Jenkins.UnrealEngine.Builder

Groovy scripts for use in Jenkinsfiles to build Unreal Engine 4

Loading the Library

You can either:

• Add this repo as a Git submodule (pick the v1 branch)
• Copy UnrealEngine.groovy into your repository
• Use the below snippet to checkout the repo every build:

def builder;
dir ('Builder') {
    git(url: 'https://github.com/alanedwardes/Jenkins.UnrealEngine.Builder.git', branch: 'v1');
    builder = load('UnrealEngine.groovy');
}

Versioning

If pulling this library in your build, always use a versioned branch, do not use main. The versioned branches are guaranteed to be updated with forwards-compatible changes (fixes and features).

• v1 Initial version of tools

Usage Examples

1. Cooking your Game
2. Building your Game
3. Building Lighting
4. Extracting Symbols

Build Cook Run

The below snippet runs Unreal Engine 4 build tools via the command line to build, cook and package your game, similar to doing so in the Unreal Engine Editor UI:

def buildResult = builder.buildCookRun()
    .enginePath('Path/To/UnrealEngine')
    .noPerforce(true)
    .verbose(true)
    .project('Path/To/MyProject.uproject')
    .shouldCook(true)
    .shouldStage(true)
    .shouldArchive(true)
    .forDistribution(true)
    .shouldBuild(true)
    .shouldPackage(true)
    .skipCookingEditorContent(true)
    .targetPlatform('Win64')
    .clientConfig('Shipping')
    .usePak(true)
    .archiveDirectory('Path/To/Archive)
    .run(this);
    
echo(buildResult.deployPath); // Prints "Path/To/WindowsNoEditor"

Option	Required	Type	Description
enginePath	Yes	String	The path to Unreal Engine
verbose	-	Boolean	The amount of detail to write to the log
veryVerbose	-	Boolean	The amount of detail to write to the log
noPerforce	-	Boolean	Disables Perforce functionality (default if not run on a build machine)
logFileName	-	String	Specifies the path to a log file to write. Note that the default mode (eg. building, generating project files) will create a log file by default if this not specified
logTimestamps	-	Boolean	Whether to include timestamps in the log
logFromMsBuild	-	Boolean	Whether to format messages in MsBuild format
writeProgressMarkup	-	Boolean	Whether to write progress markup in a format that can be parsed by other programs
noMutex	-	Boolean	Whether to ignore the mutex
waitMutex	-	Boolean	Whether to wait for the mutex rather than aborting immediately
remoteIni	-	String
clientConfig	Yes	String	Debug, Shipping, Test, Development, DebugGame
targetPlatform	Yes	String	Sets platforms to build for non-dedicated servers
project	Yes	String	Package the project for the target platform
scriptsForProject	-	String	-
archiveDirectory	-	String	Directory to archive the client to
shouldCook	-	Boolean	Determines if the build is going to use cooked data
shouldStage	-	Boolean	Put this build in a stage directory
shouldArchive	-	Boolean	Put this build in an archive directory
forDistribution	-	Boolean	Package for distribution of the project
shouldBuild	-	Boolean	If build step should be executed
shouldPackage	-	Boolean	Package the project for the target platform
skipCookingEditorContent	-	Boolean	Skips content under /Engine/Editor when cooking
usePak	-	Boolean	Should use packfiles
executable	-	String	The Unreal Engine 4 executable to use
noCompileEditor	-	Boolean	-

Build

The below snippet builds the editor binaries for your chosen platform using Unreal Build Tool:

builder.build()
    .enginePath('Path/To/UnrealEngine')
    .target('MyGameEditor')
    .clientConfig('Development')
    .targetPlatform('Win64')
    .useUBTMakefiles(false)
    .allowFASTBuild(false)
    .allowHotReloadFromIDE(false)
    .project('Path/To/MyProject.uproject')
    .run(this);

