#!/bin/sh
# ZachIR's LARBS Equivalent Setup Script (ZIRLESS)
# modified by Zach Smith <zachir@librem.one>
# LARBS by Luke Smith <luke@lukesmith.xyz>
# License: GNU GPLv3

### OPTIONS AND VARIABLES ###

while getopts ":a:r:b:p:s:h" o; do case "${o}" in
	h) printf "Optional arguments for custom use:\\n  -r: Dotfiles repository (local file or url)\\n  -p: Dependencies and programs csv (local file or url)\\n  -a: AUR helper (must have pacman-like syntax)\\n  -h: Show this message\\n" && exit 1 ;;
	r) dotfilesrepo=${OPTARG} && git ls-remote "$dotfilesrepo" || exit 1 ;;
	b) repobranch=${OPTARG} ;;
	p) progsfile=${OPTARG} ;;
	a) aurhelper=${OPTARG} ;;
        s) rootcmd=${OPTARG} ;;
	*) printf "Invalid option: -%s\\n" "$OPTARG" && exit 1 ;;
esac done

[ -z "$dotfilesrepo" ] && dotfilesrepo="https://gitlab.com/zachir/dotfiles.git"
[ -z "$progsfile" ] && progsfile="progs.csv"
[ -z "$aurhelper" ] && aurhelper="yay"
[ -z "$repobranch" ] && repobranch="master"
[ -z "$rootcmd" ] && rootcmd="sudo"

### FUNCTIONS ###

installpkg(){ pacman --noconfirm --needed -S "$1" >/dev/null 2>&1 ;}

error() { printf "%s\n" "$1" >&2; exit 1; }

welcomemsg() { \
	dialog --title "Welcome!" --msgbox "Welcome to ZachIR's LARBS Equivalent Setup Script!\\n\\nThis script will automatically install a fully-featured Linux desktop, which I use as my main machine.\\n\\n-Zach" 10 60

	dialog --colors --title "Important Note!" --yes-label "All ready!" --no-label "Return..." --yesno "Be sure the computer you are using has current pacman updates and refreshed Arch keyrings.\\n\\nIf it does not, the installation of some programs might fail." 8 70
	}

getuserandpass() { \
	# Prompts user for new username an password.
	name=$(dialog --inputbox "First, please enter a name for the user account." 10 60 3>&1 1>&2 2>&3 3>&1) || exit 1
	while ! echo "$name" | grep -q "^[a-z_][a-z0-9_-]*$"; do
		name=$(dialog --no-cancel --inputbox "Username not valid. Give a username beginning with a letter, with only lowercase letters, - or _." 10 60 3>&1 1>&2 2>&3 3>&1)
	done
	pass1=$(dialog --no-cancel --passwordbox "Enter a password for that user." 10 60 3>&1 1>&2 2>&3 3>&1)
	pass2=$(dialog --no-cancel --passwordbox "Retype password." 10 60 3>&1 1>&2 2>&3 3>&1)
	while ! [ "$pass1" = "$pass2" ]; do
		unset pass2
		pass1=$(dialog --no-cancel --passwordbox "Passwords do not match.\\n\\nEnter password again." 10 60 3>&1 1>&2 2>&3 3>&1)
		pass2=$(dialog --no-cancel --passwordbox "Retype password." 10 60 3>&1 1>&2 2>&3 3>&1)
	done ;}

usercheck() { \
	! { id -u "$name" >/dev/null 2>&1; } ||
	dialog --colors --title "WARNING!" --yes-label "CONTINUE" --no-label "No wait..." --yesno "The user \`$name\` already exists on this system. ZIRLESS can install for a user already existing, but it will \\Zboverwrite\\Zn any conflicting settings/dotfiles on the user account.\\n\\nZIRLESS will \\Zbnot\\Zn overwrite your user files, documents, videos, etc., so don't worry about that, but only click <CONTINUE> if you don't mind your settings being overwritten.\\n\\nNote also that ZIRLESS will change $name's password to the one you just gave." 14 70
	}

