diff options
Diffstat (limited to 'lib/irb/command/history.rb')
-rw-r--r-- | lib/irb/command/history.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/irb/command/history.rb b/lib/irb/command/history.rb new file mode 100644 index 0000000000..90f87f9102 --- /dev/null +++ b/lib/irb/command/history.rb @@ -0,0 +1,45 @@ +# 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 |