Class: Bookbinder::Sheller

Inherits:
Object
  • Object
show all
Defined in:
lib/bookbinder/sheller.rb

Defined Under Namespace

Classes: DevNull

Constant Summary collapse

ShelloutFailure = 
Class.new(RuntimeError)

Instance Method Summary collapse

Instance Method Details

#get_stdout(command) ⇒ Object 



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# File 'lib/bookbinder/sheller.rb', line 46

def get_stdout(command)
  out = StringIO.new
  run_command(command, out: out)
  out.tap(&:rewind).read.chomp
end

#run_command(*command) ⇒ Object 



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# File 'lib/bookbinder/sheller.rb', line 15

def run_command(*command)
  out, err =
    if Hash === command.last
      command.last.values_at(:out, :err)
    else
      [DevNull.new, DevNull.new]
    end

  env_vars, executable =
    if Hash === command.first
      command[0..1]
    else
      [{}, command[0]]
    end

  exit_status = nil
  Open3.popen3(env_vars, executable) do |stdin, stdout, stderr, wait_thr|
    t = Thread.new do
      stdout.each do |line|
        out.puts(line)
      end
    end
    stderr.each do |line|
      err.puts(line)
    end
    t.join
    exit_status = wait_thr.value
  end
  exit_status
end