Add Constraints support

Adding constraints support to libraries is slightly more complex than
services as the libraries themselves are listed in upper-constraints.txt
which leads to errors that you can't install a specific version and a
constrained version.

This change adds constraints support by also adding a helper script to
edit the constraints to remove oslo.messaging.

Change-Id: I8be883215f27abb58d15b85e8542cbdf32000bac

tools/tox_install.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# Client constraint file contains this client version pin that is in conflict
+# with installing the client from source. We should remove the version pin in
+# the constraints file before applying it for from-source installation.
+
+CONSTRAINTS_FILE=$1
+shift 1
+
+set -e
+
+# NOTE(tonyb): Place this in the tox enviroment's log dir so it will get
+# published to logs.openstack.org for easy debugging.
+localfile="$VIRTUAL_ENV/log/upper-constraints.txt"
+
+if [[ $CONSTRAINTS_FILE != http* ]]; then
+    CONSTRAINTS_FILE=file://$CONSTRAINTS_FILE
+fi
+# NOTE(tonyb): need to add curl to bindep.txt if the project supports bindep
+curl $CONSTRAINTS_FILE --insecure --progress-bar --output $localfile
+
+pip install -c$localfile openstack-requirements
+
+# This is the main purpose of the script: Allow local installation of
+# the current repo. It is listed in constraints file and thus any
+# install will be constrained and we need to unconstrain it.
+edit-constraints $localfile -- $CLIENT_NAME
+
+pip install -c$localfile -U $*
+exit $?

tox.ini

@@ -1,11 +1,17 @@
 [tox]
+minversion = 2.0
 envlist = py35,py34,py27,pep8,bandit
 
 [testenv]
 setenv =
     VIRTUAL_ENV={envdir}
     OS_TEST_TIMEOUT=30
+    BRANCH_NAME=master
+    CLIENT_NAME=oslo.messaging
 passenv = OS_*
+          ZUUL_CACHE_DIR
+          REQUIREMENTS_PIP_LOCATION
+install_command = {toxinidir}/tools/tox_install.sh {env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
 deps = -r{toxinidir}/test-requirements.txt
 commands = python setup.py testr --slowest --testr-args='{posargs}'
 
@@ -14,7 +20,6 @@ commands = flake8
 deps = hacking<0.11,>=0.10.0
 
 [testenv:cover]
-setenv = VIRTUAL_ENV={envdir}
 commands =
   python setup.py test --coverage --coverage-package-name=oslo_messaging --testr-args='{posargs}'
 
@@ -25,25 +30,34 @@ commands = {posargs}
 commands = python setup.py build_sphinx
 
 [testenv:py27-func-rabbit]
-setenv = TRANSPORT_DRIVER=rabbit
+setenv =
+    {[testenv]setenv}
+    TRANSPORT_DRIVER=rabbit
 commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py34-func-rabbit]
-setenv = TRANSPORT_DRIVER=rabbit
+setenv =
+    {[testenv]setenv}
+    TRANSPORT_DRIVER=rabbit
 basepython = python3.4
 commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py35-func-rabbit]
-setenv = TRANSPORT_DRIVER=rabbit
+setenv =
+    {[testenv]setenv}
+    TRANSPORT_DRIVER=rabbit
 basepython = python3.5
 commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py27-func-pika]
-setenv = TRANSPORT_DRIVER=pika
+setenv =
+    {[testenv]setenv}
+    TRANSPORT_DRIVER=pika
 commands = pifpaf run rabbitmq --  python setup.py testr --slowest --testr-args='{posargs:oslo_messaging.tests.functional}'
 
 [testenv:py27-func-amqp1]
 setenv =
+    {[testenv]setenv}
     TRANSPORT_URL=amqp://stackqpid:secretqpid@127.0.0.1:65123//
     AMQP1_BACKEND=qpidd
     ENVNAME={envname}
@@ -54,6 +68,7 @@ commands = {toxinidir}/setup-test-env-amqp1.sh python setup.py testr --slowest -
 [testenv:py34-func-amqp1]
 basepython = python3.4
 setenv =
+    {[testenv]setenv}
     TRANSPORT_URL=amqp://stackqpid:secretqpid@127.0.0.1:65123//
     AMQP1_BACKEND=qpidd
     ENVNAME={envname}
@@ -64,6 +79,7 @@ commands = {toxinidir}/setup-test-env-amqp1.sh python setup.py testr --slowest -
 [testenv:py35-func-amqp1]
 basepython = python3.5
 setenv =
+    {[testenv]setenv}
     TRANSPORT_URL=amqp://stackqpid:secretqpid@127.0.0.1:65123//
     AMQP1_BACKEND=qpidd
     ENVNAME={envname}