Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Update local hacking checks for new flake8.

Remove hacking and friends from lower-constraints, they are not
needed in installations.

Change-Id: Ia4740a1dc343d7a4a303674d9377bc64f6df762b

lower-constraints.txt

@@ -7,8 +7,6 @@ doc8==0.6.0
 dogpile.cache==0.6.2
 eventlet==0.20.0
 fixtures==3.0.0
-flake8==2.6.2
-hacking==1.1.0
 Jinja2==2.10
 jsonschema==2.6.0
 keystonemiddleware==4.18.0

mistral/hacking/checks.py

@@ -26,12 +26,14 @@ import ast
 import re
 import six
 
+from hacking import core
 
 oslo_namespace_imports_dot = re.compile(r"import[\s]+oslo[.][^\s]+")
 oslo_namespace_imports_from_dot = re.compile(r"from[\s]+oslo[.]")
 oslo_namespace_imports_from_root = re.compile(r"from[\s]+oslo[\s]+import[\s]+")
 
 
+@core.flake8ext
 def no_assert_equal_true_false(logical_line):
     """Check for assertTrue/assertFalse sentences
 
@@ -47,6 +49,7 @@ def no_assert_equal_true_false(logical_line):
                "Use assertTrue(A) or assertFalse(A) instead")
 
 
+@core.flake8ext
 def no_assert_true_false_is_not(logical_line):
     """Check for assertIs/assertIsNot sentences
 
@@ -60,6 +63,7 @@ def no_assert_true_false_is_not(logical_line):
                "Use assertIs(A, B) or assertIsNot(A, B) instead")
 
 
+@core.flake8ext
 def check_oslo_namespace_imports(logical_line):
     if re.match(oslo_namespace_imports_from_dot, logical_line):
         msg = ("O323: '%s' must be used instead of '%s'.") % (
@@ -78,12 +82,14 @@ def check_oslo_namespace_imports(logical_line):
         yield(0, msg)
 
 
+@core.flake8ext
 def check_python3_xrange(logical_line):
     if re.search(r"\bxrange\s*\(", logical_line):
         yield(0, "M327: Do not use xrange(). 'xrange()' is not compatible "
               "with Python 3. Use range() or six.moves.range() instead.")
 
 
+@core.flake8ext
 def check_python3_no_iteritems(logical_line):
     msg = ("M328: Use six.iteritems() instead of dict.iteritems().")
 
@@ -91,6 +97,7 @@ def check_python3_no_iteritems(logical_line):
         yield(0, msg)
 
 
+@core.flake8ext
 def check_python3_no_iterkeys(logical_line):
     msg = ("M329: Use six.iterkeys() instead of dict.iterkeys().")
 
@@ -98,6 +105,7 @@ def check_python3_no_iterkeys(logical_line):
         yield(0, msg)
 
 
+@core.flake8ext
 def check_python3_no_itervalues(logical_line):
     msg = ("M330: Use six.itervalues() instead of dict.itervalues().")
 
@@ -144,6 +152,9 @@ class BaseASTChecker(ast.NodeVisitor):
 
 
 class CheckForLoggingIssues(BaseASTChecker):
+
+    name = "check_for_logging_issues"
+    version = "1.0"
     CHECK_DESC = ('M001 Using the deprecated Logger.warn')
     LOG_MODULES = ('logging', 'oslo_log.log')
 
@@ -262,14 +273,3 @@ class CheckForLoggingIssues(BaseASTChecker):
                 self.add_error(node.args[0])
 
         return super(CheckForLoggingIssues, self).generic_visit(node)
-
-
-def factory(register):
-    register(no_assert_equal_true_false)
-    register(no_assert_true_false_is_not)
-    register(check_oslo_namespace_imports)
-    register(CheckForLoggingIssues)
-    register(check_python3_no_iteritems)
-    register(check_python3_no_iterkeys)
-    register(check_python3_no_itervalues)
-    register(check_python3_xrange)

test-requirements.txt

@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking>=1.1.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0

tox.ini

@@ -112,9 +112,20 @@ extensions = .rst, .yaml, .mistral
 max-line-length = 80
 
 [hacking]
-local-check-factory = mistral.hacking.checks.factory
 import_exceptions = mistral._i18n
 
+[flake8:local-plugins]
+extension =
+    M001 = checks:CheckForLoggingIssues
+    M319 = checks:no_assert_equal_true_false
+    M320 = checks:no_assert_true_false_is_not
+    M327 = checks:check_python3_xrange
+    M328 = checks:check_python3_no_iteritems
+    M329 = checks:check_python3_no_iterkeys
+    M330 = checks:check_python3_no_itervalues
+    O323 = checks:check_oslo_namespace_imports
+paths = ./mistral/hacking
+
 [testenv:lower-constraints]
 deps =
   -c{toxinidir}/lower-constraints.txt