preinstallmsg() { \
	dialog --title "Let's get this party started!" --yes-label "Let's go!" --no-label "No, nevermind!" --yesno "The rest of the installation will now be totally automated, so you can sit back and relax.\\n\\nIt will take some time, but when done, you can relax even more with your complete system.\\n\\nNow just press <Let's go!> and the system will begin installation!" 13 60 || { clear; exit 1; }
	}

adduserandpass() { \
	# Adds user `$name` with password $pass1.
	dialog --infobox "Adding user \"$name\"..." 4 50
	useradd -m -s /bin/zsh "$name" >/dev/null 2>&1
	usermod -a -G wheel "$name" && mkdir -p /home/"$name" && chown "$name:$name" /home/"$name"
	repodir="/home/$name/.local/src"; mkdir -p "$repodir"; chown -R "$name:$name" "$(dirname "$repodir")"
	echo "$name:$pass1" | chpasswd
	unset pass1 pass2 ;}

refreshkeys() { \
#	dialog --infobox "Refreshing Arch Keyring..." 4 40
#	pacman -Q artix-keyring >/dev/null 2>&1 && pacman --noconfirm -S artix-keyring artix-archlinux-support >/dev/null 2>&1
#	pacman --noconfirm -S archlinux-keyring >/dev/null 2>&1
        pacman-key --refresh-keys
	}

newperms() { # Set special sudoers settings for install (or after).
        if [ "$rootcmd" = "sudo" ]; then
                if [ "$1" = "allnopass" ]; then
	                sed -i "/#ZIRLESS/d" /etc/sudoers
	                echo "%wheel ALL=(ALL) NOPASSWD: ALL #ZIRLESS" >> /etc/sudoers
                elif [ "$1" = "newpass" ]; then
                        sed -i "/#ZIRLESS/d" /etc/sudoers
                        echo "%wheel ALL=(ALL) ALL #ZIRLESS
%wheel ALL=(ALL) NOPASSWD: /usr/bin/shutdown,/usr/bin/reboot,/usr/bin/mount,/usr/bin/umount,/usr/bin/pacman -Syu,/usr/bin/pacman -Syyu,/usr/bin/systemctl,/usr/bin/rc-service,/usr/bin/rc-update,/usr/bin/rsm,/usr/bin/sv,/usr/bin/s6-rc,/usr/bin/s6-rc-bundle-update,/usr/bin/pacman -Syyu --noconfirm,/usr/bin/loadkeys,/usr/bin/pacman -Syyuw --noconfirm #ZIRLESS" >> /etc/sudoers
                fi
        elif [ "$rootcmd" = "doas" ]; then
                if [ "$1" = "allnopass" ]; then
                        sed -i "/#ZIRLESS/d" /etc/doas.conf
                        echo "permit :wheel nopass #ZIRLESS" >> /etc/doas.conf
                elif [ "$1" = "newpass" ]; then
                        sed -i "/#ZIRLESS/d" /etc/doas.conf
                        echo "permit :wheel persist #ZIRLESS
permit :wheel nopass cmd shutdown #ZIRLESS
permit :wheel nopass cmd reboot #ZIRLESS
permit :wheel nopass cmd mount #ZIRLESS
permit :wheel nopass cmd umount #ZIRLESS
permit :wheel nopass cmd pacman args -Syu #ZIRLESS
permit :wheel nopass cmd pacman args -Syu --noconfirm #ZIRLESS
permit :wheel nopass cmd pacman args -Syyu --noconfirm #ZIRLESS
permit :wheel nopass cmd pacman args -Syyu #ZIRLESS
permit :wheel nopass cmd pacman args -Syyuw #ZIRLESS
permit :wheel nopass cmd rsm #ZIRLESS
permit :wheel nopass cmd sv #ZIRLESS
permit :wheel nopass cmd systemctl #ZIRLESS
permit :wheel nopass cmd rc-service #ZIRLESS
permit :wheel nopass cmd rc-update #ZIRLESS
permit :wheel nopass cmd s6-rc #ZIRLESS
permit :wheel nopass cmd s6-rc-bundle-update #ZIRLESS
permit :wheel nopass cmd loadkeys #ZIRLESS" >> /etc/doas.conf
                fi
        fi ;}

