public void execute()

in src/main/java/org/apache/maven/plugins/assembly/archive/phase/FileItemAssemblyPhase.java [69:156]
69 lines of code
14 McCabe index (conditional complexity)

    public void execute(
            final Assembly assembly, final Archiver archiver, final AssemblerConfigurationSource configSource)
            throws ArchiveCreationException, AssemblyFormattingException, InvalidAssemblerConfigurationException {
        final List<FileItem> fileList = assembly.getFiles();
        final File basedir = configSource.getBasedir();

        for (final FileItem fileItem : fileList) {
            if (fileItem.getSource() != null ^ fileItem.getSources().isEmpty()) {
                throw new InvalidAssemblerConfigurationException(
                        "Misconfigured file: one of source or sources must be set");
            }

            String destName = fileItem.getDestName();

            final String sourcePath;
            if (fileItem.getSource() != null) {
                sourcePath = fileItem.getSource();
            } else if (destName != null) {
                // because createResource() requires a file
                sourcePath = fileItem.getSources().get(0);
            } else {
                throw new InvalidAssemblerConfigurationException(
                        "Misconfigured file: specify destName when using sources");
            }

            // ensure source file is in absolute path for reactor build to work
            File source = new File(sourcePath);

            // save the original sourcefile's name, because filtration may
            // create a temp file with a different name.
            final String sourceName = source.getName();

            if (!AssemblyFileUtils.isAbsolutePath(source)) {
                source = new File(basedir, sourcePath);
            }
            if (destName == null) {
                destName = sourceName;
            }

            final String outputDirectory1 = fileItem.getOutputDirectory();

            final String outputDirectory = AssemblyFormatUtils.getOutputDirectory(
                    outputDirectory1,
                    configSource.getFinalName(),
                    configSource,
                    AssemblyFormatUtils.moduleProjectInterpolator(configSource.getProject()),
                    AssemblyFormatUtils.artifactProjectInterpolator(null));

            String target;

            // omit the last char if ends with / or \\
            if (outputDirectory.endsWith("/") || outputDirectory.endsWith("\\")) {
                target = outputDirectory + destName;
            } else if (outputDirectory.length() < 1) {
                target = destName;
            } else {
                target = outputDirectory + "/" + destName;
            }

            try {
                final InputStreamTransformer fileSetTransformers = ReaderFormatter.getFileSetTransformers(
                        configSource, fileItem.isFiltered(), Collections.emptySet(), fileItem.getLineEnding());

                final PlexusIoResource restoUse;
                if (!fileItem.getSources().isEmpty()) {
                    List<InputStream> content =
                            new ArrayList<>(fileItem.getSources().size());
                    for (String contentSourcePath : fileItem.getSources()) {
                        File contentSource = new File(contentSourcePath);
                        if (!AssemblyFileUtils.isAbsolutePath(contentSource)) {
                            contentSource = new File(basedir, contentSourcePath);
                        }
                        content.add(Files.newInputStream(contentSource.toPath()));
                    }

                    String name = PlexusIoFileResource.getName(source);
                    restoUse = createResource(source, name, getContentSupplier(content), fileSetTransformers);
                } else {
                    restoUse = createResource(source, fileSetTransformers);
                }

                int mode = TypeConversionUtils.modeToInt(fileItem.getFileMode(), LOGGER);
                archiver.addResource(restoUse, target, mode);
            } catch (final ArchiverException | IOException e) {
                throw new ArchiveCreationException("Error adding file to archive: " + e.getMessage(), e);
            }
        }
    }