feat: improve prompt flow

Author: yyx990803

packages/@vue/cli/lib/Creator.js

@@ -169,7 +169,7 @@ module.exports = class Creator {
     } else {
       // manual
       options = {
-        packageManager: answers.packageManager,
+        packageManager: answers.packageManager || loadOptions().packageManager,
         plugins: {}
       }
       // run cb registered by prompt modules to finalize the options
@@ -242,7 +242,8 @@ module.exports = class Creator {
 
   resolveOutroPrompts () {
     const outroPrompts = []
-    if (hasYarn) {
+    const savedOptions = loadOptions()
+    if (hasYarn && !savedOptions.packageManager) {
       outroPrompts.push({
         name: 'packageManager',
         when: isMode('manual'),
@@ -266,7 +267,7 @@ module.exports = class Creator {
       name: 'save',
       when: isMode('manual'),
       type: 'confirm',
-      message: 'Save the preferences for future projects?'
+      message: 'Save the preferences for future projects? (You can always manually edit ~/.vuerc)'
     })
     return outroPrompts
   }

packages/@vue/cli/lib/options.js

@@ -32,7 +32,10 @@ exports.defaults = {
   packageManager: hasYarn ? 'yarn' : 'npm',
   plugins: {
     '@vue/cli-plugin-babel': {},
-    '@vue/cli-plugin-eslint': { config: 'base', lintOn: 'save' },
+    '@vue/cli-plugin-eslint': {
+      config: 'base',
+      lintOn: ['save', 'commit']
+    },
     '@vue/cli-plugin-unit-mocha': {}
   }
 }

packages/@vue/cli/lib/promptModules/linter.js

@@ -5,7 +5,8 @@ module.exports = cli => {
   cli.injectFeature({
     name: 'Linter / Formatter',
     value: 'linter',
-    short: 'Linter'
+    short: 'Linter',
+    checked: true
   })
 
   cli.injectPrompt({
@@ -48,11 +49,13 @@ module.exports = cli => {
     choices: [
       {
         name: 'Lint on save',
-        value: 'save'
+        value: 'save',
+        checked: true
       },
       {
         name: 'Lint and fix on commit' + (hasGit ? '' : chalk.red(' (requires Git)')),
-        value: 'commit'
+        value: 'commit',
+        checked: true
       }
     ]
   })

packages/@vue/cli/lib/promptModules/pwa.js

@@ -1,7 +1,8 @@
 module.exports = cli => {
   cli.injectFeature({
     name: 'Progressive Web App (PWA) Support',
-    value: 'pwa'
+    value: 'pwa',
+    short: 'PWA'
   })
 
   cli.onPromptComplete((answers, options) => {

packages/@vue/cli/lib/promptModules/unit.js

@@ -2,7 +2,8 @@ module.exports = cli => {
   cli.injectFeature({
     name: 'Unit Testing',
     value: 'unit',
-    short: 'Unit'
+    short: 'Unit',
+    checked: true
   })
 
   cli.injectPrompt({