install golang from backport + install only if version changed

defaults/main.yml

@@ -41,6 +41,7 @@ base_ssh_known_hosts:
   - ''
 
 base_shouter: 'false' # set it to true to deploy xmpp shouter
+base_shouter_version: '0.7.0'
 
 base_journald_conf: 'true'
 base_journald_items:

tasks/shouter.yml

@@ -1,15 +1,25 @@
 ---
 
+- name: '[SHOUTER] - Check go-sendxmpp version'
+  shell: '/opt/go/bin/go-sendxmpp --version | grep xmpp | cut -d " " -f2'
+  register: version_installed
+  tags: shouter
+
 - name: '[SHOUTER] - Install golang'
   apt:
     name: "golang"
-    state: 'present'
+    state: latest
+    default_release: "{{ ansible_distribution_release }}-backports"
+    update_cache: yes
+  tags: shouter
 
 - name: '[SHOUTER] - Export gopath'
   lineinfile:
     path: /root/.profile
     line: 'export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin'
+  tags: shouter
 
 - name: '[SHOUTER] - Install go-sendxmpp'
   shell: 'export GOPATH=/opt/go; go install salsa.debian.org/mdosch/go-sendxmpp@latest'
-
+  when: base_shouter_version != version_installed.stdout
+  tags: shouter