Option	Required	Type	Description
enginePath	Yes	String	The path to Unreal Engine
verbose	-	Boolean	The amount of detail to write to the log
veryVerbose	-	Boolean	The amount of detail to write to the log
noPerforce	-	Boolean	Disables Perforce functionality (default if not run on a build machine)
logFileName	-	String	Specifies the path to a log file to write. Note that the default mode (eg. building, generating project files) will create a log file by default if this not specified
logTimestamps	-	Boolean	Whether to include timestamps in the log
logFromMsBuild	-	Boolean	Whether to format messages in MsBuild format
writeProgressMarkup	-	Boolean	Whether to write progress markup in a format that can be parsed by other programs
noMutex	-	Boolean	Whether to ignore the mutex
waitMutex	-	Boolean	Whether to wait for the mutex rather than aborting immediately
remoteIni	-	String
clientConfig	Yes	String	Debug, Shipping, Test, Development, DebugGame
targetPlatform	Yes	String	Sets platforms to build for non-dedicated servers
project	Yes	String	Package the project for the target platform
usePrecompiled	-	Boolean	Use existing static libraries for all engine modules in this target
allowXGE	-	Boolean	Whether XGE may be used
allowFASTBuild	-	Boolean	Whether FASTBuild may be used
useUBTMakefiles	-	Boolean	Enables support for very fast iterative builds by caching target data
maxParallelActions	-	Integer	Number of actions that can be executed in parallel. If 0 then code will pick a default based on the number of cores available. Only applies to the ParallelExecutor
forceHeaderGeneration	-	Boolean	If true, force header regeneration. Intended for the build machine
doNotBuildUHT	-	Boolean	If true, do not build UHT, assume it is already built
failIfGeneratedCodeChanges	-	Boolean	If true, fail if any of the generated header files is out of date
allowHotReloadFromIDE	-	Boolean	True if hot-reload from IDE is allowed
skipRulesCompile	-	Boolean

Resave Packages

The below snippet runs lightmass for the specified map, and rebuilds reflection captures:

builder.resavePackages()
    .enginePath('Path/To/UnrealEngine')
    .targetPlatform('Win64')
    .project('Path/To/MyProject.uproject')
    .projectOnly(true)
    .mapsOnly(true)
    .quality('Preview')
    .buildLighting(true)
    .buildReflectionCaptures(true)
    .allowCommandletRendering(true)
    .addMap('/Game/Maps/MyMap1')
    .addMap('/Game/Maps/MyMap2')
    .run(this);

⚠️ If your Windows build agent is running as a service user, this will fail when trying to initialise the GPU. The Jenkins agent must be running interactively (e.g. started by a logged in user and visible on the desktop).

Option	Required	Type	Description
enginePath	Yes	String	The path to Unreal Engine
targetPlatform	Yes	String	Sets platforms to build for non-dedicated servers
project	Yes	String	Package the project for the target platform
skipMaps	-	Boolean	-
mapsOnly	-	Boolean	-
projectOnly	-	Boolean	-
skipDeveloperFolders	-	Boolean	-
onlyDeveloperFolders	-	Boolean	-
fixupRedirects	-	Boolean	This option will filter the package list and only save packages that are redirectors, or that reference redirectors
buildLighting	-	Boolean	Determine if we are building lighting for the map packages on the pass
buildReflectionCaptures	-	Boolean	Determine if we are building reflection captures for the map packages on the pass
buildTextureStreamingForAll	-	Boolean	Rebuilds texture streaming data for all packages, rather than just maps
buildTextureStreaming	-	Boolean	Determine if we are building texture streaming data for the map packages on the pass
onlyMaterials	-	Boolean	Only process packages containing materials
buildNavigationData	-	Boolean	Determine if we are building navigation data for the map packages on the pass
filterByCollection	-	String	Check for filtering packages by collection
buildHLOD	-	Boolean	Determine if we are building HLOD data for the map packages on the pass.
allowCommandletRendering	-	Boolean	-
quality	-	String	Lighting quality, defaults to Production.
firstPackage	-	String	Allow for an option to restart at a given package name (in case it dies during a run, etc)
packageSubString	-	String	-
addMap	-	String	Adds the specified map to the build (if no maps specified, the default is all)

Extracting Symbols

On Windows, the below snippet runs the symstore.exe utility and extracts symbols for your deployed game files. Symstore can be found as part of the Windows Debugging Tools: https://docs.microsoft.com/en-us/windows/win32/debug/using-symstore

builder.extractSymbols()
    .symstore('C:\\Program Files (x86)\\Windows Kits\\10\\Debuggers\\x64\\symstore.exe')
    .source(buildResult.deployPath)
    .destination(env.WORKSPACE + '/Symbols')
    .product('Your Product Name')
    .run(this);

The symbols can then be uploaded somewhere, for example Amazon S3:

withAWS(region: 'eu-west-1', credentials: 'MyAWSCredentials') {
    s3Upload(bucket: 'symbols', workingDir: env.WORKSPACE + '/Symbols', includePathPattern: '**/*');
}

Option	Required	Type	Description
symstore	Yes	String	The path to symstore.exe
source	Yes	String	The path to your deployed game, for example the "WindowsNoEditor" folder
destination	Yes	String	The path to output the symbols
product	Yes	String	The name of the product to identify these symbols (see symstore.exe documentation)