rollup.config.js

import {readFileSync} from 'fs';
import common from '@rollup/plugin-commonjs';
import nodeResolve from '@rollup/plugin-node-resolve';
import yaml from '@rollup/plugin-yaml';

var banner = readFileSync('./src/banner.js', 'utf-8');
var dependencies = process.env.DEPS === 'YES';

function recursivelyDeleteNominatimUrl(data) {
    if (typeof data === 'object') {
        Object.values(data).forEach(recursivelyDeleteNominatimUrl);
    }
    delete data._nominatim_url;
    return data;
}

var yamlPlugin = yaml({
    transform(data) {
        return recursivelyDeleteNominatimUrl(data);
    }
})

export default {
    input: './src/index',
    plugins: dependencies ? [
        nodeResolve(),
        common(),
        yamlPlugin,
    ] : [
        yamlPlugin,
    ],
    external: dependencies ? [] : [
        'i18next',
        'suncalc'
    ],
    output: {
        name: 'opening_hours',
        banner: banner,
        globals: dependencies ? {} : {
            'i18next': 'i18next',
            'suncalc': 'SunCalc'
        },
        format: 'umd',
        file: 'build/' + (dependencies ? 'opening_hours+deps.js' : 'opening_hours.js'),
    }
};