// a parameter.

                value = properties.get(expression);
            }
        }

        if (value instanceof String) {
            // TODO without #, this could just be an evaluate call...

            String val = (String) value;

            int exprStartDelimiter = val.indexOf("${");

            if (exprStartDelimiter >= 0) {
                if (exprStartDelimiter > 0) {

corresponding java.util.logging.Logger instance. LogKit from Apache's Avalon project. Each named Log instance is connected to a corresponding LogKit Logger. NoOpLog implementation that simply swallows all log output, for all named Log instances. SimpleLog implementation that writes all log output, for all named Log instances, to System.err. Quick Start Guide For those impatient to just get on with it, the following example illustrates the typical declaration and use of a logger that is named (by convention)...

    }

    @Test
    void testReadModifiedPoms(@TempDir Path tempDir) throws Exception {
        // TODO a similar test should be created to test the dependency management (basically all usages
        // of DefaultModelBuilder.getCache() are affected by MNG-6530

        FileUtils.copyDirectory(new File("src/test/resources/projects/grandchild-check"), tempDir.toFile());

    //      mojo descriptor which comes back. All the free form parsing needs to be done somewhere else, this is
    //      really the function of the CLI, and then the pre-processing of that output still needs to be fed into
    //      a hinting process which helps flesh out the full specification of the plugin. The plugin manager should
    //      only deal in concrete terms -- all version finding mumbo jumbo is a customization to base functionality

 * or module hierarchy, but not module source hierarchy. The latter is excluded because this class
 * is for path elements of compiled codes.
 */
class PathModularization {
    /**
     * A unique constant for all non-modular dependencies.
     */
    public static final PathModularization NONE = new PathModularization();

    /**
     * Name of the file to use as a sentinel value for deciding if a directory or a JAR is modular.

These particular phases in a plugin’s lifecycle can probably be generalized to all plugins so could be something implemented in all plugins. Here we could have the descriptor either point to methods for each of these phases to execute or we could create a lifecycle in Plexus for these phases.

import org.eclipse.aether.version.VersionScheme;

/**
 * A simple memorizing {@link Supplier} of {@link RepositorySystem} instance, that on first call
 * supplies lazily constructed instance, and on each subsequent call same instance. Hence, this instance should be
 * thrown away immediately once repository system was created and there is no need for more instances. If new

- how to categorize the problems so that the id of the problem can be match to a page with descriptive help and the test
  project
- nice little sample projects that could be run in the core as well as integration tests

All Possible Errors
- invalid lifecycle phase (maybe same as bad CLI param, though you were talking about embedder too)
- <module> specified is not found
- malformed settings
- malformed POM
- local repository not writable

    comprehension tool. Based on the concept of a project object model:
    builds, dependency management, documentation creation, site
    publication, and distribution publication are all controlled from
    the declarative file. Maven can be extended by plugins to utilise a
    number of other development tools for reporting or the build
    process.
  </description>
  <url>http://maven.apache.org/</url>

        Xpp3Dom httpConfiguration = new Xpp3Dom("httpConfiguration");
        Xpp3Dom all = new Xpp3Dom("all");
        Xpp3Dom connectTimeoutConfiguration = new Xpp3Dom("connectionTimeout");
        connectTimeoutConfiguration.setValue("3000");

        all.addChild(connectTimeoutConfiguration);
        httpConfiguration.addChild(all);
        configuration.addChild(httpConfiguration);