CLI flag to disable all output formats in the config

[timofurrer]

Welcome

• Yes, I've searched similar issues on GitHub and didn't find any.
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How did you install golangci-lint?

go install

Your feature request related to a problem? Please describe

Users of golangci-lint sometimes have their preferred output formats configured in a golangci-lint configuration file (be it for personal preferences or required output for toolings, e.g. in CI). However, sometimes you just want to call golangci-lint without those preferred output formatters but just a single other formatted that satisfies the current needs.

Describe the solution you'd like

I think a command line flag to disable all configured formats in the config files in favor of the ones provided by the command line makes sense here.

Describe alternatives you've considered

Disabling all output formats manually, but that is not scalable and requires changes in scripts etc where that is used every time a new output format is added or removed.

Additional context

I've took a stab at this in #6273.

Supporter

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[boring-cyborg]

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[timofurrer]

cc @ldez

[ldez]

In a CI, the need will be more to add another output format, or overriding one, than ignoring existing configured output formats.
Adding another output format only locally seems to be a rare case.
Because a project will define its configuration mainly for local runs and add the formats related to CI with flags inside the CI configuration.

The need to use only one output format, and ignoring the file configuration out formats, seems very specific to the current way to use LSP server for golangci-lint.

I can see several ways to solve this problem:

1. Add a flag to force a "machine-readable" output (JSON output to stdout)
2. Add a flag to skip/ignore output configuration from the file.
3. Embed an LSP server in golangci-lint Implement LSP server #5004 (I'm working on it in all cases).

I think there are maybe other ways, but I need to think about it more.

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