checkstyle / chksutil

checkstyle is a library for working with checkstyle files.

The included chksutil is a utility for inspecting and diffing checkstyle files.

$ chksutil diff old.chk new.chk
Fixed info on GoalSetting.php:44 - DocblockTypeContradiction: Cannot resolve types for $value - docblock-defined type int does not contain null
Fixed info on GoalSetting.php:44 - RedundantConditionGivenDocblockType: Found a redundant condition when evaluating docblock-defined type $value and trying to reconcile type 'int' to !null
Created info on GoalSetting.php:72 - MissingParamType: Parameter $value has no provided 

Install chksutil

binaries are attached to the releases

https://github.com/methodci/checkstyle/releases

otherwise you can install from source via

$ go install github.com/methodci/checkstyle/cmd/chksutil@latest