xserver-nodm: run via systemd user session

Signed-off-by: Daniel Díaz <[email protected]>

recipes-graphics/xserver-nodm-init/xserver-nodm-init/71-xserver-drm.rules

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+ACTION=="add", SUBSYSTEM=="drm", KERNEL=="card0", TAG+="systemd", ENV{SYSTEMD_WANTS}+="[email protected]"

recipes-graphics/xserver-nodm-init/xserver-nodm-init/xserver-nodm@.service

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+[Unit]
+Description=Xserver startup with a display manager (on tty7)
+RequiresMountsFor=/run
+Conflicts[email protected] plymouth-quit.service
+After=systemd-user-sessions.service [email protected] plymouth-quit-wait.service
+
+[Service]
+User=%i
+PermissionsStartOnly=true
+
+# Log us in via PAM so we get our XDG & co. environment and
+# are treated as logged in so we can use the tty:
+PAMName=login
+
+# Grab tty7
+UtmpIdentifier=tty7
+TTYPath=/dev/tty7
+TTYReset=yes
+TTYVHangup=yes
+TTYVTDisallocate=yes
+
+# stderr to journal so our logging doesn't get thrown into /dev/null
+StandardOutput=tty
+StandardInput=tty
+StandardError=journal
+
+EnvironmentFile=-/etc/default/xserver-nodm
+ExecStart=/etc/X11/Xserver vt7 $OPTARGS
+
+#[Install]
+#Alias=display-manager.service

recipes-graphics/xserver-nodm-init/xserver-nodm-init/xserver-system

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+ARGS="-logfile ${XDG_RUNTIME_DIR}/Xorg.log"

recipes-graphics/xserver-nodm-init/xserver-nodm-init_2.%.bbappend

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+SRC_URI += "file://[email protected] \
+            file://71-xserver-drm.rules \
+            file://xserver-system \
+"
+
+do_install_append() {
+    install -D -p -m0644 ${WORKDIR}/xserver-system \
+        ${D}${sysconfdir}/X11/xserver-system
+
+    # Remove upstream xserver-nodm.service
+    rm ${D}${systemd_unitdir}/system/xserver-nodm.service
+
+    # Install Xserver systemd service and accompanying udev rule
+    install -D -p -m0644 ${WORKDIR}/xserver-nodm@.service \
+        ${D}${systemd_unitdir}/system/xserver-nodm@.service
+    sed -i -e s:/etc:${sysconfdir}:g \
+           -e s:/usr/bin:${bindir}:g \
+           -e s:/var:${localstatedir}:g \
+              ${D}${systemd_unitdir}/system/xserver-nodm@.service
+    install -D -p -m0644 ${WORKDIR}/71-xserver-drm.rules \
+        ${D}${sysconfdir}/udev/rules.d/71-xserver-drm.rules
+}
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+FILES_${PN} += "${systemd_unitdir}/system/[email protected]"
+
+SYSTEMD_SERVICE_${PN} = "xserver-nodm@%i.service"
+SYSTEMD_AUTO_ENABLE = "disable"