Address additional comments to tarball creation script

tools/create_tarball.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 
 # Script to build a tarball of the Dart source.
 #
 # The tarball includes all the source needed to build Dart. This
 # includes source in third_party. As part of creating the tarball the
 # files used to build Debian packages are copied to a top-level debian
 # directory. This makes it easy to build Debian packages from the
 # tarball.
 #
-# For building a Debian package renaming the tarball to follow the
-# Debian is needed.
+# For building a Debian package one need to the tarball to follow the
+# Debian naming rules upstream tar files.
 #
 #  $ mv dart-XXX.tar.gz dart_XXX.orig.tar.gz
 #  $ tar xf dart_XXX.orig.tar.gz
 #  $ cd dart_XXX
 #  $ debuild -us -uc
 
 import datetime
 import optparse
 import sys
 import tarfile
-import tempfile
 import utils
 
-from os import listdir, makedirs, remove, rmdir
-from os.path import basename, dirname, join, realpath, exists, isdir, split
+from os import listdir, makedirs
+from os.path import join, exists, split, dirname, abspath
 
 HOST_OS = utils.GuessOS()
+DART_DIR = abspath(join(__file__, '..', '..'))
 
 # TODO (16582): Remove this when the LICENSE file becomes part of
 # all checkouts.
 license = [
   'This license applies to all parts of Dart that are not externally',
   'maintained libraries. The external maintained libraries used by',
   'Dart are:',
   '',
   '7-Zip - in third_party/7zip',
   'JSCRE - in runtime/third_party/jscre',
@@ skipping 44 matching lines @@
   'OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.'
 ]
 
 # Flags.
 verbose = False
 
 # Name of the dart directory when unpacking the tarball.
 versiondir = ''
 
 # Ignore Git/SVN files, checked-in binaries, backup files, etc..
-ignoredPaths = ['out', 'tools/testing/bin'
+ignoredPaths = ['tools/testing/bin'
                 'third_party/7zip', 'third_party/android_tools',
                 'third_party/clang', 'third_party/d8',
                 'third_party/firefox_jsshell']
 ignoredDirs = ['.svn', '.git']
 ignoredEndings = ['.mk', '.pyc', 'Makefile', '~']
 
 def BuildOptions():
   result = optparse.OptionParser()
   result.add_option("-v", "--verbose",
       help='Verbose output.',
       default=False, action="store_true")
   return result
 
 def Filter(tar_info):
-  _, tail = split(tar_info.name)
+  # Get the name of the file relative to the dart directory. Note the
+  # name from the TarInfo does not include a leading slash.
+  assert tar_info.name.startswith(DART_DIR[1:])
+  original_name = tar_info.name[len(DART_DIR):]
+  _, tail = split(original_name)
   if tail in ignoredDirs:
     return None
   for path in ignoredPaths:
-    if tar_info.name.startswith(path):
+    if original_name.startswith(path):
       return None
   for ending in ignoredEndings:
-    if tar_info.name.endswith(ending):
+    if original_name.endswith(ending):
       return None
-  # Add the dart directory name with version.
-  original_name = tar_info.name
-  # Place the debian directory one level over the rest which are
-  # placed in the directory 'dart'. This enables building the Debian
-  # packages out-of-the-box.
-  tar_info.name = join(versiondir, 'dart', tar_info.name)
+  # Add the dart directory name with version. Place the debian
+  # directory one level over the rest which are placed in the
+  # directory 'dart'. This enables building the Debian packages
+  # out-of-the-box.
+  tar_info.name = join(versiondir, 'dart', original_name)
   if verbose:
     print 'Adding %s as %s' % (original_name, tar_info.name)
   return tar_info
 
 def GenerateCopyright(filename):
   license_lines = license
   try:
-    # Currently the LICENSE file is part of a svn-root checkout.
-    lf = open('../LICENSE', 'r')
-    license_lines = lf.read().splitlines()
-    print license_lines
-    lf.close()
+    # TODO (16582): The LICENSE file is currently not in a normal the
+    # dart checkout.
+    with open(join(DART_DIR, 'LICENSE')) as lf:
+      license_lines = lf.read().splitlines()
   except:
     pass
 
