[deb] Add control files.

Change-Id: I081d0dbb35a96810617c58b2ca99c02161122918

secop/version.py

@@ -0,0 +1,81 @@
+#  -*- coding: utf-8 -*-
+# *****************************************************************************
+# MLZ library of Tango servers
+# Copyright (c) 2015-2017 by the authors, see LICENSE
+#
+# This program 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 2 of the License, or (at your option) any later
+# version.
+#
+# This program 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
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#   Douglas Creager <dcreager@dcreager.net>
+#   This file is placed into the public domain.
+#
+# *****************************************************************************
+
+from __future__ import print_function
+
+import os.path
+from subprocess import Popen, PIPE
+
+__all__ = ['get_version']
+
+RELEASE_VERSION_FILE = os.path.join(os.path.dirname(__file__),
+                                    'RELEASE-VERSION')
+GIT_REPO = os.path.join(os.path.dirname(__file__), '..', '.git')
+
+
+def get_git_version(abbrev=4, cwd=None):
+    try:
+        p = Popen(['git', '--git-dir=%s' % GIT_REPO,
+                   'describe', '--abbrev=%d' % abbrev],
+                  stdout=PIPE, stderr=PIPE)
+        stdout, _stderr = p.communicate()
+        return stdout.strip().decode('utf-8', 'ignore')
+    except Exception:
+        return None
+
+
+def read_release_version():
+    try:
+        with open(RELEASE_VERSION_FILE) as f:
+            return f.readline().strip()
+    except Exception:
+        return None
+
+
+def write_release_version(version):
+    with open(RELEASE_VERSION_FILE, 'w') as f:
+        f.write("%s\n" % version)
+
+
+def get_version(abbrev=4):
+    # determine the version from git and from RELEASE-VERSION
+    git_version = get_git_version(abbrev)
+    release_version = read_release_version()
+
+    # if we have a git version, it is authoritative
+    if git_version:
+        if git_version != release_version:
+            write_release_version(git_version)
+        return git_version
+    elif release_version:
+        return release_version
+    else:
+        raise ValueError('Cannot find a version number - make sure that '
+                         'git is installed or a RELEASE-VERSION file is '
+                         'present!')
+
+
+if __name__ == "__main__":
+    print(get_version())