ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc--which does by default use a C extension). It outputs s-expressions which can be manipulated and converted back to ruby via the ruby2ruby gem. As an example: def conditional1 arg1 return 1 if arg1 == 0 return 0 end becomes: s(:defn, :conditional1, s(:args, :arg1), s(:if, s(:call, s(:lvar, :arg1), :==, s(:lit, 0)), s(:return, s(:lit, 1)), nil), s(:return, s(:lit, 0))) Tested against 801,039 files from the latest of all rubygems (as of 2013-05): * 1.8 parser is at 99.9739% accuracy, 3.651 sigma * 1.9 parser is at 99.9940% accuracy, 4.013 sigma * 2.0 parser is at 99.9939% accuracy, 4.008 sigma * 2.6 parser is at 99.9972% accuracy, 4.191 sigma * 3.0 parser has a 100% parse rate. * Tested against 2,672,412 unique ruby files across 167k gems. * As do all the others now, basically.

Flay analyzes code for structural similarities. Differences in literal values, variable, class, method names, whitespace, programming style, braces vs do/end, etc are all ignored. Making this totally rad.

Simple FastGettext Rails integration.

Flog reports the most tortured code in an easy to read pain report. The higher the score, the more pain the code is in.

ruby2ruby provides a means of generating pure ruby code easily from RubyParser compatible Sexps. This makes making dynamic language processors in ruby easier than ever!

a code analyzer tool which extracted from rails_best_practices, it helps you easily build your own code analyzer tool.

Analyze code for potentially uncalled / dead methods, now with auto-removal.

High method and class churn has been shown to have increased bug and error rates. This gem helps you know what is changing a lot so you can do additional testing, code review, or refactoring to try to tame the volatile code.

Wrong provides a general assert method that takes a predicate block. Assertion failure messages are rich in detail. The Wrong idea is to replace all those countless assert_this, assert_that library methods which only exist to give a more useful failure message than "assertion failed". Wrong replaces all of them in one fell swoop, since if you can write it in Ruby, Wrong can make a sensible failure message out of it. Also provided are several helper methods, like rescuing, capturing, and d.

Workarounds before ruby-core officially supports Proc#to_source (& friends)

Excellent finds the nasty lines in your code. It implements a comprehensive set of checks for possibly buggy parts of your app that would otherwise make it into your repo and eventually to the production server.

A library for safe evaluation of Ruby code based on RubyParser and Ruby2Ruby. Provides Rails ActionView template handlers for ERB and Haml.

Source Code analysis gem for Ruby and Rails

No .yml files. Inline defaults. Optional keys. Inferred interpolation values. Wrappers and blocks, so your templates look template-y and your translations stay HTML-free.

ParseTree is a C extension (using RubyInline) that extracts the parse tree for an entire class or a specific method and returns it as a s-expression (aka sexp) using ruby's arrays, strings, symbols, and integers. As an example: def conditional1(arg1) if arg1 == 0 then return 1 end return 0 end becomes: [:defn, :conditional1, [:scope, [:block, [:args, :arg1], [:if, [:call, [:lvar, :arg1], :==, [:array, [:lit, 0]]], [:return, [:lit, 1]], nil], [:return, [:lit, 0]]]]]

Allows you to do example based pattern matching and queries against S Expressions (sexp).

ruby_to_c translates a static ruby subset to C. Hopefully it works. NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE THIS IS BETA SOFTWARE! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE ! NOTE RubyToC has the following modules: * Rewriter - massages the sexp into a more consistent form. * TypeChecker - type inferencer for the above sexps. * RubyToRubyC - converts a ruby (subset) sexp to ruby interals C. * RubyToAnsiC - converts a ruby (subset) sexp to ANSI C.

See https://microsoft.github.io/language-server-protocol/ "A Language Server is meant to provide the language-specific smarts and communicate with development tools over a protocol that enables inter-process communication."

Example based structural pattern matching for S-Expressions

Alternate eval which hook all methods executed in the evaluated code