Use upper-constraints file in developer mode

This commit adds the following new variables:

horizon_requirements_git_repo
horizon_requirements_git_install_branch

When in developer mode, This repo is then cloned in horizon_install.yml
and used as an upper constraint in the functional test to avoid us
installing and running into issues resulting from uncapped dependencies
being installed.

This commit also changes the pip_install_options fact name in
horizon_install.yml to pip_install_options_fact.  This allows us to
maintain the existing pip_install_options variable without overwriting
it with options when in developer mode, which ultimately means we can
have multiple services running in a container use a combination of
*_developer_mode: true and *_developer_mode: false.  At the moment,
if a service writes pip_install_options fact with the constraints
options, those options will persist to other services running in the
container even if *_developer_mode: false.

Change-Id: If481de123073e46825cd5816062f08332d2d98fb

defaults/main.yml

@@ -20,6 +20,8 @@ verbose: True
 horizon_git_repo: https://git.openstack.org/openstack/horizon
 horizon_git_install_branch: master
 horizon_developer_mode: false
+horizon_requirements_git_repo: https://git.openstack.org/openstack/requirements
+horizon_requirements_git_install_branch: master
 horizon_developer_constraints:
   - "git+{{ horizon_git_repo }}@{{ horizon_git_install_branch }}#egg=horizon"
 

tasks/horizon_install.yml

@@ -43,15 +43,37 @@
     - horizon-install
     - horizon-pip-packages
 
-- name: Set constraint file fact for developer mode
-  set_fact:
-    pip_install_options: "{{ pip_install_options|default('') }} --constraint /opt/developer-pip-constraints.txt"
+- name: Clone requirements git repository
+  git:
+    repo: "{{ horizon_requirements_git_repo }}"
+    dest: "/opt/requirements"
+    clone: yes
+    update: yes
+    version: "{{ horizon_requirements_git_install_branch }}"
   when:
     - horizon_developer_mode | bool
   tags:
     - horizon-install
     - horizon-pip-packages
 
+- name: Add constraints to pip_install_options fact for developer mode
+  set_fact:
+    pip_install_options_fact: "{{ pip_install_options|default('') }} --constraint /opt/developer-pip-constraints.txt --constraint /opt/requirements/upper-constraints.txt"
+  when:
+    - horizon_developer_mode | bool
+  tags:
+    - horizon-install
+    - horizon-pip-packages
+
+- name: Set pip_install_options_fact when not in developer mode
+  set_fact:
+    pip_install_options_fact: "{{ pip_install_options|default('') }}"
+  when:
+    - not horizon_developer_mode | bool
+  tags:
+    - horizon-install
+    - horizon-pip-packages
+
 - name: Install apt packages
   apt:
     pkg: "{{ item }}"
@@ -69,7 +91,7 @@
   pip:
     name: "{{ item }}"
     state: present
-    extra_args: "{{ pip_install_options|default('') }}"
+    extra_args: "{{ pip_install_options_fact }}"
   register: install_packages
   until: install_packages|success
   retries: 5
@@ -186,7 +208,7 @@
     state: present
     virtualenv: "{{ horizon_venv_bin | dirname }}"
     virtualenv_site_packages: "no"
-    extra_args: "{{ pip_install_options|default('') }}"
+    extra_args: "{{ pip_install_options_fact }}"
   register: install_packages
   until: install_packages|success
   retries: 5
@@ -203,7 +225,7 @@
   pip:
     name: "{{ item }}"
     state: present
-    extra_args: "{{ pip_install_options|default('') }}"
+    extra_args: "{{ pip_install_options_fact }}"
   register: install_packages
   until: install_packages|success
   retries: 5

tests/test.yml

@@ -93,6 +93,7 @@
     keystone_venv_tag: "testing"
     keystone_developer_mode: true
     keystone_git_install_branch: a55128044f763f5cfe2fdc57c738eaca97636448
+    keystone_requirements_git_install_branch: 332278d456e06870150835564342570ec9d5f5a0
     keystone_auth_admin_token: "SuperSecreteTestToken"
     keystone_auth_admin_password: "SuperSecretePassword"
     keystone_service_password: "secrete"
@@ -116,6 +117,8 @@
     internal_lb_vip_address: 10.100.100.102
     horizon_developer_mode: true
     horizon_venv_tag: "testing"
+    horizon_git_install_branch: 18f1605bddd428a014d0e43ef52d1af6305e1e03
+    horizon_requirements_git_install_branch: 332278d456e06870150835564342570ec9d5f5a0
     horizon_galera_address: 10.100.100.101
     horizon_rabbitmq_password: "secrete"
     horizon_rabbitmq_userid: horizon