Add an architecture option to Debian package creation script

tools/create_debian_packages.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 Debian packages from a Dart tarball. The script
 # will build a source package and a 32-bit (i386) and 64-bit (amd64)
 # binary packages.
@@ skipping 13 matching lines @@
 DART_DIR = abspath(join(__file__, '..', '..'))
 
 def BuildOptions():
   result = optparse.OptionParser()
   result.add_option("--tar_filename",
                     default=None,
                     help="The tar file to build from.")
   result.add_option("--out_dir",
                     default=None,
                     help="Where to put the packages.")
+  result.add_option("-a", "--arch",
+      help='Target architectures (comma-separated).',
+      metavar='[all,ia32,x64]',
+      default='x64')
 
   return result
 
 def RunBuildPackage(opt, cwd):
   cmd = ['dpkg-buildpackage', '-j%d' % HOST_CPUS]
   cmd.extend(opt)
   process = subprocess.Popen(cmd,
                              stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                              cwd=cwd)
   (stdout, stderr) = process.communicate()
   if process.returncode != 0:
     raise Exception('Command \'%s\' failed: %s\nSTDOUT: %s' %
                     (' '.join(cmd), stderr, stdout))
 
-def BuildDebianPackage(tarball, out_dir):
+def BuildDebianPackage(tarball, out_dir, arch):
   version = utils.GetVersion()
   tarroot = 'dart-%s' % version
   origtarname = 'dart_%s.orig.tar.gz' % version
 
   if not exists(tarball):
     print 'Source tarball not found'
     return -1
 
   with utils.TempDir() as temp_dir:
     origtarball = join(temp_dir, origtarname)
     copyfile(tarball, origtarball)
 
     with tarfile.open(origtarball) as tar:
       tar.extractall(path=temp_dir)
 
     # Build source package.
     print "Building source package"
     RunBuildPackage(['-S', '-us', '-uc'], join(temp_dir, tarroot));
 
+    # Build 32-bit binary package.
+    if ('ia32' in arch):
+      print "Building i386 package"
+      RunBuildPackage(['-B', '-ai386', '-us', '-uc'], join(temp_dir, tarroot));
+
     # Build 64-bit binary package.
-    print "Building amd64 package"
-    RunBuildPackage(['-B', '-aamd64', '-us', '-uc'], join(temp_dir, tarroot));
+    if ('x64' in arch):
+      print "Building amd64 package"
+      RunBuildPackage(['-B', '-aamd64', '-us', '-uc'], join(temp_dir, tarroot));
 
     # Copy the Debian package files to the build directory.
     debbase = 'dart_%s' % version
     source_package = [
       '%s-1.dsc' % debbase,
       '%s.orig.tar.gz' % debbase,
       '%s-1.debian.tar.gz' % debbase
     ]
+    i386_package = [
+      '%s-1_i386.deb' % debbase
+    ]
     amd64_package = [
       '%s-1_amd64.deb' % debbase
     ]
 
     for name in source_package:
       copyfile(join(temp_dir, name), join(out_dir, name))
-    for name in amd64_package:
-      copyfile(join(temp_dir, name), join(out_dir, name))
+    if ('ia32' in arch):
+      for name in i386_package:
+        copyfile(join(temp_dir, name), join(out_dir, name))
+    if ('x64' in arch):
+      for name in amd64_package:
+        copyfile(join(temp_dir, name), join(out_dir, name))
 
 def Main():
   if HOST_OS != 'linux':
     print 'Debian build only supported on linux'
     return -1
 
   options, args = BuildOptions().parse_args()
   out_dir = options.out_dir
   tar_filename = options.tar_filename
+  if options.arch == 'all':
+    options.arch = 'ia32,x64'
+  arch = options.arch.split(',')
+
   if not options.out_dir:
     out_dir = join(DART_DIR, utils.GetBuildDir(HOST_OS, HOST_OS))
 
   if not tar_filename:
     tar_filename = join(DART_DIR,
                         utils.GetBuildDir(HOST_OS, HOST_OS),
                         'dart-%s.tar.gz' % utils.GetVersion())
 
-  BuildDebianPackage(tar_filename, out_dir)
+  BuildDebianPackage(tar_filename, out_dir, arch)
 
 if __name__ == '__main__':
   sys.exit(Main())