#!/bin/sh

# builds a pk3 file that's alphabetically sorted
mk_pk3()
{
	tree -fi > ./build_contents.txt
	sed -i '/build_contents/d' ./build_contents.txt
	sed -i '/directories,/d' ./build_contents.txt
	zip -0 "$1".pk3 -@ < ./build_contents.txt
	rm ./build_contents.txt
	mv "$1".pk3 ../"$1".pk3
}

# grabs a patch .zip from archive.org and saves it as a pk3
grab_patch()
{
	wget -nc -O ./pak$2.pk3 http://archive.org/download/hl_shareware_data/valve/$1.zip
}

SCRPATH="$( cd "$( dirname $(readlink -nf $0) )" && pwd )"
OUTPK3DIR="pak1_retail.pk3dir"

if ! [ -x "$(command -v unshield)" ]; then
	printf "Error: unshield is not installed.\n" >&2
	exit 1
fi

if ! [ -x "$(command -v rsync)" ]; then
	printf "Error: rsync is not installed.\n" >&2
	exit 1
fi

if ! [ $# -gt 0 ]; then
	printf "Path to MOUNTED CD-ROM folder, e.g. /mnt/cdrom:\n"
	read CDROM_PATH
else
	CDROM_PATH="$1"
fi

if ! [ -f "$CDROM_PATH"/data1.cab ]; then
	printf "Error: data1.cab not found in $CDROM_PATH.\n" >&2
	exit 1
fi

# Grab the cabinet data off the CD
mkdir -p ./tmp
unshield -d ./tmp x "$CDROM_PATH"/data1.cab

# Let's shove them all into a convenient .pk3dir
mkdir -p ./$OUTPK3DIR
mv -v ./tmp/Half-Life_PAK_File/valve/pak0.pak ./pak00_cd.pak
rsync -av ./tmp/Half-Life_Program_Files/valve/ ./$OUTPK3DIR/
mv -v ./tmp/Half-Life_Program_Files/media ./$OUTPK3DIR/media
mv -v ./tmp/Half-Life_Program_Files/logos ./$OUTPK3DIR/logos
cd ./$OUTPK3DIR
mk_pk3 pak01_cd
cd "$SCRPATH"

# Get the latest patch, because that'll fix the menu assets and add more fun, free content
grab_patch 10051006 02_1006
grab_patch 10061008 03_1008
grab_patch 10081009 04_1009
grab_patch 10091010 05_1010
grab_patch 10101013 06_1013
grab_patch 10131015 07_1015
grab_patch 10151016 08_1016
grab_patch 10161100 09_1100
grab_patch 11001101 10_1101
grab_patch 11011104 11_1104
grab_patch 11041106 12_1106
grab_patch 11071108 14_1108
grab_patch 11081109 15_1109
grab_patch 11091110 16_1110

rm -rfv ./$OUTPK3DIR
rm -rfv ./tmp