#!/bin/sh
# aget [URL] - like wget, but archive the results

url=$1
base=${url##*/}
date="$(date -I)"
out="$base-$date"

for f in "$base-"????-??-??; do
	[ "$f" != "$out" ] && last=$f
done

wget -O "$out" "$url"

if ! [ -f "$last" ] || ! cmp "$last" "$out"; then
	echo "new $out"
	[ -x "$last" ] && chmod +x "$out"
	[ -h "$base" ] && ln -sf "$out" "$base"
else
	echo unmodified
	rm "$out"
	false
fi