Validata that we are on the correct platform when creating linux distrubution packages

tools/bots/linux_distribution_support.py

 #!/usr/bin/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.
 
 """
 Buildbot steps for src tarball generation and debian package generation
 
 Package up the src of the dart repo and create a debian package.
@@ skipping 50 matching lines @@
   bot.Clobber(force=True)
   version = utils.GetVersion()
   builddir = os.path.join(bot_utils.DART_DIR,
                           utils.GetBuildDir(HOST_OS, HOST_OS),
                           'src_and_installation')
   if not os.path.exists(builddir):
     os.makedirs(builddir)
   tarfilename = 'dart-%s.tar.gz' % version
   tarfile = os.path.join(builddir, tarfilename)
 
+  with bot.BuildStep('Validating linux system'):
+    print 'Validating that we are on %s' % build_info.builder_tag
+    args = ['uname', '-a']
+    (stdout, stderr, exitcode) = bot_utils.run(args)
+    if exitcode != 0:
+      print "Could not find linux system, exiting"
+      sys.exit(1)
+
+    if build_info.builder_tag == "debian_wheezy":
+      if not "Debian" in stdout:
+        print "Trying to build debian bits on a non debian system"
+        sys.exit(1)
+    if build_info.builder_tag == "ubuntu_precise":
+      if not "Ubuntu" in stdout:
+        print "Trying to build ubuntu bits on a non ubuntu system"
+        sys.exit(1)
+
   with bot.BuildStep('Create src tarball'):
     args = [sys.executable, './tools/create_tarball.py', '--tar_filename',
             tarfile]
     print 'Building src tarball'
     bot.RunProcess(args)
     print 'Building Debian packages'
     args = [sys.executable, './tools/create_debian_packages.py',
             '--tar_filename', tarfile,
             '--out_dir', builddir]
     bot.RunProcess(args)
     
   with bot.BuildStep('Upload artifacts'):
     bot_name, _ = bot.GetBotName()
     channel = bot_utils.GetChannelFromName(bot_name)
     if channel != bot_utils.Channel.BLEEDING_EDGE:
       ArchiveArtifacts(tarfile, builddir, channel, build_info.builder_tag)
     else:
       print 'Not uploading artifacts on bleeding edge'
 
 if __name__ == '__main__':
   # We pass in None for build_step to avoid building the sdk.
   bot.RunBot(SrcConfig, SrcSteps, build_step=None)