Support dynamic default values #114
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Typer allows passing a `default_factory` to options and arguments, which is a callable that will be used at runtime to determine the default value. The Textual application created by Trogon crashes when this is used, because it tries to convert the str representation of the callable function for display when it should be converting the result of calling that function instead. This change ensures dynamic default values do not crash the application, and has the effect of setting the default value appropriately in the TUI.
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Typer allows passing a
default_factoryto options and arguments, which is a callable that will be used at runtime to determine the default value. Typer sets the option'sdefaulton the Click command object to the supplied factory value.The Textual application created by Trogon crashes when this is used, because it tries to convert the str representation of the callable function for display when it should be converting the result of calling that function instead.
I don't think I fully understand why this crash occurs, since it appears that Trogon properly handles a default Click application when an option's default is e.g. a
lambda. Perhaps Typer is missing something in its translation ofdefault_factoryto Click'sdefault, and I'm open to filing an issue/opening a PR on their end if it appears that's the case, but I'd need help in better understanding it!