disable task reconnection by default (microsoft#156217)

src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts

@@ -340,7 +340,7 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 			processContext.set(process && !isVirtual);
 		}
 		this._onDidRegisterSupportedExecutions.fire();
-		if (this._jsonTasksSupported && !this._tasksReconnected) {
+		if (this._configurationService.getValue(TaskSettingId.Reconnection) === true && this._jsonTasksSupported && !this._tasksReconnected) {
 			this._reconnectTasks();
 		}
 	}

src/vs/workbench/contrib/tasks/browser/task.contribution.ts

@@ -513,6 +513,12 @@ configurationRegistry.registerConfiguration({
 			description: nls.localize('task.showDecorations', "Shows decorations at points of interest in the terminal buffer such as the first problem found via a watch task. Note that this will only take effect for future tasks."),
 			default: true
 		},
+		[TaskSettingId.Reconnection]: {
+			type: 'boolean',
+			description: nls.localize('task.experimental.reconnection', "On window reload, reconnect to running watch/background tasks. Note that this is experimental, so you could encounter issues."),
+			default: false,
+			tags: ['experimental']
+		},
 		[TaskSettingId.SaveBeforeRun]: {
 			markdownDescription: nls.localize(
 				'task.saveBeforeRun',

src/vs/workbench/contrib/tasks/browser/terminalTaskSystem.ts

@@ -959,7 +959,6 @@ export class TerminalTaskSystem extends Disposable implements ITaskSystem {
 						this._fireTaskEvent(TaskEvent.create(TaskEventKind.ProcessStarted, task, terminal!.processId!));
 						processStartedSignaled = true;
 					}
-
 					this._fireTaskEvent(TaskEvent.create(TaskEventKind.ProcessEnded, task, exitCode ?? undefined));
 
 					for (let i = 0; i < eventCounter; i++) {

src/vs/workbench/contrib/tasks/common/tasks.ts

@@ -1201,7 +1201,8 @@ export const enum TaskSettingId {
 	QuickOpenDetail = 'task.quickOpen.detail',
 	QuickOpenSkip = 'task.quickOpen.skip',
 	QuickOpenShowAll = 'task.quickOpen.showAll',
-	AllowAutomaticTasks = 'task.allowAutomaticTasks'
+	AllowAutomaticTasks = 'task.allowAutomaticTasks',
+	Reconnection = 'task.experimental.reconnection'
 }
 
 export const enum TasksSchemaProperties {

src/vs/workbench/contrib/terminal/browser/terminalInstance.ts

@@ -87,6 +87,7 @@ import { IOpenerService } from 'vs/platform/opener/common/opener';
 import { IGenericMarkProperties } from 'vs/platform/terminal/common/terminalProcess';
 import { ICommandService } from 'vs/platform/commands/common/commands';
 import { getIconRegistry } from 'vs/platform/theme/common/iconRegistry';
+import { TaskSettingId } from 'vs/workbench/contrib/tasks/common/tasks';
 
 const enum Constants {
 	/**
@@ -695,7 +696,7 @@ export class TerminalInstance extends Disposable implements ITerminalInstance {
 		this._shutdownPersistentProcessId = shutdownPersistentProcessId;
 	}
 	get persistentProcessId(): number | undefined { return this._processManager.persistentProcessId ?? this._shutdownPersistentProcessId; }
-	get shouldPersist(): boolean { return (this._processManager.shouldPersist || this._shutdownPersistentProcessId !== undefined) && !this.shellLaunchConfig.isTransient; }
+	get shouldPersist(): boolean { return (this._processManager.shouldPersist || this._shutdownPersistentProcessId !== undefined) && !this.shellLaunchConfig.isTransient && (!this.reconnectionOwner || this._configurationService.getValue(TaskSettingId.Reconnection) === true); }
 
 	/**
 	 * Create xterm.js instance and attach data listeners.
@@ -2386,12 +2387,12 @@ export class TerminalInstance extends Disposable implements ITerminalInstance {
 		}
 
