RustConf just uploaded on YouTube the recording of my C-to-Rust migration talk! Check it out if you want to learn more about the Rust work we've been doing on Redis Query Engine over the past few months. youtu.be/H0AUP2OgppE...

Concrete goal: define a driver-agnostic way to configure a Postgres connection. Then you research the details, obsess over an aspect (i.e. SSL configuration) and end up working for several ways on a generic way to configure a TLS client policy. Cool, but slow.

Only two weeks to go!

New Redis release, but with a twist. It includes our first Rust patches to Redis Query Engine! In particular, it ships the new TrieMap implementation I wrote with Henk Oordt, as part of @mainmatter.com's ongoing collaboration with Redis.

That beautiful feeling of being ~done on a 35k lines* PR 🍉 *Don't do this at work. **Many lines are test snapshot updates.

We have another opening at Mainmatter, this time for a *technical writer*. You'd be working directly with me on new Rust training material, blog posts and other kinds of technical long-form content. If you're interested, send your resume job AT mainmatter DOT com

Rust 1.89.0 will stabilize let-chains (yay 🎉). In the same release, clippy will flag `if` statements that can be collapsed further using a let-chain. Outcome: your CI will fail when 1.89.0 is released, and you can't fix it ahead of time because the feature clippy wants you to use isn't stable yet 🙃

It's official now: I'll be a speaker at RustConf 2025 🎉 My talk falls into the "Interop & Migration" theme, covering the work we've been doing with Redis, supporting the migration of some of their C code to Rust. You'll get all the details when the full schedule is announced!

Two things can be true at the same time: - You can achieve ~everything with enough practice - Dan Luu is spot on when he says that "95%-ile isn't that good" If you've never read the article, this is your chance: danluu.com/p95-skill/

The Rust-Python workshop at @pyconit is about to start! Seek me out if you're at the conference and you want to talk about native extensions!

Two weeks left to submit your talk proposals for EuroRust 2025 ⏳ The CfP closes on June 2nd! We're looking for a wide range of contributions: beginner-friendly talks, reports on Rust industrial usage, deep-dives on language features or crates, tutorials, etc.

Pavex is now officially registered as a trademark! Another to-do item can be crossed off the public beta checklist ✅

The Rust team at Mainmatter has grown, but we need to grow it further! We're looking for freelancers to help us migrate a database from C to Rust. It's an incremental rewrite: a module at a time, interfacing with the existing C code. European hours, full remote, 4 days a week.

In case you were wondering: work on Pavex continues! I'm reworking the public API to minimize friction. We're shifting towards attribute macros for component egistration. This removes the need to spell out raw paths, a major pain point of the first beta version.

italians are about to invent a form of corruption so lucrative it will destroy the global economy

Useful heuristics: if a new feature allows you to delete entire sections out of your documentation, it's a good change.

It took a few iterations, but the API for sessions in Pavex is _done_. The release includes a guide and two storage implementations (in-memory and Postgres-based). More storage options will follow.

At Mainmatter we're looking for Rust contractors to augment our internal consulting team. Two different profiles: - Rust, with a background in production C/C++ - Rust on the backend The rate is 500-800 euros/day. Remote, but you *must* be in a European timezone. More details ↓

Sessions for Pavex are *almost* done now. Just a couple more finishing touches.

Within every #rust engineer there are two wolves: one loves `serde`, the other hates returning deserialization errors one at a time to their users. We wrote `eserde` to bring you peace. (To bring _me_ peace too, at last!)

Amazing to see "100 Exercises to Learn Rust" mentioned by name on this year's Rust survey as one of the most common ways to learn the language. It's been an incredible year for that course!

Having some ✨fun✨ with tracking the path for fields who failed to deserialize. Friday tip: if you ignore a test, write down _why_.

Quick reminder that in two weeks I'll be at RustNation UK, teaching folks how to get Rust and Python to play nice with each other! I'll be around during the talk day as well, so hit me up if you want to chat about all things Rust.

Release automation is glorious when it works, but awful when it fails mid-flight. You need to figure out what went wrong _and_ restore the repository to a state the (patched) automation can pick up again.

It looks like someone has launched a coin named $PAVEX on Solana to milk my reputation for a quick pump and dump scheme. I have absolutely**nothing** to do with the project.

I published the first version of `tracing_log_error`, a new utility for logging errors in Rust projects. It provides `log_error!`, a macro that captures everything you may care about when it comes to error, with consistent naming as a bonus.

I found myself writing a gnarly declarative macro today, so I had to learn _again_ how to debug them. This time I took the time to write down the tools I used, easing the work of my future self (or other contributors).

"Die young, or live long enough to become the villain" The minimal architectural style I used in "Zero to Production in Rust" is being used an example of a "Very Bad Application" in one of the articles featured in This Week in Rust. I'm more amused than offended to be honest.

Sprinkling some ASCII art throughout the new concurrency chapter of our Rust-Python course ✨

In January and February I'll be tutoring some remote Rust courses: - Learn Rust, from scratch - Advanced Rust testing - Rust-Python interoperability If any of those topics picks your interest, check them out! All info at rust-exercises.com#tutored-work...

Huge shout out to @lpalmieri.com and his book Zero to Production in Rust. 😍 This book does not just go and teach me Rust. It shows me how to build production grade application with all the bells an whistles! I really enjoyed the part about Telemetry and how to instrument tracing! Grazie Luca! 🙏

Productivity tip: define a layout with the panes you _always_ use when working on a project. `zellij --layout run-layout.kdl` and you're then ready to work! Faster than creating a new tab, creating each pane, getting command from historys, etc. Easier for contributors, too!

Undeniably so.

`rinja`, the Rust template engine, is really growing on me. It brings to the table all the compile-time checks I used to love in `askama`, with nice improvements in syntax and error reporting. The syntax to render individual blocks from a template plays wonderfully with HTMX too.

If you're looking for a nice introduction to type-driven design in Rust, Henk has got you covered: mainmatter.com/blog/2024/1...

Today I learned that GitHub, in the year of our Lord 2024, doesn't behave as an OpenID Connect identity provider. It only provides the basic OAuth2 flow, forcing you to write bespoke integration code to fetch user information (ID, email, etc.). Why 🥲

Me at $work: "Small PRs folks, we need fast turnaround with as few defects as possible" Me on my solo projects:

Solid tenet to live by: emit the diagnostics you wished you had when working on your last project.

Domain-based routing in Pavex is not fully baked yet (nor released), but the first sanity tests are passing 🎉 Fair to say I know a lot more about domain name validation than I did last week.

"Domain-based routing, how hard can it be?" Naive Luca, a few days ago, working on Pavex.

Handling type aliases in Pavex's reflection engine is such a pain. "It's just a redirection, normalize everything!" "Oh no, generic parameters can be remapped, gotta handle that" "Oh no, what paths do we show to users in errors? Normalized or not?" 🥲

Someone skipped input validation here.

New shiny toy has just been released: cargo-px! If you are generating Rust source files at compile-time, you might want to check it out. lpalmieri.com/posts/cargo-px/

It's fascinating how UX elements have different levels of penetration depending on the customer segment. Wishing once again that Affinity publisher had a command palette a la VS Code: I know what I want to do, I don't know in which menu it is hiding 🙃

Strongly trying to resist the temptation to craft a build system that is more general than what I actually need in pavex.dev I need to pull off one tiny extension to cargo: crate generation. And if you need more than that, may buck2 be with you.

Hello hello 😄