starlark-rust
config
starlark-rust | config | |
---|---|---|
9 | 32 | |
623 | 6,091 | |
2.7% | 0.1% | |
9.8 | 4.5 | |
15 days ago | 7 months ago | |
Rust | Java | |
Apache License 2.0 | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
starlark-rust
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What config format do you prefer?
I haven't seen anyone mention starlark yet. It's something I want to play with as a config language.
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loxcraft: a compiler, language server, and online playground for the Lox programming language
Aside from these, if you want some inspiration for a production-grade language built in Rust, you might want to go through the source code of Starlark and Gluon.
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Launch HN: Moonrepo (YC W23) – Open-source build system
There is also a Rust implementation of Starlark as a starting point https://github.com/facebookexperimental/starlark-rust
To add to everyone else, please don't use YAML. Starlark is great _precisely_ because it is a readable, well known (nearly Python) language that is limited at the same time (no unbounded for loops, no way to do non-deterministic things like get the current time or `random()`).
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Benchmarking Starlark against other embedded scripting languages
This is a follow-up to Benchmarking mlua/rlua/rhai - Rust embedded scripting languages from 4mo ago; I just added the new Starlark implementation from Meta to the benchmark posted by @aleksru.
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The Perfect Configuration Format? Try TypeScript
The Rust implementation has it as an experimental extension (https://github.com/facebookexperimental/starlark-rust/blob/m...)
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Making an interpreter for variable length byte-code, any way to use enums for this and not just a big u8?
u/ndmitchell has been working on a Starlark interpreter. He wrote up a blog post with some thoughts about different interpreter styles. He found that in his case using fixed sized instructions was about the same as byte-encoded ones, but compiling the AST to closures was also about the same performance as well, and doesn't need an AST->bytecode compiler.
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Can i use rust to write my compiler??
As mentioned in other comments, type system features like algebraic data types (that Rust has) are really helpful. If you want a small-but-real example of a compiler in Rust (with an optimizer etc) then the starlark-rust compiler is good.
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Zellij – A Terminal Workspace and Multiplexer Written in Rust
If your Rust program needs a more complicated configuration (conditionals, access to APIs and so on), also look at Facebook's Starlark parser and tooling[1]. Starlark is a subset of Python used by Bazel, Buck and a few other projects.
[1]: https://github.com/facebookexperimental/starlark-rust
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New version of Rust Starlark, an implementation of a deterministic Python-like language
The Facebook post gives a nice overview. It also links out to the home page for the project at https://github.com/facebookexperimental/starlark-rust/, which has an introduction and links to what Starlark is, the crates.io link, the docs.rs link etc.
config
- Hocon (Human-Optimized Config Object Notation)
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XML is better than YAML
I don‘t understand why HOCON (https://github.com/lightbend/config/blob/main/HOCON.md) isn‘t used more often (at least for configuration use cases). It‘s a superset of JSON, has comments, multiline strings, optional quotes, replacement syntax. We use it at many places, and it‘s as nice at it can get.
- Toml-bench – Which toml package to use in Python?
- slf4j or System.Logger?
- TOML: Tom's Obvious Minimal Language
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Ron: Rusty Object Notation
HOCON is a great human-readable alternative to JSON. It's a superset of JSON with lots of cool features that make it both more readable and easier to use.
Here's a rundown of HOCON's main features: https://github.com/lightbend/config#features-of-hocon
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Spring and scala
"Typesafe Config" is the library generally used to read configuration files in HOCON format, which this library introduced. It's commonly used in essentially OOP/imperative Scala contexts, including Akka and its ecosystem.
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Make systemd better for Podman with Quadlet
Interesting!
For my own servers I use an internal tool that integrates apps with systemd. You point it at the output of your build system and a config file, and it produces a deb that contains systemd unit files and which registers/starts the server on install/reboot/upgrade, as a regular debian package would. Then it uploads it to the server via sftp and installs it using apt, so dependencies are resolved. As part of the build process it can download and bundle language runtimes (I use it with a JVM), it scans native binaries to find packages that the app should depend on, and you can define your config including package metadata like dependencies and systemd units using the HOCON language [1].
Upshot is you can go from a Gradle or Maven build to a running server with a few lines of config. Oh and it can build debs from any OS, so you can push from macOS and Windows too. If your server needs to depend on e.g. Postgres, you just add that dependency in your config and it'll be up and running after the push.
It also has features to turn on DynamicUser and other sandboxing features. I think I'll experiment with socket activation next, and then bundled BorgBackup.
Net/net it's pretty nice. I haven't tried with containers because many language ecosystems don't seem to really need them for many use cases. If your build tool knows how to download your language runtime and bundle it sans container by just setting up paths correctly, then going without means you can rely on your Linux distribution to keep things up to date with security patches in the background, it means networking works as you'd expect (no accidentally opened firewall ports!) and so on. SystemD knows how to configure resource isolation/cgroups and kernel sandboxing, so if you need those you can just write that into your build config and it's done. Or not, as you wish.
With a deployment tool to automate builds/pushes, systemd to supervise processes and a big beefy dedicated machine to let you scale up, I wonder how much value the container part is really still providing if you don't need the full functionality of Kubernetes.
[1] https://github.com/lightbend/config/blob/main/HOCON.md
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Introducing JXC: An extensible, expressive data language. It's a drop-in replacement for JSON and supports type annotations, numeric suffixes, base64 strings, and more!
Other similar standards: TOML, HOCON
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Jsonnet is better than YAML for generating JSON
I've also used HOCON pretty extensively for config, and it is better than both YAML and JSON for config with moderate to high complexity.
What are some alternatives?
cue - CUE has moved to https://github.com/cue-lang/cue
cfg4j - Modern configuration library for distributed apps written in Java.
cue - The home of the CUE language! Validate and define text-based and dynamic configuration
owner - Get rid of the boilerplate code in properties based configuration.
.tmux - 🇫🇷 Oh my tmux! My self-contained, pretty & versatile tmux configuration made with ❤️
dotenv - Loads environment variables from .env for nodejs projects.
wasmtime - A fast and secure runtime for WebAssembly
dotenv - A twelve-factor configuration (12factor.net/config) library for Java 8+
zellij - A terminal workspace with batteries included
Configur8 - Nano-library which provides the ability to define typesafe (!) configuration templates for applications.
Tmuxinator - Manage complex tmux sessions easily
centraldogma - Highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2