redis-cmd.rb

#!/usr/bin/env ruby

def redis_host
  ENV['REDIS_HOST']
end

def rediscmd(cmd)
  escaped_cmd = cmd.gsub('*', '\*')
  `redis-cli -h #{redis_host} #{escaped_cmd}`.strip
end

def redisinspect(key, detail = false)
  type = rediscmd("type #{key}").strip
  return %Q(type: "#{type}", key: "#{key}", count_cmd: "", inspect: "") if type == "none"

  count_cmd =
    case type
    when 'set' then "scard #{key}"
    when 'zset' then "zcount #{key} -inf +inf"
    when 'string' then "get #{key}"
    when 'hash' then "hlen #{key}"
    when 'none' then "hlen #{key}"
    end
  result = rediscmd count_cmd

  output = %Q(type: "#{type}", key: "#{key}", count_cmd: "#{count_cmd}", inspect: "#{result}")

  if detail
    inspect_cmd =
      case type
      when 'set' then "smembers #{key}"
      when 'zset' then "zrange #{key} 1 10"
      when 'string' then "get #{key}"
      when 'hash' then "hvals #{key}"
      end
    inspect_result = rediscmd inspect_cmd
    output << "\n#{inspect_result}\n\n"
  end
  output
end

sub_command = ARGV[0]

case sub_command
when 'inspect', 'i'
  puts redisinspect(ARGV[1])
when 'inspect-detail', 'id'
  puts redisinspect(ARGV[1], true)
when 'cmd', 'c'
  args = ARGV[1..-1].join(' ')
  puts args
  puts rediscmd(args)
else
  puts <<-TXT
  sub command of #{sub_command} is not found.

  Usage:
    #{__FILE__} cmd get key
    #{__FILE__} inspect key
    #{__FILE__} inspect-detail key
  TXT
end