sentry-protos

Protocol buffers and gRPC schema for cross-process communication. Contains tooling to generate python and rust client bindings.

📗 Notion documentation

Defining schemas

Message schemas are defined in the protos directory. Messages and services are organized by service or product ___domain and version.

All proto files are required to define a package that reflects the filesystem path to the proto file, and must end in a version specifier.

Backwards compatibility

We use buf lint to validate that changes to existing schemas are backwards compatible with previously published schemas. If breaking changes are required it is recommended to create a new version package instead of trying to ship a potentially breaking change.

Unstable versions

While features are in development, we occasionally need to break backwards compatibility. Any proto packages that end in alpha, beta, or test are exempt from breaking change validation.

For example: sentry_protos.sentry.confabulator.v1test would not be subject to backwards compatibility.

Local development workflow

sentry-protos makes it easy to develop and test protobuf/grpc changes locally before making pull requests.

You'll need a local clone of this repository to start.

Python

From the root of sentry-protos run:

make build-py

Then in your application install the python bindings with pip.

# CWD is in your python application
pip install -e ../sentry-protos/py

As you make changes to proto files, you will need to regenerate bindings with make build-py.

Rust

From the root of sentry-protos run:

make build-rust

Your application's Cargo.toml will need the following:

[dependencies]
sentry_protos = "0.1.0"

[patch.crates-io]
sentry_protos = { path = "../sentry-protos/rust/" }

Rust conventions

Rust code generation applies some naming conventions that you need to keep in mind when consuming generated code.

Enums within Messages

Enums that are nested within messages will be hoisted into a namespace matching the snake_case name of the message. For example:

// Defined in sentry_protos/snuba/v1alpha/trace_item_attribute.proto
message AttributeKey {
  enum Type {
    TYPE_UNSPECIFIED = 0;
    TYPE_BOOLEAN = 1;
  }
}

The Type enum would be available as sentry_protos::snuba::v1alpha::attribute_key::Type. While AttributeKey can be imported from sentry_protos::snuba::v1alpha::AttributeKey.

Releasing

Use the release workflow in GitHub actions to create new releases. Each time a release is created, packages will be published for each supported language.

In this repo, click on Actions:

Select release

click Run Workflow to create a new release, update version according to semver guidelines