[PathList] Escape glob metacharacters

Closes #862

lib/cocoapods/sandbox/path_list.rb

@@ -47,7 +47,8 @@ def read_file_system
           raise Informative, "Attempt to read non existent folder `#{root}`."
         end
         root_length  = root.to_s.length+1
-        paths  = Dir.glob(root + "**/*", File::FNM_DOTMATCH)
+        escaped_root = escape_path_for_glob(root)
+        paths  = Dir.glob(escaped_root + "**/*", File::FNM_DOTMATCH)
         absolute_dirs  = paths.select { |path| File.directory?(path) }
         relative_dirs  = absolute_dirs.map  { |p| p[root_length..-1] }
         absolute_paths = paths.reject { |p| p == "#{root}/." || p == "#{root}/.." }
@@ -174,6 +175,25 @@ def dir_glob_equivalent_patterns(pattern)
         end
       end
 
+      # Escapes the glob metacharacters from a given path so it can used in
+      # Dir#glob and similar methods.
+      #
+      # @note   See CocoaPods/CocoaPods#862.
+      #
+      # @param  [String, Pathname] path
+      #         The path to escape.
+      #
+      # @return [Pathname] The escaped path.
+      #
+      def escape_path_for_glob(path)
+        result = path.to_s
+        characters_to_escape = ['[', ']', '{', '}', '?', '*']
+        characters_to_escape.each do |character|
+          result.gsub!(character, "\\#{character}" )
+        end
+        Pathname.new(result)
+      end
+
       #-----------------------------------------------------------------------#
 
     end

spec/unit/sandbox/path_list_spec.rb

@@ -38,6 +38,14 @@ module Pod
         dirs.sort.should == %w| Classes Resources Resources/sub_dir sub-dir sub-dir/sub-dir-2 |
       end
 
+      it "handles directories with glob metacharacters" do
+        root = temporary_directory + '[CP] Test'
+        root.mkpath
+        FileUtils.touch(root + 'Class.h')
+        @path_list = Sandbox::PathList.new(root)
+        @path_list.files.should == ["Class.h"]
+      end
+
     end
 
     #-------------------------------------------------------------------------#
@@ -122,6 +130,7 @@ module Pod
         end
       end
 
+      #--------------------------------------#
 
       describe "#directory?" do
         it "expands a pattern into all the combinations of Dir#glob literals" do
@@ -148,7 +157,22 @@ module Pod
             Classes/file.m
           ]
         end
+
       end
+
+      #--------------------------------------#
+
+      describe "#escape_path_for_glob" do
+
+        it "escapes metacharacters" do
+          escaped = @path_list.send(:escape_path_for_glob, '[]{}?**')
+          escaped.to_s.should == '\[\]\{\}\?\*\*'
+        end
+
+      end
+
+      #--------------------------------------#
+
     end
 
     #-------------------------------------------------------------------------#