replace term-ansicolor with built-in colorization

lib/foreman/color.rb

@@ -0,0 +1,40 @@
+require "foreman"
+
+module Foreman::Color
+
+  ANSI = {
+    :reset          => 0,
+    :black          => 30,
+    :red            => 31,
+    :green          => 32,
+    :yellow         => 33,
+    :blue           => 34,
+    :magenta        => 35,
+    :cyan           => 36,
+    :white          => 37,
+    :bright_black   => 30,
+    :bright_red     => 31,
+    :bright_green   => 32,
+    :bright_yellow  => 33,
+    :bright_blue    => 34,
+    :bright_magenta => 35,
+    :bright_cyan    => 36,
+    :bright_white   => 37,
+  }
+
+  def self.enable(io)
+    io.extend(self)
+  end
+
+  def color?
+    return false unless self.respond_to?(:isatty)
+    self.isatty && ENV["TERM"]
+  end
+
+  def color(name)
+    return "" unless color?
+    return "" unless ansi = ANSI[name.to_sym]
+    "\e[#{ansi}m"
+  end
+
+end

lib/foreman/engine.rb

@@ -1,10 +1,10 @@
 require "foreman"
+require "foreman/color"
 require "foreman/process"
 require "foreman/procfile"
 require "foreman/utils"
 require "tempfile"
 require "timeout"
-require "term/ansicolor"
 require "fileutils"
 require "thread"
 
@@ -15,11 +15,10 @@ class Foreman::Engine
   attr_reader :directory
   attr_reader :options
 
-  extend Term::ANSIColor
+  COLORS = %w( cyan yellow green magenta red blue intense_cyan intense_yellow
+               intense_green intense_magenta intense_red, intense_blue )
 
-  COLORS = [ cyan, yellow, green, magenta, red, blue,
-             intense_cyan, intense_yellow, intense_green, intense_magenta,
-             intense_red, intense_blue ]
+  Foreman::Color.enable($stdout)
 
   def initialize(procfile, options={})
     @procfile  = Foreman::Procfile.new(procfile)
@@ -128,11 +127,11 @@ private ######################################################################
   rescue Errno::ECHILD
   end
 
-  def info(message, name="system", color=Term::ANSIColor.white)
+  def info(message, name="system", color=:white)
     output  = ""
-    output += color
+    output += $stdout.color(color)
     output += "#{Time.now.strftime("%H:%M:%S")} #{pad_process_name(name)} | "
-    output += Term::ANSIColor.reset
+    output += $stdout.color(:reset)
     output += message.chomp
     puts output
   end
@@ -182,8 +181,8 @@ private ######################################################################
   end
 
   def assign_colors
-    procfile.entries.each do |entry|
-      colors[entry.name] = next_color
+    procfile.entries.each_with_index do |entry, idx|
+      colors[entry.name] = COLORS[idx % COLORS.length]
     end
   end
 
@@ -191,13 +190,6 @@ private ######################################################################
     readers.invert[reader]
   end
 
-  def next_color
-    @current_color ||= -1
-    @current_color  +=  1
-    @current_color = 0 if COLORS.length < @current_color
-    COLORS[@current_color]
-  end
-
   def read_environment_files(filenames)
     environment = {}