Class: CKnife::CommandLine

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(f, s, o, opts) ⇒ CommandLine

Returns a new instance of CommandLine.



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# File 'lib/cknife/command_line.rb', line 6

def initialize(f, s, o, opts)
  self.option_file = f
  self.option_file_contents = s
  self.thor_output = o
  self.options = opts
end

Instance Attribute Details

#option_file ⇒ Object

Returns the value of attribute option_file.



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# File 'lib/cknife/command_line.rb', line 4

def option_file
  @option_file
end

#option_file_contents ⇒ Object

Returns the value of attribute option_file_contents.



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# File 'lib/cknife/command_line.rb', line 4

def option_file_contents
  @option_file_contents
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/cknife/command_line.rb', line 4

def options
  @options
end

#thor_output ⇒ Object

Returns the value of attribute thor_output.



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# File 'lib/cknife/command_line.rb', line 4

def thor_output
  @thor_output
end

Instance Method Details

#create_opt_file(connect_msg) ⇒ Object 



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# File 'lib/cknife/command_line.rb', line 37

def create_opt_file(connect_msg)
  if File.exists?(option_file)
    thor_output.say("A #{option_file} file is already present.")
    thor_output.say(connect_msg)
    return
  end

  write_option_file
  thor_output.say("Wrote #{option_file} to $CWD.")
  thor_output.say(connect_msg)
  thor_output.say("Remember to delete the #{option_file} file when you are finished.")
end

#dc(cmd) ⇒ Object

dump command?



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# File 'lib/cknife/command_line.rb', line 14

def dc(cmd)
  puts "PGPASSFILE=#{pg_pass_file} #{cmd}"
end

#delete_opt_file ⇒ Object 



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# File 'lib/cknife/command_line.rb', line 22

def delete_opt_file
  if !File.exists?(option_file)
    thor_output.say("No #{option_file} file to delete.")
    return
  end

  s = File.read(option_file)
  if s == option_file_contents
    File.unlink(option_file)
    thor_output.say("Deleted #{option_file} file.")
  else
    thor_output.say("The #{option_file} file's contents do not match what this tool would have generated. Assuming you are trying to delete a #{option_file} file that this tool did not generate, please inspect the file to ensure it contains what you expect, and then delete it yourself.", :red)
  end
end

#execute(cmd, input = nil) ⇒ Object 



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# File 'lib/cknife/command_line.rb', line 50

def execute(cmd, input = nil)
  return if !@session_ok
  dc(cmd) if options[:verbose]
  stdin, stdout, stderr, wait_thread = Open3.popen3(cmd)
  if input
    puts input if options[:verbose]
    stdin.write input
    stdin.close
  end
  output = stdout.read
  output += stderr.read
  $stdout.write output if options[:verbose]
  stdout.close
  stderr.close
  result = wait_thread.value.to_i

  if result != 0
    @session_ok = false
    msg = "An error occurred."
    msg += " If the --verbose flag is available for this command, you may try turning it on." if !options[:verbose]
    thor_output.say(msg, :red)
  end

  yield if block_given?
  output
end

#with_option_file ⇒ Object 



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# File 'lib/cknife/command_line.rb', line 77

def with_option_file
  if @session_live
    return yield
  end

  @session_live = true
  @session_ok = true

  existing_option_file = false
  if File.exists?(option_file)
    existing_option_file = true
    s = File.read(option_file)
    if s != option_file_contents
      thor_output.say("A #{option_file} file is present, but it does not match your database configuration. The contents of the #{option_file} file must exactly match what this tool would generate. Please reconcile the #{option_file} file with your configuration, and then try again. You can also delete the #{option_file} file since this tool generates one in order to do its job (and removes it after finishing).", :red)
      return
    end
  end

  write_option_file

  result = nil
  begin
    result = yield self # don't know what we're planning to do with the result here...
  ensure
    if !existing_option_file
      FileUtils.rm(option_file)
      if File.exists?(option_file)
        thor_output.say("Failed to remove #{option_file} file. Please remove it for your infrastructure's security.")
      end
    else
      thor_output.say("Left existing #{option_file} file on disk.", :yellow)
    end
  end

  @session_live = false
  result
end

#write_option_file ⇒ Object 



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# File 'lib/cknife/command_line.rb', line 18

def write_option_file
  File.open(option_file, "w", 0600) { |f| f.write option_file_contents }
end