Add borg backup role

roles/borg_server/tasks/borgbackup_install.yml

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+---
+- name: borgbackup - download borg binary
+  get_url:
+    url: "{{ borgbackup_binary_uri }}"
+    dest: "{{ borgbackup_binary }}-{{ borgbackup_binary_version }}"
+    mode: "755"
+  when: not borgbackup_install_from_repo
+
+- name: borgbackup - link install
+  file:
+    src: "{{ borgbackup_binary }}-{{ borgbackup_binary_version }}"
+    dest: "{{ borgbackup_binary }}"
+    state: link
+    force: yes
+  when: not borgbackup_install_from_repo
+
+- name: borgbackup - install borgbackup
+  package:
+    name: borg
+    state: latest
+  when: borgbackup_install_from_repo

roles/borg_server/tasks/borgbackup_server.yml

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+---
+- name: borg_server - create group
+  group:
+    name: "{{ borgbackup_server_group }}"
+    state: present
+
+- name: borg_server - create user
+  user:
+    name: "{{ borgbackup_server_user }}"
+    group: "{{ borgbackup_server_group }}"
+    groups:
+    home: "{{ borgbackup_server_home }}"
+    createhome: yes
+    shell: /bin/bash
+    state: present
+
+- name: borg_server - manage permissions
+  file:
+    path: "{{ item }}"
+    owner: "{{ borgbackup_server_user }}"
+    group: "{{ borgbackup_server_group }}"
+    mode: 0700
+    state: directory
+  with_items:
+    - "{{ borgbackup_server_home }}"
+    - "{{ borgbackup_server_home }}/.ssh"
+    - "{{ borgbackup_server_pool }}"
+
+- name : borg_server - create authorized_keys
+  stat:
+    path: "{{ borgbackup_server_home }}/.ssh/authorized_keys"
+  register: authorized_keys
+
+- name: borg_server - manage permissions for authorized_keys
+  file:
+    path: "{{ borgbackup_server_home }}/.ssh/authorized_keys"
+    owner: "{{ borgbackup_server_user }}"
+    group: "{{ borgbackup_server_group }}"
+    mode: 0600
+    state: '{{ "file" if  authorized_keys.stat.exists else "touch" }}'

roles/borg_server/tasks/main.yml

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+---
+- import_tasks: borgbackup_install.yml
+  tags: [ borg ]
+
+- import_tasks: borgbackup_server.yml
+  tags: [ borg ]