Continuous Integration for Unity with CircleCI - Sample File

BuildCommand.cs

using UnityEditor;
using System.Linq;
using System;
static class BuildCommand
{
	static string GetArgument (string name)
	{
		string[] args = Environment.GetCommandLineArgs ();
		for (int i = 0; i < args.Length; i++) {
			if (args [i].Contains (name)) {
				return args [i + 1];
			}
		}
		return null;
	}
	static string[] GetEnabledScenes ()
	{
		return (
		    from scene in EditorBuildSettings.scenes
		 	where scene.enabled
		 	where !string.IsNullOrEmpty(scene.path)
		 	select scene.path
		).ToArray ();
	}
	static BuildTarget GetBuildTarget ()
	{
		string buildTargetName = GetArgument ("customBuildTarget");
		Console.WriteLine (":: Received customBuildTarget " + buildTargetName);
		if (buildTargetName.ToLower () == "android") {
			#if !UNITY_5_6_OR_NEWER
			// <https://issuetracker.unity3d.com/issues/buildoptions-dot-acceptexternalmodificationstoplayer-causes-unityexception-unknown-project-type-0>
			// Fixed in Unity 5.6.0
			// side effect to fix android build system:
			EditorUserBuildSettings.androidBuildSystem = AndroidBuildSystem.Internal;
			#endif
		}
		return ToEnum<BuildTarget> (buildTargetName, BuildTarget.NoTarget);
	}
	static string GetBuildPath ()
	{
		string buildPath = GetArgument ("customBuildPath");
		Console.WriteLine (":: Received customBuildPath " + buildPath);
		if (buildPath == "") {
			throw new Exception ("customBuildPath argument is missing");
		}
		return buildPath;
	}
	static string GetBuildName ()
	{
		string buildName = GetArgument ("customBuildName");
		Console.WriteLine (":: Received customBuildName " + buildName);
		if (buildName == "") {
			throw new Exception ("customBuildName argument is missing");
		}
		return buildName;
	}
	static string GetFixedBuildPath (BuildTarget buildTarget, string buildPath, string buildName) {
		if (buildTarget.ToString().ToLower().Contains("windows")) {
			buildName = buildName + ".exe";
		} else if (buildTarget.ToString().ToLower().Contains("webgl")) {
			// webgl produces a folder with index.html inside, there is no executable name for this buildTarget
			buildName = "";
		}
		return buildPath + buildName;
	}
	static BuildOptions GetBuildOptions ()
	{
		string buildOptions = GetArgument ("customBuildOptions");
		return buildOptions == "AcceptExternalModificationsToPlayer" ? BuildOptions.AcceptExternalModificationsToPlayer : BuildOptions.None;
	}
	// <https://stackoverflow.com/questions/1082532/how-to-tryparse-for-enum-value>
	static TEnum ToEnum<TEnum> (this string strEnumValue, TEnum defaultValue)
	{
		if (!Enum.IsDefined (typeof(TEnum), strEnumValue)) {
			return defaultValue;
		}
		return (TEnum)Enum.Parse (typeof(TEnum), strEnumValue);
	}
	static string getEnv (string key, bool secret = false, bool verbose = true)
	{
		var env_var = Environment.GetEnvironmentVariable (key);
		if (verbose) {
			if (env_var != null) {
				if (secret) {
					Console.WriteLine (":: env['" + key + "'] set");
				} else {
					Console.WriteLine (":: env['" + key + "'] set to '" + env_var + "'");
				}
			} else {
				Console.WriteLine (":: env['" + key + "'] is null");
			}
		}
		return env_var;
	}
	static void PerformBuild ()
	{
		Console.WriteLine (":: Performing build");
		//PlayerSettings.keystorePass = getEnv ("KEYSTORE_PASS", true);
		//PlayerSettings.keyaliasPass = getEnv ("KEY_ALIAS_PASS", true);
		//EditorSetup.AndroidSdkRoot = getEnv ("ANDROID_SDK_HOME");
		//EditorSetup.JdkRoot = getEnv ("JAVA_HOME");
		//EditorSetup.AndroidNdkRoot = getEnv ("ANDROID_NDK_HOME");
		var buildTarget = GetBuildTarget ();
		var buildPath = GetBuildPath ();
		var buildName = GetBuildName ();
		var fixedBuildPath = GetFixedBuildPath (buildTarget, buildPath, buildName);
		BuildPipeline.BuildPlayer (GetEnabledScenes (), fixedBuildPath, buildTarget, GetBuildOptions ());
		Console.WriteLine (":: Done with build");
	}
}