yarn compatible

Author: Nick Balestra

packages/create-cycle-app/index.js

@@ -9,7 +9,8 @@ const VERSION = require(path.resolve(__dirname, 'package.json')).version
 
 const validCommands = {
   'verbose': true,
-  'flavor': true
+  'flavor': true,
+  'noyarn': true
 }
 
 // Command line prelude (version and usage)
@@ -34,9 +35,10 @@ Object.keys(argv)
     return true
   })
 
-const flavor = argv.flavor || 'cycle-scripts@>=1.0.0 <2.0.0'
+const flavor = argv.flavor || 'core'
 const verbose = argv.verbose || false
+const noyarn = argv.noyarn || false
 const name = commands[0]
 
 // Parse the command line options and run the setup
-createApp(name, verbose, flavor)
+createApp(name, verbose, flavor, noyarn)

packages/create-cycle-app/src/createApp.js

@@ -2,19 +2,38 @@
 
 const path = require('path')
 
-const createProjectIn = require('./createProjectIn')
+const createAppDir = require('./createAppDir')
 const initQuestions = require('./initQuestions')
 const installScripts = require('./installScripts')
-const preparePackageJson = require('./preparePackageJson')
+const createPackageJson = require('./createPackageJson')
+const shouldUseYarn = require('./shouldUseYarn')
 
-module.exports = function createApp (name, verbose, flavor) {
-  const appFolder = path.resolve(name)
-  const appName = path.basename(appFolder)
-
-  initQuestions(flavor, options => {
-    createProjectIn(appFolder)
-    preparePackageJson(appFolder, appName, () => {
-      installScripts(appFolder, appName, flavor, verbose, options)
+module.exports = function createApp (name, verbose, flavor, noyarn) {
+  // The path where the cycle app will be created
+  const appPath = path.resolve(name)
+  // The name of the cycle app to create
+  const appName = path.basename(appPath)
+  // Which CLi to use (yarn or npm)
+  let cli = 'npm'
+  if (!noyarn && shouldUseYarn()) {
+    cli = 'yarn'
+  }
+  // console.log(cli)
+  // If no --flavor is passed (flavor === 'core')
+  // We prompt for language and stream library
+  // We set the flavor to be 'cycle-scripts'
+  if (flavor === 'core') {
+    const flavor = 'cycle-scripts'
+    initQuestions(answers => {
+      createAppDir(appPath)
+      createPackageJson(appPath, appName)
+      installScripts(appPath, appName, { flavor, verbose, answers, cli })
     })
-  })
+  // If a --flavor is passed we don't prompt the user
+  // We delegate every task to the flavor's init() method itself.
+  } else {
+    createAppDir(appPath)
+    createPackageJson(appPath, appName)
+    installScripts(appPath, appName, { flavor, verbose, answers: false, cli })
+  }
 }

packages/create-cycle-app/src/shouldUseYarn.js

@@ -0,0 +1,10 @@
+const execSync = require('child_process').execSync;
+
+module.exports = function shouldUseYarn() {
+  try {
+    execSync('yarnpkg --version', { stdio: 'ignore' });
+    return true;
+  } catch (e) {
+    return false;
+  }
+}