DotCi defines three new extension points

Add new build type, this would be populated in the build type dropdown.

Eg:

@Extension
public class DockerImageBuild extends BuildType implements SubBuildRunner {
   @Override
    public String getDescription() {
        return "Docker Build";
    }

    @Override
    public Result runBuild(DynamicBuild build, BuildExecutionContext buildExecutionContext, Launcher launcher, BuildListener listener) throws IOException, InterruptedException {
    }
}

Add new notifications is done by extending PostBuildNotifier

Eg: Adding a hipchat notifier in notifications section of .ci.yml

  @Extension
public class HipchatNotifier extends PostBuildNotifier {
    public HipchatNotifier() {
        super("hipchat");
    }
    @Override
    public boolean notify(DynamicBuild build, BuildListener listener) {
      //notify hipchat room
    }

Adding a new plugin for use through plugins section of .ci.yml is done by extending DotCiPluginAdapter

Eg: Adding cobertura to plugins section

@Extension
public class CoberturaPluginAdapter extends DotCiPluginAdapter {

    public CoberturaPluginAdapter() {
        super("cobertura", "target/site/cobertura/coverage.xml");
    }

    @Override
    public boolean perform(DynamicBuild dynamicBuild, Launcher launcher, BuildListener listener) {
        CoberturaPublisher publisher = new CoberturaPublisher(pluginInputFiles, false, false, false, false, false, false, false, null, 0);

        try {
            return publisher.perform(((AbstractBuild) dynamicBuild), launcher, listener);
        } catch (Exception e) {
            e.printStackTrace(listener.getLogger());
            return false;
        }
    }

}