Add environment variables permanently on MAC OS

I have recently decided to externalize some configuration settings of a side project I'm working on. This is a pretty straightforward task on Linux, but it was quite different on Mac as defining this environment variables in .bash_profile won't make them available to all applications. To achieve that, I had to do the following:

1. I added my environment variables to .bash_profile as usual
• export OPENSHIFT_MYSQL_DB_HOST=localhost
• export OPENSHIFT_MYSQL_DB_PORT=3306
• export OPENSHIFT_APP_NAME=dev
• export OPENSHIFT_MYSQL_DB_USERNAME=appuser
• export OPENSHIFT_MYSQL_DB_PASSWORD=apppwd
2. Create a file openshift-env.plist in ~/Library/LaunchAgents that contains: 

•  <?xml version="1.0" encoding="UTF-8"?>
  <plist version="1.0">
  <dict>
   <key>Label</key>
   <string>openshift-env</string>
   <key>ProgramArguments</key>
   <array>
   <string>bash</string>
   <string>-l</string>
   <string>-c</string>
   <string>
   $HOME/.openshift-env.sh
   </string>
   </array>
   <key>RunAtLoad</key>
   <true/>
  </dict>
  </plist>
  

3. Create a shell script openshift-env.sh using this command: nano ~/.openshift-env.sh and paste this: