Class: Makesure::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/makesure/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cmd, opts = {}) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/makesure/runner.rb', line 7

def initialize(cmd, opts = {})
  @cmd = cmd
  @opts = {
    :test => "val"
  }.merge(opts)
end

Instance Attribute Details

#cmd ⇒ Object

Returns the value of attribute cmd.



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# File 'lib/makesure/runner.rb', line 5

def cmd
  @cmd
end

Instance Method Details

#run! ⇒ Object 



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# File 'lib/makesure/runner.rb', line 14

def run!
  io = IO.popen(cmd)
  Makesure.log "Running cmd '#{cmd}' with pid #{io.pid}"

  Process.wait # needed to populate $?
  # seems to grab the exitstatus of the last cmd in a chain, ie:
  #   ls -al | grep -i file-that-exits                        # exits w/ 0
  #   ls -al | grep -i -file-that-does-not-exist              # exits w/ 1
  #   ls -al | grep -i -file-that-does-not-exist | echo "yay" # exits w/ 0
  exitstatus = $?.exitstatus

  Makesure.log "cmd exited with status #{exitstatus}"

  output = io.read

  unless exitstatus == 0
    Makesure.warn "oh shitttt something broke, tell everybody!"
    body = ""
    body << "[#{Time.now.to_s}] #{cmd.inspect} [pid #{io.pid}] exited with status #{exitstatus}, output follows:\n\n"
    body << output
    Makesure.send_alert("ERROR in command alert: #{cmd.inspect}", body)
  end

  if output.empty?
    Makesure.log "no output"
  else
    Makesure.log ">>> begin output"
    output.each_line do |l|
      Makesure.log l
    end
    Makesure.log "<<< end output"
  end
end