Add a $TURBO_WORKSPACES$ helper like $TURBO_DEFAULT$

[jpolo]

Goals

I often use root tasks to lint conf files at the root.

{
  "//#lint:root": {
      "inputs": ["$TURBO_DEFAULT$", ".env*", "!packages/**", "!apps/**"]
    }
}

But I have to specify the files to ignore (here "!packages/" and "!apps/")

The source of truth is duplicated (If I change the workspace structure, I must also patch turbo.json)

Having some kind of variable like $TURBO_DEFAULT$ would be cleaner

Non-goals

No response

Background

Based on the current $TURBO_DEFAULT$ implementation, this seems like a possible and standardized way of achieving this feature.

Proposal

To solve this, the idea would be to have a $TURBO_WORKSPACES$ that would resolve to the workspace files.

{
  "//#lint:root": {
      "inputs": ["$TURBO_DEFAULT$", ".env*", "!$TURBO_WORKSPACES$"]
    }
}
// $TURBO_WORKSPACES$ = the value of `(eval package.json//workspaces)`
// !$TURBO_WORKSPACES$ = negate each value of // $TURBO_WORKSPACES$