 		// Recreate the process if the terminal has not yet been interacted with and it's not a
-		// special terminal (eg. task, extension terminal)
+		// special terminal (eg. extension terminal)
 		if (
 			info.requiresAction &&
 			this._configHelper.config.environmentChangesRelaunch &&
 			!this._processManager.hasWrittenData &&
-			(this.reconnectionOwner || !this._shellLaunchConfig.isFeatureTerminal) &&
+			(!this._shellLaunchConfig.isFeatureTerminal || (this.reconnectionOwner && this._configurationService.getValue(TaskSettingId.Reconnection) === true)) &&
 			!this._shellLaunchConfig.customPtyImplementation
 			&& !this._shellLaunchConfig.isExtensionOwnedTerminal &&
 			!this._shellLaunchConfig.attachPersistentProcess

src/vs/workbench/contrib/terminal/browser/terminalProcessManager.ts

@@ -36,6 +36,7 @@ import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/
 import { IHistoryService } from 'vs/workbench/services/history/common/history';
 import { IPathService } from 'vs/workbench/services/path/common/pathService';
 import { IRemoteAgentService } from 'vs/workbench/services/remote/common/remoteAgentService';
+import { TaskSettingId } from 'vs/workbench/contrib/tasks/common/tasks';
 
 /** The amount of time to consider terminal errors to be related to the launch */
 const LAUNCHING_DURATION = 500;
@@ -245,8 +246,7 @@ export class TerminalProcessManager extends Disposable implements ITerminalProce
 
 				// this is a copy of what the merged environment collection is on the remote side
 				const env = await this._resolveEnvironment(backend, variableResolver, shellLaunchConfig);
-
-				const shouldPersist = (!!shellLaunchConfig.reconnectionOwner || !shellLaunchConfig.isFeatureTerminal) && this._configHelper.config.enablePersistentSessions && !shellLaunchConfig.isTransient;
+				const shouldPersist = ((this._configurationService.getValue(TaskSettingId.Reconnection) && shellLaunchConfig.reconnectionOwner) || !shellLaunchConfig.isFeatureTerminal) && this._configHelper.config.enablePersistentSessions && !shellLaunchConfig.isTransient;
 				if (shellLaunchConfig.attachPersistentProcess) {
 					const result = await backend.attachToProcess(shellLaunchConfig.attachPersistentProcess.id);
 					if (result) {
@@ -318,7 +318,6 @@ export class TerminalProcessManager extends Disposable implements ITerminalProce
 		}
 
 		this._process = newProcess;
-
 		this._setProcessState(ProcessState.Launching);
 
 		// Add any capabilities inherit to the backend
@@ -461,7 +460,7 @@ export class TerminalProcessManager extends Disposable implements ITerminalProce
 			windowsEnableConpty: this._configHelper.config.windowsEnableConpty && !isScreenReaderModeEnabled,
 			environmentVariableCollections: this._extEnvironmentVariableCollection ? serializeEnvironmentVariableCollections(this._extEnvironmentVariableCollection.collections) : undefined
 		};
-		const shouldPersist = this._configHelper.config.enablePersistentSessions && (!!this.reconnectionOwner || !shellLaunchConfig.isFeatureTerminal);
+		const shouldPersist = ((this._configurationService.getValue(TaskSettingId.Reconnection) && shellLaunchConfig.reconnectionOwner) || !shellLaunchConfig.isFeatureTerminal) && this._configHelper.config.enablePersistentSessions && !shellLaunchConfig.isTransient;
 		return await backend.createProcess(shellLaunchConfig, initialCwd, cols, rows, this._configHelper.config.unicodeVersion, env, options, shouldPersist);
 	}
 

src/vs/workbench/contrib/terminal/browser/terminalService.ts

@@ -175,7 +175,6 @@ export class TerminalService implements ITerminalService {
 		// we update detected profiles when an instance is created so that,
 		// for example, we detect if you've installed a pwsh
 		this.onDidCreateInstance(() => this._terminalProfileService.refreshAvailableProfiles());
-
 		this._forwardInstanceHostEvents(this._terminalGroupService);
 		this._forwardInstanceHostEvents(this._terminalEditorService);
 		this._terminalGroupService.onDidChangeActiveGroup(this._onDidChangeActiveGroup.fire, this._onDidChangeActiveGroup);