Task Provider Feature

[elahehrashedi]

#3674 : Add support to run cpp build tasks (Tasks: Run Build Task)

Will also fix these bugs:
#4278
#5285
#4278
#5270

Edited:
Refactoring the Task tools: Task: Configure Task and Task: Run Build Task, and C/C++: Build and Debug Active File
The multi-root is not implemented in this version yet.
You have to use the insider Vs Code to test the proposed API for this feature (1.49.0-insider).

These are the behavior of the current version:

when Task: Run Build Task is called:

1. If there is a tasks.json file exists:

• if there is a default build task: the default build task will be run (no task will be shown to the user to choose from).
  

• if there is NO default task: The list of all defined tasks in tasks.json will be shown to the user to choose from.
  

2. If tasks.json file doesn't exist:

• the detected build tasks will be shown to the user to choose from. no tasks.json will be created.
  

P.S. right now only Task: Configure Task and C/C++: Build and Debug Active File can create a tasks.json file for the first time.

[sean-mcmanus]

I'm not finished reviewing...

[sean-mcmanus]

I'm seeing an issue when there are spaces in the ${file} path. I'm not able to get mingw or cl.exe to work. When the workspace folder is named "New folder", I get cl : Command line warning D9024 : unrecognized source file type 'folder', object file assumed . That scenario works with 0.28.3.

[sean-mcmanus]

Build errors are not reported:

Build finished with error:
        Command failed: 

I think we would need to implement our own problem matcher to report the errors and/or forward the results to the terminal?

[sean-mcmanus]

Also, I'm seeing unusual tab and newline behavior in the terminal output with cl.exe.

This is the 0.28.3 result:
Microsoft (R) C/C++ Optimizing Compiler Version 19.27.28919.3 for x86
Copyright (C) Microsoft Corporation. All rights reserved.

test2.c
...\Test1\test2.c(5): error C2143: syntax error: missing ';' before '}'

[sean-mcmanus]

#5659 (comment)
#5659 (comment)
#5659 (comment)

[elahehrashedi]

• A sample results of a compiler error (the file name includes Space as well):
  
  

[bobbrow]

We can't check in this line

[bobbrow]

Should these periods have remained?