al-info

#!/usr/bin/env bash

# extremely simple system info script.
# written by Nathaniel Maia, 2017-2018

# fallback
FB="unknown"

# colours
RESET=$'\e[0m'
for n in {0..7}; do
	printf -v FG${n} "%b" "\e[3${n}m"
	printf -v BG${n} "%b" "\e[4${n}m"
done

# source whichever distro release file is available
if [[ -e /etc/os-release ]] && . /etc/os-release 2>/dev/null; then
	DIST="${ID,,}"
elif [[ -e /etc/lsb-release ]] && . /etc/lsb-release 2>/dev/null; then
	DIST="${DISTRIB_ID,,}"
fi

# system uptime
UPT="$(uptime -p)"
UPT="${UPT/up /}"
UPT="${UPT/ day?/d}"
UPT="${UPT/ hour?/h}"
UPT="${UPT/ minute?/m}"

# check if root user
(( UID == 0 )) && USR="${FG1}root" || USR="${FG4}${USER}"

# install date
if [[ -e /var/log/pacman.log ]]; then
	INST="$(head -n1 /var/log/pacman.log)"
	INST="${INST/ */}"
	INST="${INST/\[/}"
	INST="${INST//\-/ }"
fi

# gtk settings
if [[ -e ~/.config/gtk-3.0/settings.ini ]]; then
	THEME="$(awk -F'=' '/gtk-theme-name/ {print $2}' ~/.config/gtk-3.0/settings.ini)"
	ICONS="$(awk -F'=' '/gtk-icon-theme-name/ {print $2}' ~/.config/gtk-3.0/settings.ini)"
elif [[ -e ~/.gtkrc-2.0 ]]; then
	THEME="$(awk -F'"' '/gtk-theme-name/ {print $2}' ~/.gtkrc-2.0)"
	ICONS="$(awk -F'"' '/gtk-icon-theme-name/ {print $2}' ~/.gtkrc-2.0)"
fi

# login shell
SHLL="${SHELL##*/}"

# terminal name
TRM="${TERM/-256color/}"        # many terminals use a -256color suffix, remove it
TRM="${TRM/-unicode/}"          # rxvt can be rxvt-unicode, remove the -unicode suffix
TRM="${TRM/*-termite*/termite}" # termite is xterm-termite, truncate to just termite

# hostname
HOST="${HOST:-$(hostname 2>/dev/null)}"

# kernel version
KERN="${KERN:-$(uname -sr)}"
KERN="${KERN/-*/}"
KERN="${KERN,,}"

# MEM = used / total
FREE="$(free --mega)"
MB=$(awk 'NR==2 {print $3}' <<< "$FREE")
GB=$(awk 'NR==2 {print $3 / 1000}' <<< "$FREE")
TOT=$(awk 'NR==2 {print $2 / 1000}' <<< "$FREE")
(( MB > 1000 )) && MEM="${GB:0:5}gb used / ${TOT/\.*}gb total" || MEM="${MB}mb used / ${TOT/\.*}gb total"

# C = number of cores
THREADS=$(grep -c '^processor' /proc/cpuinfo)
CORES=$(grep '^core' /proc/cpuinfo | sort -r | awk -F':' 'NR == 1 {print $2 + 1}')
CORES=${CORES:-1}

# CPU = usage / threads
CPU=$(ps aux | awk 'BEGIN {sum = 0} {sum += $3}; END {print sum}')
CPU=${CPU/\.*}

# CPU needs to be divided by number of threads to get an average
if (( (CPU /= THREADS) > 100 )); then
	CPU="$CORES cores $THREADS threads @ 100% avg"
else
	CPU="$CORES cores $THREADS threads @ $CPU% avg"
fi

rep_char() {
	local char="${1:-=}"
	local num="${2:-$((${#USR} + 3 + ${#HOST}))}"
	local str="$(printf "%${num}s")"
	echo "${str// /$char}"
}

pkg_count() {
	pacman -Qq 2>/dev/null | wc -l || echo "$FB"
}

cur_wm() {
	if [[ -z $WM && $DISPLAY ]] && hash xprop >/dev/null 2>&1; then
		ID="$(xprop -root -notype _NET_SUPPORTING_WM_CHECK)"
		WM="$(xprop -id "${ID##* }" -notype -len 100 -f _NET_WM_NAME 8t)"
		WM="${WM/*WM_NAME = }" WM="${WM/\"}" WM="${WM/\"*}" WM="${WM,,}"
		echo "${WM:-$FB}"
	else
		echo "${WM:-tty$XDG_VTNR}"
	fi
}

BLOCKS="$BG1    $BG2    $BG3    $BG4    $BG5    $BG6    $BG7    ${RESET}"

# clear the screen and print everything out
clear
cat << EOF
${FG4}                     'c'
${FG4}                    'kKk,                   ${FG5}===>$RESET ${USR}${FG2} @ ${FG6}${HOST:-$FB}
${FG4}                   .dKKKx.                  ${FG5}$(rep_char '=')>
${FG4}                  .oKXKXKd.                 ${FG6}->$RESET   wm$FG1:     ${FG4}$(cur_wm)
${FG4}                 .l0XXXXKKo.                ${FG6}->$RESET   term$FG1:   ${FG4}${TRM:-$FB}
${FG4}                 c0KXXXXKX0l.               ${FG6}->$RESET   shell$FG1:  ${FG4}${SHLL:-$FB}
${FG4}                :0XKKOxxOKX0l.              ${FG6}->$RESET   uptime$FG1: ${FG4}${UPT:-$FB}
${FG4}               :OXKOc.,.c0XX0l.
${FG4}              :OK0o, ${FG1}...${FG4}'dKKX0l.            ${FG6}->$RESET   packages$FG1:  ${FG4}$(pkg_count)
${FG4}             :OX0c, ${FG1};xOx'${FG4}'dKXX0l.           ${FG6}->$RESET   kernel$FG1:    ${FG4}${KERN:-$FB}
${FG4}            :0KKo.${FG1}.o0XXKd'.${FG4}lKXX0l.          ${FG6}->$RESET   distro$FG1:    ${FG4}${DIST:-$FB}
${FG4}           c0XKd.${FG1}.oKXXXXKd..${FG4}oKKX0l.         ${FG6}->$RESET   installed$FG1: ${FG4}${INST:-$FB}
${FG4}         .c0XKk;${FG1}.l0K0OO0XKd..${FG4}oKXXKo.
${FG4}        .l0XXXk:${FG1},dKx,.'l0XKo.${FG4}.kXXXKo.       ${FG6}->$RESET   ram$FG1: ${FG4}${MEM:-$FB}
${FG4}       .o0XXXX0d,${FG1}:x;   .oKKx'${FG4}.dXKXXKd.
${FG4}      .oKXXXXKK0c.${FG1};.    :00c'${FG4}cOXXXXXKd.
${FG4}     .dKXXXXXXXXk,${FG1}.     cKx'${FG4}'xKXXXXXXKx'    ${FG6}->$RESET   theme$FG1: ${FG4}${THEME:-$FB}
${FG4}    'xKXXXXK0kdl:.     ${FG1}.ok; ${FG4}.cdk0KKXXXKx'   ${FG6}->$RESET   icons$FG1: ${FG4}${ICONS:-$FB}
${FG4}   'xKK0koc,..         ${FG1}'c, ${FG4}    ..,cok0KKk,
${FG4}  ,xko:'.                           .':okx, $BLOCKS

EOF