#!/bin/sh

usage() {
	>&2 cat <<-EOF
	usage: supd
	       supd <prefix> <dir>
		   stdout | supd <prefix>
	EOF
	exit 1
}

check ()
{
	for dir in $1
	do
		printf '%s: ' "$2/$dir" | sed "s#$HOME#~#" >&2
		cd "$2/$dir" || continue
		git pull > /dev/null 2>&1 &&
			printf 'Up to date.' ||
			printf 'Couldn'\''t update.'
		printf ' '
		printf '%s %s\n' "$(git status --short 2> /dev/null |
			awk 'NR==1 {print $1}')" "$(git branch -v 2>/dev/null |
			grep '^\*' | cut -f2 -d'[' | cut -f1 -d' ' |
			sed 's/ahead/↑/;s/behind/↓/;s/\*//')"

	done
}

if [ "$#" -eq 0 ]
then
	dirs="installdrier dotfiles password-store"
	prefix="$HOME/src"
elif [ ! -t 0 ]
then
	prefix="$1"
	dirs="$(cat)"
else
	prefix="$1"
	shift || usage
	dirs="$*"
	[ "$dirs" ] || usage
fi
check "$dirs" "$prefix"