Add RobotFramework library arguments support

Problem description. For now, robocorp.robotframework-lsp-0.9.1 falls with error

Error creating libspec: SomeLibrary.
Return code: 252
Output:
Library 'SomeLibrary' expected 2 to 3 arguments, got 0.

if any count of args required for a user RobotFramework library.

Possible solution Probably robotframework-lsp could detect a types of arguments using typehints and use this info to generate lib specs with the correct libdoc call. If it’s not possible then some kind of configuration option could be provided in setting.json to match lib name and default arguments. Or it could be any other special description file in the workspace.

[mrdimfox]

Cool! Thank you. I’ll try it.

Update: It actually works! Awesome! I can just put <package>.<RobotLib>.libspec file into my python package which contains a RobotFramework library and LSP can find it without any problems! Here is an example of a libdoc call for a libspec generation for lib with two args:

python -m robot.libdoc --format XML my_package.robot.KeywordsLibrary::arg1::agr2 my_package.robot.KeywordsLibrary.libspec

[fabioz]

The usual command line would be:

python -m robot.libdoc --format XML:HTML <library_name> <library_name.libspec>

As you have custom usage for the parameters, you may want to take a look at: python -m robot.libdoc -h to see how to tackle that.

You can just place the .libspec under a file anywhere in the workspace or directly under some entry in the PYTHONPATH and the language server should find it.