Add a way to ignore modules from haddock documentation generation

[webdevred]

Problem

When generating Haddock documentation, autogenerated Paths_* modules trigger warnings about missing documentation for functions like:

• version
• getBinDir
• getLibDir
• getDynLibDir
• getDataDir
• getLibexecDir
• getDataFileName
• getSysconfDir

These modules are fully autogenerated by Cabal, and users typically do not need to document them manually. I think a way to ignore modules while still generating Haddock for the said component woul be very nice.

Proposal

Cabal/Haddock should automatically ignore missing documentation warnings for Paths_* modules, reducing noise in build logs. Or new a setting that could ignore modules.

Benefits

• Cleaner Haddock documentation output.
• Users won’t be bothered by warnings for modules they cannot or do not need to document.

Example

When building documentation for jbeam-edit, Haddock reports missing documentation for all functions in Paths_jbeam_edit. Automatically ignoring this module would remove unnecessary warnings.