[skip ci] feat(generator): allow user to select electron version

Author: nklayman

generator/index.js

@@ -1,6 +1,6 @@
 const fs = require('fs')
 
-module.exports = api => {
+module.exports = (api, options = {}) => {
   const usesTS = api.hasPlugin('typescript')
   const hasBackground =
     fs.existsSync(api.resolve(`./src/background.ts`)) ||
@@ -72,15 +72,18 @@ module.exports = api => {
     // Create new postinstall script
     postinstallScript = 'electron-builder install-app-deps'
   }
+  const devDependencies = {}
+  if (options.electronBuilder && options.electronBuilder.electronVersion) {
+    // Use provided electron version
+    devDependencies.electron = options.electronBuilder.electronVersion
+  }
   api.extendPackage({
     scripts: {
       'electron:build': 'vue-cli-service electron:build',
       'electron:serve': 'vue-cli-service electron:serve',
       postinstall: postinstallScript
     },
-    devDependencies: {
-      electron: '^2.0.2'
-    },
+    devDependencies,
     main: 'background.js'
   })
 }

prompts.js

@@ -0,0 +1,32 @@
+const path = require('path')
+
+module.exports = [
+  {
+    name: 'electronBuilder.electronVersion',
+    type: 'list',
+    message: 'Choose Electron Version',
+    choices: [
+      {
+        name: '^2.0.0 (stable)',
+        value: '^2.0.0',
+        short: '^2.0.0'
+      },
+      {
+        name: '^3.0.0 (may have small issues)',
+        value: '^3.0.0',
+        short: '^3.0.0'
+      }
+    ],
+    when: () => {
+      try {
+        // Attempt to read package.json
+        const pkg = require(path.join(process.cwd(), 'package.json'))
+        // Don't show if electron version is already set
+        return !pkg.devDependencies.electron
+      } catch (e) {
+        console.log('Unable to read package.json')
+        return true
+      }
+    }
+  }
+]