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9488494e6b
We didn't send any flags to the pager, as a result ansi codes were not applied unless the user had properly set up their LESS env variable. This was often not the case, resulting in broken and ugly output. This commit sends along the proper flags whenever we use the pager, regardless of the user's LESS variable
89 lines
2.3 KiB
Ruby
89 lines
2.3 KiB
Ruby
class Pry::Pager
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# @param [String] text
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# A piece of text to run through a pager.
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# @param [Symbol?] pager
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# `:simple` -- Use the pure ruby pager.
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# `:system` -- Use the system pager (less) or the environment variable
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# $PAGER if set.
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# `nil` -- Infer what pager to use from the environment. What this
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# really means is that JRuby and systems that do not have
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# access to 'less' will run through the pure ruby pager.
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def self.page(text, pager = nil)
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case pager
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when nil
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no_pager = !SystemPager.available?
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is_jruby = defined?(RUBY_ENGINE) && RUBY_ENGINE == "jruby"
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(is_jruby || no_pager) ? SimplePager.new(text).page : SystemPager.new(text).page
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when :simple
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SimplePager.new(text).page
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when :system
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SystemPager.new(text).page
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else
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raise "'#{pager}' is not a recognized pager."
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end
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end
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def self.page_size
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@page_size ||= begin
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require 'io/console'
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$stdout.winsize.first
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rescue
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27
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end
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end
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def initialize(text)
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@text = text
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end
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class SimplePager < Pry::Pager
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def page
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text_array = @text.lines.to_a
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text_array.each_slice(Pry::Pager.page_size) do |chunk|
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puts chunk.join
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break if chunk.size < Pry::Pager.page_size
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if text_array.size > Pry::Pager.page_size
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puts "\n<page break> --- Press enter to continue ( q<enter> to break ) --- <page break>"
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break if $stdin.gets.chomp == "q"
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end
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end
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end
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end
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class SystemPager < Pry::Pager
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def self.default_pager
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pager = ENV["PAGER"] || ""
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# Default to less, and make sure less is being passed the correct options
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if pager.strip.empty? or pager =~ /^less\s*/
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pager = "less -R -S -F -X"
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end
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pager
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end
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def self.available?
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if @system_pager.nil?
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@system_pager = begin
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pager_executable = default_pager.split(' ').first
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`which #{ pager_executable }`
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rescue
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false
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end
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else
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@system_pager
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end
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end
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def initialize(*)
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super
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@pager = SystemPager.default_pager
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end
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def page
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IO.popen(@pager, 'w') do |io|
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io.write @text
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end
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end
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end
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end
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