[MediaWiki-l] Problem migrating from 1.38.5 to 1.39.1 due to Composer dependencies

Hi Everyone,

We are trying to migrate from Mediawiki 1.38.5 to 1.39.1. The webserver is Ubuntu 20.04.5 LTS, x86_64, fully patched.

At the step of installing Composer with its dependencies,[1] 'composer install' is dying with the error message:

<BEGIN SNIP> Your requirements could not be resolved to an installable set of packages.

Problem 1 - Installation request for doctrine/dbal 3.4.2 -> satisfiable by doctrine/dbal[3.4.2]. - doctrine/dbal 3.4.2 requires composer-runtime-api ^2 -> no matching package found.

Potential causes: - A typo in the package name - The package is not available in a stable-enough version according to your minimum-stability setting see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details. - It's a private package and you forgot to add a custom repository to find it <END SNIP>

We are running the latest version of Composer:

# apt-cache search composer | sort ... composer - dependency manager for PHP

And:

# apt-cache show composer Package: composer Architecture: all Version: 1.10.1-1 Priority: optional Section: universe/php Origin: Ubuntu ...

Please advise on how to proceed.

Thanks in advance,

Jeff

[1] https://github.com/weidai11/website/blob/master/mediawiki/wiki-upgrade.txt#L...