clace
dhall-lang
clace | dhall-lang | |
---|---|---|
12 | 113 | |
90 | 4,153 | |
- | 0.5% | |
9.6 | 5.5 | |
2 days ago | 27 days ago | |
Go | Dhall | |
Apache License 2.0 | BSD 3-clause "New" or "Revised" License |
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clace
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ETag and HTTP Caching
An approach like https://github.com/benbjohnson/hashfs allows file names to be updated at runtime to be content hashed. This removes the need for the extra "304 Not Modified" API calls from the client. This content hash based file renaming is usually done using a build step which renames files. For applications where the static file serving and HTTP request processing are done in the same application, this can be done in memory without a build step for file renames.
I am using that approach in my project https://github.com/claceio/clace. It removes the need for a build step while making aggressive static file caching possible.
- Show HN: Clace – Nginx Unit alternative – app server for internal apps
- Show HN: Clace – Platform for hypermedia driven internal web tools
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The End of Airplane.dev
I am building https://github.com/claceio/clace. It is focussed on building operational web apps, with a focus on security. The end goal is to build something between https://www.rundeck.com/ and https://retool.com/, allow automation of operational tasks through a web interface while also allowing fully custom web apps.
Clace also works great for running simple web apps locally. Building and deploying a web app should be as easy and common for backend engineers as creating a CLI app is.
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Is Htmx Just Another JavaScript Framework?
Hypermedia based web applications are a great fit for developing internal and operational tools. I have been building https://github.com/claceio/clace for making development and deployment easier for such web apps.
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Pocketbase: Open-source back end in 1 file
I have been building a project https://github.com/claceio/clace which aims to make building hypermedia based web applications easier. Clace is implemented in go, it uses Starlark (python syntax subset) for application configuration. With Clace, the apps are implemented using Starlark and (go) html templates, HTMX is used for web interface, app developer does not need to write any JavaScript.
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Python Is Easy. Go Is Simple. Simple = Easy
Starlark in go https://github.com/google/starlark-go is a great way to combine the best of both, the ease of use of Python and the simplicity of go.
I have been building a platform for deploying internal web applications using this approach https://github.com/claceio/clace. Use Starlark to configure the application, the platform itself is built in go.
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HTML First – Six principles for building simple, maintainable, web software
I have used this approach for internal tools and it has been great. It makes it much easier for one person to build the whole app, frontend and backend, and makes ongoing maintenance much easier.
I am working on https://github.com/claceio/clace which takes this no build approach and makes it easy to build portable applications, using Starlark running in go to configure the backend.
- Clace – Secure hypermedia web applications using Starlark and go
- Show HN: Clace – Platform for secure internal web applications
dhall-lang
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Apple releases Pkl – onfiguration as code language
Fail to see how this is any different than Dhall (https://dhall-lang.org/) other than it produces plists too.
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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)
- Why the fuck are we templating YAML? (2019)
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Is Htmx Just Another JavaScript Framework?
There are underpowered languages / tools, that can only solve a problem for which they are intended poorly. But not all limited tools are like that.
Say, eBPF is prominently not Turing-complete, which allows to guarantee that a eBPF program terminates, and even how soon. Still eBPF is hugely useful in its area.
Or, say, regular expressions are limited to regular languages; in particular, they famously [1] cannot process recursive structures, like trees. Still tools like grep / ag / rg are mightily useful.
Yes, I agree that YAML is underpowered for proper k8s configuration! But it's also too powerful for its own good in other aspects [2]. I wish Google used Dhall [3] or their own purely functional config language (FCL? I already forgot the name) instead of YAML; sadly, they did not.
[1]: https://stackoverflow.com/a/1732454/223424
[2]: https://ruudvanasseldonk.com/2023/01/11/the-yaml-document-fr...
[3]: https://dhall-lang.org/
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10 Ways for Kubernetes Declarative Configuration Management
Dhall: Dhall is a programmable configuration language that combines features like JSON, functions, types, and import capabilities. Its style leans towards functional programming, so if you're familiar with functional-style languages such as Haskell, you might find Dhall to be quite intuitive.
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Berry is a ultra-lightweight dynamically typed embedded scripting language
I've been thinking along these lines but more 'strongly validated' than statically typed in the sense that you'd be better off being able to load the entire config and then produce a list of problems (and should be able to offer good editor support if done correctly).
Though https://dhall-lang.org/ demonstrates that you can statically type quite a lot of configuration to great advantage, which appears to be programmatically embeddable in multiple languages per https://docs.dhall-lang.org/howtos/How-to-integrate-Dhall.ht...
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What Is the Point of Decidability
> Where practical is in the sense of an engineer (or in their terms, a CS practitioner),
Configuration processing. E.g. I'd like my yamls to be decidable, though I'd settle for guaranteed to halt[1].
[1] https://dhall-lang.org/
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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: FlakeHub – Discover and publish Nix flakes
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Home Blog Better configuration languages – A talk about Dhall [video]
And to checkout Dhall: https://dhall-lang.org/
What are some alternatives?
- - Hyphen - An elegant custom element base class
cue - CUE has moved to https://github.com/cue-lang/cue
go-plugin - Golang plugin system over RPC.
jsonnet - Jsonnet - The data templating language
DevSecOps - ♾️ Collection and Roadmap for everyone who wants DevSecOps. Hope your DevOps are more safe 😎
cue - The home of the CUE language! Validate and define text-based and dynamic configuration
hashfs - Implementation of io/fs.FS that appends SHA256 hashes to filenames to allow for aggressive HTTP caching.
terraform - Terraform enables you to safely and predictably create, change, and improve infrastructure. It is a source-available tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, and versioned.
fragmentify-js - FragmentifyJs
jsonlogic - Go Lang implementation of JsonLogic
tailgate - Client-facing generative-AI components without the fuss.
nix-gui - Use NixOS Without Coding