skycfg
nestedtext
skycfg | nestedtext | |
---|---|---|
6 | 8 | |
634 | 335 | |
0.5% | - | |
3.9 | 7.9 | |
about 1 month ago | 5 days ago | |
Go | Python | |
Apache License 2.0 | MIT License |
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skycfg
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Jsonnet – The Data Templating Language
I can definitely sympathize here - in every context, just straight JSON/YAML configuration seems never expressive enough, but the tooling created in response always seems to come with sharp edges.
Here are some of the things I appreciate about Jsonnet:
- It evals to JSON, so even though the semantics of the language are confusing, it is reasonably easy to eval and iterate on some Jsonnet until it emits what one is expecting - and after that, it's easy to create some validation tests so that regressions don't occur.
- It takes advantage of the fact that JSON is a lowest-common-denominator for many data serialization formats. YAML is technically a superset of JSON, so valid JSON is also valid YAML. Proto3 messages have a canonical JSON representation, so JSON can also adhere to protobuf schemas. This covers most "serialized data structure" use-cases I typically encounter (TOML and HCL are outliers, but many tools that accept those also accept equivalent JSON). This means that with a little bit of build-tool duct-taping, Jsonnet can be used to generate configurations for a wide variety of tooling.
- Jsonnet is itself a superset of JSON - so those more willing to write verbose JSON than learn Jsonnet can still write JSON that someone else can import/use elsewhere. Using Jsonnet does not preclude falling back to JSON.
- The tooling works well - installing the Jsonnet VSCode plugin brings in a code formatter that does an excellent job, and rules_jsonnet[0] provides good bazel integration, if that's your thing.
I'm excited about Jsonnet because now as long as other tool authors decide to consume JSON, I can more easily abstract away their verbosity without writing a purpose-built tool (looking at you, Kubernetes) without resorting to text templating (ahem Helm). Jsonnet might just be my "one JSON-generation language to rule them all"!
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Though if Starlark is your thing, do checkout out skycfg[1]
[0] - https://github.com/bazelbuild/rules_jsonnet
[1] - https://github.com/stripe/skycfg
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The Dhall Configuration Language
Can you say more about what GCL does better than all of the open source ones?
Anecdotally, I've heard a lot of GCL horror stories, and many Xooglers have chosen to create things like Jsonnet or Skycfg (https://github.com/stripe/skycfg) instead.
- YAML: It's Time to Move On
- Opinion-driven design
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Migrating Millions of Concurrent WebSockets to Envoy
If you’re looking at other solutions check out https://github.com/stripe/skycfg It works with Envoy and lots of other things that support protobuf configs
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Yaml Is The Worst Thing Ever Created K8s Should
This is good and there are several other options like https://github.com/stripe/skycfg#why-use-skycfg to add full language support (using Go or python for ex) to configurations.
nestedtext
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The yaml document from hell
As /u/astatine said, an excellent but under-recognized alternative syntax for configuration files is NestedText, where everything is a string unless the ingesting code says otherwise, and there is no escaping needed ever.
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Yaml: First Class Citizen?
I don't know what traits from markdown you'd hope for, but for a relatively obscure but technically excellent format, you can check out NestedText.
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A Nigthtmare called YML
I recently came to appreciate and favor an alternative format called NestedText. Like YAML, indentation is used for structure, so like YAML, you may hate it.
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nt2: a CLI converter between NestedText and JSON, YAML, or TOML
I recently discovered NestedText, and really appreciate the design. To me, it hits the nail on the head where projects like strictyaml and hjson come very close.
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YAML: It's Time to Move On
I'm glad to see people experimenting with alternative document/object representations, but this one might be a hard sell: based on the README[1], it only has Python, Zig and Janet implementations so far. One of the nice things about YAML (and JSON, TOML, etc.) is that they have decently mature C, C++, or Rust libraries that other languages bind to.
[1]: https://github.com/KenKundert/nestedtext
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My two favorite things share the same love as me for YAML!
NestedText
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Json alternatives
NestedText was left out. Has the feel of YaML, without all the complexity and user traps.
- KenKundert/nestedtext ... Human Readable and Writable Data Interchange Format
What are some alternatives?
jsonnet - Jsonnet - The data templating language
strictyaml - Type-safe YAML parser and validator.
isopod - An expressive DSL and framework for Kubernetes configuration without YAML
sublime-json5 - JSON5 support for Sublime Text
ron - Rusty Object Notation
yaml-reference-parser
rules_jsonnet - Jsonnet rules for Bazel
dhall-lang - Maintainable configuration files
starlark - Starlark Language
jq - Command-line JSON processor [Moved to: https://github.com/jqlang/jq]
kubernetes-mixin - A set of Grafana dashboards and Prometheus alerts for Kubernetes.
json5 - JSON5 — JSON for Humans