Automating Build Artifacts for Storefront Submission

In this lesson, you will learn how to automate the packaging of your build artifacts to ensure they strictly adhere to the technical metadata and file structure requirements of major digital storefronts.

When preparing a multiplayer game for submission, manually creating builds is error-prone and inefficient. Storefronts like Steam, the Epic Games Store, or console platforms require specific directory structures, manifest files, and versioning protocols. Automating this ensures that every artifact generated by your CI/CD pipeline is "store-ready" without manual intervention.

To achieve this in Unity, we leverage the UnityEditor.Build.Reporting namespace and BuildPipeline to trigger a build and immediately wrap the output in a post-process script. Instead of just producing an .exe or .app, your script should consolidate the binary, your generated Addressable bundles, and the required storefront metadata (like steam_appid.txt or platform-specific configuration files) into a final distribution package (e.g., a .zip or custom archive).

Here is a simplified example of how you might hook into the build process to move artifacts into a distribution-ready folder:

using UnityEditor;
using UnityEditor.Build.Reporting;
using System.IO;

public class StorefrontPostProcessor
{
    [MenuItem("Build/Automate Store Submission")]
    public static void BuildForStore()
    {
        BuildPlayerOptions options = new BuildPlayerOptions();
        options.scenes = new[] { "Assets/Scenes/Main.unity" };
        options.locationPathName = "Builds/StoreOutput/GameBinary.exe";
        options.target = BuildTarget.StandaloneWindows64;

        BuildReport report = BuildPipeline.BuildPlayer(options);

        if (report.summary.result == BuildResult.Succeeded)
        {
            // Inject storefront-specific manifest file
            File.WriteAllText("Builds/StoreOutput/store_manifest.json", "{ \"version\": \"1.0.0\" }");
            
            // Move processed Addressables to the required sub-folder
            Directory.CreateDirectory("Builds/StoreOutput/Content");
            File.Copy("Library/com.unity.addressables/aa/Windows/catalog.json", "Builds/StoreOutput/Content/catalog.json");
        }
    }
}

By encapsulating this logic in an editor script, you ensure that every developer and build machine produces identical, compliant artifacts every time. This consistency is the foundation for successfully passing automated submission checks on storefront backends.

Key Takeaway: Automating your build artifacts transforms your distribution process from a manual, error-prone task into a repeatable, compliant pipeline that guarantees your game meets all storefront technical specifications.