From f1231503c05864a5e34fc010f7745e5ace4396e4 Mon Sep 17 00:00:00 2001
From: thomas <kreitler@molgen.mpg.de>
Date: Wed, 22 Aug 2018 12:55:55 +0200
Subject: [PATCH 1/2] lightdm: low dependency login/display manger

Home page:

https://github.com/CanonicalLtd/lightdm

Build and base setup is taken from:

http://linuxfromscratch.org/blfs/view/svn/x/lightdm.html

Notes:

- lightdm must be installed to build greeters

- gdm now means GraphicalDisplayManger

- Final installation:

      install a greeter (slick-greeter)

      Tell the system to use lightdm instead of
      gdm after the next reboot

      #> systemctl disable gdm
      #> systemctl enable lightdm

- Test w/o reboot

      #> systemctl disable gdm --now
      #> systemctl enable lightdm --now

      Play with the config under /etc/lightdm or not

      Mind the usual commands

      #> systemctl restart lightdm
      #> systemctl daemon-reload
      #> systemctl restart systemd-logind
---
 lightdm.be0 | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100755 lightdm.be0

diff --git a/lightdm.be0 b/lightdm.be0
new file mode 100755
index 000000000..0d0184e2a
--- /dev/null
+++ b/lightdm.be0
@@ -0,0 +1,91 @@
+#!/usr/bin/env beesh
+
+# BEE_VERSION lightdm-1.26.0-0
+
+SRCURL[0]="https://github.com/CanonicalLtd/lightdm/releases/download/${PKGVERSION}/lightdm-${PKGVERSION}.tar.xz"
+
+# PATCHURL+=()
+
+# EXCLUDE+=()
+
+# build_in_sourcedir
+
+# mee_extract() {
+#    bee_extract "${@}"
+# }
+
+# mee_patch() {
+#    bee_patch "${@}"
+# }
+
+mee_configure() {
+  DMUSER=gdm
+  ITSTOOL=/bin/true                                 \
+  bee_configure                                     \
+    --prefix=/usr                                   \
+    --libexecdir=/usr/lib/lightdm                   \
+    --localstatedir=/var                            \
+    --sbindir=/usr/bin                              \
+    --sysconfdir=/etc                               \
+    --docdir=/usr/share/doc/lightdm-${PKGVERSION}   \
+    --disable-static                                \
+    --disable-tests                                 \
+    --enable-liblightdm-qt=no                       \
+    --with-greeter-user=${DMUSER}                   \
+    --with-greeter-session=slick-greeter
+}
+
+# mee_build() {
+#    bee_build
+# }
+
+# mee_install() {
+#    bee_install
+# }
+## by default this may be 'make install DESTDIR="${D}"'
+
+mee_install_post() {
+
+  sed '/bin\/sh/ a \\n. /etc/profile' ${S}/tests/src/lightdm-session > ${D}/usr/bin/lightdm-session
+  chmod 755 ${D}/usr/bin/lightdm-session
+  rm -rf ${D}/etc/init
+  install -v -dm755 -o gdm -g gdm ${D}/var/lib/lightdm
+  install -v -dm755 -o gdm -g gdm ${D}/var/lib/lightdm-data
+  install -v -dm755 -o gdm -g gdm ${D}/var/cache/lightdm
+  install -v -dm770 -o gdm -g gdm ${D}/var/log/lightdm
+
+  ###############################################
+  # adjust settings in /etc/lightdm/lightdm.conf
+
+  sed -i -e '/^#greeter-hide-users=false/ c greeter-hide-users=true' \
+         -e '/^#sessions-directory/ c sessions-directory=/usr/share/xsessions' \
+         -e '/^#greeter-session/ c greeter-session=slick-greeter' \
+         ${D}/etc/lightdm/lightdm.conf
+
+  sed -i -e '/^minimum-uid=/ c minimum-uid=100' \
+         -e '/^hidden-users=/ c hidden-users=nobody nobodyV' \
+         ${D}/etc/lightdm/users.conf
+
+
+  ######################
+  # create systemd unit
+
+  mkdir -p ${D}/etc/systemd/system
+  cat <<-UNIT > ${D}/etc/systemd/system/lightdm.service
+	[Unit]
+	Description=LightDM
+	Wants=nvidia.service
+	After=nvidia.service
+
+	[Service]
+	ExecStart=/usr/bin/lightdm
+	StandardOutput=syslog
+	Restart=always
+
+	[Install]
+	WantedBy=graphical.target
+	UNIT
+
+  chmod 644 ${D}/etc/systemd/system/lightdm.service
+
+}

From 31e93b46be4514ba2dcfb7b6b23abcbf1f7bcb6d Mon Sep 17 00:00:00 2001
From: thomas <kreitler@molgen.mpg.de>
Date: Tue, 11 Dec 2018 16:38:01 +0100
Subject: [PATCH 2/2] lightdm: Use lightdm based on tag in hostconfig

Lightdm is enabled per host by providing the 'lightdm' tag in our
hostconfig.

Installation steps on distmaster:

 - install updated gdm.service (see mariux64/mxtools)
 - bee install lightdm-1.26.0-0.x86_64 (surprise:)
 - systemctl enable lightdm

Conditions and installation tested on sigstkflt, sigill & sigint.
---
 lightdm.be0 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lightdm.be0 b/lightdm.be0
index 0d0184e2a..7a63270bc 100755
--- a/lightdm.be0
+++ b/lightdm.be0
@@ -76,6 +76,7 @@ mee_install_post() {
 	Description=LightDM
 	Wants=nvidia.service
 	After=nvidia.service
+	ConditionPathExists=/node/tags/lightdm
 
 	[Service]
 	ExecStart=/usr/bin/lightdm