Currently updating to a new ghc version and adding the now-outdated version requires changes to every iridium.yaml. This should be simplified:
- The user should be able to globally define a list of ghc executables (paths)
- iridium should query their versions
- There should be a global default version (not a path)
- Per-project, you should be able to either define a list of versions to be tested, one of which marked as default and used for commands that are run on only one compiler, or (if not defined) the default global default compiler will be used.
Currently updating to a new ghc version and adding the now-outdated version requires changes to every
iridium.yaml. This should be simplified: