Tasks should have an option to clear the terminal before executing

[alexr00]

This clear option can be added into the exiting "presentation" task property and would be called "clear":

	{
		"label": "ExampleTask",
		"type": "shell",
		"command": "echo hello",
		"presentation": {
			"echo": true,
			"reveal": "always",
			"focus": false,
			"panel": "shared",
			"showReuseMessage": true,
			"clear": false
		}	
	}

Added to TaskPresentationOptions:

/**
 * Controls how the task is presented in the UI.
 */
export interface TaskPresentationOptions {
        ….
	/**
	 * Controls whether the terminal is cleared before executing the task.
	 */
	clear?: boolean;
}

[roblourens]

This doesn't work for me:

{
    "label": "My Task",
    "type": "shell",
    "command": "echo Hello",
    "problemMatcher": [],
    "presentation": {
        "clear": true
    }
}

I run it multiple times and see all the output, the terminal is never cleared.

[alexr00]

Turns out that if the only presentation option set is clear, this doesn't work. Thanks for finding!