counterfact/dist/util/load-config-file.js

Generate a TypeScript-based mock server from an OpenAPI spec in seconds — with stateful routes, hot reload, and REPL support.

import { load as loadYaml } from "js-yaml";
import { readFile } from "./read-file.js";
function kebabToCamel(str) {
    return str.replace(/-([a-z])/g, (_, letter) => letter.toUpperCase());
}
function normalizeKeys(obj) {
    return Object.fromEntries(Object.entries(obj).map(([key, value]) => [kebabToCamel(key), value]));
}
/**
 * Loads and parses a counterfact YAML config file.
 *
 * @param configPath - Absolute or relative path to the config file.
 * @param required - When true, throws if the file does not exist.
 *                   When false (default), returns an empty object for missing files.
 * @returns A plain object of config keys (camelCase) to values.
 */
export async function loadConfigFile(configPath, required = false) {
    let content;
    try {
        content = await readFile(configPath);
    }
    catch (error) {
        if (typeof error === "object" &&
            error !== null &&
            "code" in error &&
            error.code === "ENOENT") {
            if (required) {
                throw new Error(`Config file not found: ${configPath}`, {
                    cause: error,
                });
            }
            return {};
        }
        throw error;
    }
    const parsed = loadYaml(content);
    if (parsed === null || parsed === undefined) {
        return {};
    }
    if (typeof parsed !== "object" || Array.isArray(parsed)) {
        throw new Error(`Config file must be a YAML object (mapping): ${configPath}`);
    }
    return normalizeKeys(parsed);
}