Detecting Oxbow Code in Erlang Codebases with the Highest Degree of Certainty
summary
A rebar3 plugin called hank statically scans Erlang ASTs to detect specific unused macros, unused record fields and unused header files, plus unused config keys (heuristic: atom occurrence), function arguments, callbacks and NIFs. Each rule is configurable and designed to avoid false positives — if hank flags something it is safe to remove. Running it on OTP (~2M LOC), Kazoo and a carefully maintained project surfaces many surprising removals and validates the approach.
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chapters (5)
- 0:00Start
- 0:53A Simple Ticket...
- 3:43A seemingly simple change...
- 8:47Why don't we delete everything?
- 12:15Hank Rules
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