dotfiles-directory: Rework permission assertion

playbook.yml

@@ -136,17 +136,29 @@
           become: true
           become_user: root
 
-        - name: fix permissions for dotfiles directory
+        - name: fix group for dotfiles directory
           shell: |
-            chown --changes --recursive dotfiles:dotfiles .
-            chmod --changes --recursive g+rwX .
+            chgrp --changes --recursive dotfiles . | grep -v "changed group of './.git/index'"
+          args:
+            executable: /bin/bash
+            chdir: /var/lib/dotfiles
+          register: dotfiles_group_change
+          become: true
+          become_user: root
+          failed_when: dotfiles_group_change.rc not in (0, 1)
+          changed_when: dotfiles_group_change.rc == 0 # == lines selected, i.e. some output
+
+        - name: fix group permissions for dotfiles directory
+          shell: |
+            chmod --changes --recursive g+rwX . | grep -v "mode of './.git/index'"
           args:
             executable: /bin/bash
             chdir: /var/lib/dotfiles
           register: dotfiles_permission_change
           become: true
           become_user: root
-          changed_when: dotfiles_permission_change.stdout_lines|length > 0
+          failed_when: dotfiles_permission_change.rc not in (0, 1)
+          changed_when: dotfiles_permission_change.rc == 0 # == lines selected, i.e. some output
 
     - name: packages
       tags: