Where can I find an actively developed lint tool for Ruby?
code-analysis, lint, ruby, static-analysis
Solution
You could give Diamondback Ruby a try. It does a static typecheck of Ruby code, and will thus blame you for using an undefined variable.
While DRuby is an ongoing research project, it already works quite well for small, self-contained Ruby scripts. Currently, it is unable to analyze much of the Ruby standard library “out-of-the-box”. Currently they are working toward typing Ruby on Rails (see their most recent papers).
Problem
Most of the code I write is in Ruby, and every once in a while, I make some typo which only gets caught after a while. This is irritating when I have my scripts running long tasks, and return to find I had a typo. Is there an actively developed lint tool for Ruby that could help me overcome this? Would it be possible to use it across a system that works with a lot of source files, some of them loaded dynamically? Take this snippet as an example: ``` a = 20 b = 30 puts c ``` To win bounty, show me a tool that will detect the `c` variable as not created/undefined.