Refactor Tty.

Library/Homebrew/brew.rb

@@ -147,8 +147,8 @@ rescue Exception => e
   Utils::Analytics.report_exception(e)
   onoe e
   if internal_cmd && defined?(OS::ISSUES_URL)
-    $stderr.puts "#{Tty.white}Please report this bug:"
-    $stderr.puts "    #{Tty.em}#{OS::ISSUES_URL}#{Tty.reset}"
+    $stderr.puts "Please report this bug:"
+    $stderr.puts "    #{Tty.underline}#{OS::ISSUES_URL}#{Tty.reset}"
   end
   $stderr.puts e.backtrace
   exit 1

Library/Homebrew/cask/lib/hbc/artifact/moved.rb

@@ -81,11 +81,10 @@ module Hbc
         if target.exist?
           target_abv = " (#{target.abv})"
         else
-          warning = "Missing #{self.class.artifact_english_name}"
-          warning = "#{Tty.red}#{warning}#{Tty.reset}: "
+          error = "#{Tty.red}Missing #{self.class.artifact_english_name}:#{Tty.reset} "
         end
 
-        "#{warning}#{printable_target}#{target_abv}"
+        "#{error}#{printable_target}#{target_abv}"
       end
     end
   end

Library/Homebrew/cask/lib/hbc/cli/info.rb

@@ -27,7 +27,7 @@ module Hbc
       end
 
       def self.formatted_url(url)
-        "#{Tty.em}#{url}#{Tty.reset}"
+        "#{Tty.underline}#{url}#{Tty.reset}"
       end
 
       def self.installation_info(cask)

Library/Homebrew/cask/lib/hbc/cli/style.rb

@@ -30,7 +30,7 @@ module Hbc
           begin
             Homebrew.install_gem_setup_path! "rubocop-cask", RUBOCOP_CASK_VERSION, "rubocop"
           rescue SystemExit
-            raise CaskError, $stderr.string.chomp.sub("#{Tty.red}Error#{Tty.reset}: ", "")
+            raise CaskError, Tty.strip_ansi($stderr.string).chomp.sub(/\AError: /, "")
           end
         end
       end

Library/Homebrew/cask/lib/hbc/installer.rb

@@ -87,7 +87,7 @@ module Hbc
       s = if MacOS.version >= :lion && !ENV["HOMEBREW_NO_EMOJI"]
             (ENV["HOMEBREW_INSTALL_BADGE"] || "\xf0\x9f\x8d\xba") + "  "
           else
-            "#{Tty.blue}==>#{Tty.reset} #{Tty.white}Success!#{Tty.reset} "
+            "#{Tty.blue}==>#{Tty.reset} #{Tty.bold}Success!#{Tty.reset} "
           end
       s << "#{@cask} was successfully installed!"
     end

Library/Homebrew/cask/lib/hbc/utils.rb

@@ -32,11 +32,6 @@ end
 def odebug(title, *sput)
   return unless Hbc.respond_to?(:debug)
   return unless Hbc.debug
-
-  width = Tty.width * 4 - 6
-  if $stdout.tty? && title.to_s.length > width
-    title = title.to_s[0, width - 3] + "..."
-  end
   puts "#{Tty.magenta}==>#{Tty.reset} #{Tty.white}#{title}#{Tty.reset}"
   puts sput unless sput.empty?
 end
@@ -152,11 +147,11 @@ module Hbc
       <<-EOS.undent
         Most likely, this means you have an outdated version of Homebrew-Cask. Please run:
 
-            #{Tty.green}#{UPDATE_CMD}
+          #{Tty.green}#{UPDATE_CMD}#{Tty.reset}
 
-        #{Tty.reset}If this doesn’t fix the problem, please report this bug:
+        If this doesn’t fix the problem, please report this bug:
 
-            #{Tty.em}#{ISSUES_URL}#{Tty.reset}
+          #{Tty.underline}#{ISSUES_URL}#{Tty.reset}
 
       EOS
     end

Library/Homebrew/cmd/doctor.rb

@@ -42,7 +42,7 @@ module Homebrew
       next if out.nil? || out.empty?
       if first_warning
         $stderr.puts <<-EOS.undent
-            #{Tty.white}Please note that these warnings are just used to help the Homebrew maintainers
+            #{Tty.bold}Please note that these warnings are just used to help the Homebrew maintainers
             with debugging if you file an issue. If everything you use Homebrew for is
             working fine: please don't worry and just ignore them. Thanks!#{Tty.reset}
         EOS

