introduces new command "fail2ban-python", as automatically created symlink to python executable, where fail2ban currently installed (resp. its modules are located);

fixed pythonic filters and test scripts (running via "fail2ban-python" now);
fixed test case "testSetupInstallRoot" not for default python (also using direct call, out of virtualenv);

# Conflicts:
#	config/filter.d/ignorecommands/apache-fakegooglebot
#	fail2ban/tests/files/config/apache-auth/digest.py
#	fail2ban/tests/files/ignorecommand.py
#	fail2ban/tests/misctestcase.py

bin/fail2ban-testcases

@@ -38,11 +38,14 @@ if os.path.exists("fail2ban/__init__.py"):
 from fail2ban.version import version
 
 from fail2ban.tests.utils import gatherTests
-from fail2ban.helpers import FormatterWithTraceBack, getLogger
+from fail2ban.helpers import updatePyExec, FormatterWithTraceBack, getLogger
 from fail2ban.server.mytime import MyTime
 
 from optparse import OptionParser, Option
 
+# Update fail2ban-python env to current python version (where f2b-modules located/installed)
+updatePyExec(os.path.dirname(__file__))
+
 def get_opt_parser():
 	# use module docstring for help output
 	p = OptionParser(

config/filter.d/ignorecommands/apache-fakegooglebot

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env fail2ban-python
 # Inspired by https://isc.sans.edu/forums/diary/When+Google+isnt+Google/15968/
 #
 # Written in Python to reuse built-in Python batteries and not depend on

fail2ban/helpers.py

@@ -113,6 +113,24 @@ class FormatterWithTraceBack(logging.Formatter):
 		return logging.Formatter.format(self, record)
 
 
+def updatePyExec(bindir, executable=None):
+	"""Update fail2ban-python link to current python version (where f2b-modules located/installed)
+	"""
+	bindir = os.path.realpath(bindir)
+	if executable is None:
+		executable = sys.executable
+	pypath = os.path.join(bindir, 'fail2ban-python')
+	# if not exists or point to another version - update link:
+	isfile = os.path.isfile(pypath)
+	if not isfile or os.path.realpath(pypath) != os.path.realpath(executable):
+		if isfile:
+			os.unlink(pypath)
+		os.symlink(executable, pypath)
+	# extend current environment path (e.g. if fail2ban not yet installed):
+	if bindir not in os.environ["PATH"].split(os.pathsep):
+		os.environ["PATH"] = os.environ["PATH"] + os.pathsep + bindir;
+
+
 def getLogger(name):
 	"""Get logging.Logger instance with Fail2Ban logger name convention
 	"""

fail2ban/tests/files/config/apache-auth/digest.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env fail2ban-python
 import requests
 
 try:

fail2ban/tests/files/ignorecommand.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env fail2ban-python
 import sys
 if sys.argv[1] == "10.0.0.1":
 	exit(0)

fail2ban/tests/misctestcase.py

@@ -70,6 +70,17 @@ class HelpersTest(unittest.TestCase):
 		self.assertEqual(splitwords(' 1\n  2, 3'), ['1', '2', '3'])
 
 
+def _getSysPythonVersion():
+	import subprocess, locale
+	sysVerCmd = "fail2ban-python -c 'import sys; print(tuple(sys.version_info))'"
+	if sys.version_info >= (2,7):
+		sysVer = subprocess.check_output(sysVerCmd, shell=True)
+	else:
+		sysVer = subprocess.Popen(sysVerCmd, shell=True, stdout=subprocess.PIPE).stdout.read()
+	if sys.version_info >= (3,):
+		sysVer = sysVer.decode(locale.getpreferredencoding(), 'replace')
+	return str(sysVer).rstrip()
+
 class SetupTest(unittest.TestCase):
 
 	def setUp(self):
@@ -79,6 +90,12 @@ class SetupTest(unittest.TestCase):
 			raise unittest.SkipTest(
 				"Seems to be running not out of source distribution"
 				" -- cannot locate setup.py")
+		# compare current version of python installed resp. active one:
+		sysVer = _getSysPythonVersion()
+		if sysVer != str(tuple(sys.version_info)):
+			raise unittest.SkipTest(
+				"Seems to be running with python distribution %s"
+				" -- install can be tested only with system distribution %s" % (str(tuple(sys.version_info)), sysVer))
 
 	def testSetupInstallRoot(self):
 		if not self.setup:
@@ -125,6 +142,10 @@ class SetupTest(unittest.TestCase):
 					  'etc/fail2ban/jail.conf'):
 				self.assertTrue(os.path.exists(os.path.join(tmp, f)),
 								msg="Can't find %s" % f)
+			self.assertEqual(
+				os.path.realpath(os.path.join(tmp, 'usr/local/bin/fail2ban-python')),
+				os.path.realpath(sys.executable))
+
 		finally:
 			# clean up
 			shutil.rmtree(tmp)

setup.py

@@ -40,12 +40,46 @@ except ImportError:
 	# python 2.x
 	from distutils.command.build_py import build_py
 	from distutils.command.build_scripts import build_scripts
+# all versions
+from distutils.command.install_scripts import install_scripts
+
 import os
 from os.path import isfile, join, isdir, realpath
 import sys
 import warnings
 from glob import glob
 
+
+def updatePyExec(bindir, executable=None):
+	"""Update fail2ban-python link to current python version (where f2b-modules located/installed)
+	"""
+	bindir = os.path.realpath(bindir)
+	if executable is None:
+		executable = sys.executable
+	pypath = os.path.join(bindir, 'fail2ban-python')
+	# if not exists or point to another version - update link:
+	isfile = os.path.isfile(pypath)
+	if not isfile or os.path.realpath(pypath) != os.path.realpath(executable):
+		if isfile:
+			os.unlink(pypath)
+		os.symlink(executable, pypath)
+
+
+# Wrapper to install python binding (to current python version):
+class install_scripts_f2b(install_scripts):
+
+	def get_outputs(self):
+		outputs = install_scripts.get_outputs(self)
+		fn = None
+		for fn in outputs:
+			if os.path.basename(fn) == 'fail2ban-server':
+				break
+		bindir = os.path.dirname(fn)
+		print('creating fail2ban-python binding -> %s' % (bindir,))
+		updatePyExec(bindir)
+		return outputs
+
+
 if setuptools and "test" in sys.argv:
 	import logging
 	logSys = logging.getLogger("fail2ban")
@@ -113,12 +147,16 @@ setup(
 	url = "http://www.fail2ban.org",
 	license = "GPL",
 	platforms = "Posix",
-	cmdclass = {'build_py': build_py, 'build_scripts': build_scripts},
+	cmdclass = {
+		'build_py': build_py, 'build_scripts': build_scripts, 
+		'install_scripts': install_scripts_f2b
+	},
 	scripts = [
 		'bin/fail2ban-client',
 		'bin/fail2ban-server',
 		'bin/fail2ban-regex',
 		'bin/fail2ban-testcases',
+		# 'bin/fail2ban-python', -- link (binary), will be installed via install_scripts_f2b wrapper
 	],
 	packages = [
 		'fail2ban',