trek

• I question whether I can use the core tests for the MVP interface.
• The self setup apply has fewer tests cases. I think it is a subset of the apply with setup.
• Every apply with setup can be used to instaniate a apply with auto-setup interface.
• I don’t like the CmdLine.hsig. For one thing it assumes it gets a list of command line arguments but no environment variables. It just seems unnecessary.
• I think apply :: IO () is probably the right interface. I can hopefully catch the ExitFailures.
• I will need to capture its standard handles when testing.
• apply :: IO () with be built with an autosetup db apply.
• So it apply :: IO ():
  • read the environment variables and make a data connection.
  • read the migration from a file. catch and error and exit.
  • parse the migration file name. catch and error and exit.
  • run the autosetup apply. catch and error and exit.
  • print result
• I should fix this interface and get things to compile.