Boolean Flags for TOPP tools are not working

[t0mdavid-m]

If boolean parameters are adjusted within the TOPP tool framework, the framework attempts to set the flags explicitly, which is not expected by TOPP tools and leads to errors:

true values:
Current Output: -myflag true
Expected by TOPP: -myflag

false values:
Current Output: myflag false
Expected by TOPP: (omission)

It seems like we cannot distinguish boolean values from string values from the respective ini files (#59). Thus, for FLASHViewer we went with rules for the parameters values "true" and "false" (see d1a85b9). However, this solution could cause issues in scenarios where the values "true" or "false" should be actual strings.

I would assume that this a rare case but also wanted to see if anyone else has another opinion?

[cbielow]

Ideas:

1. create an INI file (which uses true/false internally) with your parameters and pass that on the commandline
2. inspect the INI file, to determine the value type (a flag will have <ITEM name="..." type="bool" ....>
3. just annotate params in streamlit 'manually' as what they are and use that annotation when invoking the TOPP tool (least stable nor fun solution).