Fails to traverse directories in importMap

[dylanpyle]

This is a bit hard to understand without seeing the actual directory structure, so I've put a reproduction together here:

https://github.com/dylanpyle/dnt-repro

dnt fails to traverse directories/identify the correct base directory across folders specified in a deno.json import map, if the import used is more than one directory deep.

So, if your deno.json contains:

{
  "imports": {
    "project-two/": "../project-two/"
  }
}

— and you import something e.g.

import { thing } from "project-two/one-more-folder/mod.ts";

— it fails with the following error:

[dnt] Transforming...
error: Uncaught (in promise) "Error stripping prefix of /Users/dylan/dev/scratchpad/dnt-repro/project-two/one-more-folder/mod.ts with base /Users/dylan/dev/scratchpad/dnt-repro/project-one"

---

Reproduction steps:

• Clone the sample repo @ https://github.com/dylanpyle/dnt-repro
• cd project-one
• deno run -A compile.ts

Expected output:

• It works (which it does without the extra nested directory, and in most other similar cases)

Actual output:

$ deno run -A compile.ts
[dnt] Transforming...
error: Uncaught (in promise) "Error stripping prefix of /Users/dylan/dev/scratchpad/dnt-repro/project-two/deeper/mod.ts with base /Users/dylan/dev/scratchpad/dnt-repro/project-one"

[hesxenon]

for me it also fails without the nested structure, i.e.:

{
  "imports": {
    "project-two": "../project-two/mod.ts"
  }
}

Seems to me (with my very limited rust knowledge) that this line in mappings.rs fails because the whole "context" assumes that importmaps won't reference paths outside of the project directory?