add possibility to install synapse on raspberry pi

roles/matrix-base/tasks/sanity_check.yml

@@ -44,3 +44,10 @@
     - "{{ matrix_server_fqn_matrix }}"
     - "{{ matrix_server_fqn_riot }}"
   when: "item != item|lower"
+
+# ansible lower than 2.8, does not support docker_image build parameters
+# for Raspberry pi it is explicitly needed, so we rather fail here
+- name: Fail if running on Ansible lower than 2.8 and targeting Raspberry pi
+  fail:
+    msg: "To target Raspberry pi, you should usa ansible 2.8 or higher. E.g. pip contains such packages."
+  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_raspberry_pi"

roles/matrix-base/tasks/server_base/setup.yml

@@ -4,10 +4,10 @@
   when: ansible_distribution == 'CentOS'
 
 - include_tasks: "{{ role_path }}/tasks/server_base/setup_debian.yml"
-     when: (ansible_os_family == 'Debian') and (ansible_lsb.id != 'Raspbian') 
+  when: (ansible_os_family == 'Debian') and (ansible_lsb.id != 'Raspbian') 
 
 - include_tasks: "{{ role_path }}/tasks/server_base/setup_raspbian.yml"
-     when: (ansible_os_family == 'Debian') and (ansible_lsb.id == 'Raspbian') 
+  when: "matrix_raspberry_pi" 
 
 - name: Ensure Docker is started and autoruns
   service:

roles/matrix-base/tasks/setup_matrix_base.yml

@@ -22,6 +22,8 @@
     group: "{{ matrix_user_username }}"
   with_items:
     - "{{ matrix_base_data_path }}"
+    - "{{ matrix_docker_src_files_path }}"
+    - "{{ matrix_docker_synapse_src_files_path }}"
 
 # `docker_network` doesn't work as expected when the given network
 # is a substring of a network that already exists.