Module: Tainers::CLI

Defined in:
lib/tainers/cli.rb

Defined Under Namespace

Classes: Command

Class Method Summary collapse

Class Method Details

.from_file(file) ⇒ Object 



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# File 'lib/tainers/cli.rb', line 67

def self.from_file file
  Proc.new do
    File.open(file, "r") do |f|
      JSON.parse(f.read)
    end
  end
end

.from_json(json) ⇒ Object 



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# File 'lib/tainers/cli.rb', line 75

def self.from_json json
  Proc.new do
    JSON.parse json
  end
end

.from_stdin ⇒ Object 



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# File 'lib/tainers/cli.rb', line 61

def self.from_stdin
  Proc.new do
    JSON.parse(STDIN.read)
  end
end

.parse(parameters) ⇒ Object 



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# File 'lib/tainers/cli.rb', line 13

def self.parse parameters
  options = {}
  options[:spec_source] = from_stdin
  opt_parser = OptionParser.new do |opts|
    opts.banner = "Usage: tainers [opts] COMMAND"
    opts.separator ""
    opts.separator "Manipulate Tainer-managed containers, taking their specification in JSON (from STDIN by default)."
    opts.separator ""
    opts.separator "Specific options:"

    opts.on('-j JSON', '--json JSON', String, "Take container specification from the given JSON parameter.") do |j|
      options[:spec_source] = from_json(j)
    end

    opts.on('-f FILEPATH', '--file FILEPATH', String, "Take container specification from JSON in the given file.") do |f|
      options[:spec_source] = from_file(f)
    end

    opts.on('-p PREFIX', '--prefix PREFIX', String, "Use PREFIX as container name prefix (overriding whatever is in spec)") do |p|
      options['prefix'] = p
    end

    opts.on('-s SUFFIX', '--suffix SUFFIX', String, "Use SUFFIX as container name suffix (overriding whatever is in spec)") do |s|
      options['suffix'] = s
    end

    opts.on('-h', '--help') do
      print opts
      exit 0
    end

    opts.separator ""
    opts.separator "Commands:"
    Command.commands.each do |name, help|
      opts.separator ""
      opts.separator "    #{name}"
      opts.separator "          #{help}" if help.size > 0
    end
  end

  # Stop on first non-option param
  non_param = []
  args = opt_parser.order(parameters) {|p| non_param << p; opt_parser.terminate}
  spec = options.delete(:spec_source).call
  spec.update(options)
  [spec, non_param + args]
end

.run(parameters) ⇒ Object 



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# File 'lib/tainers/cli.rb', line 6

def self.run parameters
  spec, parameters = parse(parameters)
  cmd = Command.new(spec)
  cmd_name = parameters.shift
  cmd.send("#{cmd_name}_command".to_sym, *parameters)
end