Pkl, a Programming Language for Configuration
pkl-lang.org
Pkl, a Programming Language for Configuration
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Re: Pkl, a Programming Language for Configuration
#2Pkl is a new language for describing configuration. It blends together the declarative nature of static formats like YAML or JSON, with the expressiveness, safety, and tooling of a general purpose programming language.
Re: Pkl, a Programming Language for Configuration
#3[dead]
Re: Pkl, a Programming Language for Configuration
#4I used this extensively when I worked at Apple and LOVED it. So excited that its finally out
Re: Pkl, a Programming Language for Configuration
#5I was a big believer in Helm for generating Kubernetes resources until I looked up and saw that we had created an impossible-to-validate, impossible-to-reason-about DSL in our values.yaml and that's when I realized we were at the end of our rope with Helm. We switched to Pkl for our Kubernetes resource generation -- it's delightful to maintain and reason about our deployments before execution time :)
Re: Pkl, a Programming Language for Configuration
#6I was a big believer in Helm for generating Kubernetes resources until I looked up and saw that we had created an impossible-to-validate, impossible-to-reason-about DSL in our values.yaml and that's when I realized we were at the end of our rope with Helm. We switched to Pkl for our Kubernetes resource generation -- it's delightful to maintain and reason about our deployments before execution time :)
This is the use case I am most interested in as well, templating strings into yaml always felt super clunky to me.
Re: Pkl, a Programming Language for Configuration
#7Pkl was one of the best internal tools at Apple, and it’s so good to see it finally getting open sourced.
My team migrated several kloc k8s configuration to pkl with great success. Internally we used to write alert definitions in pkl and it would generate configuration for 2 different monitoring tools, a pretty static documentation site and link it all together nicely.
Would gladly recommend this to anyone and I’m excited to be able to use this again.
Re: Pkl, a Programming Language for Configuration
#8Serious question - why not just use python?
Re: Pkl, a Programming Language for Configuration
#9Serious question - why not just use python?
Python isn't oriented around defining and validating data.
For example, something like: "this number is be between 1 and 10" means you have to come up with a novel way to add validation, because it isn't built into the language.
Also, Pkl is meant to be usable everywhere. General purpose languages tend to be tied to their own ecosystem--imagine telling a Go developer that they need to install Python, set up virtualenv, and run pip install so they can configure their application. We'd like Pkl to be a simple tool that can be brought anywhere, and easily integrated into any system.
Re: Pkl, a Programming Language for Configuration
#10Types on the fields is interesting. The examples suggest said types are lost when you serialise to json or xml, though it seems like at least some types should be expressible as schemas.
Language reference doesn't mention schemas either https://pkl-lang.org/main/current/language-reference/index.h...