what quarter now

w9n.rb

#!/usr/bin/env ruby

def what_quarter_now
  month = Time.now.strftime("%-m")
  
  if    month == 6  || 7  || 8
    puts "1Q"
  elsif month == 9  || 10 || 11
    puts "2Q"
  elsif month == 12 || 1  || 2
    puts "3Q"
  elsif month == 3  || 4  || 5
    puts "4Q"
  else
    puts "invalid month"
  end
end

def options
  if ARGV[0] == '--list' || ARGV[0] == '-l'
    puts <<-'EOS'
6月, 7月, 8月 1Q
9月,10月,11月 2Q
12月,1月, 2月 3Q
3月, 4月, 5月 4Q
    EOS
  elsif ARGV[0] == '--help' || ARGV[0] == '-h'
    puts <<-'EOS'
-h, --help : Show help
-l, --list : List all months of quarter
    EOS
  else
    puts <<-'EOS'
invalid option

-h, --help : Show help
-l, --list : List all months of quarter
    EOS
  end
end

ARGV[0].nil? ? what_quarter_now : options

Usage

$ ./w9n.rb