artixaddlib32repo() { # Enables the lib32 Artix repo
	dialog --infobox "Adding lib32 repo to Artix..." 4 50
        sed -E "s/^#(\[lib32\])/\\1/;/^#Include/d;/#[.*-gremlins]/d;/\[lib32\]/a Include = /etc/pacman.d/mirrorlist" -i /etc/pacman.conf
        pacman -Syy ;}

artixadduniverserepo() { # Enables the universe repo (necessary to add Arch repos)
	dialog --infobox "Adding universe repo to Artix..." 4 50
        echo 'Server = https://universe.artixlinux.org/$arch
Server = https://mirror1.artixlinux.org/universe/$arch
Server = https://mirror.pascalpuffke.de/artix-universe/$arch
Server = https://artixlinux.qontinuum.space/artixlinux/universe/os/$arch
Server = https://mirror1.cl.netactuate.com/artix/universe/$arch
Server = https://ftp.crifo.org/artix-universe/' >> /etc/pacman.d/mirrorlist-universe
        echo '
[universe]
Include = /etc/pacman.d/mirrorlist-universe
' >> /etc/pacman.conf
        pacman -Syy ;}

artixaddarchrepos() { # Adds the Arch repos to Artix Linux (some ZIRLESS packages require it)
	dialog --infobox "Adding arch repos to Artix..." 4 50
        pacman -S --noconfirm artix-archlinux-support archlinux-mirrorlist archlinux-keyring >/dev/null 2>&1 || exit 3
        echo "
[extra]
Include = /etc/pacman.d/mirrorlist-arch

[community]
Include = /etc/pacman.d/mirrorlist-arch

[multilib]
Include = /etc/pacman.d/mirrorlist-arch
" >> /etc/pacman.conf
        pacman -Syy ;}

manualinstall() { # Installs $1 manually if not installed. Used only for AUR helper here.
	[ -f "/usr/bin/$1" ] || (
	dialog --infobox "Installing \"$1\", an AUR helper..." 4 50
	cd /tmp || exit 1
	rm -rf /tmp/"$1"*
	curl -sO https://aur.archlinux.org/cgit/aur.git/snapshot/"$1".tar.gz &&
	$rootcmd -u "$name" tar -xvf "$1".tar.gz >/dev/null 2>&1 &&
	cd "$1" &&
	$rootcmd -u "$name" makepkg --noconfirm -si >/dev/null 2>&1 || return 1
	cd /tmp || return 1) ;}

maininstall() { # Installs all needed programs from main repo.
	dialog --title "ZIRLESS Installation" --infobox "Installing \`$1\` ($n of $total). $1 $2" 5 70
	installpkg "$1"
	}

gitmakeinstall() {
	progname="$(basename "$1" .git)"
	dir="$repodir/$progname"
	dialog --title "ZIRLESS Installation" --infobox "Installing \`$progname\` ($n of $total) via \`git\` and \`make\`. $(basename "$1") $2" 5 70
	$rootcmd -u "$name" git clone --depth 1 "$1" "$dir" >/dev/null 2>&1 || { cd "$dir" || return 1 ; $rootcmd -u "$name" git pull --force origin master;}
	cd "$dir" || exit 1
	$rootcmd -u "$name" make >/dev/null 2>&1
	make install >/dev/null 2>&1
	cd /tmp || return 1 ;}

gitmakepkginstall() {
        pkgname="$(basename "$1" .git)"
        dir="$repodir/$progname"
        dialog --title "ZIRLESS Installation" --infobox "Installing \`$progname\` ($n of $total) via \`git\` and \`makepkg\`. $(basename "$1") $2" 5 70
        $rootcmd -u "$name" git clone --depth 1 "$1" "$dir" >/dev/null 2>&1 || { cd "$dir" || return 1 ; $rootcmd -u "$name" git pull --force origin master;}
        cd "$dir" || exit 1
        $rootcmd -u "$name" makepkg -sc
        pacman -U *.pkg.tar.*
        cd /tmp || return 1 ;}

