install-arch/install.sh

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#!/bin/sh
set -e
### COLORS ###
RED='\033[0;31m'
LGREEN='\033[1;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color
BOLD=$(tput bold)
NORM=$(tput sgr0)
### VARS ###
CURPHASE=1
MAXPHASE=2
### OPTIONS AND PARAMETERS ###
usage() {
printf "Usage: $0 [-nhv] (-p | [-d] <user>)\n -p: Install packages only\n -d: Install dotfiles only\n -h: Display this message\n -n: Do not prompt for confirmation\n -v: Verbose output\n user: User that the dotfiles should be installed to\n"
exit 2
}
set_var()
{
local varname=$1
shift
if [ -z "${!varname}" ]; then
eval "$varname=\"$1\""
else
echo "Error: $2 already set"
usage
fi
}
exclusive()
{
echo "Error: $1 exclusive with $2"
usage
}
while getopts ":nvhdpu:" c; do
case $c in
d)
[ "$INSTALL" = PACKAGES ] && exclusive '-p' '-d'
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MAXPHASE=$((MAXPHASE-1))
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set_var INSTALL DOTFILES "-d" ;;
p)
[ "$INSTALL" = DOTFILES ] && exclusive '-p' '-d'
[ -n "$INSTALLUSER" ] && exclusive '-p' '<user>'
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MAXPHASE=$((MAXPHASE-1))
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set_var INSTALL PACKAGES "-p" ;;
u)
[ "$INSTALL" = PACKAGES ] && exclusive '-p' '<user>'
set_var INSTALLUSER $OPTARG "-u" ;;
n) NOCONFIRM=true ;;
v) VERBOSE=true ;;
h) usage ;;
?) echo "Unknown option -$OPTARG"; usage ;;
esac
done
INSTALL=${INSTALL:-ALL}
shift $((OPTIND-1))
### VALIDATE USER ###
[ -z "$INSTALLUSER" ] && [ "$INSTALL" != "PACKAGES" ] && echo "Error: <user> required" && usage
if [ -n "$INSTALLUSER" ]; then
HOMEDIR="$(cat /etc/passwd | awk -F: '$1 ~ /^'$INSTALLUSER'$/ {print $6}')"
[ -z "$HOMEDIR" ] && echo "Error: User $INSTALLUSER does not exist" && exit 2
fi
### FORCE ROOT ###
[ $(whoami) != "root" ] && echo "Please run as root" && exit 1
### ASK FOR CONFIRMATION ###
if [ ! $NOCONFIRM ]; then
echo "${BOLD}Please confirm operation:${NORM}"
echo -ne "Installing ${LGREEN}${INSTALL@L}${NC}"
[ -n "$INSTALLUSER" ] && echo -ne " for ${LGREEN}$INSTALLUSER ($HOMEDIR)${NC}"
printf "\n"
echo -n "Continue installation? [y/N] "
read ans
case $ans in
y|Y) break ;;
*) exit 0 ;;
esac
fi
### INSTALLATION ###
[ $VERBOSE ] && set -x
printphase() {
echo -e "${BOLD}${YELLOW}[$CURPHASE/$MAXPHASE] $1 phase${NC}${NORM}"
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CURPHASE=$((CURPHASE+1))
}
install_aur() {
dir="$HOMEDIR/$1"
echo -n "Installing $1... "
sudo -u "$1" git clone -q "https://aur.archlinux.org/$1.git" "$dir" 2>&1 > /dev/null
pushd "$dir"
sudo -u "$1" makepkg -si --noconfirm 2>&1 > /dev/null
popd
rm -rf "$1"
echo "done"
}
remove() {
echo -n "Removing $1..."
set +e
pacman -Rs --noconfirm $1 2>&1 > /dev/null
set -e
echo "done"
}
install() {
echo -n "Installing $1..."
pacman -Sq --needed --noconfirm $1 2>&1 > /dev/null
echo "done"
}
prompt() {
[ $NOCONFIRM ] && return true
echo -n "$1 [Y/n]"
read ans
case $ans in
n|N) return false ;;
*) return true ;;
esac
}
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pacman_conf() {
echo -n "Adding $2 to $1 (/etc/pacman.conf)..."
awk '$0 ~ /^'$1'[[:blank:]]+=.*[[:blank:]]'$2'[[:blank:]].*/ { exit 0 }' /etc/pacman.conf
if [ $? = 0 ]; then
awk '$0 ~ /^'$1'[[:blank:]]+=.*/ { exit 1 }' /etc/pacman.conf
if [ $? = 1 ]; then
awk '
BEGIN { todo = 1 }
{
if ($0 ~ /^'$1'[[:blank:]]+=.*/ && todo)
{
$(NF+1) = "'$2'"
todo = 0
}
print $0
}' \
/etc/pacman.conf > /tmp/pacman.conf
mv /tmp/pacman.conf /etc/pacman.conf
else
awk '$0 ~ /^#'$1'[[:blank:]]+=[[:blank:]]*$/ { exit 1 } ' /etc/pacman.conf
if [ $? = 1 ]; then
awk '
BEGIN { todo = 1 }
{
if ($0 ~ /^#'$1'[[:blank:]]+=[[:blank:]]*$/ && todo)
{
$1 = "'$1'"
$(NF+1) = "'$2'"
todo = 0
}
print $0
}' \
/etc/pacman.conf > /tmp/pacman.conf
mv /tmp/pacman.conf /etc/pacman.conf
else
echo "'$1' = $2" >> /etc/pacman.conf
fi
fi
fi
echo "done"
}
link() {
echo -n "Linking $2 to $1... "
ln -sf $1 $2
echo "done"
}
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install_doas() {
#install_aur requires sudo or doas
[ ! $(prompt "Do you want to install doas (will remove sudo if installed)?") ] && return
install sudo
install_aur doas
remove sudo
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pacman_conf IgnorePkg sudo
pacman_conf NoUpgrade sudo
link /bin/doas /bin/sudo
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echo -n "Configuring doas... "
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echo "permit persist $INSTALLUSER as root" > /etc/doas.conf
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echo "permit nopass $INSTALLUSER as root cmd pacman args -Syu" >> /etc/doas.conf
echo "permit nopass $INSTALLUSER as root cmd pacman args -Syyu" >> /etc/doas.conf
echo "done"
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}
# PACKAGES
if [ "$INSTALL" != "DOTFILES" ]; then
printphase "Package installation"
echo -n "Upgrading system... "
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pacman -Sqyu --noconfirm 2>&1 > /dev/null
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echo "done"
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install_doas
install_aur yay
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fi