expr
cel-spec
expr | cel-spec | |
---|---|---|
5 | 9 | |
5,609 | 2,389 | |
3.0% | 2.5% | |
9.5 | 7.5 | |
6 days ago | 3 days ago | |
Go | Go | |
MIT License | Apache License 2.0 |
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expr
- Expr 1.16.5
- Expr 1.16
- Expr Release v1.15.8
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SQL as API
You're basically creating an expression language: https://github.com/expr-lang/expr
- Expr moved to expr-lang/expr
cel-spec
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Apple releases Pkl – onfiguration as code language
My employer uses a combination of Protocol Buffers (for the config schema definition) and Bazel/Starlark (for concrete instantiations). Configs are validated at build time and runtime using CEL (https://github.com/google/cel-spec).
- SQL as API
- AWS Creates New Policy-Based Access Control Language Cedar
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CEL for admission controller with ValidatingAdmissionPolicy in K8s 1.26
The Common Expression Language (CEL) implements common semantics for expression evaluation, enabling different applications to more easily interoperate. https://github.com/google/cel-spec
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Pure Ruby implementation of Google Common Expression Language
Looks like Google invented a specification for a simple "expression language." -> https://github.com/google/cel-spec/blob/master/doc/langdef.md. Writing the expressions feels like writing Java, C++, Go, or TypeScript code. Google then released C++ and Go versions of this langauge as a library.
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A library for evaluating expressions like Google Common Expression Language but for Java
https://github.com/google/cel-spec unfortunately, it's in Go or C++. Of course I can write a binding to them. But is there any other similar that you would know of for Java? My other course of action would be to offload computation to another service using this library in Go, or Jsonnet or Open Policy Agent/Rego based evaluation, which I'd prefer not to. Executing JS in Java via Nashorn also an option but it'd be heavy weight.
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JsonLogic
Having a standard way to share expressions does seem quite useful, especially when it's multilingual.
[0]: https://github.com/google/cel-spec
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Google Cloud: IAM Conditions
There's more information about CEL and its specifications here
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Question about setting up multiple applications using nginx.
Especially when dealing with more complex match rules, I personally much prefer Caddy's matchers over building some weird-ass if constructs in Nginx. It also supports CEL for request matching, giving you access to extremely powerful logic, if you need it.
What are some alternatives?
govaluate - Arbitrary expression evaluation for golang
jsonlogic - Go Lang implementation of JsonLogic
cel-go - Fast, portable, non-Turing complete expression evaluation with gradual typing (Go)
json-logic-js - Build complex rules, serialize them as JSON, and execute them in JavaScript
grule-rule-engine - Rule engine implementation in Golang
json-logic-rs - JSONLogic implementation in Rust, accessible via Python and JS
go-exprtk - Go Mathematical Expression Toolkit. Run-time mathematical expression parser and evaluation engine.
jaspr - Modern web framework for building websites in Dart. Supports SPAs and SSR.
gval - Expression evaluation in golang
secure-json-logic - Use logic-objects from uncertain sources and run them locally without breaking the own system
tengo - A fast script language for Go
jsedn - javascript implementation of edn