assert_scanner.rb

#!/usr/bin/ruby -w
require "sexp_processor"
require "ruby_parser"

class AssertScanner < MethodBasedSexpProcessor
  def self.run paths
    paths = expand_dirs_to_files(*paths)

    paths.each do |path|
      # warn path
      begin
        rp = RubyParser.new
        self.new.process rp.process(File.read(path), path)
      rescue RuntimeError, Racc::ParseError => e
        warn "Skipping: parse error on #{path}: #{e.message}"
      end
    end
    nil
  end

  ALLOWED_MSG_TYPES = [:hash]

  def process_call sexp
    _, recv, msg, *args = sexp
    if recv == nil && msg == :assert && args.size == 2
      if args.first.sexp_type == :str || ! ALLOWED_MSG_TYPES.include?(args.last.sexp_type)
        puts "  - %s:%s" % [sexp.file, sexp.line]
        `emacsclient +#{sexp.line} #{sexp.file}`
      end
    end
    sexp
  end
end

AssertScanner.run ARGV if $0 == __FILE__

# Regex used to do the first pass
# find . "(" -name "*.rb" ")" -print0 | xargs -0 ruby -ne 'puts $_.gsub(/assert ([^,(]*(?:\(.*?\))*), (.+)/, "assert \\1, message: \\2")' -i