Add before_prepare hook to fetch dependencies

config.xml

@@ -43,6 +43,7 @@
         <splash src="res/android/drawable-port-xxhdpi/screen.png" density="port-xxhdpi"/>
         <splash src="res/android/drawable-port-xxxhdpi/screen.png" density="port-xxxhdpi"/>
 
+        <hook type="before_prepare" src="scripts/get_dependencies.sh" />
         <hook type="after_prepare" src="scripts/clean_node_modules.sh" />
 
     </platform>

scripts/clean_node_modules.sh

@@ -4,7 +4,7 @@
 
 cd platforms/android/app/src/main/assets/www/node_modules
 
-echo "Cleaning up node_modules from www..."
+echo "Cleaning up unneeded files in node_modules..."
 
 echo "Size before: $(du -sh | cut -d '	' -f 1)"
 

scripts/get_dependencies.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+echo "Installing node modules into www..."
+
+cd www
+
+if type "yarn" > /dev/null; then
+    yarn install
+    exit 0
+fi
+
+# If Yarn isn't installed, use npm
+echo "Warning: using npm install instead of the preferred yarn install"
+echo "Consider installing Yarn"
+npm install