Allow rzls to launch using standard dotnet (Redo)

- Updates where to pick up dotnet.exe.
- Contributes to making rzls move away from being self-contained.
- Unifies how roslyn and razor servers acquire dotnet path/env variables.
- Picks up leftover changes from #5855 into main

src/lsptoolshost/dotnetRuntimeExtensionResolver.ts

@@ -9,7 +9,7 @@ import * as semver from 'semver';
 import { HostExecutableInformation } from '../shared/constants/hostExecutableInformation';
 import { IHostExecutableResolver } from '../shared/constants/IHostExecutableResolver';
 import { PlatformInformation } from '../shared/platform';
-import { commonOptions } from '../shared/options';
+import { commonOptions, languageServerOptions } from '../shared/options';
 import { existsSync } from 'fs';
 import { CSharpExtensionId } from '../constants/csharpExtensionId';
 import { getDotnetInfo } from '../shared/utils/getDotnetInfo';
@@ -67,6 +67,25 @@ export class DotnetRuntimeExtensionResolver implements IHostExecutableResolver {
             throw new Error(`Cannot find dotnet path '${dotnetExecutablePath}'`);
         }
 
+        // Take care to always run .NET processes on the runtime that we intend.
+        // The dotnet.exe we point to should not go looking for other runtimes.
+        const env: NodeJS.ProcessEnv = { ...process.env };
+        env.DOTNET_ROOT = path.dirname(dotnetExecutablePath);
+        env.DOTNET_MULTILEVEL_LOOKUP = '0';
+        // Save user's DOTNET_ROOT env-var value so server can recover the user setting when needed
+        env.DOTNET_ROOT_USER = process.env.DOTNET_ROOT ?? 'EMPTY';
+
+        if (languageServerOptions.crashDumpPath) {
+            // Enable dump collection
+            env.DOTNET_DbgEnableMiniDump = '1';
+            // Collect heap dump
+            env.DOTNET_DbgMiniDumpType = '2';
+            // Collect crashreport.json with additional thread and stack frame information.
+            env.DOTNET_EnableCrashReport = '1';
+            // The dump file name format is <executable>.<pid>.dmp
+            env.DOTNET_DbgMiniDumpName = path.join(languageServerOptions.crashDumpPath, '%e.%p.dmp');
+        }
+
         return {
             version: '' /* We don't need to know the version - we've already downloaded the correct one */,
             path: dotnetExecutablePath,

src/lsptoolshost/roslynLanguageServer.ts

@@ -491,30 +491,10 @@ export class RoslynLanguageServer {
         const serverPath = getServerPath(platformInfo);
 
         const dotnetInfo = await hostExecutableResolver.getHostExecutableInfo();
-        const dotnetRuntimePath = path.dirname(dotnetInfo.path);
         const dotnetExecutablePath = dotnetInfo.path;
 
         _channel.appendLine('Dotnet path: ' + dotnetExecutablePath);
 
-        // Take care to always run .NET processes on the runtime that we intend.
-        // The dotnet.exe we point to should not go looking for other runtimes.
-        const env: NodeJS.ProcessEnv = { ...process.env };
-        env.DOTNET_ROOT = dotnetRuntimePath;
-        env.DOTNET_MULTILEVEL_LOOKUP = '0';
-        // Save user's DOTNET_ROOT env-var value so server can recover the user setting when needed
-        env.DOTNET_ROOT_USER = process.env.DOTNET_ROOT ?? 'EMPTY';
-
-        if (languageServerOptions.crashDumpPath) {
-            // Enable dump collection
-            env.DOTNET_DbgEnableMiniDump = '1';
-            // Collect heap dump
-            env.DOTNET_DbgMiniDumpType = '2';
-            // Collect crashreport.json with additional thread and stack frame information.
-            env.DOTNET_EnableCrashReport = '1';
-            // The dump file name format is <executable>.<pid>.dmp
-            env.DOTNET_DbgMiniDumpName = path.join(languageServerOptions.crashDumpPath, '%e.%p.dmp');
-        }
-
         let args: string[] = [];
 
         if (commonOptions.waitForDebugger) {
@@ -557,7 +537,7 @@ export class RoslynLanguageServer {
             const csharpDevKitArgs = this.getCSharpDevKitExportArgs();
             args = args.concat(csharpDevKitArgs);
 
