Add tasks for running a new vscode instance with a specific language …

…server

Depends on dotnet/vscode-csharp#6316.

.vscode/tasks.json

@@ -119,6 +119,30 @@
         },
         "problemMatcher": "$msCompile",
         "group": "build"
+    },
+    {
+      "label": "build language server",
+      "command": "dotnet",
+      "type": "shell",
+      "args": [
+        "build",
+        "-c",
+        "Debug",
+        "src/Features/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/Microsoft.CodeAnalysis.LanguageServer.csproj"
+      ],
+      "problemMatcher": "$msCompile",
+      "group": "build"
+    },
+    {
+      "label": "launch vscode with language server",
+      "command": "${execPath}",
+      "type": "process",
+      "options": {
+        "env": {
+          "DOTNET_ROSLYN_LANGUAGE_SERVER": "${workspaceFolder}/artifacts/bin/Microsoft.CodeAnalysis.LanguageServer/net7.0/Microsoft.CodeAnalysis.LanguageServer.dll"
+        }
+      },
+      "dependsOn": [ "build language server" ]
     }
   ]
 }

docs/contributing/Building, Debugging, and Testing on Unix.md

@@ -15,6 +15,7 @@ Particularly for developers who aren't experienced with .NET Core development on
 2. Install the latest [.NET 8.0 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/8.0).
 3. You can build from VS Code by running the *Run Build Task* command, then selecting an appropriate task such as *build* or *build current project* (the latter builds the containing project for the current file you're viewing in the editor).
 4. You can run tests from VS Code by opening a test class in the editor, then using the *Run Tests in Context* and *Debug Tests in Context* editor commands. You may want to bind these commands to keyboard shortcuts that match their Visual Studio equivalents (**Ctrl+R, T** for *Run Tests in Context* and **Ctrl+R, Ctrl+T** for *Debug Tests in Context*).
+5. You can launch a new VS Code instance with the language server from your current code by running the "launch vscode with language server" task.
 
 ## Running Tests
 The unit tests can be executed by running `./build.sh --test`.