Class: EyInfo::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/ey_info.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/ey_info.rb', line 24

def initialize(args)
  @args = args.dup
end

Instance Attribute Details

#args ⇒ Object (readonly)

The array of (unparsed) command-line options



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# File 'lib/ey_info.rb', line 20

def args
  @args
end

#options ⇒ Object (readonly)

The hash of (parsed) command-line options



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# File 'lib/ey_info.rb', line 22

def options
  @options
end

Class Method Details

.run(args) ⇒ Object 



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# File 'lib/ey_info.rb', line 13

def self.run(args)
  cli = new(args)
  cli.parse_options!
  cli.run
end

Instance Method Details

#extract_environment_variables! ⇒ Object

Extracts name=value pairs from the remaining command-line arguments and assigns them as environment variables.



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# File 'lib/ey_info.rb', line 78

def extract_environment_variables! #:nodoc:
  args.delete_if do |arg|
    next unless arg.match(/^(\w+)=(.*)$/)
    ENV[$1] = $2
  end
end

#option_parser ⇒ Object 



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# File 'lib/ey_info.rb', line 28

def option_parser
  # @logger = Logger.new
  @option_parser ||= OptionParser.new do |opts|
    opts.banner = "Usage: #{File.basename($0)} ssh_config"

    opts.on("-i", "--identity-file [IDENTITY_FILE]", "ssh key default id_rsa.") do |value|
      options[:ssh_key] = value
    end

    opts.on("-u", "--user [USER]", "ssh key default root.") do |value|
      options[:user] = value
    end

    opts.on("-t", "--template [TEMPLATE]", "path to template.") do |value|
      options[:template] = value
    end

    opts.on("-h", "--help", "Display this help message.") do
      puts opts
      exit
    end

    opts.on("-V", "--version",
      "Display the ey_info version, and exit."
    ) do
      puts "EyInfo Version #{EyInfo::Version}"
      exit
    end

  end
end

#parse_options! ⇒ Object 



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# File 'lib/ey_info.rb', line 60

def parse_options!
  # defaults
  @options = {:actions => [], :user => 'root', :ssh_key => 'id_rsa'}

  if args.empty?
    warn "Please specifiy an action to execute."
    warn option_parser
    exit 1
  end

  option_parser.parse!(args)
  extract_environment_variables!

  options[:actions].concat(args)
end

#run ⇒ Object 



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# File 'lib/ey_info.rb', line 85

def run
  write_ssh_config
  puts "Your #{ENV['HOME']}/.ssh/config now has shortcuts your ey cloud servers."
end

#ssh_servers ⇒ Object 



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# File 'lib/ey_info.rb', line 118

def ssh_servers
  @hosts = {}
  @info = EyInfo::Hosts.new
  all_hosts = @info.all_hosts
  all_hosts.keys.each do |env_name|
    all_hosts[env_name].each do |server|
      @hosts["#{server[:ssh_key]}"] = server[:hostname]
    end
  end
  path = options[:template] || File.expand_path("../templates/default_ssh_config.erb", __FILE__)
  content = IO.readlines(path).join("")
  template = ERB.new(content)
  template.result(binding)
end

#write_ssh_config ⇒ Object 



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# File 'lib/ey_info.rb', line 90

def write_ssh_config
  @ssh_config = "#{ENV['HOME']}/.ssh/config"
  @info = EyInfo::Hosts.new
  
  # clear out old known_hosts
  `grep -v 'compute-1.amazonaws.com' ~/.ssh/known_hosts > ~/.ssh/known_hosts.tmp`
  `mv ~/.ssh/known_hosts.tmp ~/.ssh/known_hosts`
  
  # for erb template
  @identify_file = "~/.ssh/#{options[:ssh_key]}"
  @user = options[:user]
  
  if File.exist?(@ssh_config)
    injector = TextInjector.new(
      :file => @ssh_config,
      :update => true,
      :content => ssh_servers
    )
  else
    injector = TextInjector.new(
      :file => @ssh_config,
      :write => true,
      :content => ssh_servers
    )
  end
  injector.run
end