Redownload the server in dev if the required version has changed

package.json

@@ -30,6 +30,7 @@
   "devDependencies": {
     "@types/electron-devtools-installer": "^2.0.2",
     "@types/electron-window-state": "^2.0.33",
+    "@types/lodash": "^4.14.119",
     "@types/node": "^10.12.10",
     "@types/node-fetch": "^2.1.4",
     "@types/react": "^0.14.55",
@@ -42,10 +43,12 @@
     "electron-forge": "^5.2.3",
     "electron-prebuilt-compile": "4.0.0",
     "httptoolkit-server": "^0.1.1",
+    "lodash": "^4.17.11",
     "node-fetch": "^2.3.0",
     "react": "^15.4.1",
     "react-dom": "^15.4.1",
     "react-hot-loader": "^3.0.0-beta.6",
+    "rimraf": "^2.6.3",
     "targz": "^1.0.1",
     "ts-node": "^7.0.1",
     "tslint": "^5.1.0",

setup-dev.js

@@ -3,17 +3,26 @@ require('ts-node/register');
 const { promisify } = require('util');
 const os = require('os');
 const fs = require('fs');
+const rimraf = require('rimraf');
+const insertServer = promisify(require('./src/after-copy-insert-server'));
+
 const canAccess = (file) => promisify(fs.access)(file).then(() => true).catch(() => false);
+const deleteDir = promisify(rimraf);
+
+const packageJsonLock = require('./package-lock.json');
+const requiredServerVersion = packageJsonLock.dependencies['httptoolkit-server'].version;
 
+// Manually trigger the after-copy hook, to give us an env like the real package
 async function setUpDevEnv() {
-    // Manually trigger the after-copy hook, to give us an env like the real package
-    const afterCopy = promisify(require('./src/after-copy-insert-server'));
+    const serverExists = await canAccess('./httptoolkit-server');
+    const serverVersion = serverExists ? require('./httptoolkit-server/package.json').version : null;
 
-    if (!await canAccess('./httptoolkit-server')) {
-        await afterCopy(__dirname, '', os.platform(), os.arch());
+    if (serverVersion !== requiredServerVersion) {
+        if (serverExists) await deleteDir('./httptoolkit-server');
+        await insertServer(__dirname, '', os.platform(), os.arch());
         console.log('Dev setup completed.');
     } else {
-        console.log('Server already downloaded, nothing to do.');
+        console.log('Correct server already downloaded, nothing to do.');
     }
 }