#!/usr/bin/env sh

HOST=$(hostname)
CPU=$(cat /proc/cpuinfo | grep "model name" | head -1 | cut -d':' -f2) 
GPU=$(lspci 2>/dev/null | grep -i "vga\|3d\|display" | head -1 | cut -d':' -f3) # requires pciutils
TMEM=$(free -m | awk '/^Mem:/{print $2}')
UMEM=$(free -m | awk '/^Mem:/{print $3}')
OS=$(uname -sr)
KERN=$(uname -r)
TDSK=$(df -m / | awk 'NR==2{print $2}')
UDSK=$(df -m / | awk 'NR==2{print $3}')
UCPU=$(mpstat 1 1 2>/dev/null | awk '/all/ {print 100 - $NF"%"}' | tail -n1) # requires mpstat

if [ "$1" = "-h" ]; then
    cat <<EOF
sif - simple info fetcher.

usage: sif [-h/-v].

options:
    -h, shows this help.
    -v, shows ver.
EOF
    exit 0
fi

if [ "$1" = "-v" ]; then
    cat <<EOF
ver: 1.0.
license: GPL-3.0-or-later.
EOF
    exit 0
fi

if command -v pkg_add >/dev/null 2>&1; then
    PKGC=$(pkg_info 2>/dev/null | wc -l | sed 's/      //g')
    PKGM="pkg"
elif command -v apk >/dev/null 2>&1; then
    PKGC=$(apk list --installed 2>/dev/null | wc -l)
    PKGM="apk"
elif command -v pacman >/dev/null 2>&1; then
    PKGC=$(pacman -Q 2>/dev/null | wc -l)
    PKGM="pacman"
elif command -v dpkg >/dev/null 2>&1; then
    PKGC=$(dpkg -l 2>/dev/null | wc -l)
    PKGM="dpkg"
elif command -v rpm >/dev/null 2>&1; then
    PKGC=$(rpm -qa 2>/dev/null | wc -l)
    PKGM="rpm"
elif command -v xbps-query >/dev/null 2>&1; then
    PKGC=$(xbps-query -l 2>/dev/null | wc -l)
    PKGM="xbps"
elif command -v emerge >/dev/null 2>&1; then
    PKGC=$(ls -1 /var/db/pkg 2>/dev/null | wc -l)
    PKGM="portage"
elif command -v pkg >/dev/null 2>&1; then
    PKGC=$(pkg info 2>/dev/null | wc -l)
    PKGM="pkg"
else
    PKGC="?"
    PKGM="unknown"
fi

echo "${USER}@${HOST}" >&2
echo "os: ${OS}." >&2
echo "kernel: ${KERN}." >&2
echo "shell: ${SHELL##*/}." >&2 # saves a shell fork
echo "pkgs: ${PKGC} (${PKGM})." >&2
echo "editor: ${EDITOR}." >&2
echo "de/wm: ${XDG_CURRENT_DESKTOP:-$DESKTOP_SESSION}." >&2
echo "term: ${TERM}." >&2
echo "cpu: ${CPU} ${UCPU}." >&2
echo "gpu: ${GPU}." >&2
echo "mem: ${UMEM}MiB/${TMEM}MiB." >&2
echo "disk: ${UDSK}MiB/${TDSK}MiB." >&2