Support Palantir Java Format

[ihostage]

Details about Palantir Java Format in the README -> https://github.com/palantir/palantir-java-format

[ihostage]

The main question is: What should we do? 😄
Yes, Palantir is fork of Google, but for latest verion of these formatters the result is different for GOOGLE and AOSP styles.

So, I see a two options:

1. Migrate to Palantir (disadvantages: backward incompatible with previous our plugin options and the results)
2. Add Palantir as independent formatter with another settings (disadvantages: a few new plugin options that very simillar to current and one switch option to choose a formatter)

[ihostage]

@mkurz WDYT?

[ihostage]

First option in the first commit of this PR, second in second 😄

[eed3si9n]

I'm -1 on this. To each their own, but I don't want to voluntarily install software developed by Palantir.

[ihostage]

I'm -1 on this. To each their own, but I don't want to voluntarily install software developed by Palantir.

But formatter is just OSS project that is developed by community and published under APL 2.0 like Sbt itself or Play 🤔

[eed3si9n]

Since I can't check every commits, I can only use heuristics like "can I trust this company to not hack into my stuff", and this company literally makes software for military and spy agencies like CIA.

[ihostage]

I think I can extract the core part and split formatters on the plugin side not in settings. I mean

addSbtPlugin("com.github.sbt" % "sbt-java-formatter" % --latest version---) // Depends on Google Formatter

or

addSbtPlugin("com.github.sbt" % "sbt-java-palantir-formatter" % --latest version---) //  Depends on Palantir formatter

@eed3si9n is it ok? WDYT?

[eed3si9n]

It's marginally better, but if you keep their code in the repo anyone maintaining this plugin would have to run it on their laptop to run tests?

[ihostage]

It's marginally better, but if you keep their code in the repo anyone maintaining this plugin would have to run it on their laptop to run tests?

Yes, it's true. The users of sbt-java-formatter won't run a Palantir formatter in their machines, but users of sbt-java-palantir-formatter and maintainers this repo will. 🤷‍♂️