feat: add append flag to users

Merge branch 'append' of https://github.com/lazyfrosch/ansible-users into feature/append-flag

closes #17

README.md

@@ -50,6 +50,7 @@ Here is a list of all the default variables for this role, which are also availa
 #     group: staff
 #     password: xxxxx               (a hash created with: mkpasswd)
 #     groups: ["adm", "www-data"]
+#     append: no                    (only append groups, leave others)
 #     home_mode: "0750"
 #     home_create: yes
 #     home: /path/to/user/home
@@ -111,6 +112,7 @@ This is an example playbook:
       - username: foobar_groups
         groups:
           - users
+        append: yes
       - username: foobar_groups_reset
         groups: []
         group: foobar_groups_reset

tasks/manage.yml

@@ -22,6 +22,7 @@
     generate_ssh_key: "{{ item.ssh_key_generate | default(omit) }}"
     group: "{{ omit if item.group is defined and item.group == item.username else (item.group if item.group is defined else (users_group if users_group else omit)) }}"
     groups: "{{ item.groups|join(',') if item.groups is defined else users_groups|join(',')}}"
+    append: "{{ item.append | default(omit) }}"
     password: "{{ item.password | default(omit) }}"
     ssh_key_file: ".ssh/id_{{ item.ssh_key_type | default(users_ssh_key_type) }}"
     ssh_key_passphrase: "{{ item.ssh_key_password | default(omit) }}"

tests/main.yml

@@ -17,6 +17,7 @@
       - username: foobar_groups
         groups:
           - users
+        append: yes
       - username: foobar_groups_reset
         groups: []
         group: foobar_groups_reset