Introduction of a new device class (localhome).

- user-home is on local disk
- additional entry in dolphin: home@server
- display info about localhome on login-screen
- provide unison-config for sync home with home@server
- force user to be logged out immediately after first login, because
  home-dir must exists for bind-mounts on /lmn/media

roles/lmn_localhome/files/lmn-create-unisonconfig.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/bash
+#
+# create ~/.unison/SyncHome.prf if not exists
+#
+set -eu
+
+[[ -f ~/.unison/SyncHome.prf ]] && exit 0
+
+mkdir -p ~/.unison
+
+if id | grep teachers; then
+  NETHOME="$(find /srv/samba/schools/default-school/teachers/ -maxdepth 1 -type d -name "${USER}")"
+else
+  NETHOME="$(find /srv/samba/schools/default-school/students/ -maxdepth 2 -type d -name "${USER}")"
+fi
+
+if [[ ! -f ~/.unison/SyncHome.prf ]]; then
+  echo "# Unison preferences
+label = Sync Home on Server
+path = Bilder
+path = Dokumente
+path = Musik
+path = Videos
+root = $HOME
+root = $NETHOME
+dontchmod = true
+perms = 0" > ~/.unison/SyncHome.prf
+fi
+

roles/lmn_localhome/tasks/main.yml

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+---
+- name: enable pam_mkhomedir.so
+  lineinfile:
+    dest: /etc/pam.d/common-session
+    line: "session  optional        pam_mkhomedir.so  umask=0077"
+    insertbefore: "session  optional        pam_mount.so"
+
+- name: Patch sddm login screen to inform about localhome
+  blockinfile:
+    path: /usr/share/sddm/themes/debian-breeze/Main.qml
+    marker: // {mark} ANSIBLE MANAGED BLOCK localhome
+    insertbefore: '\s+//Footer'
+    block: |
+      Text {
+         id: localhome
+         anchors.top: parent.top
+         anchors.left: parent.left
+         anchors.topMargin: 10
+         anchors.leftMargin: 15
+         color: "#ffffff"
+         text: "Lokale Anmeldung!\nHome-Verzeichnis liegt nicht im Netz!"
+         font.pointSize: config.fontSize
+      }
+
+- name: Copy unison-createconfig scripts
+  ansible.builtin.copy:
+    src: lmn-create-unisonconfig.sh
+    dest: /usr/local/bin/
+    mode: 0755
+
+- name: Install auto-logout-script for first login in /etc/profile.d/
+  copy:
+    dest: /etc/profile.d/lmn-logout.sh
+    content: |
+      [[ "${UID}" -gt 10000 ]] && ! findmnt "/lmn/media/${USER}/home" > /dev/null && exit 0