From 9e0ff3a550f69dfec3cd04bacef885d24819f4a4 Mon Sep 17 00:00:00 2001
From: Davanum Srinivas <davanum@gmail.com>
Date: Tue, 31 May 2016 08:08:03 -0400
Subject: [PATCH] Check conflicts script

Use pkg_resources.require to report conflicts to ensure
co-installability.

Co-Authored-By: Igor Yozhikov <iyozhikov@mirantis.com>
Change-Id: I7443496b6a06d02bb9cc9457b729dea71451f44a
---
 .../cmds/check_conflicts.py                   | 58 +++++++++++++++++++
 setup.cfg                                     |  1 +
 tox.ini                                       |  1 +
 3 files changed, 60 insertions(+)
 create mode 100644 openstack_requirements/cmds/check_conflicts.py

diff --git a/openstack_requirements/cmds/check_conflicts.py b/openstack_requirements/cmds/check_conflicts.py
new file mode 100644
index 0000000000..22ea0c89cc
--- /dev/null
+++ b/openstack_requirements/cmds/check_conflicts.py
@@ -0,0 +1,58 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+"""Apply validation rules to the various requirements lists.
+
+"""
+
+import argparse
+import sys
+import traceback
+
+import pkg_resources
+
+from openstack_requirements import requirement
+
+
+def read_requirements_file(filename):
+    with open(filename, 'rt') as f:
+        body = f.read()
+    return requirement.parse(body)
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        'upper_constraints',
+        default='upper-constraints.txt',
+        help='path to the upper-constraints.txt file',
+    )
+    args = parser.parse_args()
+
+    error_count = 0
+
+    print('\nChecking %s' % args.upper_constraints)
+    upper_constraints = read_requirements_file(args.upper_constraints)
+    for name, spec_list in upper_constraints.items():
+        try:
+            if name:
+                print('Checking conflicts for %s' % name)
+                pyver = "python_version=='%s.%s'" % (sys.version_info[0],
+                                                     sys.version_info[1])
+                for req, original_line in spec_list:
+                    if req.markers in ["", pyver]:
+                        pkg_resources.require(name)
+        except pkg_resources.ContextualVersionConflict:
+            traceback.print_exc(file=sys.stdout)
+            error_count += 1
+
+    return 1 if error_count else 0
diff --git a/setup.cfg b/setup.cfg
index 9533c88c31..e1c809662b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -32,6 +32,7 @@ source-dir = doc/source
 console_scripts =
     edit-constraints = openstack_requirements.cmds.edit_constraint:main
     generate-constraints = openstack_requirements.cmds.generate:main
+    check-conflicts = openstack_requirements.cmds.check_conflicts:main
     update-requirements = openstack_requirements.cmds.update:main
     validate-constraints = openstack_requirements.cmds.validate:main
     validate-projects = openstack_requirements.cmds.validate_projects:main
diff --git a/tox.ini b/tox.ini
index ffb646588c..4a57dd1723 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ commands =
 
 [testenv:py27-with-upper-constraints]
 deps = -r{toxinidir}/upper-constraints.txt
+commands = check-conflicts {toxinidir}/upper-constraints.txt
 
 [testenv:venv]
 commands = {posargs}