~/.csshclustersを読んでtmuxのwindowを開く。

csshtmux.rb

#!/usr/bin/env ruby
require 'json'

def expand_clusters clusters
  expanded = false
  clusters.each do |label, hosts|
    tmp_hosts = []
    hosts.each do |host|
      if clusters.key?(host)
        tmp_hosts.concat(clusters[host])
        expanded = true
      else
        tmp_hosts << host
      end
    end
    clusters[label] = tmp_hosts
  end

  if expanded
    expand_clusters clusters
  else
    return clusters
  end
end

def parse_config
  labels, hosts = [], []
  clusters = Hash.new
  open("#{ENV['HOME']}/.csshclusters", 'r') do |f|
    f.each do |line|
      next if line.start_with?("\n", '#')
      line_ary = line.split(/\s/)
      label = line_ary.shift
      labels << label
      hosts.concat line_ary
      clusters[label] = line_ary
    end
  end
  expand_clusters clusters
end

def open_ssh hosts
  `tmux new-window`
  hosts.each_with_index do |hostname, index|
      `tmux split-window -d "ssh #{hostname}"`
      `tmux select-layout tiled`
  end
  `tmux set-window-option synchronize-panes on`
end

def main
  clusters = parse_config
  targets  = []
  ARGV.each do |label|
    targets.concat(clusters[label])
  end
  open_ssh(targets) if targets.size > 0
end

main()