class Pry::Command::WatchExpression

Public Instance Methods

options(opt) click to toggle source
# File lib/pry/commands/watch_expression.rb, line 29
def options(opt)
  opt.on :d, :delete,
    "Delete the watch expression with the given index. If no index is given; clear all watch expressions.",
    :optional_argument => true, :as => Integer
  opt.on :l, :list,
    "Show all current watch expressions and their values.  Calling watch with no expressions or options will also show the watch expressions."
end
process() click to toggle source
# File lib/pry/commands/watch_expression.rb, line 37
def process
  case
  when opts.present?(:delete)
    delete opts[:delete]
  when opts.present?(:list) || args.empty?
    list
  else
    add_hook
    add_expression(args)
  end
end

Private Instance Methods

add_expression(arguments) click to toggle source
# File lib/pry/commands/watch_expression.rb, line 89
def add_expression(arguments)
  expressions << Expression.new(_pry_, target, arg_string)
  output.puts "Watching #{Code.new(arg_string).highlighted}"
end
add_hook() click to toggle source
# File lib/pry/commands/watch_expression.rb, line 94
def add_hook
  hook = [:after_eval, :watch_expression]
  unless _pry_.hooks.hook_exists?(*hook)
    _pry_.hooks.add_hook(*hook) do |_, _pry_|
      eval_and_print_changed _pry_.output
    end
  end
end
delete(index) click to toggle source
# File lib/pry/commands/watch_expression.rb, line 55
def delete(index)
  if index
    output.puts "Deleting watch expression ##{index}: #{expressions[index-1]}"
    expressions.delete_at(index-1)
  else
    output.puts "Deleting all watched expressions"
    expressions.clear
  end
end
eval_and_print_changed(output) click to toggle source
# File lib/pry/commands/watch_expression.rb, line 80
def eval_and_print_changed(output)
  expressions.each do |expr|
    expr.eval!
    if expr.changed?
      output.puts "#{text.blue "watch"}: #{expr.to_s}"
    end
  end
end
expressions() click to toggle source
# File lib/pry/commands/watch_expression.rb, line 51
def expressions
  _pry_.config.watch_expressions ||= []
end
list() click to toggle source
# File lib/pry/commands/watch_expression.rb, line 65
def list
  if expressions.empty?
    output.puts "No watched expressions"
  else
    _pry_.pager.open do |pager|
      pager.puts "Listing all watched expressions:"
      pager.puts ""
      expressions.each_with_index do |expr, index|
        pager.print text.with_line_numbers(expr.to_s, index+1)
      end
      pager.puts ""
    end
  end
end