DetermineTemplateConfig decides what should be passed to TemplateUrl and TemplateFolder.

Convert the given string to a MissingConfigAction enum, or return an error if this is not a valid value for the MissingConfigAction enum.

Convert the given string to a MissingKeyAction enum, or return an error if this is not a valid value for the MissingKeyAction enum.

Parse the command line options provided by the user.

exit with an error when there is a missing key.

print <no value> for any missing key.

print the zero value of the missing key.

The command-line options for the boilerplate app.

This type is an enum that represents what to do when the template folder passed to boilerplate does not contain a boilerplate.yml file.

This type is an enum that represents what we can do when a template looks up a missing key.