Class: BlueShell::Bash

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

Constant Summary collapse

BufferedReader = 
java.io.BufferedReader
InputStreamReader = 
java.io.InputStreamReader

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#err ⇒ Object (readonly)

Returns the value of attribute err.



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# File 'lib/blue_shell/bash.rb', line 10

def err
  @err
end

#exit ⇒ Object (readonly)

Returns the value of attribute exit.



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# File 'lib/blue_shell/bash.rb', line 10

def exit
  @exit
end

#out ⇒ Object (readonly)

Returns the value of attribute out.



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# File 'lib/blue_shell/bash.rb', line 10

def out
  @out
end

Instance Method Details

#execute!(command, timeout = 30) ⇒ Object

Execute the given command. Will block until the command completes. param [String] the command to execute in bash param [Integer] the number of seconds to wait for it to complete



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# File 'lib/blue_shell/bash.rb', line 15

def execute!(command, timeout = 30)
  # Executing via a file seems clunky, but it is the best way to
  # ensure everything happens exactly as we expect it to without 
  # trying to deal with escaping the world properly.
  file = Tempfile.new('command')
  begin
    file << command
    file.flush

    Timeout::timeout(timeout) do
      proc = runtime.exec("/bin/bash #{file.path}")

      @out = ""
      @err = ""

      # Must have a sink for stdout for the proc to exit
      out_thread = read_thread(proc.getInputStream, @out)
      err_thread = read_thread(proc.getErrorStream, @err)

      out_thread.join
      err_thread.join

      @exit = proc.exitValue
    end
  ensure
    file.close
    file.unlink
  end
end