atlas pin doesn't work when the workspace is in the current project

[elcritch]

Found this bug updating one of my earlier projects with a lockfile. Looks like instead of using the URL, atlas for some reason falls back to the local dir.

I plan to add some integration tests for lockfiles as I don't believe we have any currently. Or if we do, there needs to be more.

Expected lockfile:

{
  "items": {
    "stew": {
      "dir": "$deps/nim-stew",
      "url": "https://github.com/status-im/nim-stew",
      "commit": "7afe7e3c070758cac1f628e4330109f3ef6fc853",
      "version": "0.1.0"
    },
    ...
}

But getting:

  "items": {
    "stint": {
      "dir": "$deps/nim-stint",
      "url": "file:///Users/jaremycreechley/projs/status/nim-codex-dht/vendor/nim-stint",
      "commit": "86621eced1dcfb5e25903019ebcfc76ed9128ec5",
      "version": "0.0.1"
    },
    ...
}

[elcritch]

I'll probably not get to this for a couple of weeks with holidays, and travel coming up.