unionfs: use bash script to run mergerfs to avoid systemd line length…

… limitation with many remotes

roles/unionfs/defaults/main.yml

@@ -71,18 +71,6 @@ mergerfs_mount_start_command: |-
     -o dropcacheonclose=true,minfreespace=0,fsname=mergerfs \
     -o xattr={{ mergerfs_mount_xattr }},statfs=base,statfs_ignore=nc,umask={{ mergerfs_mount_umask }},noatime \
     -o func.readdir={{ mergerfs_mount_readdir_policy }} \
-  {% set branches = mergerfs_mount_branches.split(':') %}
-  {%- for branch in branches %}
-  {% if loop.index0 is divisibleby 10 and not loop.first %}
-  \
-  {% endif %}
-  {% if loop.first %}
-  {% filter indent(2, first=True) -%}
-  {%- if loop.first -%}"{%- endif -%}{{ branch }}{%- if not loop.last -%}:{%- endif %}
-  {%- endfilter %}
-  {% else %}
-  {{ branch}}{%- if not loop.last -%}:{%- endif %}
-  {% endif %}
-  {%- endfor %}" /mnt/unionfs
+    "{{ mergerfs_mount_branches }}" /mnt/unionfs
 
 mergerfs_mount_stop_command: /bin/fusermount3 -uz /mnt/unionfs

roles/unionfs/tasks/subtasks/mergerfs.yml

@@ -48,6 +48,21 @@
     mode: "0644"
     force: "{{ mergerfs_override_service }}"
 
+- name: "MergerFS | Create '/srv/scripts' directory"
+  ansible.builtin.file:
+    path: "/srv/scripts"
+    state: directory
+    owner: "{{ user.name }}"
+    group: "{{ user.name }}"
+    mode: "0775"
+
+- name: "MergerFS | Import 'mergerfs.sh'"
+  ansible.builtin.template:
+    src: mergerfs.sh.j2
+    dest: /srv/scripts/mergerfs.sh
+    mode: "0755"
+    force: "{{ mergerfs_override_service }}"
+
 - name: "MergerFS | Systemd reload daemon"
   ansible.builtin.systemd_service:
     daemon_reload: true

roles/unionfs/templates/mergerfs.service.j2

@@ -15,7 +15,7 @@ After={{ mergerfs_mount_service_after }}
 [Service]
 Type=forking
 GuessMainPID=no
-ExecStart={{ mergerfs_mount_start_command }}
+ExecStart=/srv/scripts/mergerfs.sh
 ExecStop={{ mergerfs_mount_stop_command }}
 
 [Install]

roles/unionfs/templates/mergerfs.sh.j2

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+{{ mergerfs_mount_start_command }}