Allow to use specific version of git managed pipeline (NETWAYS#98)

* Allow to use specific version of git managed pipeline

fixes NETWAYS#97

Author: widhalmt

docs/pipelines.md

@@ -24,6 +24,8 @@ logstash_pipelines:
     output: syslog_out
 ```
 
+You can add a `version` attribute to your pipeline. It defaults to `main`. You can use every string, [Ansibles git](https://docs.ansible.com/ansible/latest/collections/ansible/builtin/git_module.html) module accepts.
+
 ## Custom pipelines ##
 
 If you have other ways of putting pipeline code into the correct directories, you can just skip the `source` option.

molecule/run_logstash/converge.yml

@@ -16,6 +16,7 @@
       syslog:
         name: syslog
         source: https://github.com/widhalmt/syslog-logstash-pipeline.git
+        version: master
         input: syslog
         output: syslog
     logstash_connector_pipelines:

tasks/main.yml

@@ -71,7 +71,7 @@
       git:
         repo: "{{ logstash_pipelines[item].source }}"
         dest: "/etc/logstash/conf.d/{{ logstash_pipelines[item].name }}"
-        version: master
+        version: "{{ logstash_pipelines[item].version |default('main') }}"
       with_items: "{{ logstash_pipelines }}"
       when: logstash_pipelines[item].source is defined
       notify: