fix-sls-offline.js

/* eslint-disable no-console */
const fs = require('fs');

const LINE_NUMBER = 6;
const FILE_LOCATION = 'node_modules/hapi/lib/defaults.js';
const INJECT_FIX_STRING = `
var isWin = process.platform === "win32";
var isLinux = process.platform === "linux";
var isDarwin = process.platform === "darwin";
if (isDarwin || isLinux) {
  Os.tmpDir = Os.tmpdir;
} else if (isWin) {
   Os.tmpDir = os.tmpDir;
}
`;

let data = fs.readFileSync(FILE_LOCATION);
if (data.includes(INJECT_FIX_STRING)) {
  console.log('Skipping fix injection, already exists.');
} else {
  data = data.toString().split('\n');
  data.splice(LINE_NUMBER, 0, INJECT_FIX_STRING);
  const text = data.join('\n');

  fs.writeFile(FILE_LOCATION, text, (err) => {
    if (err) {
      return console.log(err);
    }
    return console.log('Injected fix successfully');
  });
}