Since Deno 2.6.6 getting "Too many redirects for 'npm:/..." errors

[zefhemel]

With Deno 2.6.5 all is fine, after upgrading to 2.6.6 I get this:

✘ [ERROR] Too many redirects for 'npm:/@codemirror/legacy-modes@6.5.2/mode/sql' [plugin deno-loader]

    client/languages.ts:5:7:
      5 │ } from "@codemirror/legacy-modes/mode/sql";
        ╵        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

✘ [ERROR] Too many redirects for 'npm:/@codemirror/legacy-modes@6.5.2/mode/rust' [plugin deno-loader]

    client/languages.ts:6:37:
      6 │ import { rust as rustLanguage } from "@codemirror/legacy-modes/mode/rust";
        ╵                                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

✘ [ERROR] Too many redirects for 'npm:/@codemirror/legacy-modes@6.5.2/mode/python' [plugin deno-loader]

    client/languages.ts:7:41:
      7 │ import { python as pythonLanguage } from "@codemirror/legacy-modes/mode/python";
        ╵                                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

✘ [ERROR] Too many redirects for 'npm:/@codemirror/legacy-modes@6.5.2/mode/protobuf' [plugin deno-loader]

    client/languages.ts:10:7:
      10 │ } from "@codemirror/legacy-modes/mode/protobuf";
         ╵        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

✘ [ERROR] Too many redirects for 'npm:/@codemirror/legacy-modes@6.5.2/mode/shell' [plugin deno-loader]

    client/languages.ts:11:39:
      11 │ import { shell as shellLanguage } from "@codemirror/legacy-modes/mode/shell";
         ╵                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

✘ [ERROR] Too many redirects for 'npm:/@codemirror/legacy-modes@6.5.2/mode/swift' [plugin deno-loader]

    client/languages.ts:12:39:
      12 │ import { swift as swiftLanguage } from "@codemirror/legacy-modes/mode/swift";
         ╵                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

(examples here are all about codemirror, but I have other examples too with preact/hooks imports for instance)

This seems to only happen for npm imports that have paths inside of a package, in my deno.json I have import maps like this::

"imports": {
    "@codemirror/legacy-modes": "npm:@codemirror/legacy-modes@6.5.2"
}

Any idea what could be going on?

[egfx-notifications]

I bisected the changes between Deno 2.6.5 and 2.6.6, it seems to be caused by this upgrade of deno_graph: denoland/deno#31879

[egfx-notifications]

https://github.com/denoland/deno/pull/31879/changes#diff-173ccedeb7f83e3e957f25e701e7fd898850183300d22f07698f9b37d7bdbbd5R347-R357 generates circular redirects

I have a fix that works for my affected project. Will make a PR in the deno project after testing this more thoroughly.

[dsherret]

My bad!

Side note: I recommend using https://github.com/denoland/deno-esbuild-plugin if that's possible in your situation as it's up to date with the latest Deno.