Data_migration parameters not showing in update.php --help

I tried to follow tt-rss migration from mysql to postgres (to finally get to use docker) as described here:

Beforehand I updated tt-rss instance from git (to 43ea36d03…9669bb94d), then installed data_migration plugin from fox (v21.03-841bea8) and installed zip for php.

The data_migration plugin shows up in WebGUI Plugins and on update.php --plugins-list (so I assume the file/directory permissions are set correctly) but

update.php --help

does not list the relevant command line parameters as described in
https://git.tt-rss.org/fox/ttrss-data-migration/wiki.

Also the export command does not work but only shows the command line help.

Setting log level to 2 does not give any hints. I am using php 7.4.15. on debian testing.

Any ideas on what is going on?

this plugin needs to be enabled systemwide

Q: but how do i?
A: rtfm

Thank you!

I went through the configuration once more and, of course, found a typo :-/
Added data-migration instead of data_migration in config.php :man_facepalming: Not sure how often I overlooked this yesterday.

So currently exporting data and hoping that /tmp will have enough storage (for temporary? mysql table).

Next step will be to find out how to import data to dockerized postgres db.