#!/bin/bash

#
# grab and compare slackware tag file changes
# enable as a weekly cron job
#

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

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

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

base=/data/www/lab.nethence.com/tagfiles
release=150
releasepath=$base/$release

[[ ! -d $base/ ]] && echo $base/ not found && exit 1

echo
echo checking tag file changes between $release and current
echo

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

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

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

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

if [[ ! -d $base/$release/ ]]; then
	mkdir $base/$release/
	cd $base/$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 $base/$date/ ]]; then
	echo $base/$date/ already
else
	mkdir $base/$date/
	cd $base/$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 is available since last release

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

also here are the changes since last week

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

EOF