Library/Homebrew/cmd/help.rb

@@ -78,11 +78,11 @@ module Homebrew
       HOMEBREW_HELP
     else
       help_lines.map do |line|
-        line.slice(2..-1)
-            .sub(/^  \* /, "#{Tty.highlight}brew#{Tty.reset} ")
-            .gsub(/`(.*?)`/, "#{Tty.highlight}\\1#{Tty.reset}")
-            .gsub(/<(.*?)>/, "#{Tty.em}\\1#{Tty.reset}")
-            .gsub("@hide_from_man_page", "")
+        line.slice(2..-1).
+          sub(/^  \* /, "#{Tty.bold}brew#{Tty.reset} ").
+          gsub(/`(.*?)`/, "#{Tty.bold}\\1#{Tty.reset}").
+          gsub(/<(.*?)>/, "#{Tty.underline}\\1#{Tty.reset}").
+          gsub("@hide_from_man_page", "")
       end.join.strip
     end
   end

Library/Homebrew/cmd/info.rb

@@ -117,7 +117,7 @@ module Homebrew
 
     puts "#{f.full_name}: #{specs * ", "}#{" [#{attrs * ", "}]" unless attrs.empty?}"
     puts f.desc if f.desc
-    puts "#{Tty.em}#{f.homepage}#{Tty.reset}" if f.homepage
+    puts "#{Tty.underline}#{f.homepage}#{Tty.reset}" if f.homepage
 
     conflicts = f.conflicts.map(&:name).sort!
     puts "Conflicts with: #{conflicts*", "}" unless conflicts.empty?
@@ -133,7 +133,7 @@ module Homebrew
       end
     end
 
-    puts "From: #{Tty.em}#{github_info(f)}#{Tty.reset}"
+    puts "From: #{Tty.underline}#{github_info(f)}#{Tty.reset}"
 
     unless f.deps.empty?
       ohai "Dependencies"

Library/Homebrew/cmd/update-report.rb

@@ -282,7 +282,7 @@ module Homebrew
     EOS
   rescue => e
     ofail <<-EOS.undent
-      #{Tty.white}Failed to migrate HOMEBREW_REPOSITORY to #{new_homebrew_repository}!
+      #{Tty.bold}Failed to migrate HOMEBREW_REPOSITORY to #{new_homebrew_repository}!#{Tty.reset}
       The error was:
         #{e}
       Please try to resolve this error yourself and then run `brew update` again to

Library/Homebrew/debrew.rb

@@ -111,7 +111,7 @@ module Debrew
 
     begin
       puts e.backtrace.first.to_s
-      puts "#{Tty.red}#{e.class.name}#{Tty.reset}: #{e}"
+      puts Formatter.error(e, label: e.class.name)
 
       loop do
         Menu.choose do |menu|

Library/Homebrew/descriptions.rb

@@ -124,7 +124,7 @@ class Descriptions
       short_name = short_names[full_name]
       printed_name = short_name_counts[short_name] == 1 ? short_name : full_name
       description = @descriptions[full_name] || blank
-      puts "#{Tty.white}#{printed_name}:#{Tty.reset} #{description}"
+      puts "#{Tty.bold}#{printed_name}:#{Tty.reset} #{description}"
     end
   end
 

Library/Homebrew/dev-cmd/bottle.rb

@@ -93,7 +93,7 @@ module Homebrew
       next unless ARGV.verbose? && !text_matches.empty?
       print_filename string, file
       text_matches.first(MAXIMUM_STRING_MATCHES).each do |match, offset|
-        puts " #{Tty.gray}-->#{Tty.reset} match '#{match}' at offset #{Tty.em}0x#{offset}#{Tty.reset}"
+        puts " #{Tty.gray}-->#{Tty.reset} match '#{match}' at offset #{Tty.bold}0x#{offset}#{Tty.reset}"
       end
 
       if text_matches.size > MAXIMUM_STRING_MATCHES

Library/Homebrew/exceptions.rb

@@ -318,7 +318,7 @@ class BuildError < RuntimeError
   def dump
     if !ARGV.verbose?
       puts
-      puts "#{Tty.red}READ THIS#{Tty.reset}: #{Tty.em}#{OS::ISSUES_URL}#{Tty.reset}"
+      puts "#{Tty.red.underline}READ THIS#{Tty.reset.red}:#{Tty.reset} #{Tty.underline}#{OS::ISSUES_URL}#{Tty.reset}"
       if formula.tap
         case formula.tap.name
         when "homebrew/boneyard"

Library/Homebrew/migrator.rb

@@ -153,7 +153,7 @@ class Migrator
     end
 
     begin
-      oh1 "Migrating #{Tty.green}#{oldname}#{Tty.white} to #{Tty.green}#{newname}#{Tty.reset}"
+      oh1 "Migrating #{Tty.green}#{oldname}#{Tty.reset} to #{Tty.green.bold}#{newname}#{Tty.reset}"
       lock
       unlink_oldname
       move_to_new_directory

