gistfile1.rb

#!/usr/bin/env ruby
# Written by Coda Hale <coda.hale@gmail.com>. MIT License. Go for it.

def include_pattern(filename)
  core = filename.gsub(/_spec/, "").gsub(/\Aspec\//, "")
  return Regexp.quote(core)
end

if ARGV.empty? || ARGV == ["--help"] || ARGV == ["-h"]
  STDERR.puts("Usage:")
  STDERR.puts("  spec-and-coverage spec/models/example_spec.rb --color --other-rspec-option")
  exit(-1)
else
  exec(
    "rcov",
    "-T",                               # generate a text summary
    "--no-html",                        # don't generate HTML
    "-o", "/dev/null",                  # don't generate anything
    "-x", ".*",                         # exclude everything
    "-i", include_pattern(ARGV.first),  # but include the file under test
    ARGV.first,                         # run the spec
    "--", *ARGV[1..-1])                 # and pass on any options to the spec
end