Issue #587 - 2022-10-24 - Continuous Integration for Perl modules

latest | archive | edited by Gabor Szabo
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Hi there!

For years Perl was a long way ahead of the other languages in terms of testing the modules. The volunteers of the CPAN Testers provide an excellent service. Every time a new module or a new version of an older module is uploaded to CPAN (via PAUSE) within days and sometimes even within hours the CPAN Testers would download the new release, test it on their machines, and send a report to the author. Sometimes they would even open issues/tickets manually to report the problem and help the author(s) fix them.

These days, however, Open Source developers can use a number of free Continuous Integration systems that would give them feedback much sooner: On every push to GitHub or GitLab. They can run the author or release tests on these systems. They can configure to test other modules that use their module (reverse dependencies) to make sure the new changes don't have a negative impact on these users. They can can even re-run all the tests every day making sure that changes in the dependencies of the module don't break it. (CPAN Testers usually run the tests of a module only if you release a new version or if your module is a dependency of something that was released.)

By catching certain issues before they release a new version they provide a better experience to every user of CPAN and they also take some of the manual work off the shoulders of the CPAN Testers who are few.

For many years Travis-CI was the de-facto standard to set up CI for GitHub-based project. These days it is primarily GitHub Actions.

So, I have been on a quest to configure GitHub Actions to all the Perl projects where the author is interested. I have documented some of these and I have written on Why and how to CI. I use the CPAN Digger to locate candidates, but if you'd like to get help with setting up CI, open an issue on your project and tag me. If you like my quest, feel free to sponsor me so I'll be able to allocate more time to this. Oh, and if your company needs help with CI and test automation, I offer that as a service.

Enjoy your week!

Gabor Szabo


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Enjoy a quick recap of last week's contributions by Team PWC dealing with the "Days Together" and "Magical Triplets" tasks in Perl and Raku. You will find plenty of solutions to keep you busy.

Days Together Are Magical

by Adam Russell

Constraint Programming? Never heard of the term before, thanks for introducing.

Magical Together

by Arne Sommer

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PWC187 - Days Together

by Flavio Poletti (POLETTIX)

Great show of Perl and Raku solutions side by side. Much better to learn the new tricks. Keep it up great work.

PWC187 - Magical Triplets

by Flavio Poletti (POLETTIX)

Breaking down of the task into smaller actions makes it easy to follow. Excellent work, thanks for sharing.

The Weekly Challenge 187

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Perl Weekly Challenge 187: Days Together

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Just one task and that too in Raku this week. The discussion around the task is worth checking out.

overlapping days and numbers

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Brute force method in show, not a bad choice. In the end you get a clean solution. Keep it up great work.

Perl Weekly Challenge 187

by W Luis Mochan

Another show of cool one-liner in Perl. Amazing solutions, keep it up great work.

Foo meets Bar and the wizardly trio

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Magical Days Together

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As always the case, we got yet another collection of solutions in different languages. Thanks for keeping us engaged.

Magical Days Together with Triplets

by Simon Green

Love the mix of Cricket and Coding. Good luck to my Kiwi support. Thanks for your contribution.

PWC 187

by Stephen G Lynn

I love the commentary on fellow member's contribution in the blog post. Keep it up great work.

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