Add version option for ostestr and subunit-trace

This commit adds a version option to os-testr commands. Users would like
to confirm the version when then face unexpected behavior of the command
like a bug.

Change-Id: I30ee9623c25f2ce2da0fab0b5e0a2795b46a2cd6

os_testr/generate_subunit.py

@@ -17,11 +17,19 @@
 import datetime
 import sys
 
+import pbr.version
 import subunit
 from subunit import iso8601
 
 
+__version__ = pbr.version.VersionInfo('os_testr').version_string()
+
+
 def main():
+    if '--version' in sys.argv:
+        print(__version__)
+        exit(0)
+
     start_time = datetime.datetime.fromtimestamp(float(sys.argv[1])).replace(
         tzinfo=iso8601.UTC)
     elapsed_time = datetime.timedelta(seconds=int(sys.argv[2]))

os_testr/os_testr.py

@@ -19,13 +19,19 @@ import os
 import subprocess
 import sys
 
+import pbr.version
 from subunit import run as subunit_run
 from testtools import run as testtools_run
 
 
+__version__ = pbr.version.VersionInfo('os_testr').version_string()
+
+
 def get_parser(args):
     parser = argparse.ArgumentParser(
         description='Tool to run openstack tests')
+    parser.add_argument('--version', action='version',
+                        version='%s' % __version__)
     list_files = parser.add_mutually_exclusive_group()
     list_files.add_argument('--blacklist_file', '-b',
                             help='Path to a blacklist file, this file '

os_testr/subunit2html.py

@@ -60,10 +60,12 @@ import sys
 import traceback
 from xml.sax import saxutils
 
+import pbr.version
 import subunit
 import testtools
 
-__version__ = '0.1'
+
+__version__ = pbr.version.VersionInfo('os_testr').version_string()
 
 
 class TemplateData(object):
@@ -701,6 +703,10 @@ class FileAccumulator(testtools.StreamResult):
 
 
 def main():
+    if '--version' in sys.argv:
+        print(__version__)
+        exit(0)
+
     if len(sys.argv) < 2:
         print("Need at least one argument: path to subunit log.")
         exit(1)

os_testr/subunit_trace.py

@@ -26,6 +26,7 @@ import os
 import re
 import sys
 
+import pbr.version
 import subunit
 import testtools
 
@@ -313,8 +314,13 @@ def print_summary(stream, elapsed_time):
                 stream.write(out_str)
 
 
+__version__ = pbr.version.VersionInfo('os_testr').version_string()
+
+
 def parse_args():
     parser = argparse.ArgumentParser()
+    parser.add_argument('--version', action='version',
+                        version='%s' % __version__)
     parser.add_argument('--no-failure-debug', '-n', action='store_true',
                         dest='print_failures', help='Disable printing failure '
                         'debug information in realtime')