installer

#!/bin/bash
#
# qubes-qtile installer
#
# Copyright (C) 2024  David Hobach  LGPLv3
# 0.5


function errorOut {
>&2 echo "ERROR: $1"
>&2 echo "Aborting..."
exit 1
}

#name of the directory this script resides in (hopefully)
SCRIPT_DIR="$(readlink -f "${BASH_SOURCE[0]}")" || errorOut "Failed to execute readlink."
SCRIPT_DIR="$(dirname "$SCRIPT_DIR")" || errorOut "Failed to execute dirname."

#name of this script
SCRIPT_NAME="${BASH_SOURCE[0]##*/}"

#various install paths
ENV_DIR="$SCRIPT_DIR/qtile-env"
PKG_DIR="$SCRIPT_DIR/pkgs"
UTIL_DIR="$SCRIPT_DIR/util"
QTILE_BIN="/usr/bin/qtile"
ICAL_BIN="/usr/bin/ical"
XSESSION_DIR="/usr/share/xsessions"
QTILE_XSESSION="$XSESSION_DIR/qtile.desktop"
QTILE_CONF_DIR="/etc/xdg/qtile"

function usage {
echo "Usage: $SCRIPT_NAME install|uninstall|reinstall"
exit 1
}

function isInstalled {
[ -d "$ENV_DIR" ] || command -v qtile &> /dev/null || [ -d "$QTILE_CONF_DIR" ]
}

function installR {
isInstalled && errorOut "qubes-qtile already appears to be installed. Either remove the existing installation manually beforehand or use the reinstall command. Reinstalling will overwrite $QTILE_CONF_DIR."

echo "Creating the python venv..."
python3 -m venv "$ENV_DIR" || errorOut "Failed to create the python venv."

echo "Installing qtile inside the python venv..."
source "$ENV_DIR/bin/activate" || errorOut "Failed to activate the python venv."
cd "$PKG_DIR" || errorOut "Failed to switch to $PKG_DIR."

#optional runtime dependencies
pip3 install --no-index --find-links=. dbus* || errorOut "Failed to install dbus-fast."

#xcffib sometimes requires cffi to be installed beforehand
pip3 install --no-index --find-links=. cffi* || errorOut "Failed to install cffi."

pip3 install --no-index --find-links=. qtile* || errorOut "Failed to install qtile."
deactivate || errorOut "Failed to deactivate the python venv."

echo "Applying patches..."
local patch
for patch in "$SCRIPT_DIR/patches"/*.patch ; do
	[[ "$patch" == *"/*.patch" ]] && break
	patch -s -p1 --directory "$ENV_DIR/lib"/python*/site-packages/ < "$patch" || errorOut "Failed to apply the patch $patch."
done

echo "Injecting qubes.py..."
cp -f "$SCRIPT_DIR/qubes.py" "$ENV_DIR/lib"/python*/"site-packages/libqtile/"

echo "Creating a symlink to $QTILE_BIN..."
sudo ln -s "$ENV_DIR/bin/qtile" "$QTILE_BIN" || errorOut "Failed to create the symlink $QTILE_BIN."
sudo ln -s "$UTIL_DIR/ical" "$ICAL_BIN" || errorOut "Failed to create the symlink $ICAL_BIN."

echo "Creating $QTILE_CONF_DIR (NOTE: Use ~/.config/qtile/config.py for your custom configuration)..."
sudo mkdir -p "$QTILE_CONF_DIR" || errorOut "Failed to create $QTILE_CONF_DIR."
sudo cp -f "$SCRIPT_DIR/config.py" "$QTILE_CONF_DIR/config.py" || errorOut "Failed to copy the qtile configuration."
sudo cp -f "$SCRIPT_DIR/autostart/"* "$QTILE_CONF_DIR/" || errorOut "Failed to copy the autostart files."
sudo chown -R root:root "$QTILE_CONF_DIR" || errorOut "Failed to set the permissions on $QTILE_CONF_DIR."

echo "Creating $QTILE_XSESSION..."
sudo mkdir -p "$XSESSION_DIR" || errorOut "Failed to create $XSESSION_DIR."
sudo cp -f "$SCRIPT_DIR/qtile.desktop" "$QTILE_XSESSION" || errorOut "Failed to copy $QTILE_XSESSION."
sudo chown root:root "$QTILE_XSESSION" || errorOut "Failed to set the permissions on $QTILE_XSESSION."
}

function uninstallR {
echo "Removing $QTILE_BIN..."
sudo rm -f "$QTILE_BIN"

echo "Removing $ICAL_BIN..."
sudo rm -f "$ICAL_BIN"

echo "Removing $QTILE_CONF_DIR..."
sudo rm -rf "$QTILE_CONF_DIR"

echo "Removing $QTILE_XSESSION..."
sudo rm -f "$QTILE_XSESSION"

echo "Removing $ENV_DIR..."
rm -rf "$ENV_DIR"

return 0
}

function reinstallR {
uninstallR || errorOut "Failed to uninstall."
installR
}

function main {
[ $# -ne 1 ] && usage

[ $EUID -eq 0 ] && errorOut "This script must not be run as root."

#parse commands
local cmd="$1"

case "$cmd" in
	install)
	installR
	;;

	uninstall)
	uninstallR
	;;
	
	reinstall)
	reinstallR
	;;

	*)
	usage
	;;
esac

echo "All done."
exit 0
}

main "$@"