WIP packageconfig.json docs

doc/PackageConfig.md

@@ -1,3 +1,156 @@
 # The packageconfig.json File
 
-TODO
+## Overview
+
+Many of the tools in this repo, such as `ue4-package.ps1` and `ue4-release.ps1`
+depend on a configuration file `packageconfig.json`.
+
+This file should be in the root of your UE4 project. Details of its contents
+are below, but here's an example demonstrating many of the features:
+
+```json
+{
+    "OutputDir": "C:\\Users\\Steve\\Projects\\Builds\\Game1",
+    "ZipDir": "C:\\Users\\Steve\\Projects\\Archives",
+
+    "Target": "Game1",
+    "CookAllMaps": true,    
+    "MapsExcluded": [
+        "TestMap",
+    ],
+    "UsePak": true,
+
+    "DefaultVariants": [
+        "Win64Private",
+        "Win64Itch",
+        "Win64Steam"
+    ],
+
+    "Variants": [
+        {
+            "Name": "Win64Private", 
+            "Platform": "Win64",
+            "Configuration": "Development",
+            "ExtraBuildArguments": "-EnableDebugPanel",
+            "Zip": true
+        },
+        {
+            "Name": "Win64Steam", 
+            "Platform": "Win64",
+            "Configuration": "Shipping",
+            "ReleaseTo": [
+                "Steam"
+            ],
+            "SteamAppId": "783465",
+            "SteamDepotId": "1238594",
+            "SteamLogin": "MySteamLogin",
+            "ExtraBuildArguments": "-EnableSteamworks"
+        },
+        {
+            "Name": "Win64Itch", 
+            "Platform": "Win64",
+            "Configuration": "Shipping",
+            "ReleaseTo": [
+                "Itch"
+            ],
+            "ItchAppId": "my-itch-user/game1",
+            "ItchChannel": "win64"
+        }
+    ],
+}
+
+```
+
+## Overall File Structure
+
+The `packageconfig.json` has 2 main parts:
+
+* Global properties
+* A list of Variants
+
+Variants are there to allow you to build / package for multiple scenarios, such as
+builds for your private use, builds for certain stores, different platforms, and so on.
+
+Global properties apply everywhere, whilst properties contained in each Variant section
+apply only to that specific build variant.
+
+## Global Properties
+
+### `OutputDir` 
+*Mandatory Setting - string*
+
+This is the root folder in which packaged games are placed. 
+Subfolders will be created for version numbers and variants, see the [Packaging Script docs](Package.md)
+for more information.
+
+### `Target`
+*Mandatory Setting - string*
+
+The name of the target which you will package, which is usually your game name
+and often the same name as the `.uproject` file.
+
+### `Variants`
+*Mandatory Setting - array of [PackageVariants](#package-variants)*
+
+This list is where you define the way you want to package your game. See
+the of [PackageVariant](#package-variants) documentation below for more details.
+
+
+### `CookAllMaps`
+*Optional Setting - boolean: Default=true*
+
+If true, all `.umap` files in your Content folder will be added to the list to
+cook when packaging. You can exclude some using the [`MapsExcluded`](#mapsexcluded)
+option if you need to.
+
+If false, only maps listed in [`MapsIncluded`](#mapsincluded) will be cooked.
+
+### `MapsExcluded`
+*Optional Setting - array of strings*
+
+If [`CookAllMaps`](#cookallmaps) is true, any maps named in this array will be
+excluded from the cooking process. Do not include the folder name or extension of
+the map file, just the map name.
+
+### `MapsIncluded`
+*Optional Setting - array of strings*
+
+If [`CookAllMaps`](#cookallmaps) is false, the only maps that will be cooked are
+those explicitly listed in this array. Do not include the folder name or extension of
+the map file, just the map name.
+
+### `DefaultVariants`
+*Optional Setting - array of strings*
+
+This is a list of [Variant](#package-variant) names - unless otherwise specified on the command line,
+this is the set of variants which will be packaged by the [Packaging Script](Package.md).
+This just makes it faster / less error prone to perform your regular packaging tasks.
+
+### `UsePak`
+*Optional Setting - boolean: Default=true*
+
+If true, combine packaged files into a .pak file.
+
+### `ZipDir`
+*Optional Setting - string* 
+
+For variants which enable the [`Zip`](#zip) option, this is the directory that
+zipped packages will be created in.
+
+### `ProjectFile`
+*Optional Setting - string* 
+
+By default, scripts will locate your `.uproject` file automatically in the root of
+your UE4 project folder. If for any reason you have more than one, you can 
+specify which to use with this setting.
+
+## Package Variants
+
+The [`Variants`](#variants) property contains a list of ways you want to 
+build and package your game. You can specify the [default list](#defaultvariants) of variants you
+want to package, or name one or more on the command line explicitly.
+
+ Each entry has these properties:
+
+
+