only install restic if not present

tasks/main.yml

@@ -1,10 +1,19 @@
+- name: "Try to update restic"
+  command: "restic self-update"
+  register: restic_update
+  ignore_errors: true
+
 - name: "Download restic"
   get_url:
     url: "{{ restic_url }}"
     dest: /tmp/restic.bz2
+  register: restic_download
+  when: restic_update is failed
 
 - name: "Extract restic"
   command: "bzip2 -df /tmp/restic.bz2"
+  register: restic_extract
+  when: restic_download is changed
 
 - name: "Install restic"
   copy:
@@ -12,6 +21,7 @@
     dest: "/usr/bin/restic"
     remote_src: yes
     mode: "751"
+  when: restic_extract is changed
 
 - name: "Create the restic config dir"
   file: