Populate server version an client user-agent.

Include both caucase name and its current version number.
Add versioneer for version number introspection, producing egg version and
caucase.__version__.

.coveragerc

@@ -3,3 +3,4 @@ branch = true
 concurrency = thread
 parallel = true
 source = caucase
+omit = caucase/_version.py

.gitattributes

+caucase/_version.py export-subst

.pylintrc

+[MASTER]
+ignore=_version.py
+
 [MESSAGES CONTROL]
 disable=C0103,C0330,R0903,R0913,R0914,R0912,R0915,R0902
 # C0103 "Invalid name "%s" (should match %s)"

MANIFEST.in

 include CHANGES.txt
 include COPYING
+include versioneer.py
+include caucase/_version.py

caucase/__init__.py

@@ -18,3 +18,7 @@
 """
 Caucase - Certificate Authority for Users, Certificate Authority for SErvices
 """
+from __future__ import absolute_import
+from ._version import get_versions
+__version__ = get_versions()['version']
+del get_versions

caucase/client.py

@@ -29,6 +29,7 @@ from cryptography import x509
 from cryptography.hazmat.backends import default_backend
 import cryptography.exceptions
 from . import utils
+from . import version
 
 __all__ = (
   'CaucaseError',
@@ -153,6 +154,7 @@ class CaucaseClient(object):
   def _request(self, connection, method, url, body=None, headers=None):
     path = self._path + url
     headers = headers or {}
+    headers.setdefault('User-Agent', 'caucase ' + version.__version__)
     connection.request(method, path, body, headers)
     response = connection.getresponse()
     response_body = response.read()

caucase/http.py

@@ -40,6 +40,7 @@ from cryptography.hazmat.primitives import serialization
 import pem
 from . import exceptions
 from . import utils
+from . import version
 from .wsgi import Application
 from .ca import CertificateAuthority, UserCertificateAuthority, Extension
 from .storage import SQLite3Storage
@@ -96,6 +97,8 @@ class CaucaseWSGIRequestHandler(WSGIRequestHandler):
   """
   Make WSGIRequestHandler logging more apache-like.
   """
+  server_version = 'caucased ' + version.__version__
+
   def log_date_time_string(self):
     """
     Apache-style date format.

caucase/version.py

+# This file is part of caucase
+# Copyright (C) 2018  Nexedi
+#     Vincent Pelletier <vincent@nexedi.com>
+#
+# caucase is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# caucase is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with caucase.  If not, see <http://www.gnu.org/licenses/>.
+"""
+For ease of internal import.
+"""
+from __future__ import absolute_import
+from ._version import get_versions
+__version__ = get_versions()['version']
+del get_versions

setup.cfg

+[versioneer]
+VCS = git
+style = pep440
+versionfile_source = caucase/_version.py
+versionfile_build = caucase/_version.py
+tag_prefix =
+parentdir_prefix = caucase-

setup.py

@@ -19,15 +19,17 @@
 from setuptools import setup, find_packages
 import glob
 import os
+import versioneer
 
 long_description = open("README.rst").read() + "\n"
 for f in sorted(glob.glob(os.path.join('caucase', 'README.*.rst'))):
   long_description += '\n' + open(f).read() + '\n'
-# long_description += open("CHANGES.txt").read() + "\n"
+  long_description += open("CHANGES.txt").read() + "\n"
 
 setup(
   name='caucase',
-  version='0.9.2',
+  version=versioneer.get_version(),
+  cmdclass=versioneer.get_cmdclass(),
   author='Vincent Pelletier',
   author_email='vincent@nexedi.com',
   description="Certificate Authority.",