All functionality-wise credits go to github.com: jk1/Gradle-License-Report. This repository does only provide an example on how to use the plugin.
This repository holds a basic example for scanning a gradle project for licenses that can't be used in proprietary projects.
DISCLAIMER: THIS IS NOT LEGAL ADVICE NOR DOES THIS LIST CLAIM TO BE EXHAUSTIVE.
FEEL FREE TO OPEN A PULL REQUEST TO SUBMIT ADDITIONAL LICENSES THAT DO NOT REQUIRE TO DISCLOSE SOURCE CODE.
You can execute the license scan by executing gradle checkLicense on the command line.
A report is generated under ${projectDir}/build/reports/dependency-license/index.html which can be opened with any
browser.
Try adding the commented out projects and see the checkLicense task failing. Also have a look on the report.