Update role for new source build process

The variables horizon_developer_mode and horizon_venv_download
no longer carry any meaning. This review changes horizon to do
the equivalent of what developer_mode was all the time,
meaning that it always builds the venv and never requires
the repo server, but it will use a repo server when available.

As part of this, we move the source build out of its own file
because it's now a single task to include the venv build role.
This is just to make it easier to follow the code.

Change-Id: I8d6e97a690e087c6674e583ed2e6e7fcc754d920

defaults/main.yml

@@ -30,8 +30,7 @@ horizon_pip_package_state: "latest"
 # Set installation method.
 horizon_install_method: "source"
 
-## Toggle developer mode
-horizon_developer_mode: false
+horizon_upper_constraints_url: "{{ requirements_git_url | default('https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?h=' ~ requirements_git_install_branch | default('master')) }}"
 
 ## The git source/branch for Horizon
 horizon_git_repo: https://git.openstack.org/openstack/horizon
@@ -93,8 +92,8 @@ zun_dashboard_git_install_branch: master
 neutron_vpnaas_dashboard_git_repo: https://git.openstack.org/openstack/neutron-vpnaas-dashboard
 neutron_vpnaas_dashboard_git_install_branch: master
 
-## The packages to build from source (used in developer mode)
-horizon_developer_constraints:
+## The packages to build from source
+horizon_git_constraints:
   - "git+{{ horizon_git_repo }}@{{ horizon_git_install_branch }}#egg=horizon"
   - "git+{{ blazar_dashboard_git_repo }}@{{ blazar_dashboard_git_install_branch }}#egg=blazar-dashboard"
   - "git+{{ cloudkitty_dashboard_git_repo }}@{{ cloudkitty_dashboard_git_install_branch }}#egg=cloudkitty_dashboard"
@@ -109,27 +108,14 @@ horizon_developer_constraints:
   - "git+{{ watcher_dashboard_git_repo }}@{{ watcher_dashboard_git_install_branch }}#egg=watcher_dashboard"
   - "git+{{ zun_dashboard_git_repo }}@{{ zun_dashboard_git_install_branch }}#egg=zun_ui"
   - "git+{{ neutron_vpnaas_dashboard_git_repo }}@{{ neutron_vpnaas_dashboard_git_install_branch }}#egg=neutron_vpnaas_dashboard"
+  - --constraint {{ horizon_upper_constraints_url }}
 
-# TODO(odyssey4me):
-# This can be simplified once all the roles are using
-# python_venv_build. We can then switch to using a
-# set of constraints in pip.conf inside the venv,
-# perhaps prepared by giving a giving a list of
-# constraints to the role.
-horizon_pip_install_args: >-
-  {{ horizon_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
-  {{ (pip_install_upper_constraints is defined) | ternary('--constraint ' + pip_install_upper_constraints | default(''), '') }}
-  {{ pip_install_options | default('') }}
+horizon_pip_install_args: "{{ pip_install_options | default('') }}"
 
 # Name of the virtual env to deploy into
 horizon_venv_tag: "{{ venv_tag | default('untagged') }}"
 horizon_bin: "{{ _horizon_bin }}"
 
-# venv_download, even when true, will use the fallback method of building the
-# venv from scratch if the venv download fails.
-horizon_venv_download: "{{ not horizon_developer_mode | bool }}"
-horizon_venv_download_url: http://127.0.0.1/venvs/untagged/ubuntu/horizon.tgz
-
 ## System info
 horizon_system_user_name: horizon
 horizon_system_group_name: horizon

tasks/horizon_install_source.yml

@@ -37,31 +37,11 @@
     - { src: "/var/log/httpd", dest: "/var/log/apache2" }
   when: ansible_pkg_mgr in ['yum', 'dnf']
 
-# TODO(odyssey4me):
-# This can be simplified once all the roles are using
-# python_venv_build. We can then switch to using a
-# set of constraints in pip.conf inside the venv,
-# perhaps prepared by giving a giving a list of
-# constraints to the role.
-- name: Create developer mode constraint file
-  copy:
-    dest: "/opt/developer-pip-constraints.txt"
-    content: |
-      {% for item in horizon_developer_constraints %}
-      {{ item }}
-      {% endfor %}
-  when: horizon_developer_mode | bool
-
-- name: Ensure remote wheel building is disabled in developer mode
-  set_fact:
-    venv_build_host: "{{ inventory_hostname }}"
-  when:
-    - horizon_developer_mode | bool
-
 - name: Install the python venv
   include_role:
     name: "python_venv_build"
   vars:
+    venv_build_constraints: "{{ horizon_git_constraints }}"
     venv_build_distro_package_list: "{{ horizon_devel_distro_packages }}"
     venv_install_destination_path: "{{ horizon_bin | dirname }}"
     venv_pip_install_args: "{{ horizon_pip_install_args }}"