Avoid problems on Ubuntu by using a newer version of pip

.travis.yml

@@ -20,15 +20,12 @@ script:
   # Run container in detached state.
   - 'docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:rw ${run_opts} geerlingguy/docker-${distro}-ansible:latest "${init}" > "${container_id}"'
 
+  # Avoid pip bug https://bugs.launchpad.net/ubuntu/+source/python-pip/+bug/1658844
+  - 'docker exec "$(cat ${container_id})" ansible-galaxy install tersmitten.pip'
+
   # Ansible syntax check.
   - 'docker exec --tty "$(cat ${container_id})" env TERM=xterm ansible-playbook /etc/ansible/roles/role_under_test/tests/test.yml --syntax-check'
 
-  # Fix pip - see https://bugs.launchpad.net/ubuntu/+source/python-pip/+bug/1658844
-  - 'docker exec "$(cat ${container_id})" apt-get update'
-  - 'docker exec "$(cat ${container_id})" apt-get install -y python-pip'
-  - 'docker exec "$(cat ${container_id})" python -m pip install -U pip'
-  - 'docker exec "$(cat ${container_id})" pip install -U pip setuptools'
-
   # Test role.
   - 'docker exec "$(cat ${container_id})" ansible-playbook /etc/ansible/roles/role_under_test/tests/test.yml'
 

meta/main.yml

@@ -16,4 +16,5 @@ galaxy_info:
   - web
   galaxy_tags:
     - letsencrypt
-dependencies: []
+dependencies:
+  - tersmitten.pip

tasks/client.yaml

@@ -1,13 +1,12 @@
 ---
 - name: Operating system dependencies
-  apt: name={{ item }} state=present
+  apt: name={{ item }} state=present update_cache=yes
   with_items:
     - build-essential
     - libssl-dev
     - libffi-dev
     - python-dev
     - git
-    - python-pip
     - python-virtualenv
     - dialog
     - libaugeas0