superstatic/lib/loaders/config-file.js

A static file server for fancy apps

"use strict";
/**
 * Copyright (c) 2022 Google LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
const fs = require("fs");
const _ = require("lodash");
const join = require("join-path");
const path = require("path");
const CONFIG_FILE = ["superstatic.json", "firebase.json"];
module.exports = function (filename) {
    if (_.isFunction(filename)) {
        return filename;
    }
    filename = filename || CONFIG_FILE;
    let configObject = {};
    let config = {};
    // From custom config data passed in
    try {
        configObject = JSON.parse(filename);
    }
    catch (e) {
        if (_.isPlainObject(filename)) {
            configObject = filename;
            filename = CONFIG_FILE;
        }
    }
    if (_.isArray(filename)) {
        filename = _.find(filename, (name) => {
            return fs.existsSync(join(process.cwd(), name));
        });
    }
    // Set back to default config file if stringified object is
    // given as config. With this, we override values in the config file
    if (_.isPlainObject(filename)) {
        filename = CONFIG_FILE;
    }
    // A file name or array of file names
    if (_.isString(filename) && _.endsWith(filename, "json")) {
        try {
            config = JSON.parse(fs.readFileSync(path.resolve(filename)));
            config = config.hosting ? config.hosting : config;
        }
        catch (e) {
            // do nothing
        }
    }
    // Passing an object as the config value merges
    // the config data
    return _.assign(config, configObject);
};