Library/Homebrew/test/test_utils.rb

@@ -5,8 +5,11 @@ require "utils/shell"
 
 class TtyTests < Homebrew::TestCase
   def test_strip_ansi
-    assert_equal "hello",
-      Tty.strip_ansi("\033\[36;7mhello\033\[0m")
+    assert_equal "hello", Tty.strip_ansi("\033\[36;7mhello\033\[0m")
+  end
+
+  def test_width
+    assert_kind_of Integer, Tty.width
   end
 
   def test_truncate
@@ -21,15 +24,26 @@ class TtyTests < Homebrew::TestCase
 
   def test_no_tty_formatting
     $stdout.stubs(:tty?).returns false
-    assert_nil Tty.blue
-    assert_nil Tty.white
-    assert_nil Tty.red
-    assert_nil Tty.green
-    assert_nil Tty.gray
-    assert_nil Tty.yellow
-    assert_nil Tty.reset
-    assert_nil Tty.em
-    assert_nil Tty.highlight
+    assert_equal "", Tty.to_s
+    assert_equal "", Tty.red.to_s
+    assert_equal "", Tty.green.to_s
+    assert_equal "", Tty.yellow.to_s
+    assert_equal "", Tty.blue.to_s
+    assert_equal "", Tty.magenta.to_s
+    assert_equal "", Tty.cyan.to_s
+    assert_equal "", Tty.default.to_s
+  end
+
+  def test_formatting
+    $stdout.stubs(:tty?).returns(true)
+    assert_equal "",         Tty.to_s
+    assert_equal "\033[31m", Tty.red.to_s
+    assert_equal "\033[32m", Tty.green.to_s
+    assert_equal "\033[33m", Tty.yellow.to_s
+    assert_equal "\033[34m", Tty.blue.to_s
+    assert_equal "\033[35m", Tty.magenta.to_s
+    assert_equal "\033[36m", Tty.cyan.to_s
+    assert_equal "\033[39m", Tty.default.to_s
   end
 end
 

Library/Homebrew/utils.rb

@@ -10,85 +10,11 @@ require "utils/git"
 require "utils/analytics"
 require "utils/github"
 require "utils/curl"
-
-class Tty
-  class << self
-    def strip_ansi(string)
-      string.gsub(/\033\[\d+(;\d+)*m/, "")
-    end
-
-    def blue
-      bold 34
-    end
-
-    def white
-      bold 39
-    end
-
-    def magenta
-      bold 35
-    end
-
-    def red
-      underline 31
-    end
-
-    def yellow
-      underline 33
-    end
-
-    def reset
-      escape 0
-    end
-
-    def em
-      underline 39
-    end
-
-    def green
-      bold 32
-    end
-
-    def gray
-      bold 30
-    end
-
-    def highlight
-      bold 39
-    end
-
-    def width
-      `/usr/bin/tput cols`.strip.to_i
-    end
-
-    def truncate(str)
-      w = width
-      w > 10 ? str.to_s[0, w - 4] : str
-    end
-
-    private
-
-    def color(n)
-      escape "0;#{n}"
-    end
-
-    def bold(n)
-      escape "1;#{n}"
-    end
-
-    def underline(n)
-      escape "4;#{n}"
-    end
-
-    def escape(n)
-      "\033[#{n}m" if $stdout.tty?
-    end
-  end
-end
+require "utils/tty"
 
 def ohai(title, *sput)
   title = Tty.truncate(title) if $stdout.tty? && !ARGV.verbose?
-  puts "#{Tty.blue}==>#{Tty.white} #{title}#{Tty.reset}"
+  puts "#{Tty.blue}==>#{Tty.reset} #{Tty.bold}#{title}#{Tty.reset}"
   puts sput
 end
 
@@ -96,16 +22,16 @@ def oh1(title, options = {})
   if $stdout.tty? && !ARGV.verbose? && options.fetch(:truncate, :auto) == :auto
     title = Tty.truncate(title)
   end
-  puts "#{Tty.green}==>#{Tty.white} #{title}#{Tty.reset}"
+  puts "#{Tty.green}==>#{Tty.reset} #{Tty.bold}#{title}#{Tty.reset}"
 end
 
