Add support for desktop install [WIP]

Needs #3

functions/desktop.sh

@@ -0,0 +1,78 @@
+#!/bin/bash
+#
+# Copyright (c) Authors: http://www.armbian.com/authors, [email protected]
+#
+# This file is licensed under the terms of the GNU General Public
+# License version 2. This program is licensed "as is" without any
+# warranty of any kind, whether express or implied.
+#
+#  CPU related functions. See https://www.kernel.org/doc/Documentation/cpu-freq/user-guide.txt for more info.
+#
+
+# @description Return list of available desktops
+#
+# @example
+#   desktop::get_variants
+#   echo $?
+#   #Output
+#   0
+#
+# @exitcode 0  If successful.
+#
+# @stdout Space delimited string of virtual desktop packages.
+desktop::get_variants(){
+	printf '%s\n' "$(apt list 2>/dev/null | grep armbian | grep desktop | grep -v bsp | cut -d" " -f1 | cut -d"/" -f1)"
+}
+
+# @description Install desktop environment 
+#
+# @arg $1 string desktop [xfce,cinnamon,budgie,...]
+# @arg $2 string username
+
+desktop::set_de(){
+
+	# Check number of arguments
+	[[ $# -lt 1 ]] && printf "%s: Missing arguments\n" "${FUNCNAME[0]}" && return 2
+
+	# Read arguments and get os codename
+	local de="armbian-$(os::detect_linux_codename)-desktop-$1"
+        local username=$2
+
+	# Return desktops as array
+	declare -a desktops=( $(string::split "$(desktop::get_variants)" " ") )
+
+	# Validate parameter
+	array::contains "$de" ${desktops[@]}
+	[[ $? != 0 ]] && printf "%s: Invalid desktop\n" "${FUNCNAME[0]}" && return 3
+
+	# Install desktop
+	apt-get install --reinstall -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" --install-recommends $de lightdm lightdm-gtk-greeter
+
+	# in case previous install was interrupted
+	[[ $? -eq 130 ]] && dpkg --configure -a
+
+	# clean apt cache
+	apt clean
+
+	# add user to groups
+	for additionalgroup in sudo netdev audio video dialout plugdev input bluetooth systemd-journal ssh; do
+			usermod -aG ${additionalgroup} ${username} 2>/dev/null
+	done
+
+	# set up profile sync daemon on desktop systems
+	which psd >/dev/null 2>&1
+	if [[ $? -eq 0 && -z $(grep overlay-helper /etc/sudoers) ]]; then
+		echo "${username} ALL=(ALL) NOPASSWD: /usr/bin/psd-overlay-helper" >> /etc/sudoers
+		touch /home/${username}/.activate_psd
+	fi
+
+	# configure login manager
+	mkdir -p /etc/lightdm/lightdm.conf.d
+	echo "[Seat:*]" > /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf
+	echo "autologin-user=${username}" >> /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf
+	echo "autologin-user-timeout=0" >> /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf
+	echo "user-session=xfce" >> /etc/lightdm/lightdm.conf.d/22-armbian-autologin.conf
+	ln -s /lib/systemd/system/lightdm.service /etc/systemd/system/display-manager.service >/dev/null 2>&1
+	service lightdm start >/dev/null 2>&1
+
+}

share/menu/help/help

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+#!/bin/bash
+echo "test"

test/desktop_test.sh

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+#!/bin/bash
+#
+# Copyright (c) Authors: http://www.armbian.com/authors, [email protected]
+#
+# This file is licensed under the terms of the GNU General Public
+# License version 2. This program is licensed "as is" without any
+# warranty of any kind, whether express or implied.
+#
+#  CPU related tests.
+#
+
+cur_dir=$(pwd)
+# Source bash-utility and cpu functions (this will word under sudo)
+source "$cur_dir/../functions/bash-utility-master/src/string.sh"
+source "$cur_dir/../functions/bash-utility-master/src/collection.sh"
+source "$cur_dir/../functions/bash-utility-master/src/array.sh"
+source "$cur_dir/../functions/bash-utility-master/src/check.sh"
+source "$cur_dir/../functions/bash-utility-master/src/os.sh"
+source "$cur_dir/../functions/desktop.sh"
+
+# @description Print value from collection.
+#
+# @example
+#   collection::each "print_func"
+#   #Output
+#   Value in collection
+print_func(){
+   printf "%s\n" "$1"
+   return 0
+ }
+
+# @description Check function exit code and exit script if != 0.
+#
+# @example
+#   check_return
+#   #Output
+#  Nothing
+check_return(){
+	if [ "$?" -ne 0 ]; then
+		exit 1
+	fi
+ }
+
+# Get desktops
+#declare -i  variants=$(desktop::get_variants)
+#check_return
+#printf 'Desktop variants = %d\n' "$variants"
+#os::detect_linux_version
+declare -a desktops=( $(string::split "$(desktop::get_variants)" " ") )
+check_return
+printf "\nAll desktops\n"
+# Print all values in collection
+printf "%s\n" "${desktops[@]}" | collection::each "print_func"
+
+# Are we running as sudo?
+[[ "$EUID" != 0 ]] && printf "Must call desktop::set_de as sudo\n" && exit 1
+# Before
+printf "\nBefore\n"
+#cat /etc/default/cpufrequtils
+desktop::set_de "xfce"
+# After
+printf "\nAfter\n"
+#cat /etc/default/cpufrequtils