-  f = open(filename, 'w')
-  f.write('Name: dart\n')
-  f.write('Maintainer: Dart Team <misc@dartlang.org>\n')
-  f.write('Source: https://code.google.com/p/dart/\n')
-  f.write('License:\n')
-  for line in license_lines:
-    f.write(' %s\n' % line)
-  f.close()
+  with open(filename, 'w') as f:
+    f.write('Name: dart\n')
+    f.write('Maintainer: Dart Team <misc@dartlang.org>\n')
+    f.write('Source: https://code.google.com/p/dart/\n')
+    f.write('License:\n')
+    for line in license_lines:
+      f.write(' %s\n' % line)
 
 def GenerateChangeLog(filename, version):
-  f = open(filename, 'w')
-  f.write('dart (%s-1) UNRELEASED; urgency=low\n' % version)
-  f.write('\n')
-  f.write('  * Generated file.\n')
-  f.write('\n')
-  f.write(' -- Dart Team <misc@dartlang.org>  %s\n' %
-          datetime.datetime.utcnow().strftime('%a, %d %b %Y %X +0000'))
-  f.close()
+  with open(filename, 'w') as f:
+    f.write('dart (%s-1) UNRELEASED; urgency=low\n' % version)
+    f.write('\n')
+    f.write('  * Generated file.\n')
+    f.write('\n')
+    f.write(' -- Dart Team <misc@dartlang.org>  %s\n' %
+            datetime.datetime.utcnow().strftime('%a, %d %b %Y %X +0000'))
 
 def GenerateSvnRevision(filename, svn_revision):
-  f = open(filename, 'w')
-  f.write(svn_revision)
-  f.close()
+  with open(filename, 'w') as f:
+    f.write(svn_revision)
 
 
 def CreateTarball():
+  global ignoredPaths  # Used for adding the output directory.
   # Generate the name of the tarfile
   version = utils.GetVersion()
   global versiondir
   versiondir = 'dart-%s' % version
   tarname = '%s.tar.gz' % versiondir
   debian_dir = 'tools/linux_dist_support/debian'
-  # Create the tar file in the out directory.
-  tardir = utils.GetBuildDir(HOST_OS, HOST_OS)
+  # Create the tar file in the build directory.
+  tardir = join(DART_DIR, utils.GetBuildDir(HOST_OS, HOST_OS))
+  # Don't include the build directory in the tarball.
+  ignoredPaths.append(tardir)
   if not exists(tardir):
     makedirs(tardir)
   tarfilename = join(tardir, tarname)
-  print 'Creating tarball: %s' % (tarfilename)
+  print 'Creating tarball: %s' % tarfilename
   with tarfile.open(tarfilename, mode='w:gz') as tar:
-    for f in listdir('.'):
-      tar.add(f, filter=Filter)
-    for f in listdir(debian_dir):
-      tar.add(join(debian_dir, f),
+    for f in listdir(DART_DIR):
+      tar.add(join(DART_DIR, f), filter=Filter)
+    for f in listdir(join(DART_DIR, debian_dir)):
+      tar.add(join(DART_DIR, debian_dir, f),
               arcname='%s/debian/%s' % (versiondir, f))
 
     with utils.TempDir() as temp_dir:
       # Generate and add debian/copyright
       copyright = join(temp_dir, 'copyright')
       GenerateCopyright(copyright)
       tar.add(copyright, arcname='%s/debian/copyright' % versiondir)
 
       # Generate and add debian/changelog
       change_log = join(temp_dir, 'changelog')
@@ skipping 15 matching lines @@
   parser = BuildOptions()
   (options, args) = parser.parse_args()
   if options.verbose:
     global verbose
     verbose = True
 
   CreateTarball()
 
 if __name__ == '__main__':
   sys.exit(Main())