(node:75956) [DEP0040] DeprecationWarning: The punycode module is deprecated. Please use a userland alternative instead.

[Pat-Ayres]

I didn't see any issues referencing this deprecation, so just wanted to post a notification.

Node 21.2.0 has deprecated the punycode module. Since upgrading my node version to 21.2.0 I see the deprecation warning with every leapp cli command I run. This is particularly noisy in some scripts I have where multiple leapp commands are used together and each one emits the deprecation warning.

❯ leapp profile list
(node:75956) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
 Profile Name
 ─────────────────────────────────────────────
 default

Leapp Version

❯ leapp --version
@noovolari/leapp-cli/0.1.46 darwin-arm64 node-v21.2.0

Additional context
This came up for me because I don't use node on my host specifically so I wasn't paying close attention to the version. I had just installed it via brew install node and letting it upgrade when I do my brew updates.

I was able to uninstall node with brew uninstall --ignore-dependencies node (I needed --ignore-dependencies because the leapp brew formula depends on) and then switching to nvm to install the lts version explicitly.

[andreacavagna01]

Thanks for this feedback. I think that upgrading the package json will solve this issue.

Thanks for pointing it out!

[urz9999]

Hi @Pat-Ayres we are currently investigating alternatives to the library, in the meanwhile you can add this command NODE_OPTIONS="--no-deprecation" to your .bashrc/.zshrc or use it before the commands to hide the warning. Let me know if this can help as a workaround

[murshed-panorama]

@urz9999 Thanks for the suggestion, but unfortunately it didn't work for me. I added the line to my .zshrc file, source'd, but still saw the deprecation warnings when I ran leapp profile list. I'm on node v21.4.0. I did confirm NODE_OPTIONS was set in the shell with echo $NODE_OPTIONS.

The workaround to use nvm instead was successful.

[ericvilla]

Hi @murshed-panorama, I did a test with node v21.4.0
I appended export NODE_OPTIONS='--no-deprecation' to my ~/.zshrc file, sourced it, and run leapp profile list.
The following is the output (I've just a single default profile):

❯ leapp profile list
 Profile Name
 ────────────
 default

Well, this is just a way to hide the deprecation warning; a valid alternative to the deprecated punycode module should be used.