Is it possible to use a rule set defined in .Xml (based on SonarQube- und FindBugs rules) and run it without setting up a SonarQube server. I want to use SonarLint in Eclipse for some Java projects with only the input of the rule set i get forwarded from other projects of the company.
You can use SonarLint standalone - in which case you will get the default, non-editable rule set - or connected to your SonarQube server - in which case you will get the rules in the profile that's applied to your project.
There is no middle ground where you could feed a list of rules in standalone mode.