From 2545fea2688788bf9b780c7878e28cc1d37fdbf8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Fi=C5=A1era?= <mara@neptuo.com>
Date: Mon, 17 Apr 2023 14:25:40 +0200
Subject: [PATCH] Fix after merge with main

---
 src/StaticWebAssetsSdk/Tasks/FileHasher.cs    | 35 +++++++++++++++++++
 ...osoft.NET.Sdk.StaticWebAssets.Tasks.csproj |  3 --
 .../Tasks/ResolveCompressedAssets.cs          |  1 -
 3 files changed, 35 insertions(+), 4 deletions(-)
 create mode 100644 src/StaticWebAssetsSdk/Tasks/FileHasher.cs

diff --git a/src/StaticWebAssetsSdk/Tasks/FileHasher.cs b/src/StaticWebAssetsSdk/Tasks/FileHasher.cs
new file mode 100644
index 000000000000..7288e33ad28f
--- /dev/null
+++ b/src/StaticWebAssetsSdk/Tasks/FileHasher.cs
@@ -0,0 +1,35 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Numerics;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Microsoft.AspNetCore.StaticWebAssets.Tasks;
+
+public static class FileHasher
+{
+    public static string GetFileHash(string filePath)
+    {
+        using var hash = SHA256.Create();
+        var bytes = Encoding.UTF8.GetBytes(filePath);
+        var hashBytes = hash.ComputeHash(bytes);
+        return ToBase36(hashBytes);
+    }
+
+    private static string ToBase36(byte[] hash)
+    {
+        const string chars = "0123456789abcdefghijklmnopqrstuvwxyz";
+
+        var result = new char[10];
+        var dividend = BigInteger.Abs(new BigInteger(hash.AsSpan().Slice(0, 9).ToArray()));
+        for (var i = 0; i < 10; i++)
+        {
+            dividend = BigInteger.DivRem(dividend, 36, out var remainder);
+            result[i] = chars[(int)remainder];
+        }
+
+        return new string(result);
+    }
+}
diff --git a/src/StaticWebAssetsSdk/Tasks/Microsoft.NET.Sdk.StaticWebAssets.Tasks.csproj b/src/StaticWebAssetsSdk/Tasks/Microsoft.NET.Sdk.StaticWebAssets.Tasks.csproj
index 8fe086a4e209..e8541a00012b 100644
--- a/src/StaticWebAssetsSdk/Tasks/Microsoft.NET.Sdk.StaticWebAssets.Tasks.csproj
+++ b/src/StaticWebAssetsSdk/Tasks/Microsoft.NET.Sdk.StaticWebAssets.Tasks.csproj
@@ -63,9 +63,6 @@
     <Compile Include="..\..\RazorSdk\Tasks\DotnetToolTask.cs">
       <Link>Shared\DotnetToolTask.cs</Link>
     </Compile>
-    <Compile Include="..\..\WasmSdk\Tasks\FileHasher.cs">
-      <Link>Shared\FileHasher.cs</Link>
-    </Compile>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/StaticWebAssetsSdk/Tasks/ResolveCompressedAssets.cs b/src/StaticWebAssetsSdk/Tasks/ResolveCompressedAssets.cs
index e8c3e695c519..08f3cfeaf687 100644
--- a/src/StaticWebAssetsSdk/Tasks/ResolveCompressedAssets.cs
+++ b/src/StaticWebAssetsSdk/Tasks/ResolveCompressedAssets.cs
@@ -8,7 +8,6 @@
 using Microsoft.Build.Framework;
 using Microsoft.Build.Utilities;
 using Microsoft.Extensions.FileSystemGlobbing;
-using Microsoft.NET.Sdk.WebAssembly;
 
 namespace Microsoft.AspNetCore.StaticWebAssets.Tasks;