'use strict'; const fs = require('fs'); const shebangCommand = require('shebang-command'); function readShebang(command) { // Read the first 150 bytes from the file const size = 150; const buffer = Buffer.alloc(size); let fd; try { fd = fs.openSync(command, 'r'); fs.readSync(fd, buffer, 0, size, 0); fs.closeSync(fd); } catch (e) { /* Empty */ } // Attempt to extract shebang (null is returned if not a shebang) return shebangCommand(buffer.toString()); } module.exports = readShebang;