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# frozen_string_literal: true require "stringio" require_relative "../pager" module IRB # :stopdoc: module Command class History < Base category "IRB" description "Shows the input history. `-g [query]` or `-G [query]` allows you to filter the output." def execute(arg) if (match = arg&.match(/(-g|-G)\s+(?<grep>.+)\s*\z/)) grep = Regexp.new(match[:grep]) end 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 end end # :startdoc: end
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