Add VRChat and GitHub packages to Unity project

Packages/com.vrchat.vrcsdk3/Editor.meta

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+fileFormatVersion: 2
+guid: bb5768ae4d251fa4d87b092a2e6e422e
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.vrchat.vrcsdk3/Editor/UPMImporter.meta

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+fileFormatVersion: 2
+guid: 7adf8ee48f4d3904c87375f59aafa513
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.vrchat.vrcsdk3/Editor/UPMImporter/UPMImporter.cs

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+using System.IO;
+using System.Linq;
+using UnityEditor;
+using UnityEditor.PackageManager;
+using UnityEditor.PackageManager.Requests;
+using UnityEngine;
+
+namespace VRC.Udon.Editor {
+    [InitializeOnLoad]
+    public class UPMImporter
+    {
+        // Add packages here to auto-import
+        public static string[] requiredPackages =
+        {
+            "com.unity.cinemachine@2.6.3",
+            "com.unity.postprocessing@2.3.0",
+            "com.unity.textmeshpro@1.4.1",
+        };
+        
+        private static ListRequest list;
+        
+        static UPMImporter()
+        {
+            list = Client.List();
+            EditorApplication.update += Update;
+        }
+
+        public static void Update()
+        {
+            // Exit early if we're still gathering the list
+            if (!list.IsCompleted) return;
+            
+            // Unsubscribe from Update once the list is ready
+            EditorApplication.update -= Update;
+
+            var localPackages = list.Result;
+            bool importedNewPackage = false;
+            foreach (string packageName in requiredPackages)
+            {
+                var packageNameNoVersion = packageName.Substring(0, packageName.IndexOf('@'));
+                if(!localPackages.Any(p => p.name == packageNameNoVersion))
+                {
+                    Install(packageName);
+                    importedNewPackage = true;
+                }
+            }
+            
+            // if Unity tried to import SDK3 before required packages, it will have old errors showing.
+            if(importedNewPackage) ClearLog();
+        }
+
+        public static bool Install(string id)
+        {
+            var request = Client.Add(id);
+            while (!request.IsCompleted) {};
+            if(request.Error != null)Debug.LogError(request.Error.message);
+            return request.Error == null;
+        }
+        
+        public static void ClearLog()
+        {
+            System.Reflection.Assembly assembly = System.Reflection.Assembly.GetAssembly(typeof(SceneView));
+
+            System.Type type = assembly.GetType("UnityEditor.LogEntries");
+            System.Reflection.MethodInfo method = type.GetMethod("Clear");
+            method.Invoke(new object(), null);
+        }
+
+    }
+
+}

Packages/com.vrchat.vrcsdk3/Editor/UPMImporter/UPMImporter.cs.meta

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+fileFormatVersion: 2
+guid: 1056c67d11ce3ce41b80a979e05732c4
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.vrchat.vrcsdk3/Editor/UPMImporter/VRC.Udon.Editor.UPMImporter.asmdef

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+{
+    "name": "VRC.Udon.Editor.UPMImporter",
+    "references": [],
+    "optionalUnityReferences": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": []
+}

Packages/com.vrchat.vrcsdk3/Editor/UPMImporter/VRC.Udon.Editor.UPMImporter.asmdef.meta

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+fileFormatVersion: 2
+guid: 4704b64fff8057d49a97d061be599eea
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.vrchat.vrcsdk3/package.json

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+{
+	"name" : "com.vrchat.vrcsdk3",
+	"displayName" : "VRChat SDK3 - Worlds",
+	"version" : "2020.3.2",
+	"unity" : "2018.4",
+	"description" : "SDK 3 with Udon, our in-house node-based scripting language for awesome interactivity!"
+}

Packages/com.vrchat.vrcsdk3/package.json.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 6d4603f5cd56d5f4289993be967b5ef2
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/manifest.json

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+{
+  "dependencies": {
+    "com.unity.ads": "2.0.8",
+    "com.unity.analytics": "3.2.3",
+    "com.unity.cinemachine": "2.6.3",
+    "com.unity.collab-proxy": "1.2.15",
+    "com.unity.package-manager-ui": "2.0.8",
+    "com.unity.postprocessing": "2.3.0",
+    "com.unity.purchasing": "2.0.3",
+    "com.unity.textmeshpro": "1.4.1",
+    "com.unity.xr.oculus.standalone": "1.38.4",
+    "com.unity.xr.openvr.standalone": "1.0.5",
+    "com.unity.modules.ai": "1.0.0",
+    "com.unity.modules.animation": "1.0.0",
+    "com.unity.modules.assetbundle": "1.0.0",
+    "com.unity.modules.audio": "1.0.0",
+    "com.unity.modules.cloth": "1.0.0",
+    "com.unity.modules.director": "1.0.0",
+    "com.unity.modules.imageconversion": "1.0.0",
+    "com.unity.modules.imgui": "1.0.0",
+    "com.unity.modules.jsonserialize": "1.0.0",
+    "com.unity.modules.particlesystem": "1.0.0",
+    "com.unity.modules.physics": "1.0.0",
+    "com.unity.modules.physics2d": "1.0.0",
+    "com.unity.modules.screencapture": "1.0.0",
+    "com.unity.modules.terrain": "1.0.0",
+    "com.unity.modules.terrainphysics": "1.0.0",
+    "com.unity.modules.tilemap": "1.0.0",
+    "com.unity.modules.ui": "1.0.0",
+    "com.unity.modules.uielements": "1.0.0",
+    "com.unity.modules.umbra": "1.0.0",
+    "com.unity.modules.unityanalytics": "1.0.0",
+    "com.unity.modules.unitywebrequest": "1.0.0",
+    "com.unity.modules.unitywebrequestassetbundle": "1.0.0",
+    "com.unity.modules.unitywebrequestaudio": "1.0.0",
+    "com.unity.modules.unitywebrequesttexture": "1.0.0",
+    "com.unity.modules.unitywebrequestwww": "1.0.0",
+    "com.unity.modules.vehicles": "1.0.0",
+    "com.unity.modules.video": "1.0.0",
+    "com.unity.modules.vr": "1.0.0",
+    "com.unity.modules.wind": "1.0.0",
+    "com.unity.modules.xr": "1.0.0"
+  }
+}