Replaces all inline `require('path').default` with `import Name from 'path'`

RequireToImport.js

/*
 * Replaces all inline `require('path').default` with `import Name from 'path'`
 * Adding them as imports to the top of the file.
 * Usage: node RequireToImport.js dir [dry]
 */

const glob = require("glob")
const path = require('path');
const fs = require('fs');

function escapeRegExp(string) {
    return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}

(function main() {
    const dirName = process.argv[2];

    if(!dirName) {
        return console.error('Usage: node RequireToImport.js dir [dry]');
    }
    
    const directoryPath = path.join(__dirname, dirName, '**', '*.js');
    glob(directoryPath, {}, function (err, files) {
        if (err) {
            return console.log('Unable to scan directory: ' + err);
        }

        files.forEach(function (fileName) {
            console.log(fileName);
    
            fs.readFile(fileName, 'utf8' , (err, data) => {
                if (err) {
                  return console.error(err)
                }
    
                let contentImports = '';
                let content = data;
                
                let matches = Array.from(data.matchAll(/require\('([^']+)\'\).default/g));
                // remove duplicate requires
                matches = matches.filter((value, index, self) => {
                    return self.findIndex(v => v[0] === value[0]) === index;
                });
                for (const match of matches) {
                    const importPath = match[1];
                    const importName = path.basename(importPath);
                    contentImports += `import ${importName} from '${importPath}'\n`;

                    const oldImport = match[0];
                    content = content.replace(new RegExp(escapeRegExp(oldImport), 'g'), importName);
                }

                content = contentImports + "\n\n" + content;

                if (process.argv[3]) {
                    console.log(fileName + ":\n\n" + content + "\n\n");
                } else {
                    // replace content of fileName
                    fs.writeFile(fileName, content, err => {
                        if (err) {
                            return console.error(err);
                        }
                    })
                }
            })
        });
    });
})();