 # Print a warning (do this rarely)
 def opoo(warning)
-  $stderr.puts "#{Tty.yellow}Warning#{Tty.reset}: #{warning}"
+  $stderr.puts "#{Tty.yellow.underline}Warnin#{Tty.reset.yellow}g:#{Tty.reset} #{warning}"
 end
 
 def onoe(error)
-  $stderr.puts "#{Tty.red}Error#{Tty.reset}: #{error}"
+  $stderr.puts "#{Tty.red.underline}Error#{Tty.reset.red}:#{Tty.reset} #{error}"
 end
 
 def ofail(error)
@@ -171,9 +97,9 @@ def pretty_installed(f)
   if !$stdout.tty?
     f.to_s
   elsif Emoji.enabled?
-    "#{Tty.highlight}#{f} #{Tty.green}#{Emoji.tick}#{Tty.reset}"
+    "#{Tty.bold}#{f} #{Tty.green}#{Emoji.tick}#{Tty.reset}"
   else
-    "#{Tty.highlight}#{Tty.green}#{f} (installed)#{Tty.reset}"
+    "#{Tty.green.bold}#{f} (installed)#{Tty.reset}"
   end
 end
 
@@ -181,9 +107,9 @@ def pretty_uninstalled(f)
   if !$stdout.tty?
     f.to_s
   elsif Emoji.enabled?
-    "#{f} #{Tty.red}#{Emoji.cross}#{Tty.reset}"
+    "#{Tty.bold}#{f} #{Tty.red}#{Emoji.cross}#{Tty.reset}"
   else
-    "#{Tty.red}#{f} (uninstalled)#{Tty.reset}"
+    "#{Tty.red.bold}#{f} (uninstalled)#{Tty.reset}"
   end
 end
 

Library/Homebrew/utils/github.rb

@@ -14,7 +14,7 @@ module GitHub
       super <<-EOS.undent
         GitHub API Error: #{error}
         Try again in #{pretty_ratelimit_reset(reset)}, or create a personal access token:
-          #{Tty.em}https://github.com/settings/tokens/new?scopes=&description=Homebrew#{Tty.reset}
+          #{Tty.underline}https://github.com/settings/tokens/new?scopes=&description=Homebrew#{Tty.reset}
         and then set the token as: export HOMEBREW_GITHUB_API_TOKEN="your_new_token"
       EOS
     end
@@ -30,7 +30,7 @@ module GitHub
       if ENV["HOMEBREW_GITHUB_API_TOKEN"]
         message << <<-EOS.undent
           HOMEBREW_GITHUB_API_TOKEN may be invalid or expired; check:
-          #{Tty.em}https://github.com/settings/tokens#{Tty.reset}
+          #{Tty.underline}https://github.com/settings/tokens#{Tty.reset}
         EOS
       else
         message << <<-EOS.undent
@@ -38,7 +38,7 @@ module GitHub
           Clear them with:
             printf "protocol=https\\nhost=github.com\\n" | git credential-osxkeychain erase
           Or create a personal access token:
-            #{Tty.em}https://github.com/settings/tokens/new?scopes=&description=Homebrew#{Tty.reset}
+            #{Tty.underline}https://github.com/settings/tokens/new?scopes=&description=Homebrew#{Tty.reset}
           and then set the token as: export HOMEBREW_GITHUB_API_TOKEN="your_new_token"
         EOS
       end

Library/Homebrew/utils/tty.rb

@@ -0,0 +1,64 @@
+module Tty
+  module_function
+
+  def strip_ansi(string)
+    string.gsub(/\033\[\d+(;\d+)*m/, "")
+  end
+
+  def width
+    `/usr/bin/tput cols`.strip.to_i
+  end
+
+  def truncate(string)
+    (w = width).zero? ? string.to_s : string.to_s[0, w - 4]
+  end
+
+  COLOR_CODES = {
+    red: 31,
+    green: 32,
+    yellow: 33,
+    blue: 34,
+    magenta: 35,
+    cyan: 36,
+    default: 39,
+  }.freeze
+
+  STYLE_CODES = {
+    reset: 0,
+    bold: 1,
+    italic: 3,
+    underline: 4,
+    strikethrough: 9,
+    no_underline: 24,
+  }.freeze
+
+  CODES = COLOR_CODES.merge(STYLE_CODES).freeze
+
+  def append_to_escape_sequence(code)
+    @escape_sequence ||= []
+    @escape_sequence << code
+    self
+  end
+
+  def current_escape_sequence
+    return "" if @escape_sequence.nil?
+    "\033[#{@escape_sequence.join(";")}m"
+  end
+
+  def reset_escape_sequence!
+    @escape_sequence = nil
+  end
+
+  CODES.each do |name, code|
+    define_singleton_method(name) do
+      append_to_escape_sequence(code)
+    end
+  end
+
+  def to_s
+    return "" unless $stdout.tty?
+    current_escape_sequence
+  ensure
+    reset_escape_sequence!
+  end
+end