#!/bin/bash

# stops somewhere after in between the diff release loop (probably when there's no diff at all)
#set -e

[[ -n `alias | grep diff` ]] && unalias diff

mirror=http://nephtys.lip6.fr/pub/linux/distributions/slackware/

[[ -n $2 ]] && date=$2 || date=`date +%Y-%m-%d`
echo current is $date

release=150
releasepath=/root/lab/tagfiles/$release

if [[ -n $1 ]]; then
	last=$1
	lastpath=/root/lab/tagfiles/$last
else
	lastpath=`find /root/lab/tagfiles/ -type d -maxdepth 1 | \
		grep -E '[[:digit:]]+-[[:digit:]]+-[[:digit:]]+' | \
		sort | tail -1`

	# w/ timestamp
	# find . -type d -maxdepth 1 -printf '%T@ %p\n'

	#last=/root/lab/tagfiles/2021-03-01
	last=${lastpath##*/}
fi
echo last is $last

# BUG date vs. path
#[[ $date = $last ]] && echo try next week && exit 1

if [[ ! -d /root/lab/tagfiles/$release/ ]]; then
	mkdir /root/lab/tagfiles/$release/
	cd /root/lab/tagfiles/$release/
	for set in a ap d e f k kde l n t tcl x xap xfce y; do
		wget -q -O - $mirror/slackware64-15.0/slackware64/$set/tagfile > tagfile-$set
	done; unset set
	cd ../
fi

if [[ -d /root/lab/tagfiles/$date/ ]]; then
	echo /root/lab/tagfiles/$date/ already
else
	mkdir /root/lab/tagfiles/$date/
	cd /root/lab/tagfiles/$date/

	for set in a ap d e f k kde l n t tcl x xap xfce y; do
		wget -q -O - $mirror/slackware64-current/slackware64/$set/tagfile > tagfile-$set
	done; unset set

	cd ../
fi

# since last release
for set in a ap d e f k kde l n t tcl x xap xfce y; do
        diff -bu $releasepath/tagfile-$set $date/tagfile-$set
done > $date-since-$release.txt; unset set

# since last week
for set in a ap d e f k kde l n t tcl x xap xfce y; do
        diff -bu $lastpath/tagfile-$set $date/tagfile-$set
done > $date-since-$last.txt; unset set

cat <<EOF

results are available

	https://lab.nethence.com/tagfiles/$date-since-$release.txt
	https://lab.nethence.com/tagfiles/$date-since-$last.txt

EOF