#!/bin/sh
# Didier Spaier 2021
# Public domain as stated in https://unlicense.org/UNLICENSE
# This script removes unwanted records in slackbuilds_data, to avoid that
# slapt-src replaces packages that should be provided by the distribution.
# It requires slapt-src and slapt-get, links:
# https://software.jaos.org/
# https://github.com/jaos
# It works as-is in a Slint system, needs adaptation elsewhere.

if [ ! -f /etc/slapt-get/slapt-srcrc ]; then
	printf %b "/etc/slapt-get/slapt-srcrc not found.\nIs slapt-src installed?\n"
	exit
fi
if [ ! -f /etc/slapt-get/slapt-getrc ]; then
	printf %b "/etc/slapt-get/slapt-getrc not found.\nIs slapt-get installed?\n"
	exit
fi
. /etc/slapt-get/slapt-srcrc
. /etc/slapt-get/slapt-getrc
# We need some time (about 30 seconds here) to run.
echo "Please wait..."
cd $BUILDDIR || exit
if [ ! -f slackbuilds_data ]; then
	printf %b "File slackbuilds_data not found.\nrun \"slapt-src -u\".\n"
	exit
fi

# In Slint  exclude from slackbuilds_data packages available in:
# https://slackware.uk/slint/x86_64/slint-14.2.1/
# https://slackware.uk/salix/x86_64/slackware-14.2/
# But we allow to replace a package shipped in:
# https://slackware.uk/salix/x86_64/slackware-14.2/extra/
# as well as any other package.
slint="#slint-14.2.1#"
slackware="#slackware-14.2#"
extra="#slackware-14.2#extra#"

# We feed a sed file removing the unwanted records. We use DC1 (u+11) and
# DC2 (u+12) as separators as it is unlikely to find them in slackbuilds_data
sed -n "
/PACKAGE NAME:/{
	s/.*[[:space:]]//
	s/-[^-]*-[^-]*-[^-]*$//
	N
	s/\n//
	s,/,#,g
	/$extra/d
	/$slackware/{
		s/ .*//;s.*;s.*/NAME: &/d
		p
		d
	}
	/$slint/s/ .*//;s.*;s.*/NAME: &/dp
}" $WORKINGDIR/package_data|sort|uniq > remove_unwanted

# We put all data for each software on the same line.
sed "
/SLACKBUILD NAME:/N;N;N;N;N;N;N;N;N;N;N;s/\n//g
" slackbuilds_data > merged_lines
rm -f slackbuilds_data
echo "s//\n/g" > expand_lines
sed -f remove_unwanted -f expand_lines merged_lines > slackbuilds_data
rm -f merged_lines expand_lines remove_unwanted

# In case post-processing slackbuilds_data is needed (as in Slint to handle
# discrepancies in packages names between slackbuilds.org and Slackware), do it.
if [ -x /usr/libexec/slapt-src/post-process-slackbuilds_data ]; then
	/usr/libexec/slapt-src/post-process-slackbuilds_data
fi