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Open Policy Agent plugin for Gradle

Total alerts Language grade: Java codecov Version

Plugin adding various tasks to help out integrating Open Policy Agent (OPA) in Gradle builds.

Install

Simply add the plugin to your build.gradle plugins declaration:

Version

plugins {
    id 'com.bisnode.opa' version '<see above>'
}

For legacy versions of Gradle, see instructions in the Gradle plugin directory.

Prerequisites: OPA installed on same machine as the tasks are run, either on $PATH or pointed out by the location configuration attribute (see Configuration below).

Configuration

The following configuration properties are made available by the plugin:

opa {
    location    = 'path/opa/executable'     // default: use opa on $PATH
    srcDir      = 'path/to/rego/src'        // default: src/main/rego
    testDir     = 'path/to/rego/tests/'     // default: src/test/rego
}

Tasks

The plugin adds the following tasks:

  • testRego - Runs opa test {srcDir} {testDir} (see below).
  • testRegoCoverage - Runs opa test {srcDir} {testDir} --coverage saving report in build/report/opa directory.
  • startOpa - Start OPA in background for subsequent tasks like integration tests.
  • stopOpa - Stop OPA process started by startOpa.

testRego

The testRego task runs the unit tests found in testDir with all policies provided in srcDir. If not provided, these directories default to src/main/rego (rego policies) and src/test/rego (rego tests) respectively.

When invoked with --info output similar to --info is printed to console.

Example: Example testRego output

JUnit XML test results

The testRego task automatically converts the OPA test command output into JUnit XML and writes the output to the build/tests-results/opa directory. This enables any tool or system (such as CI/CD servers) that knows how to parse JUnit test results to include the OPA test results when handling test outcomes, like when compiling test reports.

Example test report output in Atlassian Bamboo: Example test report output

Run Rego tests

To integrate policy tests into your regular Gradle pipeline you may add the testRego and/or testRegoCoverage tasks as dependencies of the check task:

check.dependsOn(testRego, testRegoCoverage)

Run OPA for integration tests

Just start/stop OPA before/after your test suite like this:

integrationTest.dependsOn startOpa
integrationTest.finalizedBy stopOpa

Contribution

Interested in contributing? Please, start by reading this document.

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Plugin adding various tasks to help out integrating Open Policy Agent (OPA) in Gradle builds.

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