aurinstall() { \
	dialog --title "ZIRLESS Installation" --infobox "Installing \`$1\` ($n of $total) from the AUR. $1 $2" 5 70
	echo "$aurinstalled" | grep -q "^$1$" && return 1
	$rootcmd -u "$name" $aurhelper -S --noconfirm "$1" >/dev/null 2>&1
	}

installationloop() { \
	([ -f "$progsfile" ] && cp "$progsfile" /tmp/progs.csv) || curl -Ls "$progsfile" | sed '/^#/d' > /tmp/progs.csv
	total=$(wc -l < /tmp/progs.csv)
	aurinstalled=$(pacman -Qqm)
	while IFS=, read -r tag program comment; do
		n=$((n+1))
		echo "$comment" | grep -q "^\".*\"$" && comment="$(echo "$comment" | sed "s/\(^\"\|\"$\)//g")"
		case "$tag" in
			"A") aurinstall "$program" "$comment" ;;
			"G") gitmakeinstall "$program" "$comment" ;;
                        "M") gitmakepkginstall "$program" "$comment" ;;
			*) maininstall "$program" "$comment" ;;
		esac
	done < /tmp/progs.csv ;}

putgitrepo() { # Downloads a gitrepo $1 and places the files in $2 only overwriting conflicts
	dialog --infobox "Downloading and installing config files..." 4 60
	[ -z "$3" ] && branch="master" || branch="$repobranch"
	dir=$(mktemp -d)
	[ ! -d "$2" ] && mkdir -p "$2"
	chown "$name":"$name" "$dir" "$2"
	sudo -u "$name" git clone --recursive -b "$branch" --depth 1 --recurse-submodules "$1" "$dir" >/dev/null 2>&1
	sudo -u "$name" cp -rfT "$dir" "$2"
        pushd "$2"
        sudo -u "$name" make install
        popd
	}

systembeepoff() { dialog --infobox "Getting rid of that retarded error beep sound..." 10 50
	rmmod pcspkr
	echo "blacklist pcspkr" > /etc/modprobe.d/nobeep.conf ;}

finalize(){ \
	dialog --infobox "Preparing welcome message..." 4 50
	dialog --title "All done!" --msgbox "Congrats! Provided there were no hidden errors, the script completed successfully and all the programs and configuration files should be in place.\\n\\nTo run the new graphical environment, log out and log back in as your new user, then run the command \"startx\" to start the graphical environment (it will start automatically in tty1).\\n\\n.t Luke" 12 80
	}

### THE ACTUAL SCRIPT ###

### This is how everything happens in an intuitive format and order.

# Check if user is root on Arch distro. Install dialog.
pacman --noconfirm --needed -Sy dialog || error "Are you sure you're running this as the root user, are on an Arch-based distribution and have an internet connection?"

# Welcome user and pick dotfiles.
welcomemsg || error "User exited."

# Get and verify username and password.
getuserandpass || error "User exited."

# Give warning if user already exists.
usercheck || error "User exited."

# Last chance for user to back out before install.
preinstallmsg || error "User exited."

### The rest of the script requires no user input.

# Refresh Arch keyrings.
refreshkeys || error "Error automatically refreshing Arch keyring. Consider doing so manually."

for x in curl base-devel git ntp zsh; do
	dialog --title "ZIRLESS Installation" --infobox "Installing \`$x\` which is required to install and configure other programs." 5 70
	installpkg "$x"
done

dialog --title "ZIRLESS Installation" --infobox "Synchronizing system time to ensure successful and secure installation of software..." 4 70
ntpdate 0.us.pool.ntp.org >/dev/null 2>&1

adduserandpass || error "Error adding username and/or password."

