49 lines
1.6 KiB
JavaScript
49 lines
1.6 KiB
JavaScript
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const {errorMessage} = require('../../utils/utils');
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const fs = require('../../core/fs');
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class WebpackConfigReader {
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constructor(options) {
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this.webpackConfigName = options.webpackConfigName;
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}
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async readConfig(callback){
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const dappConfigPath = fs.dappPath('webpack.config.js');
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const defaultConfigPath = fs.embarkPath('lib/modules/pipeline', 'webpack.config.js');
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let config, configPath;
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try {
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if (fs.existsSync(dappConfigPath)) {
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configPath = dappConfigPath;
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delete require.cache[configPath];
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} else {
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configPath = defaultConfigPath;
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}
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config = require(configPath);
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// valid config types: https://webpack.js.org/configuration/configuration-types/
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// + function that returns a config object
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// + function that returns a promise for a config object
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// + array of named config objects
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// + config object
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if (typeof config === 'function') {
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config = await config(this.webpackConfigName);
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} else if (Array.isArray(config)) {
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config = config.filter(cfg => cfg.name === this.webpackConfigName);
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if (!config.length) {
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return callback(`no webpack config has the name '${this.webpackConfigName}'`);
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}
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if (config.length > 1) {
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console.warn(`detected ${config.length} webpack configs having the name '${this.webpackConfigName}', using the first one`);
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}
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config = config[0];
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}
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callback(null, config);
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} catch (e) {
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console.error(`error while loading webpack config ${configPath}`);
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callback(errorMessage(e));
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}
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}
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}
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module.exports = WebpackConfigReader;
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