target-cel

@cross-policy/target-cel

The @cross-policy/target-cel package provides a policy target for evaluating policies using the Common Expression Language (CEL). This uses the cel-js library to evaluate the policy.

For more information on how to write CEL expressions, please refer to the CEL documentation. Also make sure, check out the cel-js documentation for more information on which expressions are supported.

Getting Started

Installation

To install the @cross-policy/target-cel package, run the following command:

yarn add @cross-policy/target-cel

Usage

To create a callable policy using the CEL target, you need to create a CrossPolicy instance with the celPolicyTarget function from the @cross-policy/target-cel package.

import { createCrossPolicy } from "@cross-policy/core";
import { celPolicyTarget } from "@cross-policy/target-cel";
import { z } from "zod";

const crossPolicy = createCrossPolicy({
  target: celPolicyTarget({ expression: "input == 'test'" }),
  schema: z.object({ input: z.string() }),
});

const resultTest = await crossPolicy.evaluate({ input: "test" }); // true
const resultOther = await crossPolicy.evaluate({ input: "other" }); // false

This example demonstrates how to create a callable policy using the CEL target.