Class: IRB::ExtendCommand::History

Inherits:
Nop show all
Defined in:
lib/irb/cmd/history.rb

Instance Attribute Summary

Attributes inherited from Nop

#irb_context

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Nop

category, description, execute, #initialize

Constructor Details

This class inherits a constructor from IRB::ExtendCommand::Nop

Class Method Details

.transform_args(args) ⇒ Object 



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# File 'lib/irb/cmd/history.rb', line 15

def self.transform_args(args)
  match = args&.match(/(-g|-G)\s+(?<grep>.+)\s*\n\z/)
  return unless match

  "grep: #{Regexp.new(match[:grep]).inspect}"
end

Instance Method Details

#execute(grep: nil) ⇒ Object 



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# File 'lib/irb/cmd/history.rb', line 22

def execute(grep: nil)
  formatted_inputs = irb_context.io.class::HISTORY.each_with_index.reverse_each.filter_map do |input, index|
    next if grep && !input.match?(grep)

    header = "#{index}: "

    first_line, *other_lines = input.split("\n")
    first_line = "#{header}#{first_line}"

    truncated_lines = other_lines.slice!(1..) # Show 1 additional line (2 total)
    other_lines << "..." if truncated_lines&.any?

    other_lines.map! do |line|
      " " * header.length + line
    end

    [first_line, *other_lines].join("\n") + "\n"
  end

  Pager.page_content(formatted_inputs.join)
end