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uniffi-bindgen-go - UniFFI Go bindings generator

Generate UniFFI bindings for Go. uniffi-bindgen-go lives as a separate project from uniffi-go, as per uniffi-rs #1355. Currently, uniffi-bindgen-go uses uniffi-rs version 0.25.0.

How to install

Minimum Rust version required to install uniffi-bindgen-go is 1.70. Newer Rust versions should also work fine.

cargo install uniffi-bindgen-go --git https://github.com/NordSecurity/uniffi-bindgen-go --tag v0.2.2+v0.25.0

How to generate bindings

uniffi-bindgen-go path/to/definitions.udl

Generates bindings file path/to/uniffi/definitions/definitions.go

Linking

You will need to make sure the compiled Rust binaries are in your LD_LIBRARY_PATH (set this to target/release/ if you have built with the --release flag, for instance).

You can also create a script to properly link these bindings - see test_bindings.sh in the root of this repository for an example.

How to integrate bindings

To integrate the bindings into your projects, simply add the generated bindings file to your project. Generated bindings require Go 1.19 or later to compile.

Configuration options

It's possible to configure some settings by passing --config argument to the generator

uniffi-bindgen-go path/to/definitions.udl --config path/to/uniffi.toml

Versioning

uniffi-bindgen-go is versioned separately from uniffi-rs. UniFFI follows the SemVer rules from the Cargo Book which states "Versions are considered compatible if their left-most non-zero major/minor/patch component is the same". A breaking change is any modification to the Go bindings that demands the consumer of the bindings to make corresponding changes to their code to ensure that the bindings continue to function properly. uniffi-bindgen-go is young, and its unclear how stable the generated bindings are going to be between versions. For this reason, major version is currently 0, and most changes are probably going to bump minor version.

To ensure consistent feature set across external binding generators, uniffi-bindgen-go targets a specific uniffi-rs version. A consumer using Go bindings (in uniffi-bindgen-go) and Go bindings (in uniffi-bindgen-go) expects the same features to be available across multiple bindings generators. This means that the consumer should choose external binding generator versions such that each generator targets the same uniffi-rs version.

To simplify this choice uniffi-bindgen-cs and uniffi-bindgen-go use tag naming convention as follows: vX.Y.Z+vA.B.C, where X.Y.Z is the version of the generator itself, and A.B.C is the version of uniffi-rs it is based on.

The table shows uniffi-rs version history for tags that were published before tag naming convention described above was introduced.

Documentation

More documentation is available in docs directory.

Contributing

For contribution guidelines, read CONTRIBUTING.md.