private static CpdResult fork()

in src/main/java/org/apache/maven/plugins/pmd/exec/CpdExecutor.java [74:111]
33 lines of code
5 McCabe index (conditional complexity)

    private static CpdResult fork(CpdRequest request) throws MavenReportException {
        File basePmdDir = new File(request.getTargetDirectory(), "pmd");
        basePmdDir.mkdirs();
        File cpdRequestFile = new File(basePmdDir, "cpdrequest.bin");
        try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(cpdRequestFile))) {
            out.writeObject(request);
        } catch (IOException e) {
            throw new MavenReportException(e.getMessage(), e);
        }

        String classpath = buildClasspath();
        ProcessBuilder pb = new ProcessBuilder();
        // note: using env variable instead of -cp cli arg to avoid length limitations under Windows
        pb.environment().put("CLASSPATH", classpath);
        pb.command().add(request.getJavaExecutable());
        pb.command().add(CpdExecutor.class.getName());
        pb.command().add(cpdRequestFile.getAbsolutePath());

        LOG.debug("Executing: CLASSPATH={}, command={}", classpath, pb.command());
        try {
            final Process p = pb.start();
            // Note: can't use pb.inheritIO(), since System.out/System.err has been modified after process start
            // and inheritIO would only inherit file handles, not the changed streams.
            ProcessStreamHandler.start(p.getInputStream(), System.out);
            ProcessStreamHandler.start(p.getErrorStream(), System.err);
            int exit = p.waitFor();
            LOG.debug("CpdExecutor exit code: {}", exit);
            if (exit != 0) {
                throw new MavenReportException("CpdExecutor exited with exit code " + exit);
            }
            return new CpdResult(new File(request.getTargetDirectory(), "cpd.xml"), request.getOutputEncoding());
        } catch (IOException e) {
            throw new MavenReportException(e.getMessage(), e);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            throw new MavenReportException(e.getMessage(), e);
        }
    }