Add file-filter flag to polymer deploy

pkg/polymer/lib/src/build/runner.dart

Index: pkg/polymer/lib/src/build/runner.dart
===================================================================
--- pkg/polymer/lib/src/build/runner.dart	(revision 38021)
+++ pkg/polymer/lib/src/build/runner.dart	(working copy)
@@ -38,6 +38,10 @@
   /// Directory where to generate code, if any.
   final String outDir;
 
+  /// Disregard files that match these filters when copying in non
+  /// transformed files
+  List<String> fileFilter;
+
   /// Whether to print error messages using a json-format that tools, such as
   /// the Dart Editor, can process.
   final bool machineFormat;
@@ -54,7 +58,8 @@
   BarbackOptions(this.phases, this.outDir, {currentPackage, String packageHome,
       packageDirs, this.transformTests: false, this.machineFormat: false,
       this.followLinks: false,
-      this.packagePhases: const {}})
+      this.packagePhases: const {},
+      this.fileFilter: const []})
       : currentPackage = (currentPackage != null
           ? currentPackage : readCurrentPackageFromPubspec()),
         packageHome = packageHome,
@@ -122,6 +127,10 @@
   return map;
 }
 
+bool shouldSkip(List<String> filters, String path) {
+  return filters.any((filter) => path.contains(filter));
+}
+
 /// Return the relative path of each file under [subDir] in [package].
 Iterable<String> _listPackageDir(String package, String subDir,
     BarbackOptions options) {
@@ -131,6 +140,7 @@
   if (!dir.existsSync()) return const [];
   return dir.listSync(recursive: true, followLinks: options.followLinks)
       .where((f) => f is File)
+      .where((f) => !shouldSkip(options.fileFilter, f.path))
       .map((f) => path.relative(f.path, from: packageDir));
 }
 
@@ -287,7 +297,6 @@
 
   // Copy all the files we didn't process
   var dirs = options.packageDirs;
-
   return Future.forEach(dirs.keys, (package) {
     return Future.forEach(_listPackageDir(package, 'lib', options), (relpath) {
       var inpath = path.join(dirs[package], relpath);