Update LW master nodes to work with latest SRP repo

com.unity.shadergraph/Editor/Data/Nodes/MasterNode.cs

             foreach (var subShader in m_SubShaders)
                 finalShader.AddShaderChunk(subShader.GetSubshader(this, mode), true);
 
+            finalShader.AddShaderChunk(@"FallBack ""Hidden/InternalErrorShader""", false);
             finalShader.Deindent();
             finalShader.AddShaderChunk("}", false);
 

com.unity.shadergraph/Editor/Data/Util/ShaderGenerator.cs

         {
             var path = new List<string>
             {
-                Application.dataPath,
-                "ShaderGraph",
-                "com.unity.shadergraph",
+                DefaultShaderIncludes.GetAssetsPackagePath() ?? Path.GetFullPath("Packages/com.unity.shadergraph"),
                 "Editor",
                 "Templates"
             };
 
             if (File.Exists(result))
                 return result;
-
-
-            //todo: fix this up... quick hack for working
-            // in a package
-            var path2 = new List<string>
-            {
-                "Packages",
-                "com.unity.shadergraph",
-                "Editor",
-                "Templates"
-            };
-
-            string result2 = path2[0];
-            for (int i = 1; i < path2.Count; i++)
-                result2 = Path.Combine(result2, path2[i]);
-
-            result2 = Path.Combine(result2, templateName);
-            result2 = Path.GetFullPath(result2);
-
-            if (File.Exists(result2))
-                return result2;
 
             return string.Empty;
         }

com.unity.shadergraph/Editor/Importers/ShaderGraphImporter.cs

 using UnityEditor.Experimental.AssetImporters;
 using UnityEditor.ShaderGraph.Drawing;
 
-[ScriptedImporter(11, ShaderGraphImporter.ShaderGraphExtension)]
+[ScriptedImporter(12, ShaderGraphImporter.ShaderGraphExtension)]
 public class ShaderGraphImporter : ScriptedImporter
 {
     public const string ShaderGraphExtension = "shadergraph";

com.unity.shadergraph/Editor/Templates/lightweightPBRExtraPasses.template

 {
     Tags{"LightMode" = "ShadowCaster"}
 
-    ZWrite On ZTest LEqual
+    ZWrite On
+    ZTest LEqual
-
+    
-    #pragma fragment ShadowPassFragment
+    #pragma fragment LitPassFragmentNull
 
     #include "LWRP/ShaderLibrary/LightweightPassShadow.hlsl"
     ENDHLSL
     // Required to compile gles 2.0 with standard srp library
     #pragma prefer_hlslcc gles
     #pragma target 2.0
-    #pragma vertex vert
-    #pragma fragment frag
-
-    #include "LWRP/ShaderLibrary/Core.hlsl"
+    
+    //--------------------------------------
+    // GPU Instancing
+    #pragma multi_compile_instancing
-    float4 vert(float4 pos : POSITION) : SV_POSITION
-    {
-        return TransformObjectToHClip(pos.xyz);
-    }
+    #pragma vertex LitPassVertex
+    #pragma fragment LitPassFragmentNull
-    half4 frag() : SV_TARGET
-    {
-        return 0;
-    }
+    #include "LWRP/ShaderLibrary/LightweightPassLit.hlsl"
     ENDHLSL
 }
 

