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apollo-rs

Rust tooling for low-level manipulation of the GraphQL language.

Tools included

This project is intended to house a number of tools related to the low-level workings of GraphQL according to the GraphQL specification. Nothing in these libraries is specific to Apollo, and can freely be used by other projects which need standards-compliant GraphQL tooling written in Rust. The following crates currently exist:

  • apollo-compiler - a library to compile and semantically analyze GraphQL query language.
  • apollo-encoder - a library to generate GraphQL code (SDL).
  • apollo-parser - a library to parse the GraphQL query language.
  • apollo-smith - a test case generator to test GraphQL code (SDL).

Please check out their respective READMEs for usage examples.

Status

apollo-rs is a work in progress. Please check out the ROADMAP for upcoming features we are working on building.

If you do end up trying out apollo-rs and run into trouble, we encourage you to open an issue.

Design Principles

  1. Prioritizing developer experience. Elegant and ergonomic APIs is the theme for Rust as a language, and we want to make sure that all component APIs we provide are aligned with these principles.

  2. Stability and reliability. Spec-compliant, and idempotent APIs which, when complete, can be used safely in enterprise-grade codebases.

  3. Diagnostics. The tools are to be written in a way that will allow us to produce detailed diagnostics. It does not panic or return early if there is a lexical or a syntactic error. Instead, the parser is meant to gather as much context and information as possible and return errors alongside the output that is valid. Coincidentally, this allows for easily debuggable code for those maintaining this project.

  4. Extensibility. The parser is written to work with different use cases in our budding Rust GraphQL ecosystem, be it building schema-diagnostics for Rover, or writing out query planning and composition algorithms in Rust. These all have quite different requirements when it comes to AST manipulation. We wanted to make sure we account for them early on.

Rust versions

apollo-rs is tested on the latest stable version of Rust. Older version may or may not be compatible.

License

Licensed under either of

at your option.

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Spec compliant GraphQL Tools in Rust.

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