less/lib/less-node/environment.js

Leaner CSS

import { createRequire } from 'module';

const require = createRequire(import.meta.url);

class SourceMapGeneratorFallback {
    addMapping(){}
    setSourceContent(){}
    toJSON(){
        return null;
    }
}

export default {
    encodeBase64: function encodeBase64(str) {
        // Avoid Buffer constructor on newer versions of Node.js.
        const buffer = (Buffer.from ? Buffer.from(str) : (new Buffer(str)));
        return buffer.toString('base64');
    },
    mimeLookup: function (filename) {
        try {
            const mimeModule = require('mime');
            return mimeModule ? mimeModule.lookup(filename) : 'application/octet-stream';
        } catch (e) {
            return 'application/octet-stream';
        }
    },
    charsetLookup: function (mime) {
        try {
            const mimeModule = require('mime');
            return mimeModule ? mimeModule.charsets.lookup(mime) : undefined;
        } catch (e) {
            return undefined;
        }
    },
    getSourceMapGenerator: function getSourceMapGenerator() {
        try {
            const sourceMapModule = require('source-map');
            return sourceMapModule ? sourceMapModule.SourceMapGenerator : SourceMapGeneratorFallback;
        } catch (e) {
            return SourceMapGeneratorFallback;
        }
    }
};