Loki Patch Tools 1.0


Introduction
============
This is a set of tools written by Loki Software, Inc., designed to
create a set of binary patches that can be easily used either by
themselves or in conjunction with the Loki Update Tool.


Licensing
=========
This update tool is available for use under the GNU General Public License.


How To Create A Patch
=====================

 * Create a directory for your patch source files:

     mkdir upgrade
     cd upgrade

 * Create binary and data directories for the original files. e.g: 

     mkdir bin-1.54a-x86 data-1.54a

 * Create binary and data directories for the new files, e.g: 

     mkdir bin-1.54b-x86 data-1.54b

 * Copy the appropriate files into the directories, e.g.: 

    cp /usr/local/games/rt2.old/rt2 bin-1.54a-x86/rt2
    cp /usr/local/games/rt2.new/rt2 bin-1.54b-x86/rt2

    cp /usr/local/games/rt2.old/default2.lng data-1.54a/
    cp /usr/local/games/rt2.new/default2.lng data-1.54b/

 * Copy the patch README into the new data directory, e.g: 

    cp /usr/local/games/rt2.new/README-1.54b data-1.54b/README-1.54b

 * Copy the patch tools image directory to a new patch directory tree, e.g: 

    cp -av ~/loki_patch/image rt2-1.54b-x86

 * Generate deltas of the binaries and data files. 

     make_patch rt2-1.54b-x86/patch.dat delta-install bin-1.54a-x86 bin-1.54b-x86
     make_patch rt2-1.54b-x86/patch.dat delta-install data-1.54a-x86 data-1.54b-x86

   The make_patch tool is very flexible, run it without any options to see a list of commands that it recognizes. 

 * Customize the patch description file, patch.dat, if necessary, e.g.

     vi rt2-1.54b-x86/patch.dat

 * Copy the README into the patch directory, e.g: 

     cp data-1.54b/README-1.54b rt2-1.54b-x86/README.txt

   This file is shown to the user before they apply the patch. 

 * Pack the patch archive, e.g: 

     makeself.sh rt2-1.54b-x86 rt2-1.54b-x86.run "Railroad Tycoon II 1.54b update" ./update.sh

 * Test the patch on a fresh install, e.g: 

     # remove old versions, install from CD, patch up to current level
     sh rt2-1.54b-x86.run

 * Generate the GPG signature, named patch.sig, e.g: 

     gpg --secret-keyring /mnt/cdrom/secring.gpg --detach-sign rt2-1.54b-x86.run

 * Generate the MD5 checksum, named patch.md5, e.g: 

     md5sum rt2-1.54b-x86.run >rt2-1.54b-x86.run.md5

 * Generate the README, named patch.txt, e.g: 

     cp rt2-1.54b-x86/README.txt rt2-1.54b-x86.run.txt

 * Generate the Loki Update Tool entry for the patch, e.g:

     loki_patch --info rt2-1.54b-x86/patch.dat >>updates.txt

 * Copy the patch to your public relase directory and you're done!


Feedback
========
You can send feedback to setup@lokigames.com, or join the fun on the
Loki Setup newsgroup: news://news.lokigames.com/loki.open-source.setup


Author
======
The Loki Patch Tools were written by Sam Lantinga at Loki Software, Inc.