Half-Life: PAK0.PAK generator

This repository contains scripts to generate a pak0.pak of
Half-Life that is identical to the one that ships on all original disc
pressings, when it still talked to the World Opponent Network
online service.

The Steam releases got rid of .pak files altogether, because they
(at one point) switched to .gcf archives.  Since the SteamPipe update,
all files are now completely loose and enforcing file consistency is
impossible for source ports.

These scripts within are stripping the content straight from installers
of demos and other official, free downloads.

This will only build you a pak0.pak file that will pass server purity
checks so that you can play multiplayer via source ports and things.
This will not grant you a complete install of Half-Life.  This will
not allow you to play Half-LIfe on Steam or by itself.

We will still have to improvise where other loose files come from.
I've found some good substitutes. If you want it to be truly authentic,
please find a 1.0.0.5 or Game of the Year disc pressing of Half-Life
and rip the data yourself.


Sources:

Half-Life: Uplink (web installer)
Half-Life Patch 1.1.1.0 (English)
Half-Life: Opposing Force - Standalone Demo
Half-Life SDK v2.3 Setup
Steam Installer with Half-Life Cache


Requirements:

- approximately 4 GB of disk space
- working C compiler
- GNU make (probably)
- wget
- magick


Getting started:

Run `./start.sh` and wait a few minutes. Make yourself some tea/coffee.

If you want to speed up the process, get these files off your NFS/NAS:

hl1110.exe
hl_sdk_v23.exe
hluplink.exe
opfordemofull.exe,
steaminstall_halflife.exe

...and place them alongside this README file.


Script explanation:

./build_tools.sh builds bmpfix, {hl,pak}extract, qfiles, rewise and
places them into ./_bin

./dl_sources.sh (no args) downloads and sha512 checks the install
files.

./rip_sources.sh (no args) extracts the files, and does trickery to
make 2 bad-CRC files work

./build_pak0.sh [gamedir] will read games/[gamedir]-pak0.sha256 and
assemble the pak0.pak

./build_loose.sh [gamedir] will read games[gamedir.sha256 and finds
other desired loose files

./ccase.sh fixes case sensitivity issues

the end result is placed into ./_build for you to copy wherever.
All the directories prefixed with '_' can be removed, as they're
created by the scripts.


Thanks:

Xylemon - for being the top dog that kept motivating me and for
delivering pizza onto my desk

Theuaredead` - for lots of research and pointers on where we can
acquire data sets and files

CYBERDEViL - for blessing us with REWise, a sane wise installer
extractor

HeteroChromia420 - for bothering me for years in regards to the
content purity mess

Valve - I know you don't love HL1 anymore, but thanks for bringing
it into this world


License:

Scripts in the root dir are CC0
ccase.sh was distributed by various Linux game ports, unknown author
tools/bmpfix is CC0
tools/gpl-quake/ contains GNU GPL V2 code.


Dependency licenses:

hllib is GNU LGPL 2.1
hlextract is GNU GPL V2
pakextract its own permissive (ISC-styled) license
REWise is GNU GPL V3


Need help:

None of this comes with support, warranty or whatever. Don't bother
ANYONE about this.  If you want to improve script compatibility or
whatever, feel free to reach out.