Debugging

Via the VS Code UI

Despite hours of trying, I have never, ever managed to get this working through any means. So sadly, it's CLI all the way, in my eyes.

Via the CLI

Add gem 'debug' to your Gemfile and run bundle install.

Now, you can run Ruby scripts through the Ruby Debugger (rdbg) as follows:

# To debug `FOO=BAR bundle exec fastlane release`:
FOO=BAR bundle exec rdbg -c -- bundle exec fastlane release

Useful commands:

• n / next: Next line.
• c / continue: Continue.
• bt: Backtrace.
• i / info: Info.
• h / help: Help.
• p my_variable: Evaluate the expression my_variable.

The Ruby Debugger will automatically stop at debugger / binding.break / binding.b statements. In practice, I find it easiest to navigate just by inserting those into the code and playing through with continue.