[Tooling] ansi-color.js: Legacy octal escape is not permitted in strict mode

[jonasvle]

Describe the bug
RollupError: node_modules/ansi-color/lib/ansi-color.js (35:16): Legacy octal escape is not permitted in strict mode

33: var ansi_str = "";
34: for(var i=0, attr; attr = color_attrs[i]; i++) {
35: ansi_str += "\033[" + ANSI_CODES[attr] + "m";
^
36: }
37: ansi_str += str + "\033[" + ANSI_CODES["off"] + "m";

ERROR node_modules/ansi-color/lib/ansi-color.js (35:16): Legacy octal escape is not permitted in strict mode 13:58:49

To Reproduce
Steps to reproduce the behavior:

1. Install @genkit-ai/core or any package such as @genkit-ai/googleai which use @genkit-ai/core underlying in a nuxt application
2. Try to build the project
3. See error

Expected behavior
The build should succeed.

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Minimal reproduction: https://codesandbox.io/p/devbox/focused-mendel-568fwh?workspaceId=ws_W3Dk5bxF2Lw4qXT6z5Y4h1
Run pnpm run build

[ErikGS]

TL;DR: This issue comes from a deprecated dependency (@opentelemetry/exporter-jaeger) pulling in ansi-color.
Workaround: fork ansi-color and replace invalid octal escapes (\033) with hex escapes (\x1B) as described or by referencing the code in the mentioned PR.

---

I ran into this issue deploying a Nuxt app with @genkit-ai/core@1.19.2. As shown in the logs the problem ultimately lies in ansi-color package making usage of octal escapes.

There is already an open PR in that repo to address this problem, but it likely won’t be merged (it's from ~6 years ago and the last merge on that repo was ~13 years ago).

A possible workaround is to fork ansi-color and replace the invalid octal escapes (\033) with hex escapes (\x1B), as described here or by referencing the code in the mentioned PR above.

Here’s the dependency chain I traced:

ansi-color@0.2.1
  ├─ bufrw@1.4.0 (requires ^0.2.1)
  │  └─ thriftrw@3.11.4 (requires ^1.2.1)
  │     └─ jaeger-client@3.19.0 (requires ^3.5.0)
  │        └─ @opentelemetry/exporter-jaeger@1.30.1 (requires ^3.15.0)  <--- Here!
  │           └─ @genkit-ai/core@1.19.2 (requires ^1.25.0)
  │              ├─ @genkit-ai/ai@1.19.2 (requires 1.19.2)
  │              │  └─ genkit@1.19.2 (requires 1.19.2)
  ...
  └─ hexer@1.5.0 (requires ^0.2.1)
       └─ bufrw@1.4.0 (requires ^1.5.0)
          └─ thriftrw@3.11.4 (requires ^1.2.1)
             └─ jaeger-client@3.19.0 (requires ^3.5.0)
                └─ @opentelemetry/exporter-jaeger@1.30.1 (requires ^3.15.0)  <--- Same!
                   └─ @genkit-ai/core@1.19.2 (requires ^1.25.0)

So @opentelemetry/exporter-jaeger@1.30.1 is the dependency in @genkit-ai/core that ultimately brings in ansi-color.

For reference, @opentelemetry/exporter-jaeger@1.30.1 itself is deprecated:

(Deprecated) OpenTelemetry Jaeger Trace Exporter for Node.js
NOTE: Support for @opentelemetry/exporter-jaeger will end March 2024, please use any of the following packages instead:
@opentelemetry/exporter-trace-otlp-proto
@opentelemetry/exporter-trace-otlp-grpc
@opentelemetry/exporter-trace-otlp-http
NOTE: Bundling (with e.g. webpack, rollup, esbuild, ...) is not supported by this package. Please use @opentelemetry/exporter-trace-otlp-proto instead.