skip unknown languages */
        }

        /* Grow the array */
        cbm_userext_t *tmp = realloc(*entries, (size_t)(*count + SKIP_ONE) * sizeof(cbm_userext_t));
        if (!tmp) {
            return CBM_NOT_FOUND;
        }
        *entries = tmp;

        char *ext_copy = strdup(ext_str);
        if (!ext_copy) {
            return CBM_NOT_FOUND;
        }

        (*entries)[*count].ext = ext_copy;
        (*entries)[*count].lang = lang;
        (*count)++;
    }