feat(amazonq): enable show logs (aws#7733)

## Problem
We needed a solution to 1 click access the logs on the disk. 

## Solution
Implemented a button for it. And also wired the related language server
changes for this.

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: abhraina-aws

packages/amazonq/src/extension.ts

@@ -45,7 +45,6 @@ import { registerCommands } from './commands'
 import { focusAmazonQPanel } from 'aws-core-vscode/codewhispererChat'
 import { activate as activateAmazonqLsp } from './lsp/activation'
 import { hasGlibcPatch } from './lsp/client'
-import { RotatingLogChannel } from './lsp/rotatingLogChannel'
 
 export const amazonQContextPrefix = 'amazonq'
 
@@ -104,12 +103,7 @@ export async function activateAmazonQCommon(context: vscode.ExtensionContext, is
     globals.manifestPaths.endpoints = context.asAbsolutePath(join('resources', 'endpoints.json'))
     globals.regionProvider = RegionProvider.fromEndpointsProvider(makeEndpointsProvider())
 
-    // Create rotating log channel for all Amazon Q logs
-    const qLogChannel = new RotatingLogChannel(
-        'Amazon Q Logs',
-        context,
-        vscode.window.createOutputChannel('Amazon Q Logs', { log: true })
-    )
+    const qLogChannel = vscode.window.createOutputChannel('Amazon Q Logs', { log: true })
     await activateLogger(context, amazonQContextPrefix, qLogChannel)
     globals.logOutputChannel = qLogChannel
     globals.loginManager = new LoginManager(globals.awsContext, new CredentialsStore())
@@ -118,8 +112,6 @@ export async function activateAmazonQCommon(context: vscode.ExtensionContext, is
         getLogger().error('fs.init: invalid env vars found: %O', homeDirLogs)
     }
 
-    getLogger().info('Rotating logger has been setup')
-
     await activateTelemetry(context, globals.awsContext, Settings.instance, 'Amazon Q For VS Code')
 
     await initializeAuth(globals.loginManager)

packages/amazonq/src/lsp/chat/messages.ts

@@ -81,7 +81,14 @@ import {
     SecurityIssueTreeViewProvider,
     CodeWhispererConstants,
 } from 'aws-core-vscode/codewhisperer'
-import { amazonQDiffScheme, AmazonQPromptSettings, messages, openUrl, isTextEditor } from 'aws-core-vscode/shared'
+import {
+    amazonQDiffScheme,
+    AmazonQPromptSettings,
+    messages,
+    openUrl,
+    isTextEditor,
+    globals,
+} from 'aws-core-vscode/shared'
 import {
     DefaultAmazonQAppInitContext,
     messageDispatcher,
@@ -429,6 +436,38 @@ export function registerMessageListeners(
             case listMcpServersRequestType.method:
             case mcpServerClickRequestType.method:
             case tabBarActionRequestType.method:
+                // handling for show_logs button
+                if (message.params.action === 'show_logs') {
+                    languageClient.info('[VSCode Client] Received show_logs action, showing disclaimer')
+
+                    // Show warning message without buttons - just informational
+                    void vscode.window.showWarningMessage(
+                        'Log files may contain sensitive information such as account IDs, resource names, and other data. Be careful when sharing these logs.'
+                    )
+
+                    // Get the log directory path
+                    const logPath = globals.context.logUri?.fsPath
+                    const result = { ...message.params, success: false }
+
+                    if (logPath) {
+                        // Open the log directory in the OS file explorer directly
+                        languageClient.info('[VSCode Client] Opening logs directory')
+                        await vscode.commands.executeCommand('revealFileInOS', vscode.Uri.file(logPath))
+                        result.success = true
+                    } else {
+                        // Fallback: show error if log path is not available
+                        void vscode.window.showErrorMessage('Log location not available.')
+                        languageClient.error('[VSCode Client] Log location not available')
+                    }
+
+                    void webview?.postMessage({
+                        command: message.command,
+                        params: result,
+                    })
+
+                    break
+                }
+            // eslint-disable-next-line no-fallthrough
             case listAvailableModelsRequestType.method:
                 await resolveChatResponse(message.command, message.params, languageClient, webview)
                 break

packages/amazonq/src/lsp/client.ts

@@ -8,7 +8,6 @@ import * as nls from 'vscode-nls'
 import { LanguageClient, LanguageClientOptions, RequestType, State } from 'vscode-languageclient'
 import { InlineCompletionManager } from '../app/inline/completion'
 import { AmazonQLspAuth, encryptionKey, notificationTypes } from './auth'
-import { RotatingLogChannel } from './rotatingLogChannel'
 import {
     CreateFilesParams,
     DeleteFilesParams,
@@ -95,23 +94,6 @@ export async function startLanguageServer(
 
     const clientId = 'amazonq'
     const traceServerEnabled = Settings.instance.isSet(`${clientId}.trace.server`)
-
-    // Create custom output channel that writes to disk but sends UI output to the appropriate channel
-    const lspLogChannel = new RotatingLogChannel(
-        traceServerEnabled ? 'Amazon Q Language Server' : 'Amazon Q Logs',
-        extensionContext,
-        traceServerEnabled
-            ? vscode.window.createOutputChannel('Amazon Q Language Server', { log: true })
-            : globals.logOutputChannel
-    )
-
-    // Add cleanup for our file output channel
-    toDispose.push({
-        dispose: () => {
-            lspLogChannel.dispose()
-        },
-    })
-
     let executable: string[] = []
     // apply the GLIBC 2.28 path to node js runtime binary
     if (isSageMaker()) {
@@ -191,6 +173,7 @@ export async function startLanguageServer(
                     window: {
                         notifications: true,
                         showSaveFileDialog: true,
+                        showLogs: true,
                     },
                     textDocument: {
                         inlineCompletionWithReferences: {
@@ -209,9 +192,15 @@ export async function startLanguageServer(
             },
         },
         /**
-         * Using our RotatingLogger for all logs
+         * When the trace server is enabled it outputs a ton of log messages so:
+         *   When trace server is enabled, logs go to a seperate "Amazon Q Language Server" output.
+         *   Otherwise, logs go to the regular "Amazon Q Logs" channel.
          */
-        outputChannel: lspLogChannel,
+        ...(traceServerEnabled
+            ? {}
+            : {
+                  outputChannel: globals.logOutputChannel,
+              }),
     }
 
     const client = new LanguageClient(