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Path: /opt/chef.upgrade/embedded/lib/ruby/gems/2.3.0/gems/pry-0.10.4/lib/pry/commands/

Viewing File: whereami.rb

class Pry
  class Command::Whereami < Pry::ClassCommand

    def initialize(*)
      super

      @method_code = nil
    end

    class << self
      attr_accessor :method_size_cutoff
    end

    @method_size_cutoff = 30

    match 'whereami'
    description 'Show code surrounding the current context.'
    group 'Context'

    banner <<-'BANNER'
      Usage: whereami [-qn] [LINES]

      Describe the current location. If you use `binding.pry` inside a method then
      whereami will print out the source for that method.

      If a number is passed, then LINES lines before and after the current line will be
      shown instead of the method itself.

      The `-q` flag can be used to suppress error messages in the case that there's
      no code to show. This is used by pry in the default before_session hook to show
      you when you arrive at a `binding.pry`.

      The `-n` flag can be used to hide line numbers so that code can be copy/pasted
      effectively.

      When pry was started on an Object and there is no associated method, whereami
      will instead output a brief description of the current object.
    BANNER

    def setup
      @file = expand_path(target.eval('__FILE__'))
      @line = target.eval('__LINE__')
      @method = Pry::Method.from_binding(target)
    end

    def options(opt)
      opt.on :q, :quiet,             "Don't display anything in case of an error"
      opt.on :n, :"no-line-numbers", "Do not display line numbers"
      opt.on :m, :"method", "Show the complete source for the current method."
      opt.on :c, :"class", "Show the complete source for the current class or module."
      opt.on :f, :"file", "Show the complete source for the current file."
    end

    def code
      @code ||= if opts.present?(:m)
                  method_code or raise CommandError, "Cannot find method code."
                elsif opts.present?(:c)
                  class_code or raise CommandError, "Cannot find class code."
                elsif opts.present?(:f)
                  Pry::Code.from_file(@file)
                elsif args.any?
                  code_window
                else
                  default_code
                end
    end

    def code?
      !!code
    rescue MethodSource::SourceNotFoundError
      false
    end

    def bad_option_combination?
      [opts.present?(:m), opts.present?(:f),
       opts.present?(:c), args.any?].count(true) > 1
    end

    def location
      "#{@file} @ line #{@line} #{@method && @method.name_with_owner}"
    end

    def process
      if bad_option_combination?
        raise CommandError, "Only one of -m, -c, -f, and  LINES may be specified."
      end

      if nothing_to_do?
        return
      elsif internal_binding?(target)
        handle_internal_binding
        return
      end

      set_file_and_dir_locals(@file)

      out = "\n#{text.bold('From:')} #{location}:\n\n" <<
        code.with_line_numbers(use_line_numbers?).with_marker(marker).highlighted << "\n"

      _pry_.pager.page out
    end

    private

    def nothing_to_do?
      opts.quiet? && (internal_binding?(target) || !code?)
    end

    def use_line_numbers?
      !opts.present?(:n)
    end

    def marker
      !opts.present?(:n) && @line
    end

    def top_level?
      target_self == Pry.main
    end

    def handle_internal_binding
      if top_level?
        output.puts "At the top level."
      else
        output.puts "Inside #{Pry.view_clip(target_self)}."
      end
    end

    def small_method?
      @method.source_range.count < self.class.method_size_cutoff
    end

    def default_code
      if method_code && small_method?
        method_code
      else
        code_window
      end
    end

    def code_window
      Pry::Code.from_file(@file).around(@line, window_size)
    end

    def method_code
      return @method_code if @method_code

      if valid_method?
        @method_code = Pry::Code.from_method(@method)
      end
    end

    # This either returns the `target_self`
    # or it returns the class of `target_self` if `target_self` is not a class.
    # @return [Pry::WrappedModule]
    def target_class
      target_self.is_a?(Module) ? Pry::WrappedModule(target_self) :
        Pry::WrappedModule(target_self.class)
    end

    def class_code
      return @class_code if @class_code

      mod = @method ? Pry::WrappedModule(@method.owner) : target_class

      idx = mod.candidates.find_index { |v| expand_path(v.source_file) == @file }
      @class_code = idx && Pry::Code.from_module(mod, idx)
    end

    def valid_method?
      @method && @method.source? && expand_path(@method.source_file) == @file &&
        @method.source_range.include?(@line)
    end

    def expand_path(f)
      return if !f

      if Pry.eval_path == f
        f
      else
        File.expand_path(f)
      end
    end

    def window_size
      if args.empty?
        _pry_.config.default_window_size
      else
        args.first.to_i
      end
    end
  end

  Pry::Commands.add_command(Pry::Command::Whereami)
  Pry::Commands.alias_command '@', 'whereami'
end