feat: Implement GNOME autologin service

Containerfile

@@ -236,7 +236,14 @@ RUN rm /usr/share/applications/winetricks.desktop && \
     sed -i 's@enabled=1@enabled=0@g' /etc/yum.repos.d/_copr_kylegospo-wallpaper-engine-kde-plugin.repo && \
     sed -i 's@enabled=1@enabled=0@g' /etc/yum.repos.d/_copr_ycollet-audinux.repo && \
     mv /etc/sddm.conf /etc/sddm.conf.d/steamos.conf && \
-    systemctl enable plasma-autologin.service && \
+    if grep "gnome" <<< "${IMAGE_NAME}"; then \
+        systemctl disable gdm.service && \
+        systemctl enable sddm.service && \
+        systemctl enable gnome-autologin.service \
+    ; fi && \
+    if grep -v "gnome" <<< "${IMAGE_NAME}"; then \
+        systemctl enable plasma-autologin.service \
+    ; fi && \
     systemctl enable jupiter-fan-control.service && \
     systemctl enable vpower.service && \
     systemctl enable ds-inhibit.service && \

system_files/desktop/gnome/usr/bin/gnome-autologin

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+USER=$(id -nu 1000)
+
+# SteamOS SDDM config
+SDDM_CONF='/etc/sddm.conf.d/steamos.conf'
+if [ ! -f ${SDDM_CONF} ]; then
+    # Fallback to sddm.conf
+    SDDM_CONF = '/etc/sddm.conf'
+fi
+
+# Configure autologin
+sed -i 's/.*Session=.*/Session=gnome-session.desktop/g' ${SDDM_CONF}
+sed -i 's/.*User=.*/User='${USER}'/g' ${SDDM_CONF}

system_files/desktop/gnome/usr/lib/systemd/system/gnome-autologin.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Enables autologin to GNOME
+Before=display-manager.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/gnome-autologin
+
+[Install]
+WantedBy=multi-user.target