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Nibble Stew: After exactly 10 years, Meson 1.0.0 is out

 2 years ago
source link: https://nibblestew.blogspot.com/2022/12/after-exactly-10-years-meson-100-is-out.html
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A gathering of development thoughts of Jussi Pakkanen. Some of you may know him as the creator of the Meson build system.

Friday, December 23, 2022

After exactly 10 years, Meson 1.0.0 is out

The first ever commit to the Meson repository was made 10 years ago to this day. To celebrate we have just released the long-awaited version 1.0.

The original design criterion for doing a 1.0 release was "when Meson does everything GStreamer needs". This happened, checks notes, three years ago (arguably even earlier than that). That is not the world's fastest reaction time, but that comes mostly down to our development policy. Meson aims to make releases at a steady pace and maintains backwards compatibility fairly well (not perfectly). There is unlikely to ever be a big breaking change, so there is no pressing technical need to bump the major version number.

Thus 1.0 is mostly a symbolical milestone rather than a technical one, end users should not not really notice that big of a difference. This does not mean that the release is any less important, though. To celebrate here is an assortment of random things that have happened over the years. Enjoy.

The greatest achievement

Perhaps the best example demonstrating the maturity of Meson is that I no longer do all the decisions. In fact most decisions and especially the code that goes with it is done by a diverse group of people. In fact I do very little of the actual development, I'm more of a product owner of sorts that can only nudge the project into certain directions rather than being able to turn the entire ship around on a dime. This is a bit sad, but absolutely necessary for long term survival of the project. It means that if one of those malevolent buses that seem to stalk software developers succeeded in hitting me, its effect on the project would not be all that big.

Reimplementation

There are two main reasons for reimplementing an existing open source project from scratch. The first one is that the upstream developer is a jerk and people don't want to work with them. The second is that someone, somewhere sees the project as important enough to have a second, independent implementation. I'm happy to report that (as far as I know at least), Meson is in the second group because there is a second from-scratch implementation of Meson called Muon. 

Meson is implemented in Python but its design was from the very start that this is only an implementation detail. We spent a fair bit of effort ensuring that the Python bits don't leak in the DSL, even by accident. There wasn't really any way of being sure about it short of doing a second implementation and now there is one as Muon is implemented in plain C.

Collaborative design

We all know that disagreeing with other people on the Internet might be very discouraging. However sometimes it works out incredibly well, such as in this merge request. That MR was really the first time a new feature was proposed and the submitter had a very different idea than me of what the API should look like. I distinctly remember feeling anxious about that at the time because I basically had to tell the submitter that their work would not be accepted.

To my surprise everything went really well. Even though there were many people involved and they had wildly different ideas on how to get the feature done, there was no pouting, no stomping of feet, shouting or the like (which, for the record, there had been in other similar discussions). Absolutely everybody involved really wanted to get the feature in and were willing to listen to others and change their stances based on the discussion. The final API turned out to be better than any of the individual proposals.

Thanks to contributors

According to Github statistics, a total of of 717 different people have at least one commit in the repository. This number does not cover all the other people who have contributed in other ways like docs, bug triaging, converting existing projects and so on. It is customary to thank people who have done major contributions like new features in milestone posts like these.

I'm going to do something different instead. In addition to "the big stuff" any project has a ton of less than glamorous work like bug fixing, refactoring, code cleanups and the like. These tasks are just as important as the more glitzy ones, but it sadly go underappreciated in many organisations. To curb this trend I'd like to pick three people to thank for the simple reason that when it turned out that sh*t needed to be done, they rolled up their sleeves and did it. Over and over again.

The first one is Dylan Baker, who has done major reorganisation work in the code including adding a lot of typing hints and fixed the myriad of bugs the adding of said type hints uncovered.

The second person is Eli Schwartz, who has done a ton of work all around, commented on many bug reports and on the Matrix channel. In fact he has done so much stuff that I suspect he never sleeps.

And finally we have Rosen Penev, who has done an astounding amount of work on WrapDB, both fixing existing wraps as well as updating them to new releases.

And finally: a secret

Meson gets a lot of bug reports. A lot a lot. Nirbheek Chauhan, one of the co-maintainers, once told me that Meson generates more bug email than all Gnome projects combined. I try my best to keep up with them, but the sad truth is that I don't have time to read most of them. Upon every release I have to clean up my mailbox by deleting all Meson bug mail.

The last time I did this I nuked more than 500 email threads in one go. No, not emails, email threads. So if you have wondered why your bug report has not gotten any replies, this is why. Simply reading the contents of Meson bug emails would be more than a full time job. Such is the price of success, I guess.


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