public void execute()

in src/main/java/org/apache/jackrabbit/filevault/maven/packaging/mojo/GenerateMetadataMojo.java [519:601]
64 lines of code
13 McCabe index (conditional complexity)

    public void execute() throws MojoExecutionException, MojoFailureException {
        if (buildContext.isIncremental()) {
            getLog().debug("Incremental build");
            // only execute in case of changes towards the filter.xml as the generated one contains a merge
            if (filterSource != null) {
                if (buildContext.hasDelta(filterSource)) {
                    getLog().debug("Detecting a change on " + getProjectRelativeFilePath(filterSource) + " therefore not cancelling build");
                } else {
                    getLog().debug(getProjectRelativeFilePath(filterSource) + " unchanged therefore cancelling build");
                    return;
                }
            } else {
                getLog().debug("No file change would be relevant therefore cancelling build");
                return;
            }
        }

        if (!failOnEmptyFilter) {
            getLog().warn("The parameter 'failOnEmptyFilter' is no longer supported and ignored. Every package must have a non-empty filter!");
        }
        final File vaultDir = getGeneratedVaultDir(true);
        vaultDir.mkdirs();

        // JCRVLT-331 share work directory to expose vault metadata between process-classes and package phases for
        // multi-module builds.
        getArtifactWorkDirectoryLookup(getPluginContext())
                .put(getModuleArtifactKey(project.getArtifact()), getWorkDirectory(true));

        try {
            // find the meta-inf source directory
            File metaInfDirectory = getMetaInfVaultSourceDirectory();
            
            // generate the filter.xml
            String sourceFilters = computeFilters(metaInfDirectory);
            computeImportPackage();

            // this must happen before the filter rules are extended 
            // but after filters have been consolidated
            if (packageType == null) {
                packageType = computePackageType();
            }

            // calculate the embeddeds and subpackages
            Map<String, File> embeddedFiles = getEmbeddeds();
            embeddedFiles.putAll(getSubPackages());
            
            // embed install hooks
            if (installHooks != null && !installHooks.isEmpty()) {
                for (ArtifactCoordinates installHook : installHooks) {
                    File installHookFile = resolveArtifact(installHook.toArtifact());
                    embeddedFiles.put(Constants.META_DIR + "/" + Constants.HOOKS_DIR + "/" + installHookFile.getName(), installHookFile);
                    getLog().info("Embed install hook " + installHookFile);
                }
            }
            setEmbeddedFilesMap(embeddedFiles);

            String dependenciesString = computeDependencies();
            String dependenciesLocations = computeDependenciesLocations();
            
            // generate properties.xml
            final Properties vaultProperties = computeProperties(dependenciesString, dependenciesLocations);
            try (FileOutputStream fos = new FileOutputStream(new File(vaultDir, Constants.PROPERTIES_XML))) {
                vaultProperties.storeToXML(fos, project.getName());
            }
            writeFilters(sourceFilters);
            copyFile("/vault/config.xml", new File(vaultDir, Constants.CONFIG_XML));
            copyFile("/vault/settings.xml", new File(vaultDir, Constants.SETTINGS_XML));
            File packageDefinitionXml = new File(vaultDir, Constants.PACKAGE_DEFINITION_XML);
            if (!packageDefinitionXml.getParentFile().exists()) {
                packageDefinitionXml.getParentFile().mkdir();
            }
            try (OutputStream output = new FileOutputStream( packageDefinitionXml )) {
                writePackageDefinition(output);
            }
            if (thumbnailImage != null && thumbnailImage.exists()) {
                FileUtils.copyFile(thumbnailImage, new File(packageDefinitionXml.getParentFile(), "thumbnail.png"));
            }
            writeManifest(getGeneratedManifestFile(true), dependenciesString, dependenciesLocations, vaultProperties);
        } catch (IOException | ManifestException | DependencyResolutionRequiredException | ConfigurationException | NamespaceException | XMLStreamException e) {
            throw new MojoExecutionException(e.toString(), e);
        }
        buildContext.refresh(vaultDir);
    }