-            await this.setupDevKitEnvironment(env, csharpDevkitExtension);
+            await this.setupDevKitEnvironment(dotnetInfo.env, csharpDevkitExtension);
         } else {
             // C# Dev Kit is not installed - continue C#-only activation.
             _channel.appendLine('Activating C# standalone...');
@@ -580,7 +560,7 @@ export class RoslynLanguageServer {
         const cpOptions: cp.SpawnOptionsWithoutStdio = {
             detached: true,
             windowsHide: true,
-            env: env,
+            env: dotnetInfo.env,
         };
 
         if (serverPath.endsWith('.dll')) {

src/razor/src/extension.ts

@@ -90,20 +90,11 @@ export async function activate(
         );
 
         const dotnetInfo = await hostExecutableResolver.getHostExecutableInfo();
-        const dotnetRuntimePath = path.dirname(dotnetInfo.path);
-
-        // Take care to always run .NET processes on the runtime that we intend.
-        // The dotnet.exe we point to should not go looking for other runtimes.
-        const env: NodeJS.ProcessEnv = { ...process.env };
-        env.DOTNET_ROOT = dotnetRuntimePath;
-        env.DOTNET_MULTILEVEL_LOOKUP = '0';
-        // Save user's DOTNET_ROOT env-var value so server can recover the user setting when needed
-        env.DOTNET_ROOT_USER = process.env.DOTNET_ROOT ?? 'EMPTY';
 
         let telemetryExtensionDllPath = '';
         // Set up DevKit environment for telemetry
         if (csharpDevkitExtension) {
-            await setupDevKitEnvironment(env, csharpDevkitExtension, logger);
+            await setupDevKitEnvironment(dotnetInfo.env, csharpDevkitExtension, logger);
 
             const telemetryExtensionPath = path.join(
                 util.getExtensionPath(),
@@ -121,7 +112,7 @@ export async function activate(
             razorTelemetryReporter,
             vscodeTelemetryReporter,
             telemetryExtensionDllPath,
-            env,
+            dotnetInfo.env,
             dotnetInfo.path,
             logger
         );

src/razor/src/razorLanguageServerOptionsResolver.ts

@@ -7,7 +7,6 @@ import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
 import * as vscodeAdapter from './vscodeAdapter';
-import * as vscode from 'vscode';
 import { RazorLanguageServerOptions } from './razorLanguageServerOptions';
 import { RazorLogger } from './razorLogger';
 import { LogLevel } from './logLevel';
@@ -35,23 +34,17 @@ export function resolveRazorLanguageServerOptions(
 }
 
 function findLanguageServerExecutable(withinDir: string) {
-    const extension = isWindows() ? '.exe' : '';
-    const executablePath = path.join(withinDir, `rzls${extension}`);
+    const isSelfContained = fs.existsSync(path.join(withinDir, 'coreclr.dll'));
     let fullPath = '';
-
-    if (fs.existsSync(executablePath)) {
-        fullPath = executablePath;
+    if (isSelfContained) {
+        const fileName = isWindows() ? 'rzls.exe' : 'rzls';
+        fullPath = path.join(withinDir, fileName);
     } else {
-        // Exe doesn't exist.
-        const dllPath = path.join(withinDir, 'rzls.dll');
-
-        if (!fs.existsSync(dllPath)) {
-            throw new Error(
-                vscode.l10n.t("Could not find Razor Language Server executable within directory '{0}'", withinDir)
-            );
-        }
+        fullPath = path.join(withinDir, 'rzls.dll');
+    }
 
-        fullPath = dllPath;
+    if (!fs.existsSync(fullPath)) {
+        throw new Error(`Could not find Razor Language Server executable within directory '${withinDir}'`);
     }
 
     return fullPath;