Class: Keel::GCloud::Cli

Inherits:
Object
  • Object
show all
Defined in:
lib/keel/gcloud/cli.rb

Overview

A helper class to run system commands and handle interrupts.

Constant Summary collapse

@@wait_sequence = 
%w[| / - \\]

Instance Method Summary collapse

Instance Method Details

#execute(command) ⇒ Object 



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# File 'lib/keel/gcloud/cli.rb', line 9

def execute command
  begin
    out = ""
    Open3.popen3(command) do |stdout, stderr, stdin, thread|
      {
        while line=stderr.gets do
          out += line
        end
      }
      raise "error while processing. " + out unless thread.value.success?
      return out
    end
  rescue Interrupt
    puts 'Task interrupted.'
  end
end

#show_wait_spinner(fps = 10) ⇒ Object

better wait cursors, thanks stackoverflow.com/questions/10262235/printing-an-ascii-spinning-cursor-in-the-console



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# File 'lib/keel/gcloud/cli.rb', line 35

def (fps=10)
  chars = %w[| / - \\]
  delay = 1.0/fps
  iter = 0
   = Thread.new do
    while iter do  # Keep spinning until told otherwise
      print chars[(iter+=1) % chars.length]
      sleep delay
      print "\b"
    end
  end
  yield.tap{       # After yielding to the block, save the return value
    iter = false   # Tell the thread to exit, cleaning up after itself…
    .join   # …and wait for it to do so.
  }                # Use the block's return value as the method's
end

#system_call(command) ⇒ Object 



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# File 'lib/keel/gcloud/cli.rb', line 26

def system_call command
  begin
    system command
  rescue Interrupt
    puts 'Task interrupted.'
  end
end