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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*\n\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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