daemon-m39/src/main/java/org/apache/maven/cli/DaemonMavenCli.java [598:692]:
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                        eventSpyDispatcher,
                        container.lookup(ModelProcessor.class),
                        createTransferListener(cliRequest),
                        buildEventListener,
                        executionListener);
                executionRequestPopulator.populateDefaults(cliRequest.request);
                BootstrapCoreExtensionManager resolver = container.lookup(BootstrapCoreExtensionManager.class);
                return Collections.unmodifiableList(
                        resolver.loadCoreExtensions(cliRequest.request, providedArtifacts, extensions));
            } finally {
                executionRequestPopulator = null;
                container.dispose();
            }
        } catch (RuntimeException e) {
            // runtime exceptions are most likely bugs in maven, let them bubble up to the user
            throw e;
        } catch (Exception e) {
            slf4jLogger.warn("Failed to load extensions descriptor {}: {}", extensions, e.getMessage());
        }
        return Collections.emptyList();
    }

    private ClassRealm setupContainerRealm(
            ClassWorld classWorld, ClassRealm coreRealm, List<File> extClassPath, List<CoreExtensionEntry> extensions)
            throws Exception {
        if (!extClassPath.isEmpty() || !extensions.isEmpty()) {
            ClassRealm extRealm = classWorld.newRealm("maven.ext", null);
            extRealm.setParentRealm(coreRealm);
            slf4jLogger.debug("Populating class realm {}", extRealm.getId());
            for (File file : extClassPath) {

                extRealm.addURL(file.toURI().toURL());
            }
            for (CoreExtensionEntry entry : reverse(extensions)) {
                Set<String> exportedPackages = entry.getExportedPackages();
                ClassRealm realm = entry.getClassRealm();
                for (String exportedPackage : exportedPackages) {
                    extRealm.importFrom(realm, exportedPackage);
                }
                if (exportedPackages.isEmpty()) {
                    // sisu uses realm imports to establish component visibility
                    extRealm.importFrom(realm, realm.getId());
                }
            }
            return extRealm;
        }
        return coreRealm;
    }

    private static <T> List<T> reverse(List<T> list) {
        List<T> copy = new ArrayList<>(list);
        Collections.reverse(copy);
        return copy;
    }

    private List<File> parseExtClasspath(CliRequest cliRequest) {
        String extClassPath = cliRequest.userProperties.getProperty(EXT_CLASS_PATH);
        if (extClassPath == null) {
            extClassPath = cliRequest.systemProperties.getProperty(EXT_CLASS_PATH);
        }

        List<File> jars = new ArrayList<>();

        if (extClassPath != null) {
            for (String jar : extClassPath.split(File.pathSeparator)) {
                File file = resolveFile(new File(jar), cliRequest.workingDirectory);
                slf4jLogger.debug("  Included {}", file);
                jars.add(file);
            }
        }

        return jars;
    }

    //
    // This should probably be a separate tool and not be baked into Maven.
    //
    private void encryption(CliRequest cliRequest) throws Exception {
        if (cliRequest.commandLine.hasOption(CLIManager.ENCRYPT_MASTER_PASSWORD)) {
            throw new UnsupportedOperationException("Unsupported option: " + CLIManager.ENCRYPT_MASTER_PASSWORD);
        } else if (cliRequest.commandLine.hasOption(CLIManager.ENCRYPT_PASSWORD)) {
            throw new UnsupportedOperationException("Unsupported option: " + CLIManager.ENCRYPT_PASSWORD);
        }
    }

    private void environment(String workingDir, Map<String, String> clientEnv) {
        EnvHelper.environment(workingDir, clientEnv);
    }

    private int execute(CliRequest cliRequest) throws MavenExecutionRequestPopulationException {
        commands(cliRequest);

