From c621c6bf2a003a3dab72d2ac08ec94ed7f031abf Mon Sep 17 00:00:00 2001
From: Konrad Malik <konrad.malik@gmail.com>
Date: Fri, 24 Jan 2025 13:43:30 +0100
Subject: [PATCH] roslyn-ls: fix read-only cache dir (#376364)

---
 pkgs/by-name/ro/roslyn-ls/cachedirectory.patch | 13 +++++++++++++
 pkgs/by-name/ro/roslyn-ls/package.nix          | 11 ++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)
 create mode 100644 pkgs/by-name/ro/roslyn-ls/cachedirectory.patch

diff --git a/pkgs/by-name/ro/roslyn-ls/cachedirectory.patch b/pkgs/by-name/ro/roslyn-ls/cachedirectory.patch
new file mode 100644
index 000000000000..23aec8aa8af1
--- /dev/null
+++ b/pkgs/by-name/ro/roslyn-ls/cachedirectory.patch
@@ -0,0 +1,13 @@
+diff --git a/src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/Program.cs b/src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/Program.cs
+index 5c80f55e9dd..17373f36ebf 100644
+--- a/src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/Program.cs
++++ b/src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/Program.cs
+@@ -97,7 +97,7 @@ static async Task RunAsync(ServerConfiguration serverConfiguration, Cancellation
+     var assemblyLoader = new CustomExportAssemblyLoader(extensionManager, loggerFactory);
+     var typeRefResolver = new ExtensionTypeRefResolver(assemblyLoader, loggerFactory);
+ 
+-    var cacheDirectory = Path.Combine(Path.GetDirectoryName(typeof(Program).Assembly.Location)!, "cache");
++    var cacheDirectory = Path.Combine(Environment.GetEnvironmentVariable("XDG_CACHE_HOME") ?? Path.Combine(Environment.GetEnvironmentVariable("HOME")!, ".cache"), "roslyn");
+ 
+     using var exportProvider = await ExportProviderBuilder.CreateExportProviderAsync(extensionManager, assemblyLoader, serverConfiguration.DevKitDependencyPath, cacheDirectory, loggerFactory);
+ 
diff --git a/pkgs/by-name/ro/roslyn-ls/package.nix b/pkgs/by-name/ro/roslyn-ls/package.nix
index 52fe26f065cd..6e01757f5149 100644
--- a/pkgs/by-name/ro/roslyn-ls/package.nix
+++ b/pkgs/by-name/ro/roslyn-ls/package.nix
@@ -50,9 +50,14 @@ buildDotnetModule rec {
 
   nativeBuildInputs = [ jq ];
 
-  # until upstream updates net6.0 here:
-  # https://github.com/dotnet/roslyn/blob/6cc106c0eaa9b0ae070dba3138a23aeab9b50c13/eng/targets/TargetFrameworks.props#L20
-  patches = [ ./force-sdk_8_0.patch ];
+  patches = [
+    # until upstream updates net6.0 here:
+    # https://github.com/dotnet/roslyn/blob/6cc106c0eaa9b0ae070dba3138a23aeab9b50c13/eng/targets/TargetFrameworks.props#L20
+    ./force-sdk_8_0.patch
+    # until made configurable/and or different location
+    # https://github.com/dotnet/roslyn/issues/76892
+    ./cachedirectory.patch
+  ];
 
   postPatch = ''
     # Upstream uses rollForward = latestPatch, which pins to an *exact* .NET SDK version.