Introduce BaselineOutputFormatter

[marcelthole]

Hello,

here is a possible solution to create a baseline for Deptrac.
With this simple formatter it's possible to use deptrac in a CI/CD environment without fixing all existing violations

[smoench]

Hi @marcelthole,

thank you for your contribution!

What do you think about implementing this as a feature like phpstan and/or psalm does? Having two options --update-baseline=deptrac.baseline.yaml and --set-baseline=deptrac.baseline.yaml or a similar approach.

[marcelthole]

My first idea was a baseline.yml file. But is there a solution for including yml files in yml files?
I dind't find anything in the symfony documentation about it.

Without an include option, a manually copy into the configuration is required?

[smoench]

There is no such feature in the YAML-Component but of the DependencyInjection-Component. They read values of a key an import the files and use an array_merge for imported values.

[marcelthole]

Thanks for the input. I looked at the DependencyInjection Component but didn't find a way to solve the current situation because it's not a configuration. I implemented a YmlFileLoader with the function of including one basefile.

I will check the Build and conflicts and update this pr soon.
(Btw. its hard to run the build tools locally because they are not defined in the require dev section 🙈 )

[smoench]

I'm using phive for tools installation. There is a Makefile which includes all necessary commands.

[smoench]

Thank you, @marcelthole !