get_days.rb

#!/usr/bin/ruby
# coding: utf-8

require 'date'

begin
  raise unless ARGV.size == 3
  date_range = ARGV.shift.match(/(\d{1,2}\/\d{1,2})-(\d{1,2}\/\d{1,2})/) { Date.parse($1)..Date.parse($2) }
  start_time, end_time = ARGV.shift.match(/(\d{1,2}\:\d{1,2})-(\d{1,2}\:\d{1,2})/) { [DateTime.parse($1), DateTime.parse($2)] }
  step = ARGV.shift.to_f
  raise unless date_range && start_time && end_time && step > 0
rescue
  puts 'mm/dd-mm/dd hh:mm-hh:mm h 形式で日時を入力'
  exit 1
end

WDAYS = '日月火水木金土'

times = start_time.step(end_time, step/24.0).each_cons(2).with_object([]) do |(stime, etime), arr|
  arr << "#{stime.strftime('%H:%M')}-#{etime.strftime('%H:%M')}"
end

date_range.to_a.product(times).each do |date, time|
  puts "#{date.strftime('%m/%d')}(#{WDAYS[date.wday]}) #{time}"
end