Class: VBOX::CLI

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

Instance Method Summary collapse

Constructor Details

#initialize(argv = ARGV) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/vbox/cli.rb', line 10

def initialize argv = ARGV
  @argv = argv
end

Instance Method Details

#_expand_glob(glob) ⇒ Object

expand globs like “d1-30” to d1,d2,d3,d4,…,d29,d30



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# File 'lib/vbox/cli.rb', line 123

def _expand_glob glob
  if glob[/\{(\d+)-(\d+)\}/]
    r = []
    $1.to_i.upto($2.to_i) do |i|
      r << _expand_glob(glob.sub($&,i.to_s))
    end
    r
  else
    [glob]
  end
end

#_fnmatch(fname) ⇒ Object 



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# File 'lib/vbox/cli.rb', line 135

def _fnmatch fname
  @globs.each do |glob|
    return true if File.fnmatch(glob, fname)
  end
  false
end

#_run_cmd(cmd, name) ⇒ Object 



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# File 'lib/vbox/cli.rb', line 152

def _run_cmd cmd, name
  if COMMANDS.include?(cmd)
    @vbox.send cmd, name
  elsif cmd['=']
    # set some variable, f.ex. "macaddress1=BADC0FFEE000"
    @vbox.modify name, *cmd.split('=',2)
  elsif cmd == 'snapshots'
    @vbox.get_snapshots(name).each do |x|
      printf "%s  %s\n", x.uuid, x.name
    end
  else
    STDERR.puts "[!] unknown command #{cmd.inspect}".red
    puts @help
    exit 1
  end
end

#_run_multiple_cmd(cmd, name) ⇒ Object 



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# File 'lib/vbox/cli.rb', line 142

def _run_multiple_cmd cmd, name
  vms = @vbox.list_vms
  @globs = _expand_glob(name).flatten
  vms.each do |vm|
    if _fnmatch(vm.name)
      _run_cmd cmd, vm.name
    end
  end
end
 


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# File 'lib/vbox/cli.rb', line 14

def banner
  bname = File.basename(__FILE__)
  r = []
  r <<  "USAGE:"
  r <<  "\t#{bname} [options]                           - list VMs"
  r <<  "\t#{bname} [options] <vm_name>                 - show VM params"
  r <<  "\t#{bname} [options] <vm_name> <param>=<value> - change VM params (name, cpus, usb, etc)"
  r <<  "\t#{bname} [options] <vm_name> <command>       - make some action (start, reset, etc) on VM"

  r <<  ""
  r <<  "COMMANDS:"
  (COMMANDS+['snapshots']).sort.each do |c|
    r <<  "\t#{c}"
  end
  r <<  ""
  r <<  "OPTIONS:"
  r.join("\n")
end

#run ⇒ Object 



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# File 'lib/vbox/cli.rb', line 33

def run
  @options = { :verbose => 0 }
  optparser = OptionParser.new do |opts|
    opts.banner = banner

    opts.on "-m", "--[no-]multiple",
    "(default: auto) assume <vm_name> is a wildcard,",
    "and run on multiple VMs.",
    "All glob(7) patterns like *,?,[a-z] are supported",
    "plus additional pattern {1-20} which matches","a sequence of numbers: 1,2,3,...,19,20" do |x|
      @options[:multiple] = x
    end
    opts.on "-n", "--dry-run", "do not change anything, just print commands to be invoked" do
      @options[:dry_run] = true
    end
    opts.on "-v", "--verbose", "increase verbosity" do
      @options[:verbose] ||= 0
      @options[:verbose] += 1
    end
    opts.on "-c", "--clones N", Integer, "clone: make N clones" do |x|
      @options[:clones] = x
    end
    a = 'new last take make'.split.map{ |x| [x, x.upcase] }.flatten
    opts.on "-snapshot", "--snapshot MODE", a, "clone: use LAST shapshot or make NEW" do |x|
      @options[:snapshot] = x.downcase
    end
    opts.on "-H", "--headless", "start: start VM in headless mode" do
      @options[:headless] = true
    end
    opts.on "-h", "--help", "show this message" do
      puts @help
      exit
    end
  end
  @help = optparser.help
  @argv = optparser.parse(@argv)

  # disable glob matching if first arg is a UUID
  unless @options.key?(:multiple)
    @options[:multiple] = "{#{@argv.first}}" !~ UUID_RE
  end

  @vbox = VBOX::CmdLineAPI.new(@options)

  if @argv.size == 0 || @argv.last == 'list'
    vms = @vbox.list_vms
    @vbox.list_vms(:running => true).each do |vm|
      vms.find{ |vm1| vm1.uuid == vm.uuid }.state = :running
    end

    if @argv.size == 2 && @argv.last == 'list'
      if @options[:multiple]
        @globs = _expand_glob(@argv.first).flatten
        vms = vms.keep_if{ |vm| _fnmatch(vm.name) }
      else
        vms = vms.keep_if{ |vm| vm.name == @argv.first }
      end
    end

    longest = (vms.map(&:name).map(&:size)+[4]).max

    puts "%-*s %5s %6s  %-12s %s".gray % [longest, *%w'NAME MEM DIRSZ STATE UUID']
    vms.each do |vm|
      if @options[:verbose] > 0
        @vbox.get_vm_details vm
        state = (vm.state == :poweroff) ? '' : vm.state.to_s.upcase
        s = sprintf "%-*s %5d %6s  %-12s %s", longest, vm.name, vm.memory_size||0, vm.dir_size||0,
          state, vm.uuid
      else
        state = (vm.state == :poweroff) ? '' : vm.state.to_s.upcase
        s = sprintf "%-*s %5s %6s  %-12s %s", longest, vm.name, '', '',
          state, vm.uuid
      end
      s = s.green if vm.state == :running
      puts s
    end
  else
    name = @argv.shift
    cmd  = @argv.shift || 'show' # default command is 'show'

    cmd = ALIASES[cmd] if ALIASES[cmd]
    if @options[:multiple]
      _run_multiple_cmd cmd, name
    else
      _run_cmd cmd, name
    end
  end
end