Print informative errors when configuration YAML contains unused information

[keith]

Not sure this is worth fixing, but I wanted to bring it up.

If you make a config file like:

included: Classes

Instead of:

included:
  - Classes

SwiftLint will silently ignore the first one. Typically I think this performs the same way in yaml, but regardless it might be nice to add errors for cases where the configuration isn't what we'd expect. The only reason I noticed this is because of the large number of files being linted.

[jpsim]

I'd absolutely love to do more error handling wrt yaml files, but haven't yet found an elegant way to do that.

[sboc]

Where do I put .swiftlint.yml btw? I cannot get this to work at all. Where do I run swiftlint from?

[dpassage]

It looks like .swiftlint.yml doesn't work with the latest released version 0.1.2; I got it to work by checking out master and building it myself.

SwiftLint team, would love to get the config file support released! Great tool so far.

[jpsim]

SwiftLint team, would love to get the config file support released! Great tool so far.

Homebrew literally just yesterday started accepting formulas requiring Xcode 7, so we haven't been able to release until now. We'll be releasing shortly.

[dpassage]

Hooray! Thanks @jpsim !

[jpsim]

Many improvements to YAML error reporting were just merged in #498.