The Invoker Plugin is used to run a set of Maven projects. The plugin can determine whether each project execution is successful, and optionally can verify the output generated from a given project execution.
This plugin is in particular handy to perform integration tests for other Maven plugins. The Invoker Plugin can be employed to run a set of test projects that have been designed to assert certain features of the plugin under test.
The plugin has four goals meant to participate in the default build lifecycle:
This last goal is intended for usage with the site lifecycle:
General instructions on how to use the Invoker Plugin can be found on the usage page. Some more specific use cases are described in the examples given below. Last but not least, users occasionally contribute additional examples, tips or errata to the plugin's wiki page.
In case you still have questions regarding the plugin's usage, please have a look at the FAQ and feel free to contact the user mailing list. The posts to the mailing list are archived and could already contain the answer to your question as part of an older thread. Hence, it is also worth browsing/searching the mail archive.
If you feel like the plugin is missing a feature or has a defect, you can fill a feature request or bug report in our issue tracker. When creating a new issue, please provide a comprehensive description of your concern. Especially for fixing bugs it is crucial that the developers can reproduce your problem. For this reason, entire debug logs, POMs or most preferably little demo projects attached to the issue are very much appreciated. Of course, patches are welcome, too. Contributors can check out the project from our source repository and will find supplementary information in the guide to helping with Maven.
The following example configurations are available to illustrate selected use cases in more detail:
You can also study some real-life usages of the Invoker Plugin by browsing its own integration tests which are located in the directory src/it of the project source tree.