[Feature request] Less verbose output

[ly29]

I propose we that allow a less verbose mode.

The existing way of Fantomas deals with this problem is being very verbose doing dotnet fantomas --recurse . where is each file processed is being list.. It would be helpful to being less verbose not print any info about unchanged files.

Pros and Cons

The advantages of making this adjustment to Fantomas are less nosiy output allows user to focus on important things.

The disadvantages of making this adjustment to Fantomas are it is a change and someone might be dependent on current behavior of the cli tool.
It might also might make ignored files harder to debug.

Extra information

Estimated cost (XS, S, M, L, XL, XXL): S

Related suggestions: (put links to related suggestions here)

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Please tick this by placing a cross in the box:

• I have read the Contribution Guidelines.
• I have searched both open and closed suggestions on this site and believe this is not a duplicate

Please tick all that apply:

• This is not a breaking change to Fantomas
• I or my company would be willing to help implement and/or test this
• This suggestion is part of the Microsoft style guide (please add a link to section if so)
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[nojaf]

Hello, thank you for this suggestion.

This sounds reasonable to me. We could introduce a --verbosity setting to the CLI tool.
I think introducing a logger library for the CLI tool would also make a lot of sense.
Serilog comes to mind, but I'm open to suggestions.

I think it is ok to change the current behaviour with something less verbose and add the option to re-enable that behaviour if someone really needs it.

Are you interested in submitting a PR for this? (If so please target the v5.2 branch)

//cc @dawedawe

[ly29]

I will take look this weekend.

Serilog is nice and I use it at work but have no strong opinion.

[dawedawe]

Thanks @ly29
I'd also be okay with a less verbose output by default and the old level of verbosity hidden behind a setting.

[safesparrow]

FWIW I think there is an easy way to halve the number of lines Fantomas produces:
Replace

Processing .\src\fsc\fscmain.fs
'.\src\fsc\fscmain.fs' was unchanged
Processing .\src\FSharp.Build\CreateFSharpManifestResourceName.fs
'.\src\FSharp.Build\CreateFSharpManifestResourceName.fs' was unchanged
Processing .\src\FSharp.Build\Fsc.fs
'.\src\FSharp.Build\Fsc.fs' was unchanged
Processing .\src\FSharp.Build\FSharpCommandLineBuilder.fs
'.\src\FSharp.Build\FSharpCommandLineBuilder.fs' was unchanged

with

Processing files:
.\src\fsc\fscmain.fs - unchanged
.\src\FSharp.Build\CreateFSharpManifestResourceName.fs - unchanged
.\src\FSharp.Build\Fsc.fs - unchanged
.\src\FSharp.Build\FSharpCommandLineBuilder.fs - unchanged

Also, for me ignored files do not get listed in the output.

EDIT: However I note that this is likely going to change as per #2717 (comment) and that get rid of verbose output, perhaps.

[nojaf]

Available in v6.