gura
jsonnet
gura | jsonnet | |
---|---|---|
7 | 48 | |
122 | 6,763 | |
0.0% | 0.5% | |
0.0 | 8.4 | |
over 1 year ago | 11 days ago | |
TypeScript | Jsonnet | |
MIT License | Apache License 2.0 |
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gura
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TOML: Tom's Obvious Minimal Language
If one is looking for an alternative config format, the best designed I've seen is https://github.com/gura-conf/gura
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Use TOML for `.env` Files?
I really like the Gura format (https://github.com/gura-conf/gura). Seems to combine the best of yaml, json, and toml for the use case of human created configuration files.
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Typed Config Languages
If we're on the topic of config languages, I'd like to plug Gura (https://github.com/gura-conf/gura). It's not too well-known, but it probably has the best design I've seen, and seems to have a good coverage of languages with an available library.
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Announcing Serde Gura 0.1
The first version of Serde Gura is now available! Gura is a simple and readable configuration language that will be familiar to any YAML and TOML user. Its essence lies in simplicity and was introduced in detail in this post on this subreddit.
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My first crate: a parser for the new config lang Gura
Hi! I've just published a Gura parser written in pure Rust. (Repository link below!) Gura aims to offer a much simpler and more readable alternative to TOML and YAML. If you are familiar with the latter language, learning Gura is easy and intuitive.
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Introducing Gura. A new configuration language readable as YAML, simple as TOML
Cool! There was a mistake and a very important section in README was deleted. We have added a Rationale section where we compare Gura with other languages, as explained there, Gura is not aimed to replace JSON as it's the faster configuration file in the world! But maybe can be able to take advantage of Gura's other benefits :D
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A Gura parser written in Python
Gura is a new configuration language readable as YAML, simple as TOML that supports variables, importing, and has standardized errors (official site | official repo).
jsonnet
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A Reasonable Configuration Language
jsonnet[1] and kapitan[2] are the tools I currently use. Their learning curve is not optimal (and I tried to contribute to smoothen it with a jsonnet course[3] and a 'get started wit kapitan' blog post[4]), but once used to it it's hard to do without, and their combination makes them even more useful (esp. if you deploy K8s).
In Ruud's case, Jsonnet might have been worth looking at as Hashicorp tools can be configured with json in addition to HCL. But that would have been less fun I guess ;-)
I hope for Ruud it finds its niche, there's quite some competition in this field!
1: https://jsonnet.org/
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Pkl, a Programming Language for Configuration
Kubernetes config is a decent example. I had ChatGPT generate a representative silly example -- the content doesn't matter so much as the structure:
https://gist.github.com/cstrahan/528b00cd5c3a22e3d8f057bb1a7...
Now consider 100s (if not 1000s) of such files.
I haven't given Pkl an in depth look yet, but I can say that the Industry Standard™ of "simple YAML" + string substitution (with delicate, error prone indentation -- since YAML is indentation sensitive) is easily beat by any of:
- https://jsonnet.org/
- https://nickel-lang.org/
- https://nixos.org/manual/nix/stable/language/index.html
- https://dhall-lang.org/
- (insert many more here, probably including Pkl)
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Introduction to Jsonnet: The YAML/JSON templating language
jsonnet cli: link
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10 Ways for Kubernetes Declarative Configuration Management
Jsonnet: A data template language implemented in C++, suitable for application and tool developers, can generate configuration data and organize, simplify and manage large configurations without side effects.
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-❄️- 2023 Day 4 Solutions -❄️-
[Language: Jsonnet] (on GitHub)
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What Is Wrong with TOML?
Maybe you'd like jsonnet: https://jsonnet.org/
I find it particularly useful for configurations that often have repeated boilerplate, like ansible playbooks or deploying a bunch of "similar-but" services to kubernetes (with https://tanka.dev).
Dhall is also quite interesting, with some tradeoffs: https://dhall-lang.org/
A few years ago I did a small comparison by re-implementing one of my simpler ansible playbooks: https://github.com/retzkek/ansible-dhall-jsonnet
- Show HN: Keep – GitHub Actions for your monitoring tools
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That people produce HTML with string templates is telling us something
Apologies for the lack of context, and for missing this comment until today.
Both are tools for defining kubernetes manifests (which are YAML) in a reusable manner.
Jsonnet is a formally specified extension of JSON. It’s essentially a functional programming language (w/some object oriented features) that generates config files in JSON/YAML/etc, so it’s straightforward to determine whether an input file is valid, and to throw an error that points to an exact line if it’s not. It has a high learning curve, especially for people whose only experience is with imperative languages.
https://jsonnet.org/
Helm charts also generate YAML/JSON config files, but they use Go templating. This is easier and faster to understand, since it’s mostly string substitution and not much logic (there’s conditionals, iterators, and very basic helper functions). Unfortunately a simple typo or mistake can cause errors that are difficult to diagnose (the message may indicate a problem far away in code from the actual mistake). It can also generate output that’s valid according to the string templating rules, but not what was intended, which can be very confusing to debug.
Despite these shortcomings, the vast majority of kubernetes applications are distributed as helm charts. I understand why things ended up this way, but I still wish it were more common for people to invest the upfront effort to learn the superior tool, so it could be more widespread.
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TOML: Tom's Obvious Minimal Language
I like Google's Jsonnet [1], which has all of this except for 4.
Jsonnet is quite mature, with fairly wide language adoption, and has the benefit of supporting expressions, including conditionals, arithmetic, as well as being able to define reusable blocks inside function definitions or external files.
It's not suitable as a serialization format, but great for config. It's popular in some circles, but I'm sad that it has not reached wider adoption.
[1] https://jsonnet.org/
- Jsonnet – The Data Templating Language
What are some alternatives?
config - configuration library for JVM languages using HOCON files
kube-libsonnet - Bitnami's jsonnet library for building Kubernetes manifests
uniffi-rs - a multi-language bindings generator for rust
dhall-lang - Maintainable configuration files
gura-rs-parser - A Gura parser for Rust
cue - CUE has moved to https://github.com/cue-lang/cue
zaml - The Final Form of configuration files
cue - The home of the CUE language! Validate and define text-based and dynamic configuration
serde-gura - Strongly typed Gura library for Rust
json5 - JSON5 — JSON for Humans
strictyaml - Type-safe YAML parser and validator.
cdk8s - Define Kubernetes native apps and abstractions using object-oriented programming