Commits on Dec 10, 2020

1. Configure Google Error Prone static code analysis tool …

   - for more info see https://errorprone.info/
   
   - add a separate maven profile for running errorprone analysis
     it is not active by default
   
   - Add top-level lombok.config file for configuring Lombok.
     This file doesn't contain any other settings that
     marks it as the top most config file with "config.stopBubbling = true"
     (see https://projectlombok.org/features/configuration for reference)
   
     - Before running the Error Prone analysis, it's necessary to
       manually configure Lombok to add @javax.annotation.Generated("lombok")
       annotation on all fields, methods, and types that are generated.
       This makes Error Prone skip the analysis for Lombok generated code.
       - this setting cannot be enabled by default since JDK9+ doesn't include
         the javax.annotation.Generated annotation by default and adding the
         required dependency will change the classpath dependency resolution results.
       - There is an open issue to support lombok.Generated annotion in
         ErrorProne, google/error-prone#1863
   
   - example usage:
     Configure Lombok to add Generated annotations
     echo "lombok.addJavaxGeneratedAnnotation = true" >> lombok.config
     then,
     on JDK8
     "mvn -Perrorprone,errorprone-jdk8,core-modules compile"
     on JDK11+
     "mvn -Perrorprone,errorprone-jdk11,core-modules compile"
   
     - usability is better when used together with IntelliJ
       since one can click on the error message to navigate
       to the code location
   
   - also add configuration for Error Prone SLF4J plugin
     https://github.com/KengoTODA/errorprone-slf4j
     which helps detect misusage of SLF4J API

   

   lhotari committed Dec 10, 2020
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