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# frozen_string_literal: true require_relative "color" require_relative "version" module IRB module StartupMessage TIPS = [ 'Type "help" for commands, "help <cmd>" for details', '"show_doc method" to view documentation', '"ls [object]" to see methods and properties', '"ls [object] -g pattern" to filter methods and properties', '"edit method" to open the method\'s source in editor', '"cd object" to navigate into an object', '"show_source method" to view source code', '"copy expr" to copy the output to clipboard', '"debug" to start integration with the "debug" gem', '"history -g pattern" to search history', ].freeze class << self def display logo_lines = load_logo info_lines = build_info_lines output = if logo_lines combine_logo_and_info(logo_lines, info_lines) else info_lines.join("\n") end # Add a blank line to not immediately touch warning messages puts puts output puts end private def load_logo encoding = STDOUT.external_encoding || Encoding.default_external return nil unless encoding == Encoding::UTF_8 logo = IRB.send(:easter_egg_logo, :unicode_small) return nil unless logo logo.chomp.lines.map(&:chomp) end def build_info_lines version_line = "#{Color.colorize('IRB', [:BOLD])} v#{VERSION} - Ruby #{RUBY_VERSION}" tip_line = colorize_tip(TIPS.sample) dir_line = Color.colorize(short_pwd, [:CYAN]) [version_line, tip_line, dir_line] end def colorize_tip(tip) tip.gsub(/"[^"]*"/) { |match| Color.colorize(match, [:YELLOW]) } end def combine_logo_and_info(logo_lines, info_lines) max_lines = [logo_lines.size, info_lines.size].max lines = max_lines.times.map do |i| logo_part = logo_lines[i] || "" info_part = info_lines[i] || "" colored_logo = Color.colorize(logo_part, [:RED, :BOLD]) "#{colored_logo} #{info_part}" end lines.join("\n") end def short_pwd dir = Dir.pwd home = ENV['HOME'] if home && (dir == home || dir.start_with?("#{home}/")) dir = "~#{dir[home.size..]}" end dir end end end end
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