use yarn by default since ignite-cli expects an --npm flag

README.md

@@ -31,6 +31,7 @@ Check out the [Sample Application for Android](https://play.google.com/store/app
     - Install with `npm install -g ignite-cli`
     - Verify version with `ignite --version`
  - iOS apps require [Cocoapods](https://guides.cocoapods.org/using/getting-started.html) to be installed
+    - Verify `pod` installation with `pod install`
  - Not required but highly recommended, [Reactotron](https://github.com/infinitered/reactotron) makes debugging super simple and comes preconfigured
 
 To generate an app, run the following command:

docs/advanced-usage.md

@@ -12,7 +12,7 @@ You can pass flags for each of the options.
 | `--skip-git`             |                                | Skips git init                                 |
 | `--skip-commit-hook`     |                                | Skips `lint-staged` initialization             |
 | `--react-native-version` | 0.60.0                         | Install specific React Native version          |
-| `--yarn                ` |                                | Uses yarn in place of npm when generating      |
+| `--npm                 ` |                                | Uses npm in place of yarn when generating      |
 
 #### JDL App Generation
 

src/boilerplate/index.js

@@ -58,10 +58,6 @@ async function install (context) {
   let jhipsterConfig
   let jhipsterDirectory
 
-  // does the user want to use yarn?
-  const useNpm = !parameters.options.yarn
-  ignite.useYarn = !useNpm
-
   // if the user is passing in JDL
   if (parameters.options.jdl) {
     print.info('Importing JDL')
@@ -116,12 +112,18 @@ async function install (context) {
 
   props.skipGit = parameters.options['skip-git']
   props.skipCommitHook = parameters.options['skip-commit-hook']
+
+  // is the npm flag present, or is yarn not available?
+  const useNpm = JSON.parse(parameters.options.npm) || !Boolean(system.which('yarn'))
+  print.info(`Using ${useNpm ? 'npm' : 'yarn'} as the package manager`)
   props.useNpm = useNpm
 
   // very hacky but correctly handles both strings and booleans and converts to boolean
   props.detox = JSON.parse(props.detox)
   props.disableInsight = JSON.parse(props.disableInsight)
-
+  console.log(props)
+  console.log(JSON.stringify(props))
+  console.log(JSON.stringify(parameters.options))
   // attempt to install React Native or die trying
   const rnInstall = await reactNative.install({
     name,