I have read through the complexity documentation via SonarQube Metrics Definition. I have also dug through the Rules we have defined, but those only determine bugs in the code & their respective severity. Unfortunately it does not outline how we could go about defining custom complexity rules (i.e. if you do x, the complexity will be increased by 1).
Could anyone shed some light on this?
Your question didn't originally specify language, so for
These are brief tutorials to bootstrap rule writing. In writing your own rules, you'll likely have questions of the "How do I get to X?" nature. With those, you should open a new thread on the SonarQube Google Group.