Can anyone give a good example of using org.apache.maven.cli.MavenCli programmatically?

Yeah, the's not much in the way of documentation of MavenCli. The API is significatly simpler but i'd still like some examples. Here's one that works...

MavenCli cli = new MavenCli();
int result = cli.doMain(new String[]{"compile"},
        "/home/aioffe/workspace/MiscMaven",
        System.out, System.out);
System.out.println("result: " + result);

It takes a dir and runs the 'compile' phase...

Working maven configuration for maven 3.6.3

Code

MavenCli cli = new MavenCli();
System.setProperty("maven.multiModuleProjectDirectory", workingDirectory);
cli.doMain(new String[]{"compile"}, workingDirectory, System.out, System.err);

Dependencies

<dependencies>
    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-embedder</artifactId>
        <version>3.6.3</version>
    </dependency>
    <!-- https://issues.apache.org/jira/browse/MNG-5995 -->
    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-compat</artifactId>
        <version>3.6.3</version>
    </dependency>

    <!-- enable logging -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.30</version>
    </dependency>
</dependencies>

The dependency matrix information for provided scopes and dynamically acquired components can be a bit confusing. It was for me, since it appeared to me that I got all the required items by direct or transitive dependency, but then remote resolution didn't work.

I wanted to jump to Maven 3.3.3 (latest as of 2015-05-25). I got it working without the sisu errors that presented when I tried to optimistically update to current versions of things specified here (and elsewhere). This is a project with a tag that worked with the example specified as of today using JDK8.

https://github.com/mykelalvis/test-maven-embedder/tree/20150525-working

Relevant deps (SLF4J is just so I can see the logs)

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.5</version>
    </dependency>
    <dependency>
        <groupId>org.apache.maven</groupId>
        <artifactId>maven-embedder</artifactId>
        <version>3.3.3</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.aether</groupId>
        <artifactId>aether-connector-basic</artifactId>
        <version>1.0.2.v20150114</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.aether</groupId>
        <artifactId>aether-transport-wagon</artifactId>
        <version>1.0.2.v20150114</version>
    </dependency>
    <dependency>
        <groupId>org.apache.maven.wagon</groupId>
        <artifactId>wagon-http</artifactId>
        <version>2.9</version>
    </dependency>
    <dependency>
        <groupId>org.apache.maven.wagon</groupId>
        <artifactId>wagon-provider-api</artifactId>
        <version>2.9</version>
    </dependency>
    <dependency>
        <groupId>org.apache.maven.wagon</groupId>
        <artifactId>wagon-http-lightweight</artifactId>
        <version>2.9</version>
    </dependency>   

Running this is:

rm -r ~/.m2/repository/org/apache/maven/plugins/maven-clean-plugin/
mvn exec:java

Probably should have made it a unit test of some sort.

If someone has a superior solution for embedded Maven 3.3.3 (i.e. came up with a smaller or more range-oriented set of required dependencies), please post them.