Improve tracing/logging system used in lib/naclports

lib/naclports/binary_package.py

 # Copyright (c) 2014 The Native Client 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 os
 import posixpath
 import shutil
 import tarfile
 
 from naclports import configuration, package, util, error
 
 PAYLOAD_DIR = 'payload'
 
 
 def InstallFile(filename, old_root, new_root):
   """Install a single file by moving it into a new location.
 
   Args:
     filename: Relative name of file to install.
     old_root: The current location of the file.
     new_root: The new desired root for the file.
   """
   oldname = os.path.join(old_root, filename)
 
-  util.Trace('install: %s' % filename)
+  util.LogVerbose('install: %s' % filename)
 
   newname = os.path.join(new_root, filename)
   dirname = os.path.dirname(newname)
   if not os.path.isdir(dirname):
     util.Makedirs(dirname)
   os.rename(oldname, newname)
 
 
 def RelocateFile(filename, dest):
   """Perform in-place mutations on file contents to handle new location.
@@ skipping 96 matching lines @@
   def _Install(self):
     dest = util.GetInstallRoot(self.config)
     dest_tmp = os.path.join(dest, 'install_tmp')
     if os.path.exists(dest_tmp):
       shutil.rmtree(dest_tmp)
 
     if self.IsAnyVersionInstalled():
       raise error.Error('package already installed: %s' % self.InfoString())
 
     self.LogStatus('Installing')
+    util.LogVerbose('installing from: %s' % self.filename)
     util.Makedirs(dest_tmp)
 
     names = []
     try:
       with tarfile.open(self.filename) as tar:
         for info in tar:
           if info.isdir():
             continue
           name = posixpath.normpath(info.name)
           if name == 'pkg_info':
@@ skipping 17 matching lines @@
       shutil.rmtree(dest_tmp)
 
     for name in names:
       RelocateFile(name, dest)
     self.WriteFileList(names)
     self.WriteStamp()
 
   def WriteStamp(self):
     """Write stamp file containing pkg_info."""
     filename = util.GetInstallStamp(self.NAME, self.config)
-    util.Trace('stamp: %s' % filename)
+    util.LogVerbose('stamp: %s' % filename)
     pkg_info = self.GetPkgInfo()
     with open(filename, 'w') as f:
       f.write(pkg_info)
 
   def WriteFileList(self, file_names):
     """Write the file list for this package."""
     filename = self.GetListFile()
     dirname = os.path.dirname(filename)
     if not os.path.isdir(dirname):
       util.Makedirs(dirname)
     with open(filename, 'w') as f:
       for name in file_names:
         f.write(name + '\n')