#!/bin/sh
# Fast, cross-platform POSIX fetch script
# Mostly stolen from 6kg@github

## Distro
# freedesktop.org/software/systemd/man/os-release.html
# a common file that has variables about the distro
for os in /etc/os-release /usr/lib/os-release; do
    # some POSIX shells exit when trying to source a file that doesn't exist
    [ -f $os ] && . $os && break
done
[ -e "/data/data/com.termux" ] && ID="android $(getprop ro.build.version.release)"

## Kernel
# First try to get kernel veriosn from /proc/version
# Try uname command otherwise
[ -e "/proc/version" ] && read -r _ _ version _ < /proc/version
[ -z "$version" ] && version=$(uname -r)
kernel=${version%%-*}

## Uptime
# the simple math is shamefully stolen from aosync
[ -e "/proc/uptime" ] && IFS=. read -r uptime _ < /proc/uptime
d=$((uptime / 60 / 60 / 24))
up=$(printf %02d:%02d $((uptime / 60 / 60 % 24)) $((uptime / 60 % 60)))
[ "$d" -gt 0 ] && up="${d}d $up"

print() {
[ "$2" ] && printf '\033[1m  %b\033[0m %b%s\n' \
    "$1" "$2"
}

## Output
echo
print DIST "$ID"
print KERN "$kernel"
print SHLL "${SHELL##*/}"
print UPTM "$up"
# Colors
printf '  '
for i in 1 2 3 4 5 6; do
    printf '\033[9%sm%s\033[0m%b%s' "$i" "${colourblocks:-▅▅}"
done
echo