com.unity.shadergraph/Editor/Templates/lightweightPBRForwardPass.template

     #pragma prefer_hlslcc gles
 	#pragma target 3.0
 
-    // -------------------------------------
-    // Lightweight Pipeline keywords
-    // We have no good approach exposed to skip shader variants, e.g, ideally we would like to skip _CASCADE for all puctual lights
-    // Lightweight combines light classification and shadows keywords to reduce shader variants.
-    // Lightweight shader library declares defines based on these keywords to avoid having to check them in the shaders
-    // Core.hlsl defines _MAIN_LIGHT_DIRECTIONAL and _MAIN_LIGHT_SPOT (point lights can't be main light)
-    // Shadow.hlsl defines _SHADOWS_ENABLED, _SHADOWS_SOFT, _SHADOWS_CASCADE, _SHADOWS_PERSPECTIVE
-    #pragma multi_compile _ _MAIN_LIGHT_DIRECTIONAL_SHADOW _MAIN_LIGHT_DIRECTIONAL_SHADOW_CASCADE _MAIN_LIGHT_DIRECTIONAL_SHADOW_SOFT _MAIN_LIGHT_DIRECTIONAL_SHADOW_CASCADE_SOFT _MAIN_LIGHT_SPOT_SHADOW _MAIN_LIGHT_SPOT_SHADOW_SOFT
-    #pragma multi_compile _ _MAIN_LIGHT_COOKIE
-    #pragma multi_compile _ _ADDITIONAL_LIGHTS
-    #pragma multi_compile _ _VERTEX_LIGHTS
-    #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
-    #pragma multi_compile _ FOG_LINEAR FOG_EXP2
+	// -------------------------------------
+	// Lightweight Pipeline keywords
+	#pragma multi_compile _ _ADDITIONAL_LIGHTS
+	#pragma multi_compile _ _VERTEX_LIGHTS
+	#pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
+	#pragma multi_compile _ FOG_LINEAR FOG_EXP2
-    // -------------------------------------
-    // Unity defined keywords
-    #pragma multi_compile _ UNITY_SINGLE_PASS_STEREO STEREO_INSTANCING_ON STEREO_MULTIVIEW_ON
-    #pragma multi_compile _ DIRLIGHTMAP_COMBINED LIGHTMAP_ON
-
-    //--------------------------------------
-    // GPU Instancing
-    #pragma multi_compile_instancing
+	// -------------------------------------
+	// Unity defined keywords
+	#pragma multi_compile _ DIRLIGHTMAP_COMBINED
+	#pragma multi_compile _ LIGHTMAP_ON
-    // LW doesn't support dynamic GI. So we save 30% shader variants if we assume
-    // LIGHTMAP_ON when DIRLIGHTMAP_COMBINED is set
-    #ifdef DIRLIGHTMAP_COMBINED
-    #define LIGHTMAP_ON
-    #endif
+	//--------------------------------------
+	// GPU Instancing
+	#pragma multi_compile_instancing
 
     #pragma vertex vert
 	#pragma fragment frag
 	    o.fogFactorAndVertexLight = half4(fogFactor, vertexLight);
 	    o.clipPos = clipPos;
 
-#if defined(_SHADOWS_ENABLED) && !defined(_SHADOWS_CASCADE)
-	    o.shadowCoord = ComputeShadowCoord(lwWorldPos);
-#else
-		o.shadowCoord = float4(0, 0, 0, 0);
-#endif
-
+	    o.shadowCoord = ComputeShadowCoord(o.clipPos);
 		return o;
 	}
 
 	    inputData.viewDirectionWS = normalize(WorldSpaceViewDirection);
 #endif
 
-#ifdef _SHADOWS_ENABLED
-#else
-	    inputData.shadowCoord = float4(0, 0, 0, 0);
-#endif
 
 	    inputData.fogCoord = IN.fogFactorAndVertexLight.x;
 	    inputData.vertexLighting = IN.fogFactorAndVertexLight.yzw;

com.unity.shadergraph/Editor/Templates/lightweightUnlitExtraPasses.template

 {
     Tags{"LightMode" = "ShadowCaster"}
 
-    ZWrite On ZTest LEqual
+    ZWrite On
+    ZTest LEqual
-
+    
-    #pragma fragment ShadowPassFragment
+    #pragma fragment LitPassFragmentNull
 
     #include "LWRP/ShaderLibrary/LightweightPassShadow.hlsl"
     ENDHLSL
     // Required to compile gles 2.0 with standard srp library
     #pragma prefer_hlslcc gles
     #pragma target 2.0
-    #pragma vertex vert
-    #pragma fragment frag
-
-    #include "LWRP/ShaderLibrary/Core.hlsl"
+    
+    //--------------------------------------
+    // GPU Instancing
+    #pragma multi_compile_instancing
-    float4 vert(float4 pos : POSITION) : SV_POSITION
-    {
-        return TransformObjectToHClip(pos.xyz);
-    }
+    #pragma vertex LitPassVertex
+    #pragma fragment LitPassFragmentNull
-    half4 frag() : SV_TARGET
-    {
-        return 0;
-    }
+    #include "LWRP/ShaderLibrary/LightweightPassLit.hlsl"
     ENDHLSL
 }

com.unity.shadergraph/Editor/Templates/shader.template

 	
 ${SubShader}
 
-	FallBack "Diffuse"
-	CustomEditor "LegacyIlluminShaderGUI"
+    FallBack "Hidden/InternalErrorShader"
 }