lib/gem-wrappers.rb in gem-wrappers-1.3.2 vs lib/gem-wrappers.rb in gem-wrappers-1.4.0

@@ -1,9 +1,12 @@
+require 'rbconfig'
 require 'gem-wrappers/environment'
 require 'gem-wrappers/installer'
 
 module GemWrappers
+  class Exception < Gem::Exception ; end
+  class NoWrapper < Exception ; end
 
   def self.environment
     @environment ||= GemWrappers::Environment.new
   end
 
@@ -34,20 +37,44 @@
 
   def self.wrappers_path
     installer.wrappers_path
   end
 
+  def self.wrapper_path(exe)
+    file = File.join(wrappers_path, exe)
+    if executable?(file)
+      file
+    else
+      raise GemWrappers::NoWrapper, "No wrapper: #{file}"
+    end
+  end
+
+  def self.installed_wrappers
+    executables_in_directory(wrappers_path).sort.uniq
+  end
+
+  def self.gems_executables
+    # do not use map(&:...) - for ruby 1.8.6 compatibility
+    @executables ||= GemWrappers::Specification.installed_gems.map{|gem| gem.executables }.inject{|sum, n| sum + n }.uniq || []
+  end
+
   def self.environment_file
     environment.file_name
   end
 
-  private
-
   def self.ruby_executables
-    bindir = RbConfig::CONFIG["bindir"].sub(/\/+\z/, '')
-    Dir.entries(bindir).select do |file|
-      path = "#{bindir}/#{file}"
-      !File.directory?(path) && File.executable?(path)
+    executables_in_directory(RbConfig::CONFIG["bindir"].sub(/\/+\z/, ''))
+  end
+  private_class_method :ruby_executables
+
+  def self.executables_in_directory(dir)
+    Dir.entries(dir).select do |file|
+      executable?(File.join(dir, file))
     end
   end
+  private_class_method :executables_in_directory
 
+  def self.executable?(path)
+    !File.directory?(path) && File.executable?(path)
+  end
+  private_class_method :executable?
 end