GH-4814 Looking at Gulp/Jake/Grunt plugins extensions.

[lmcbout]

Fixes #4814
It is possible to have tasks with the same type, so we need to
differentiate them.
Using the handle available with the task to create a unique provider.
This allow to have following plugins within the same workspace:

• grunt
• gulp
• jake

Jake is using the old API to computeTask(). Because of that, I need to implement the deprecated Task constructor to handle Jake.
To support the vscode built-in plugin for JAKE , there is two ways:
1- I need to implement the deprecated Task constructor to handle Jake.
2- Jake vscode built-in plugin needs to be adjusted to handle the creation of task using the newest API

In the current solution, I implemented solution 1, so we can support JAKE until vscode modify the Jake plugin

For solution 2, we need to modify:
File: jake/src/main.ts
Method computeTasks() at ~line 145, need to modify the following line by adding the workspaceFolder as a parameter:

OLD:
let task = new vscode.Task(kind, taskName, 'jake', new vscode.ShellExecution(${jakeCommand} ${taskName}, options));

NEW:
let task = new vscode.Task(kind, this._workspaceFolder, taskName, 'jake', new vscode.ShellExecution(${jakeCommand} ${taskName}, options));

For testing purpose, you need to add in the package.json the following packages. (Either in devDependencies or dependencies)
"dependencies": {
"gulp": "latest",
"gulp-util": "latest",
"gulp-sass": "latest",
"gulp-coffee": "latest",
"gulp-uglify": "latest",
"gulp-concat": "latest",
"gulp-connect": "latest",
"grunt": "~0.4.5",
"grunt-cli": "^1.3.2",
"grunt-contrib-jshint": "~0.6.4",
"grunt-contrib-nodeunit": "~0.2.0",
"grunt-contrib-watch": "~0.5.3",
"jake": "^8.1.1"
}
With those packages installed, you can test "Gulp", Grunt", "Jake" and "npm" if installed

Signed-off-by: Jacques Bouthillier jacques.bouthillier@ericsson.com

[elaihau]

Tested with Gulp, Jake, Grunt, and npm extensions in my local env. Looks good. Thank you !

[elaihau]

this pr is part of #4216