Module: ClusterBomb::History

Included in:
BombShell
Defined in:
lib/cluster_bomb/history.rb

Constant Summary collapse

HISTORY_FILE = 
File.join(Configuration::HOME,'history')

Instance Method Summary collapse

Instance Method Details

#libedit? ⇒ Boolean

Cheesy check to see if libedit is in use – will affect history

Returns:

  • (Boolean) 


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# File 'lib/cluster_bomb/history.rb', line 31

def libedit?
  libedit = false
  # If NotImplemented then this might be libedit
  begin
    Readline.emacs_editing_mode
  rescue NotImplementedError
    libedit = true
  end
  libedit
end

#load_history(max_history = 500) ⇒ Object 



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# File 'lib/cluster_bomb/history.rb', line 16

def load_history(max_history=500)
  @max_history = max_history      
  return unless File.exists? HISTORY_FILE
  File.open(HISTORY_FILE, "r") do |f|
    c=0
    while line = f.gets
      Readline::HISTORY.push(line.strip)
      if c==0 && libedit? # libedit work-around 
        Readline::HISTORY.push(line.strip)
      end
      c+=1
    end
  end
end

#save_history ⇒ Object 



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# File 'lib/cluster_bomb/history.rb', line 6

def save_history
  save_history =  Readline::HISTORY.to_a.dup
  start=0
  start = save_history.length - @max_history if save_history.length > @max_history
  
  File.open(HISTORY_FILE, "w") do |f|
    save_history[start..-1].each {|l| f.puts(l)}
  end
end