Single-sourcing the version string

pyquarantine/__init__.py

@@ -16,10 +16,12 @@ __all__ = [
     "QuarantineMilter",
     "generate_milter_config",
     "reload_config",
+    "cli",
     "mailer",
     "notifications",
-    "run",
     "quarantines",
+    "run",
+    "version",
     "whitelists"]
 
 name = "pyquarantine"

pyquarantine/cli.py

@@ -22,6 +22,7 @@ import time
 
 import pyquarantine
 
+from pyquarantine.version import __version__ as version
 
 def _get_quarantine_obj(config, quarantine):
     try:
@@ -302,6 +303,11 @@ def main():
         "-d", "--debug",
         help="Log debugging messages.",
         action="store_true")
+    parser.add_argument(
+        "-v", "--version",
+        help="Print version.",
+        action="version",
+        version="%(prog)s ({})".format(version))
     parser.set_defaults(syslog=False)
     subparsers = parser.add_subparsers(
         dest="command",

pyquarantine/run.py

@@ -22,6 +22,7 @@ import sys
 
 import pyquarantine
 
+from pyquarantine.version import __version__ as version
 
 def main():
     "Run PyQuarantine-Milter."
@@ -47,6 +48,11 @@ def main():
         "-t", "--test",
         help="Check configuration.",
         action="store_true")
+    parser.add_argument(
+        "-v", "--version",
+        help="Print version.",
+        action="version",
+        version="%(prog)s ({})".format(version))
     args = parser.parse_args()
 
     # setup logging

pyquarantine/version.py

@@ -0,0 +1 @@
+__version__ = "0.0.2"

setup.py

@@ -4,8 +4,11 @@ def read_file(fname):
     with open(fname, 'r') as f:
         return f.read()
 
+version = {}
+exec(read_file("pyquarantine/version.py"), version)
+
 setup(name = "pyquarantine",
-    version = "0.0.2",
+    version = version["__version__"],
     author = "Thomas Oettli",
     author_email = "spacefreak@noop.ch",
     description = "A pymilter based sendmail/postfix pre-queue filter.",