Run default addressables build conditionally (#231)

* Add asmdef and Addressable content build in the builder

* Move asmdef content into its own directory

* Mark UnityBuilderAction as Editor-only

dist/default-build-script/Assets/Editor/UnityBuilderAction/Builder.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityBuilderAction.Input;
+using UnityBuilderAction.Reporting;
+using UnityBuilderAction.Versioning;
+using UnityEditor;
+using UnityEditor.Build.Reporting;
+
+#if USE_ADDRESSABLES
+using UnityEditor.AddressableAssets.Settings;
+#endif
+
+namespace UnityBuilderAction
+{
+  static class Builder
+  {
+    public static void BuildProject()
+    {
+      // Gather values from args
+      var options = ArgumentsParser.GetValidatedOptions();
+
+      // Gather values from project
+      var scenes = EditorBuildSettings.scenes.Where(scene => scene.enabled).Select(s => s.path).ToArray();
+      
+      // Get all buildOptions from options
+      BuildOptions buildOptions = BuildOptions.None;
+      foreach (string buildOptionString in Enum.GetNames(typeof(BuildOptions))) {
+        if (options.ContainsKey(buildOptionString)) {
+          BuildOptions buildOptionEnum = (BuildOptions) Enum.Parse(typeof(BuildOptions), buildOptionString);
+          buildOptions |= buildOptionEnum;
+        }
+      }
+
+      // Define BuildPlayer Options
+      var buildPlayerOptions = new BuildPlayerOptions {
+        scenes = scenes,
+        locationPathName = options["customBuildPath"],
+        target = (BuildTarget) Enum.Parse(typeof(BuildTarget), options["buildTarget"]),
+        options = buildOptions
+      };
+
+      // Set version for this build
+      VersionApplicator.SetVersion(options["buildVersion"]);
+      VersionApplicator.SetAndroidVersionCode(options["androidVersionCode"]);
+      
+      // Apply Android settings
+      if (buildPlayerOptions.target == BuildTarget.Android)
+        AndroidSettings.Apply(options);
+
+      // Execute default AddressableAsset content build, if the package is installed
+#if USE_ADDRESSABLES
+      AddressableAssetSettings.CleanPlayerContent();
+      AddressableAssetSettings.BuildPlayerContent();
+#endif
+
+      // Perform build
+      BuildReport buildReport = BuildPipeline.BuildPlayer(buildPlayerOptions);
+
+      // Summary
+      BuildSummary summary = buildReport.summary;
+      StdOutReporter.ReportSummary(summary);
+
+      // Result
+      BuildResult result = summary.result;
+      StdOutReporter.ExitWithResult(result);
+    }
+  }
+}