        MavenExecutionRequest request = executionRequestPopulator.populateDefaults(cliRequest.request);

        eventSpyDispatcher.onEvent(request);
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daemon-m40/src/main/java/org/apache/maven/cli/DaemonMavenCli.java [674:768]:
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                        eventSpyDispatcher,
                        container.lookup(ModelProcessor.class),
                        createTransferListener(cliRequest),
                        buildEventListener,
                        executionListener);
                executionRequestPopulator.populateDefaults(cliRequest.request);
                BootstrapCoreExtensionManager resolver = container.lookup(BootstrapCoreExtensionManager.class);
                return Collections.unmodifiableList(
                        resolver.loadCoreExtensions(cliRequest.request, providedArtifacts, extensions));
            } finally {
                executionRequestPopulator = null;
                container.dispose();
            }
        } catch (RuntimeException e) {
            // runtime exceptions are most likely bugs in maven, let them bubble up to the user
            throw e;
        } catch (Exception e) {
            slf4jLogger.warn("Failed to load extensions descriptor {}: {}", extensions, e.getMessage());
        }
        return Collections.emptyList();
    }

    private ClassRealm setupContainerRealm(
            ClassWorld classWorld, ClassRealm coreRealm, List<File> extClassPath, List<CoreExtensionEntry> extensions)
            throws Exception {
        if (!extClassPath.isEmpty() || !extensions.isEmpty()) {
            ClassRealm extRealm = classWorld.newRealm("maven.ext", null);
            extRealm.setParentRealm(coreRealm);
            slf4jLogger.debug("Populating class realm {}", extRealm.getId());
            for (File file : extClassPath) {

                extRealm.addURL(file.toURI().toURL());
            }
            for (CoreExtensionEntry entry : reverse(extensions)) {
                Set<String> exportedPackages = entry.getExportedPackages();
                ClassRealm realm = entry.getClassRealm();
                for (String exportedPackage : exportedPackages) {
                    extRealm.importFrom(realm, exportedPackage);
                }
                if (exportedPackages.isEmpty()) {
                    // sisu uses realm imports to establish component visibility
                    extRealm.importFrom(realm, realm.getId());
                }
            }
            return extRealm;
        }
        return coreRealm;
    }

    private static <T> List<T> reverse(List<T> list) {
        List<T> copy = new ArrayList<>(list);
        Collections.reverse(copy);
        return copy;
    }

    private List<File> parseExtClasspath(CliRequest cliRequest) {
        String extClassPath = cliRequest.userProperties.getProperty(EXT_CLASS_PATH);
        if (extClassPath == null) {
            extClassPath = cliRequest.systemProperties.getProperty(EXT_CLASS_PATH);
        }

        List<File> jars = new ArrayList<>();

        if (extClassPath != null) {
            for (String jar : extClassPath.split(File.pathSeparator)) {
                File file = resolveFile(new File(jar), cliRequest.workingDirectory);
                slf4jLogger.debug("  Included {}", file);
                jars.add(file);
            }
        }

        return jars;
    }

    //
    // This should probably be a separate tool and not be baked into Maven.
    //
    private void encryption(CliRequest cliRequest) throws Exception {
        if (cliRequest.commandLine.hasOption(CLIManager.ENCRYPT_MASTER_PASSWORD)) {
            throw new UnsupportedOperationException("Unsupported option: " + CLIManager.ENCRYPT_MASTER_PASSWORD);
        } else if (cliRequest.commandLine.hasOption(CLIManager.ENCRYPT_PASSWORD)) {
            throw new UnsupportedOperationException("Unsupported option: " + CLIManager.ENCRYPT_PASSWORD);
        }
    }

    private void environment(String workingDir, Map<String, String> clientEnv) {
        EnvHelper.environment(workingDir, clientEnv);
    }

    private int execute(CliRequest cliRequest) throws MavenExecutionRequestPopulationException {
        commands(cliRequest);

        MavenExecutionRequest request = executionRequestPopulator.populateDefaults(cliRequest.request);

        eventSpyDispatcher.onEvent(request);
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