open-feature-env-var 0.1.0

Environment Variable provider for OpenFeature
Documentation

Environment Variables Provider

This Rust library provides a feature flag provider that resolves feature flags from environment variables.

Supported Types

The provider supports the following types:

  • Int
  • Float
  • String
  • Bool

Please note that Struct type is not currently supported yet.

Error Handling

The provider will return EvaluationResult::Err(EvaluationError) if the flag is not found or if the value is not of the expected type.

Usage

Add this to your Cargo.toml:

[dependencies]
open-feature-env-var = "0.1.0"

Example


let mut api = OpenFeature::singleton_mut().await;
let provider  = EnvVarProvider::default();
api.set_provider(provider).await;
let client = api.create_named_client("env-var-client");

let mut message =  "Hello rustaceans!";
let is_feature_enabled = client.get_bool_value("env-flag-key", &EvaluationContext::default(), None).await.unwrap_or(false);

if is_feature_enabled {
    message = "Hello rustaceans from feature flag!";
}

Testing

Run cargo test to execute tests.

Maintainers

License

Apache 2.0 - See LICENSE for more information.