`update.sh` fails to update with pruned variants

[MikeMcC399]

Environment

• Platform: Ubuntu 24.04.4 LTS
• Docker Version: N/A
• Node.js Version: 24.14.1
• Image Tag: N/A

Expected Behavior

To simulate dropping older variants in the upcoming Node.js 26, I removed all variants, except for trixie in a test branch for Node.js 25. (Not a real suggestion, just a setup for easier testing.)

I expected that running ./update.sh with no parameters would continue to update Node.js 25. In fact it skipped it.

Current Behavior

If the versions.json matrix contains a version key that does not include all variants, then that version is ignored and not updated at all.

Possible Solution

Modify ./update.sh to allow individual allocation of variants to versions.

Steps to Reproduce

Replace the 25 key in versions.json with a completely stripped down list of variants, with only trixie as a remaining entry. Delete also the corresponding sub-directories of 25 containing the Dockerfiles.

Execute:

./update.sh 25 trixie

Additional Information

Logs

$ ./update.sh 25 trixie
Updating version 20...
Updating version 22...
Updating version 24...
22/trixie/Dockerfile is already up to date!
24/trixie/Dockerfile is already up to date!
20/trixie/Dockerfile is already up to date!
Done!

This should update only 25, but instead updates everything except 25.