create a variant importer

Author: z3y

Editor/Importer/GraphlitImporter.cs

@@ -64,7 +64,7 @@ public override void OnImportAsset(AssetImportContext ctx)
 
         }
 
-        private static void GenerateShaderVariant(AssetImportContext ctx, BuildTarget target, ShaderGraphView graphView, int id)
+        public static void GenerateShaderVariant(AssetImportContext ctx, BuildTarget target, ShaderGraphView graphView, int id)
         {
             var shaderNodes = graphView.cachedNodesForBuilder;
             var dependencies = new HashSet<string>();

Editor/Importer/VariantImporter.cs

@@ -0,0 +1,54 @@
+using System.IO;
+using UnityEditor;
+using UnityEditor.AssetImporters;
+using UnityEngine;
+using static Graphlit.GraphData;
+
+namespace Graphlit
+{
+    [ScriptedImporter(1, new[] { "graphlitvariant" }, -1)]
+    public class VariantImporter : ScriptedImporter
+    {
+        [SerializeField] public string graphRelativePath = "";
+        [SerializeField] public string nameSuffix = "Variant";
+        [SerializeField] public OutlinePassMode outlinePass = OutlinePassMode.Disabled;
+        [SerializeField] public bool depthFillPass = false;
+
+        internal void OverrideVariantData(GraphData data)
+        {
+            data.shaderName += " " + nameSuffix;
+            data.outlinePass = outlinePass;
+            data.depthFillPass = depthFillPass;
+        }
+
+        public override void OnImportAsset(AssetImportContext ctx)
+        {
+            var target = ctx.selectedBuildTarget;
+
+            string assetPath = "Packages/com.z3y.graphlit/Shaders/Unlit.graphlit";
+
+            if (!string.IsNullOrEmpty(graphRelativePath))
+            {
+                var dir = Path.GetDirectoryName(ctx.assetPath);
+                assetPath = Path.Combine(dir, graphRelativePath) + ".graphlit";
+            }
+            string guid = AssetDatabase.AssetPathToGUID(assetPath);
+
+            var data = GraphlitImporter.ReadGraphData(guid);
+            OverrideVariantData(data.data);
+            data.data.unlocked = false;
+            var graphView = new ShaderGraphView(null, assetPath);
+            data.PopulateGraph(graphView);
+
+            graphView.UpdateCachedNodesForBuilder();
+
+            GraphlitImporter.GenerateShaderVariant(ctx, target, graphView, 0);
+        }
+
+        [MenuItem("Assets/Create/Graphlit/Variant")]
+        public static void CreateVariantFile()
+        {
+            ProjectWindowUtil.CreateAssetWithContent($"Graphlit Variant.graphlitvariant", "");
+        }
+    }
+}