TS normalize

normalize.rb

def normalize(import_statement, file_path)
  import_from = import_statement.scan(/(?<=from ').*(?=')/)[0]
  from_path = file_path.split('/').reverse
  to_path = import_from.split('/')
  new_path = []
  while !to_path.empty?
    case to_path.last
    when '.'
      new_path << to_path.pop
    when '..'
      if new_path.last == from_path.last
        new_path.pop
        to_path.pop
        from_path.pop
        new_path << '.' if from_path.length == 1
      else
        new_path << to_path.pop
      end
    else
      new_path << to_path.pop.gsub(".ts", "")
    end
  end
  import_statement.gsub(import_from, new_path.reverse.join('/'))
end

Dir["spec/**/*.ts"].each do |path|
  replace = File.readlines(path).reduce([]) do |lines, line|
    if line =~ /import.*from/
      lines << normalize(line, path)
    else
      lines << line
    end
  end
  File.open(path, 'w') { |f| f.puts(replace.join) }
end