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Parsing YAML files

This guide demonstrates an example of utilizing the @radekstepan/flare library to evaluate feature flags. The source of the gate data is a set of YAML files.

import { Flare } from "@radekstepan/flare";
import { yaml } from "@radekstepan/flare-utils";

This section imports the necessary modules from the @radekstepan/flare library, including Flare for feature flag evaluation and yaml for parsing YAML files.

const data = yaml.readYamlGates("fixtures/*.yml");

On this line, we're using the readYamlGates function to parse YAML files located in the fixtures directory (indicated by the fixtures/*.yml glob pattern). The paths are relative to the current working directory.

This function provides the data wrapped in a Promise.

const flare = new Flare(data);

Armed with this data, we can now instantiate a new Flare class object. This object accepts the Promise-containing data as an argument.

flare.evaluateAll({company: "acme"}).then((res) => {
  console.log(res);
});

Finally, we're calling the evaluateAll method on our flare instance. This method evaluates the data based on some context - in this case, the context is {company: "acme"}.