From a096eafb45c3aba23573ef3d8689d634c59da876 Mon Sep 17 00:00:00 2001
From: Horvath Gergely <horvathg@hekate>
Date: Mon, 17 Feb 2020 21:48:48 +0100
Subject: [PATCH] add possibility to install synapse on raspberry pi

---
 group_vars/matrix_servers                     | 16 ++++++++++++++++
 roles/matrix-base/defaults/main.yml           |  2 ++
 roles/matrix-base/tasks/sanity_check.yml      |  7 +++++++
 roles/matrix-base/tasks/server_base/setup.yml |  4 ++--
 roles/matrix-base/tasks/setup_matrix_base.yml |  2 ++
 .../tasks/synapse/setup_install.yml           | 19 +++++++++++++++++++
 6 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index 1c7ac23f..148382fa 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -678,3 +678,19 @@ matrix_synapse_systemd_wanted_services_list: |
 # /matrix-synapse
 #
 ######################################################################
+
+
+
+######################################################################
+#
+# raspberry pi
+#
+######################################################################
+
+matrix_raspberry_pi: "false"
+
+######################################################################
+#
+# /raspberry pi
+#
+######################################################################
diff --git a/roles/matrix-base/defaults/main.yml b/roles/matrix-base/defaults/main.yml
index b4fef1dd..b5897d0d 100644
--- a/roles/matrix-base/defaults/main.yml
+++ b/roles/matrix-base/defaults/main.yml
@@ -26,6 +26,8 @@ matrix_base_data_path: "/matrix"
 matrix_base_data_path_mode: "750"
 
 matrix_static_files_base_path: "{{ matrix_base_data_path }}/static-files"
+matrix_docker_src_files_path: "{{ matrix_base_data_path }}/docker-src"
+matrix_docker_synapse_src_files_path: "{{ matrix_docker_src_files_path }}/synapse"
 
 matrix_homeserver_url: "https://{{ matrix_server_fqn_matrix }}"
 
diff --git a/roles/matrix-base/tasks/sanity_check.yml b/roles/matrix-base/tasks/sanity_check.yml
index b2d8c249..a0a92a22 100644
--- a/roles/matrix-base/tasks/sanity_check.yml
+++ b/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"
diff --git a/roles/matrix-base/tasks/server_base/setup.yml b/roles/matrix-base/tasks/server_base/setup.yml
index 7cb716a9..bd52a0e7 100644
--- a/roles/matrix-base/tasks/server_base/setup.yml
+++ b/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:
diff --git a/roles/matrix-base/tasks/setup_matrix_base.yml b/roles/matrix-base/tasks/setup_matrix_base.yml
index b4aa92b9..952a37a5 100644
--- a/roles/matrix-base/tasks/setup_matrix_base.yml
+++ b/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.
diff --git a/roles/matrix-synapse/tasks/synapse/setup_install.yml b/roles/matrix-synapse/tasks/synapse/setup_install.yml
index 88fb0049..33f04a28 100644
--- a/roles/matrix-synapse/tasks/synapse/setup_install.yml
+++ b/roles/matrix-synapse/tasks/synapse/setup_install.yml
@@ -18,12 +18,31 @@
     group: "{{ matrix_user_username }}"
   when: "not local_path_media_store_stat.failed and not local_path_media_store_stat.stat.exists"
 
+- name: Ensure Synapse repository is present on Raspberry pi
+  git:
+    repo: https://github.com/matrix-org/synapse.git
+    dest: "{{ matrix_docker_synapse_src_files_path }}"
+    version: "{{ matrix_synapse_docker_image.split(':')[1] }}"
+    force: "yes"
+  when: "matrix_raspberry_pi"
+
+- name: Ensure Synapse Docker image is build (Raspberry pi)
+  docker_image:
+    name: "{{ matrix_synapse_docker_image }}"
+    source: build
+    build:
+      dockerfile: docker/Dockerfile
+      path: "{{ matrix_docker_synapse_src_files_path }}"
+      pull: yes
+  when: "matrix_raspberry_pi"
+
 - name: Ensure Synapse Docker image is pulled
   docker_image:
     name: "{{ matrix_synapse_docker_image }}"
     source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
     force_source: "{{ matrix_synapse_docker_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
     force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_synapse_docker_image_force_pull }}"
+  when: "not matrix_raspberry_pi"
 
 - name: Check if a Synapse signing key exists
   stat: