Support rez-env -c <alias> or -- <alias> (Windows CMD shell)

[davidlatwe]

Problem

As #708 stated, rez-env pkg -c alias-cmd or rez-env pkg -- alias-cmd currently not supported (on Windows).

Solution

Since the Alias object will be saved in ActionManager if any alias setup been found in package's commands by RexExecutor, look into that list and matching them with input command, swap it back to actual command if matched, would be the simplest solution.

[instinct-vfx]

I think this would rather belong into the cmd shell plugin instead of resolved_context. It is a shell specific issue, not platform specific. (Powershell handles it fine).

[davidlatwe]

That's weird, just tested on current master branch with my powershell and it didn't work :O

Ah, nevermind. Just found that I am still spawning cmd shell in my powershell. :/

[davidlatwe]

Okay, I have changed my implementation into CMD specific. ☺️

[davidlatwe]

Just checking in, is this a valid/solid solution to you guys ? :)

[davidlatwe]

Just improved the implementation, the command that has alias + arguments can be matched and expand now.

Also, one more simple test case is added.