Class: Nucleon::Command::Bash

Inherits:
Object
  • Object
show all
Defined in:
lib/nucleon/command/bash.rb

Instance Method Summary collapse

Instance Method Details

#build(components = {}, overrides = nil, override_key = false) ⇒ Object

Command operations



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# File 'lib/nucleon/command/bash.rb', line 18

def build(components = {}, overrides = nil, override_key = false)
  command            = string(components[:command])
  flags              = array( components.has_key?(:flags) ? components[:flags] : [] )
  data               = string_map(hash( components.has_key?(:data) ? components[:data] : {} ))
  args               = array( components.has_key?(:args) ? components[:args] : [] )
  subcommand         = hash( components.has_key?(:subcommand) ? components[:subcommand] : {} )
  
  override_key       = command unless override_key
  override_key       = override_key.to_sym
  
  command_string     = command.dup
  subcommand_string  = ''
  
  escape_characters  = /[\'\"]+/
  escape_replacement = '\"'
  
  dash_pattern       = /^([\-]+)/
  assignment_pattern = /\=$/
  
  logger.info("Building command #{command}")
  logger.debug("Command flags: #{flags.inspect}")
  logger.debug("Command options: #{data.inspect}")
  logger.debug("Command arguments: #{args.inspect}")
  logger.debug("Command has sub command") unless subcommand.empty?
  
  logger.debug("Overrides: #{overrides.inspect}")
  logger.debug("Override key: #{override_key}")
  
  # Flags
  if overrides && overrides.has_key?(:flags)
    if overrides[:flags].is_a?(Hash)
      if overrides[:flags].has_key?(override_key)
        flags = array(overrides[:flags][override_key])
      end
    else
      flags = array(overrides[:flags])
    end
  end
  flags.each do |flag|
    flag = string(flag)
    if ! flag.empty?        
      if flag.match(dash_pattern)
        dashes = $1
      else
        dashes = ( flag.size == 1 ? '-' : '--' )  
      end
      command_string << " #{dashes}#{flag}"
    end
  end
  
  # Data
  if overrides && overrides.has_key?(:data)
    if overrides[:data].has_key?(override_key)
      data = hash(overrides[:data][override_key])
    else
      override = true
      overrides[:data].each do |key, value|
        if ! value.is_a?(String)
          override = false
        end
      end
      data = hash(overrides[:data]) if override
    end
  end
  data.each do |key, value|
    key   = string(key)
    value = string(value).strip.sub(escape_characters, escape_replacement)
    
    if key.match(dash_pattern)
      dashes = $1
    else
      dashes = ( key.size == 1 ? '-' : '--' )  
    end      
    space = ( key.match(assignment_pattern) ? '' : ' ' )  
    
    command_string << " #{dashes}#{key}#{space}\"#{value}\""
  end
  
  # Arguments
  if overrides && overrides.has_key?(:args)
    unless overrides[:args].empty?
      if overrides[:args].is_a?(Hash)
        if overrides[:args].has_key?(override_key)
          args = array(overrides[:args][override_key])
        end
      else
        args = array(overrides[:args])
      end
    end
  end
  args.each do |arg|
    arg = string(arg).sub(escape_characters, escape_replacement)
    
    unless arg.empty?
      command_string << " \"#{arg}\""
    end
  end
  
  # Subcommand
  subcommand_overrides = ( overrides ? overrides[:subcommand] : nil )
  if subcommand && subcommand.is_a?(Hash) && ! subcommand.empty?
    subcommand_string = build(subcommand, subcommand_overrides)
  end
  
  command_string = (command_string + ' ' + subcommand_string).strip
  
  logger.debug("Rendered command: #{command_string}")
  return command_string
end

#exec(options = {}, overrides = nil, &code) ⇒ Object 



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# File 'lib/nucleon/command/bash.rb', line 130

def exec(options = {}, overrides = nil, &code)
  config = Config.ensure(options)
  result = Nucleon.cli_run(build(export, overrides), config.import({ :ui => @ui }), &code)
  
  if result
    logger.debug("Command status: #{result.status}")
    logger.debug("Command output:\n#{result.output}")
    logger.debug("Command errors:\n#{result.errors}")
  else
    logger.debug("Command returned no result")
  end
  result
end

#executable(options) ⇒ Object

Utilities



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# File 'lib/nucleon/command/bash.rb', line 147

def executable(options)
  config = Config.ensure(options)
  
  return 'nucleon ' + config[:nucleon] if config.get(:nucleon, false)
  config[:command]
end

#normalize(reload) ⇒ Object

Command plugin interface



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# File 'lib/nucleon/command/bash.rb', line 9

def normalize(reload)
  super
  myself.command = executable(myself)    
  logger.info("Setting command executable to #{command}")
end