I am using Django translations for a project, and would like to ensure, on TravisCI, that translations are not left behind when changes are made to translatable strings.
This is a simplified snippet of my .travis.yml:
script:
- ...
- python manage.py makemessages -l ja --no-wrap --no-location
- git diff --exit-code
That recreates the PO files, and fails when the file changes. So far so good.
Unfortunately, django updates the POT-Creation-Date every time the script is run, and I can't see any flags to makemessages that would disable that, so even if there are no changes, the file changes on every run.
Am I on the right lines, or is there a better way to detect that there has been a change?
Git now has a nice way to ignore specific matches. The following line will fail if there is a diff, but exclude the problematic header:
git diff --ignore-matching-lines=POT-Creation-Date --exit-code
What's better, Django recently merged a change to stop this header from getting updated when there are no changes to the translations. It hasn't been released as of Django 4.0, so I expect it will arrive in Django 4.1.