Add a Repack tool to scons. This is used to compile linux resources

tools/data_pack/scons.py

+#!/usr/bin/python
+#
+# Copyright (c) 2009 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import sys
+
+def _SConsNodeToFile(file_node):
+  '''Convert a scons file Node object to a path on disk.'''
+  return str(file_node.rfile())
+
+
+def _Build(target, source, env):
+  '''Run the repack script.'''
+  data_pack_root_dir = env.subst('$CHROME_SRC_DIR/tools/data_pack')
+  sys.path.append(data_pack_root_dir)
+  import repack
+  sources = [_SConsNodeToFile(s) for s in source]
+  repack.RePack(_SConsNodeToFile(target[0]), sources)
+
+
+def _BuildStr(targets, sources, env):
+  '''This message gets printed each time the builder runs.'''
+  return "Repacking data files into %s" % str(targets[0].rfile())
+
+
+def _Scanner(file_node, env, path):
+  '''Repack files if repack.py or data_pack.py have changed.'''
+  data_pack_root_dir = env.subst('$CHROME_SRC_DIR/tools/data_pack')
+
+  files = []
+  for f in ('repack.py', 'data_pack.py'):
+    files.append(os.path.join(data_pack_root_dir, f))
+  return files
+
+
+#############################################################################
+## SCons Tool api methods below.
+def generate(env):
+  action = env.Action(_Build, _BuildStr)
+  scanner = env.Scanner(function=_Scanner, skeys=['.pak'])
+
+  builder = env.Builder(action=action,
+                        source_scanner=scanner,
+                        src_suffix='.pak')
+
+  # add our builder and scanner to the environment
+  env.Append(BUILDERS = {'Repack': builder})
+
+
+# Function name is mandated by newer versions of SCons.
+def exists(env):
+  return 1