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4ee1f0fb5d
(https://github.com/ruby/irb/pull/761)
* Implement `history` command
Lists IRB input history with indices. Also aliased as `hist`.
* Add tests for `history` command
* Address feedback: `puts` with multiple arguments instead of `join`ing
* Address feedback: Handle nil from splitting an empty input string
* Refactor line truncation
* Add `-g` grep option to `history` command
* Add `history` command to README
* Remove unused `*args` parameter
* Allow spaces to be included in grep
* Allow `/` to be included in grep regex
* Handle `input` being an empty string
* Exclude "#{index}: " from matching the grep regex
* Add new line after joining
3f9eacbfa9
47 lines
1.2 KiB
Ruby
47 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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require "stringio"
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require_relative "nop"
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require_relative "../pager"
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module IRB
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# :stopdoc:
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module ExtendCommand
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class History < Nop
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category "IRB"
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description "Shows the input history. `-g [query]` or `-G [query]` allows you to filter the output."
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def self.transform_args(args)
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match = args&.match(/(-g|-G)\s+(?<grep>.+)\s*\n\z/)
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return unless match
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"grep: #{Regexp.new(match[:grep]).inspect}"
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end
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def execute(grep: nil)
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formatted_inputs = irb_context.io.class::HISTORY.each_with_index.reverse_each.filter_map do |input, index|
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next if grep && !input.match?(grep)
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header = "#{index}: "
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first_line, *other_lines = input.split("\n")
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first_line = "#{header}#{first_line}"
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truncated_lines = other_lines.slice!(1..) # Show 1 additional line (2 total)
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other_lines << "..." if truncated_lines&.any?
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other_lines.map! do |line|
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" " * header.length + line
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end
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[first_line, *other_lines].join("\n") + "\n"
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end
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Pager.page_content(formatted_inputs.join)
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end
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end
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end
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# :startdoc:
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end
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