Added support for installing python-tempestconf from git

In CI jobs, currently python-tempestconf is getting from pip,
which makes it hard to test dependent changes of the project.
By adding this support, one can test the python-tempestconf
changes in the review itself.

Setting tempest_developer_mode to true will exercise the same.

Change-Id: I7744270e7371260dcc4db146736710fb050f3502

defaults/main.yml

@@ -275,6 +275,14 @@ tempest_tempest_conf_overrides: {}
 # tempest.conf from the template
 tempest_use_tempestconf: false
 tempest_tempestconf_venv_bin: "/openstack/venvs/tempestconf/bin"
+
+# We comment out `tempest_tempestconf_git_repo` so that the repo_build role does not attempt to
+# build the wheel from this repo/branch. Instead, we want python-tempestconf to get built
+# from the stable release defined in global requirements.
+# tempest_tempestconf_git_repo: https://git.openstack.org/openstack/python-tempestconf
+tempest_tempestconf_git_install_branch: master
+tempest_tempestconf_developer_constraints:
+  - "git+{{ tempest_tempestconf_git_repo }}@{{ tempest_tempestconf_git_install_branch }}#egg=python_tempestconf"
 tempest_tempestconf_pip_packages:
   - python-tempestconf
 tempest_tempestconf_extra_cli_call_overrides:

tasks/tempestconf.yml

@@ -13,12 +13,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+- name: Create developer mode constraint file for python-tempestconf
+  copy:
+    dest: "/opt/developer-pip-constraints.txt"
+    content: |
+      {% for item in tempest_tempestconf_developer_constraints %}
+      {{ item }}
+      {% endfor %}
+  when: tempest_developer_mode | bool
+
 - name: Install python-tempestconf on venv
   include_role:
     name: "python_venv_build"
   vars:
     venv_install_destination_path: "{{ tempest_tempestconf_venv_bin | dirname }}"
-    venv_pip_install_args: "--isolated"
+    venv_pip_install_args: "{{ tempest_pip_install_args }}"
     venv_pip_packages: "{{ tempest_tempestconf_pip_packages }}"
   when: tempest_install_method == 'source'
 

tests/os_tempest-overrides.yml

@@ -16,6 +16,9 @@
 # Ensure that tempest executes tests
 tempest_run: yes
 
+# tempestconf specific settings
+tempest_tempestconf_git_repo: https://git.openstack.org/openstack/python-tempestconf
+
 # A sample plugin to activate the code path
 tempest_plugins:
   - name: sahara-tests