Fixes #43: Fix confusing use of supervisor_version.

Author: geerlingguy

README.md

@@ -12,9 +12,9 @@ Python `pip` should be installed. If it is not already installed, you can use th
 
 Available variables are listed below, along with default values (see `defaults/main.yml`):
 
-    supervisor_version: latest
+    supervisor_version: ''
 
-Install a specific version of Supervisor by setting it here. See [available Supervisor versions](https://pypi.python.org/pypi/supervisor) on Pypi. `latest` installs the latest stable release.
+Install a specific version of Supervisor by setting it here. See [available Supervisor versions](https://pypi.python.org/pypi/supervisor) on Pypi. If no version is set, it will install the latest stable version of Supervisor when the role is run.
 
     supervisor_started: true
     supervisor_enabled: true

defaults/main.yml

@@ -1,6 +1,6 @@
 ---
 # Install a specific version of Supervisor by setting it here (e.g. '3.3.1').
-supervisor_version: latest
+supervisor_version: ''
 
 # Choose whether to use an init script or systemd unit configuration to start
 # Supervisor when it's installed and/or after a system boot.

tasks/main.yml

@@ -2,18 +2,11 @@
 - name: Include OS-specific variables.
   include_vars: "{{ ansible_os_family }}.yml"
 
-- name: Ensure Supervisor is installed (specific version).
+- name: Ensure Supervisor is installed.
   pip:
     name: supervisor
     state: present
-    version: "{{ supervisor_version }}"
-  when: supervisor_version != 'latest'
-
-- name: Ensure Supervisor is installed (latest version).
-  pip:
-    name: supervisor
-    state: present
-  when: supervisor_version == 'latest'
+    version: "{{ supervisor_version | default(omit) }}"
 
 - name: Ensure Supervisor log dir exists.
   file: