Install constrainted version of babel

Instead of using a hardcoded version of Babel, let's use the constrained
version. This is still 2.2.0 right now but once it changes, it changes
here as well. We can make this change now since Babel is tested as part
of the requirements repository.

When installing horizon, use the same branch as the project uses
and use constraints here.

Test babel changes in requirements now using a tox target. The job is
only run when upper-constraints or one of the test files is changed -
and only run for master and newton or newer.

Change-Id: I15fa6a706323615d6072d8acaa859fea9bf35883
Depends-On: Iab7844ba748ecd84ec07ad4280b2317bd626fe9a

jenkins/jobs/projects.yaml

@@ -7809,6 +7809,8 @@
           branch-override: master
       - 'gate-{name}-tox-{envlist}':
           envlist: validate
+      - 'gate-{name}-tox-{envlist}':
+          envlist: babel
       # This is a periodic job to ensure that our wheels are reasonably
       # up-to-date. Adding it to the requirements project seems to be the best
       # place to put it, though it's not strictly a requirement for

jenkins/scripts/common_translation_update.sh

@@ -25,6 +25,18 @@ QUIET="--quiet"
 # Have invalid files been found?
 INVALID_PO_FILE=0
 
+# Set up some branch dependent variables
+function init_branch {
+    local branch=$1
+
+    UPPER_CONSTRAINTS=https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt
+    if [[ "$branch" != "master" ]] ; then
+        UPPER_CONSTRAINTS="${UPPER_CONSTRAINTS}?h=$branch"
+    fi
+    GIT_BRANCH=$branch
+}
+
+
 # Get a module name of a project
 function get_modulename {
     local project=$1
@@ -45,8 +57,8 @@ function setup_venv {
     trap "rm -rf $VENV" EXIT
     virtualenv $VENV
 
-    # Babel version 2.3.0 to 2.3.2 are broken
-    $VENV/bin/pip install Babel==2.2.0
+    # Install babel using global upper constraints.
+    $VENV/bin/pip install 'Babel' -c $UPPER_CONSTRAINTS
 
     # Get version, run this twice - the first one will install pbr
     # and get extra output.
@@ -315,15 +327,11 @@ function install_horizon {
     # setup_venv for $VENV.
     trap "rm -rf $VENV $root" EXIT
 
-    git clone --depth=1 git://git.openstack.org/openstack/horizon.git $root/horizon
-    (cd ${root}/horizon && $VENV/bin/pip install .)
-
-    # Horizon has these as dependencies but let's be sure.
-    # TODO(amotoki): Pull required versions from g-r.
-
-    # TODO(jagerandi): Install Babel 2.2.0 for now since 2.3.2 does
-    # not extract all strings.
-    $VENV/bin/pip install Babel==2.2.0 django-babel
+    # Checkout same branch of horizon as the project - including
+    # same constraints.
+    git clone --depth=1 --branch $GIT_BRANCH \
+        git://git.openstack.org/openstack/horizon.git $root/horizon
+    (cd ${root}/horizon && $VENV/bin/pip install -c $UPPER_CONSTRAINTS .)
 }
 
 

jenkins/scripts/propose_translation_update.sh

@@ -20,6 +20,8 @@ ZANATA_VERSION=${BRANCH//\//-}
 
 source /usr/local/jenkins/slave_scripts/common_translation_update.sh
 
+init_branch $BRANCH
+
 # Propose updates for manuals
 function propose_manuals {
 

jenkins/scripts/upstream_translation_update.sh

@@ -20,6 +20,8 @@ ZANATA_VERSION=${ZUUL_REFNAME//\//-}
 
 source /usr/local/jenkins/slave_scripts/common_translation_update.sh
 
+init_branch $ZUUL_REFNAME
+
 if ! /usr/local/jenkins/slave_scripts/query-zanata-project-version.py \
     -p $PROJECT -v $ZANATA_VERSION; then
     # Exit successfully so that lack of a version doesn't cause the jenkins

zuul/layout.yaml

@@ -1260,6 +1260,13 @@ jobs:
   - name: gate-requirements-tox-validate
     branch: ^(?!stable/kilo).*$
 
+  - name: gate-requirements-tox-babel
+    branch: ^(?!stable/(?:kilo|liberty|mitaka)).*$
+    files:
+      - '^babel-test/.*'
+      - '^tox.ini'
+      - '^upper-constraints.txt'
+
   - name: gate-tempest-dsvm-full
     queue-name: integrated
 
@@ -10604,6 +10611,7 @@ projects:
       - gate-requirements-python27
       - gate-requirements-integration-dsvm
       - gate-requirements-integration-dsvm-resolver
+      - gate-requirements-tox-babel
       - gate-requirements-tox-validate
       - gate-grenade-dsvm-multinode
       # NOTE(mriedem): The multinode and partial-ncpu jobs should be mutually
@@ -10616,6 +10624,7 @@ projects:
       - gate-requirements-pep8
       - gate-requirements-python27
       - gate-requirements-integration-dsvm
+      - gate-requirements-tox-babel
       - gate-requirements-tox-validate
       - gate-grenade-dsvm-multinode
       - gate-grenade-dsvm-partial-ncpu