[ "$rootcmd" = "sudo" ] && [ -f /etc/sudoers.pacnew ] && cp /etc/sudoers.pacnew /etc/sudoers # Just in case

# Allow user to run $rootcmd without password. Since AUR programs must be installed
# in a fakeroot environment, this is required for all builds with AUR.
newperms "allnopass"

# Make pacman and paru colorful but turns off ilovecandy on the progress bar.
grep -q "^Color" /etc/pacman.conf || sed -i "s/^#Color$/Color/" /etc/pacman.conf ||
  sed -i "/UseSyslog/a Color" /etc/pacman.conf
grep -q "^ILoveCandy" /etc/pacman.conf && sed -i "s/^ILoveCandy/#ILoveCandy" /etc/pacman.conf
grep -q "^#ParallelDownloads" /etc/pacman.conf && sed -i "s/^#ParallelDownloads/ParallelDownloads/" /etc/pacman.conf

# Use all cores for compilation.
sed -i "s/-j2/-j$(nproc)/;s/^#MAKEFLAGS/MAKEFLAGS/" /etc/makepkg.conf

manualinstall yay-bin || error "Failed to install AUR helper."

grep -q '^[lib32]' /etc/pacman.conf || artixaddlib32repo || error "Failed to add lib32 repo"

grep -q '^[universe]' /etc/pacman.conf || artixadduniverserepo || error "Failed to add universe repo"

grep -q '^[extra]' /etc/pacman.conf || artixaddarchrepos || error "Failed to add Arch Linux repos."

refreshkeys || error "Error automatically refreshing Arch keyring. Consider doing so manually."

# The command that does all the installing. Reads the progs.csv file and
# installs each needed program the way required. Be sure to run this only after
# the user has been created and has priviledges to run $rootcmd without a password
# and all build dependencies are installed.
installationloop

dialog --title "ZIRLESS Installation" --infobox "Finally, installing \`libxft-bgra\` to enable color emoji in suckless software without crashes." 5 70
yes | $rootcmd -u "$name" $aurhelper -S libxft-bgra-git >/dev/null 2>&1

# Install the dotfiles in the user's home directory
putgitrepo "$dotfilesrepo" "/home/$name/.config" "$repobranch"
rm -f "/home/$name/README.md" "/home/$name/LICENSE" "/home/$name/FUNDING.yml"
# Create default urls file if none exists.
[ ! -f "/home/$name/.config/newsboat/urls" ] && echo "http://lukesmith.xyz/rss.xml
https://notrelated.libsyn.com/rss
https://www.youtube.com/feeds/videos.xml?channel_id=UC2eYFnH61tmytImy1mTYvhA \"~Luke Smith (YouTube)\"
https://www.archlinux.org/feeds/news/" > "/home/$name/.config/newsboat/urls"
# make git ignore deleted LICENSE & README.md files
git update-index --assume-unchanged "/home/$name/README.md" "/home/$name/LICENSE" "/home/$name/FUNDING.yml"

# Most important command! Get rid of the beep!
systembeepoff

# Make zsh the default shell for the user.
chsh -s /bin/zsh "$name" >/dev/null 2>&1
$rootcmd -u "$name" mkdir -p "/home/$name/.cache/zsh/"

# dbus UUID must be generated for Artix runit.
dbus-uuidgen > /var/lib/dbus/machine-id

# Use system notifications for Brave on Artix
echo "export \$(dbus-launch)" > /etc/profile.d/dbus.sh

# Tap to click
[ ! -f /etc/X11/xorg.conf.d/40-libinput.conf ] && printf 'Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
	# Enable left mouse button by tapping
	Option "Tapping" "on"
EndSection' > /etc/X11/xorg.conf.d/40-libinput.conf

# Fix fluidsynth/pulseaudio issue.
grep -q "OTHER_OPTS='-a pulseaudio -m alsa_seq -r 48000'" /etc/conf.d/fluidsynth ||
	echo "OTHER_OPTS='-a pulseaudio -m alsa_seq -r 48000'" >> /etc/conf.d/fluidsynth

# Start/restart PulseAudio.
pkill -15 -x 'pulseaudio'; $rootcmd -u "$name" pulseaudio --start

# This line, overwriting the `newperms` command above will allow the user to run
# serveral important commands, `shutdown`, `reboot`, updating, etc. without a password.
newperms "newpass"

# Last message! Install complete!
finalize
clear