First cut at migrating openqa-stg to fedmsg-3

This includes some tweaks to the core fedmsg roles to allow a
'generic' way of indicating that a box should use fedmsg-hub-3
not fedmsg-hub, and make the restart notification work for that.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

roles/check-compose/tasks/main.yml

@@ -40,25 +40,58 @@
 #  tags:
 #  - packages
 
-- name: Install required packages
+- name: Install required packages (Python 2)
   dnf:
     name: ['python2-fedfind', 'python2-fedmsg-consumers', 'python2-openqa_client',
            'python2-setuptools', 'python2-six']
     state: present
+  when: "'python34-fedmsg' not in group_names"
   tags:
   - packages
 
+- name: Install required packages (Python 3)
+  dnf:
+    name: ['python2-pip', 'python3-fedfind', 'python3-fedmsg-consumers', 'python3-openqa_client',
+           'python3-setuptools', 'python3-six']
+    state: present
+  when: "'python34-fedmsg' in group_names"
+  tags:
+  - packages
+
+- name: Check if Python 2 check-compose is installed
+  find:
+    paths: /usr/lib/python2.7/site-packages
+    patterns: "check_compose*"
+    register: py2ccinstalled
+  changed_when: "1 != 1"
+  failed_when: "1 != 1"
+  check_mode: no
+
 - name: Check out check-compose
   git:
     repo: https://pagure.io/fedora-qa/check-compose.git
     dest: /root/check-compose
   register: gitcc
 
-- name: Install check-compose
-  command: "python setup.py install"
+- name: Install check-compose (Python 2)
+  command: "python2 setup.py install"
   args:
     chdir: /root/check-compose
-  when: "gitcc is changed"
+  when: "gitcc is changed and 'python34-fedmsg' not in group_names"
+  notify:
+  - restart fedmsg-hub
+
+- name: Remove check-compose (Python 2)
+  command: "pip2 --disable-pip-version-check uninstall check-compose"
+  when: "py2ccinstalled is defined and py2ccinstalled|length>0 and 'python34-fedmsg' in group_names"
+  notify:
+  - restart fedmsg-hub
+
+- name: Install check-compose (Python 3)
+  command: "python3 setup.py install"
+  args:
+    chdir: /root/check-compose
+  when: "(gitcc is changed or (py2ccinstalled is defined and py2ccinstalled|length>0)) and 'python34-fedmsg' in group_names"
   notify:
   - restart fedmsg-hub
 
@@ -69,6 +102,15 @@
   tags:
   - config
 
+- name: Remove Python 2 packages
+  dnf:
+    name: ['python2-fedfind', 'python2-fedmsg-consumers', 'python2-openqa_client',
+           'python2-setuptools', 'python2-six']
+    state: absent
+  when: "'python34-fedmsg' in group_names"
+  tags:
+  - packages
+
 - name: Install config file
   template: src=check-compose.conf.j2 dest=/etc/check-compose.conf mode=0644
   tags: