beam-cli/dist/configuration/merge.js

A beautifully simple CLI for running Lighthouse audits on a statically generated (SSG) website

import { defaultOptions } from '../options/defaults.js';
/** Build up the configuration options
 *
 * Order of Preference (lowest -> highest):
 * Defaults -> Config File -> Flags
 */
export const mergeConfigurations = (flags, userConfiguration) => {
    let { lighthouse } = defaultOptions;
    if (userConfiguration.lighthouse) {
        if (Array.isArray(userConfiguration.lighthouse)) {
            /* eslint-disable @typescript-eslint/consistent-type-assertions */
            // ? Disabling the eslint rule for a cleaner and small section of code.
            lighthouse = userConfiguration.lighthouse.map(lhc => ({
                ...defaultOptions.lighthouse,
                ...lhc,
            }));
            /* eslint-enable @typescript-eslint/consistent-type-assertions */
        }
        else {
            lighthouse = {
                ...defaultOptions.lighthouse,
                ...userConfiguration.lighthouse,
            };
        }
    }
    const options = {
        ...defaultOptions,
        ...userConfiguration,
        server: { ...defaultOptions.server, ...userConfiguration.server },
        output: { ...defaultOptions.output, ...userConfiguration.output },
        lighthouse,
    };
    if (flags.dist)
        options.dist = flags.dist;
    if (flags.port)
        options.server.port = flags.port;
    if (flags.urls)
        options.urls = flags.urls.split(',');
    return options;
};