spec_age.rb

require "date"

specs = []

def get_indentation(line)
  line.match(/^(\s*)/)[1].length
end

File.open(ENV["FILE"]) do |file|
  spec = nil
  line_num = 0

  while line = file.gets
    line_num += 1

    if line =~ /\s*it\s["']/
      spec = {
        name: line.strip,
        indentation: get_indentation(line),
        start_ln: line_num
      }
    elsif line =~ /\s*end/ && spec && get_indentation(line) == spec[:indentation]
      spec[:end_ln] = line_num
      specs << spec
      spec = nil
    end
  end
end

specs.each do |spec|
  blame = `git blame #{ENV["FILE"]} -L #{spec[:start_ln]},#{spec[:end_ln]}`
  dates = blame.scan(/(\d{4}-\d{2}-\d{2})/).flatten.map { |s| Date.strptime(s, "%Y-%m-%d") }
  spec[:last_modified] = dates.max
end

specs.each do |spec|
  puts "#{spec[:last_modified].strftime("%Y-%m-%d")}: #{spec[:name]}"
end