CI: Run some tests with the latest development versions of Docker SDK for Python, requests, and urllib3 (#902)

* Run some tests with the latest development versions of Docker SDK for Python, requests, and urllib3.

* Use LooseVersion instead of StrictVersion to parse urllib3 versions.

tests/integration/targets/setup_docker_python_deps/tasks/main.yml

@@ -13,3 +13,20 @@
     name: "{{ docker_pip_api_packages + (docker_pip_api_packages_python2 if ansible_facts.python.version.major == 2 else []) }}"
     extra_args: "-c {{ remote_constraints }}"
     state: present
+  when: not (force_docker_sdk_for_python_dev | default(false))
+
+- name: Make sure git is installed
+  package:
+    name:
+      - git
+    state: present
+  when: force_docker_sdk_for_python_dev | default(false)
+
+- name: Install/upgrade Python requirements from source repositories
+  pip:
+    name:
+      - git+https://github.com/psf/requests
+      - git+https://github.com/urllib3/urllib3
+    extra_args: "-c {{ remote_constraints }}"
+    state: latest
+  when: force_docker_sdk_for_python_dev | default(false)

tests/integration/targets/setup_docker_sdk_for_python/defaults/main.yml

@@ -8,3 +8,8 @@ docker_py_version: '0.0'
 docker_pip_extra_packages: []
 docker_pip_package: docker
 docker_pip_package_limit: ''
+
+docker_pip_git_packages:
+  - git+https://github.com/psf/requests
+  - git+https://github.com/urllib3/urllib3
+  - git+https://github.com/docker/docker-py

tests/integration/targets/setup_docker_sdk_for_python/tasks/main.yml

@@ -29,11 +29,28 @@
         docker_pip_package_limit: '<4.3.0'
       when: docker_api_version is version('1.39', '<')
 
+    - name: Make sure git is installed
+      package:
+        name:
+          - git
+      when: force_docker_sdk_for_python_dev | default(false)
+
     - name: Install/upgrade Python requirements
       pip:
-        name: "{{ [docker_pip_package ~ docker_pip_package_limit] + docker_pip_extra_packages }}"
+        name: >-
+          {{
+            docker_pip_git_packages
+            if (force_docker_sdk_for_python_dev | default(false)) else
+            ([docker_pip_package ~ docker_pip_package_limit] + docker_pip_extra_packages)
+          }}
         extra_args: "-c {{ remote_constraints }}"
-        state: "{{ 'latest' if force_docker_sdk_for_python_pypi | default(false) else 'present' }}"
+        state: >-
+          {{
+            'latest' if (
+              (force_docker_sdk_for_python_pypi | default(false)) or
+              (force_docker_sdk_for_python_dev | default(false))
+            ) else 'present'
+          }}
 
     - name: Check docker-py version
       command: "{{ ansible_python.executable }} -c 'import docker; print(docker.__version__)'"