git-coverage

#!/usr/bin/ruby
# coverage for modified, added or untracked files in git for a rails application
require 'fileutils'
require 'rubygems'
require 'term/ansicolor'

RCOV_OPTS = File.read(File.join(Dir.pwd, 'spec/rcov.opts')).split(/\r?\n/)
SPEC_OPTS = File.read(File.join(Dir.pwd, 'spec/spec.opts')).split(/\r?\n/)
GIT_STATUS = `git status`

SPECS_TO_RCOV = GIT_STATUS.split("\n").collect do |line|
  next unless line =~ /modified|added|untracked/
  file = line.split(' ').last
  next unless file =~ /^(?:app|lib)/

  spec = "spec/#{file.sub(/^app\//, '').sub(/\.rb$/, '_spec.rb')}"
  unless File.exists?(File.join(Dir.pwd, spec))
    STDERR.puts Term::ANSIColor.red { "Missing spec: #{File.join(Dir.pwd, spec)}" }
    next
  end

  spec
end.compact

FILES_TO_RCOV = GIT_STATUS.split("\n").collect do |line|
  next unless line =~ /modified|added|untracked/
  file = line.split(' ').last
  next unless file =~ /^(?:app|lib)/

  file
end.compact

puts
FileUtils.rm_r(File.join(Dir.pwd, 'coverage')) if File.exists?(File.join(Dir.pwd, 'coverage'))
puts("ruby -S rcov #{RCOV_OPTS.join(' ')} --exclude 'app/*,db/*,lib/*,spec/*,config/*,vendor/*,script/*' -i '#{FILES_TO_RCOV.join(',')}' #{`which spec`.chomp} -- #{SPEC_OPTS.join(' ')} #{SPECS_TO_RCOV.join(' ')}")
system("rcov #{RCOV_OPTS.join(' ')} --exclude 'app/*,db/*,lib/*,spec/*,config/*,vendor/*,script/*' -i '#{FILES_TO_RCOV.join(',')}' `which spec` -- #{SPEC_OPTS.join(' ')} #{SPECS_TO_RCOV.join(' ')}")