Attempt to cache the downloads

.travis.yml

@@ -10,20 +10,22 @@ cache:
     - $HOME/.gradle/wrapper/
     - $HOME/.android/build-cache
     - $HOME/Library/Caches/Homebrew
+    - $DOWNLOADS_DIR
 env:
   global:
     - TERM=dumb
     - ANDROID_HOME=/usr/local/share/android-sdk
     - MONO_URL="https://download.mono-project.com/archive/5.12.0/macos-10-universal/MonoFramework-MDK-5.12.0.226.macos10.xamarin.universal.pkg"
     - UNITY_URL="https://download.unity3d.com/download_unity/21ae32b5a9cb/MacEditorInstaller/Unity-2017.4.3f1.pkg"
+    - DOWNLOADS_DIR=$HOME/downloads
 install:
   - brew tap caskroom/cask
   - brew cask install android-sdk
   - yes | sdkmanager "platforms;android-27"
   - yes | sdkmanager --licenses
-  - curl -o Mono.pkg $MONO_URL & curl -o Unity.pkg $UNITY_URL & wait
-  - sudo installer -dumplog -package Mono.pkg -target /
+  - curl -o $DOWNLOADS_DIR/Mono.pkg $MONO_URL & curl -o $DOWNLOADS_DIR/Unity.pkg $UNITY_URL & wait
+  - sudo installer -dumplog -package $DOWNLOADS_DIR/Mono.pkg -target /
   - export PATH="$PATH:/Library/Frameworks/Mono.framework/Versions/Current/Commands"
-  - sudo installer -dumplog -package Unity.pkg -target /
+  - sudo installer -dumplog -package $DOWNLOADS_DIR/Unity.pkg -target /
   - bundle install
 script: bundle exec rake