ext/arabic_rom dependencies not installed in the Docker image

[kirkhess]

Arabic script-to-Roman returns 500 on all input: ext/arabic_rom dependencies not installed in the Docker image

Summary

In lcnetdev/scriptshifter:latest, the arabic table advertises "has_s2r": true
but every script-to-Roman request returns HTTP 500, including a single ASCII
character. Roman-to-script on the same table works.

Root cause: funcy, pymarc and repackage are commented out in requirements.txt:

#funcy>=1.15,<2
#pymarc>=4.0,<5
...
#repackage>=0.7.3

Reproduction

docker run -d --rm -p 8000:8000 -e TXL_FLASK_SECRET=x lcnetdev/scriptshifter:latest

curl -s -X POST http://localhost:8000/trans \
  -H 'Content-Type: application/json' \
  -d '{"lang":"arabic","text":"محمد","t_dir":"s2r"}'

Response (HTTP 500):

{"output":"","warnings":["An internal error occurred.","If the error persists, contact the technical support team."]}

The same request with "text":"a" also returns 500, so it is not input
dependent. Roman-to-script on the same table succeeds:

curl -s -X POST http://localhost:8000/trans \
  -H 'Content-Type: application/json' \
  -d '{"lang":"arabic","text":"kitab","t_dir":"r2s"}'
# {"output":"كتب","warnings":[]}

GET /languages reports the table as supporting both directions:

"arabic": {
  "label": "Arabic",
  "marc_code": "ara",
  "has_r2s": true,
  "has_s2r": true,
  "description": "Arabic-to-Roman transliterator using the ArabicTransliterator external library.\n"
}

Fix

Installing the three missing packages resolves it completely:

docker exec <container> pip install funcy==1.15 "repackage>=0.7.3" "pymarc>=4.0.0"