public void execute()

in nbm-maven-plugin/src/main/java/org/apache/netbeans/nbm/RunNetBeansMojo.java [94:223]
115 lines of code
25 McCabe index (conditional complexity)

    public void execute() throws MojoExecutionException, MojoFailureException {
        netbeansUserdir.mkdirs();

        List<File> clusters = new ArrayList<>();
        if (!clusterBuildDir.exists() || clusterBuildDir.listFiles() == null) {
            throw new MojoExecutionException(
                    "No clusters to include in execution found. Please run the nbm:cluster or nbm:cluster-app goals before this one.");
        }
        File[] fls = clusterBuildDir.listFiles();
        for (File fl : fls) {
            if (fl.isDirectory()) {
                clusters.add(fl);
            }
        }
        StringBuilder buff = new StringBuilder();
        for (File cluster : clusters) {
            buff.append(cluster.getAbsolutePath());
            buff.append(":");
        }
        if (buff.lastIndexOf(":") > -1) {
            buff.deleteCharAt(buff.lastIndexOf(":"));
        }

        getLog().debug("cluster path:\n" + buff);

        //now check what the exec names are to figure the right XXX.clusters name
        File binDir = new File(netbeansInstallation, "bin");
        File[] execs = binDir.listFiles();
        String appName = null;
        if (execs != null) {
            for (File f : execs) {
                String name = f.getName();
                if (name.contains("_w.exe")) {
                    continue;
                }
                name = name.replaceFirst("(64)?([.]exe)?$", "");
                if (!name.contains(".")) {
                    if (appName == null) {
                        appName = name;
                    } else {
                        if (!appName.equals(name)) {
                            getLog().debug("When examining executable names, found clashing results " + f.getName()
                                    + " " + appName);
                        }
                    }
                }
            }
        }
        if (appName == null) {
            appName = "netbeans";
        }

        //https://bz.apache.org/netbeans/show_bug.cgi?id=174819
        StringReader sr = new StringReader(appName + "_extraclusters=\"" + buff + "\"\n"
                + "extraclusters=\""
                + buff + "\"\n" + "extra_clusters=\"" + buff + "\"");

        // write XXX.conf file with cluster information...
        File etc = new File(netbeansUserdir, "etc");
        etc.mkdirs();
        File confFile = new File(etc, appName + ".conf");
        try (FileOutputStream conf = new FileOutputStream(confFile)) {
            IOUtil.copy(sr, conf);
        } catch (IOException ex) {
            throw new MojoExecutionException("Error writing " + confFile, ex);
        }

        if (getLog().isDebugEnabled()) {
            try (InputStream io = new FileInputStream(confFile)) {
                getLog().debug("Configuration file content:\n" + IOUtil.toString(io));
            } catch (IOException ex) {
                throw new MojoExecutionException("Error writing " + confFile, ex);
            }
        }

        boolean windows = Os.isFamily("windows");
        Commandline cmdLine = new Commandline();
        File exec;
        if (windows) {
            exec = new File(netbeansInstallation, "bin\\nb.exe");
            if (!exec.exists()) {
                // in 6.7 and onward, there's no nb.exe file.
                exec = new File(netbeansInstallation, "bin\\" + appName + ".exe");
                String jdkHome = System.getenv("JAVA_HOME");
                if (jdkHome != null) {
                    if (new File(jdkHome, "jre\\lib\\amd64\\jvm.cfg").exists()
                            || new File(jdkHome, "bin\\windowsaccessbridge-64.dll").exists()) {
                        File exec64 = new File(netbeansInstallation, "bin\\" + appName + "64.exe");
                        if (exec64.isFile()) {
                            exec = exec64;
                        }
                    }
                }
                cmdLine.addArguments(new String[]{
                    "--console", "suppress"
                });
            }
        } else {
            exec = new File(netbeansInstallation, "bin/" + appName);
        }
        cmdLine.setExecutable(exec.getAbsolutePath());

        try {
            String[] args = new String[]{
                //TODO --jdkhome
                "--userdir",
                netbeansUserdir.getAbsolutePath(),
                "-J-Dnetbeans.logger.console=true",
                "-J-ea",};
            cmdLine.addArguments(args);
            getLog().info("Additional arguments=" + additionalArguments);
            cmdLine.addArguments(CommandLineUtils.translateCommandline(additionalArguments));
            cmdLine.addArguments(CommandLineUtils.translateCommandline(getDebugAdditionalArguments()));
            for (int i = 0; i < cmdLine.getArguments().length; i++) {
                getLog().info("      " + cmdLine.getArguments()[i]);
            }
            getLog().info("Executing: " + cmdLine);
            StreamConsumer out = new StreamConsumer() {

                @Override
                public void consumeLine(String line) {
                    getLog().info(line);
                }
            };
            CommandLineUtils.executeCommandLine(cmdLine, out, out);

        } catch (Exception e) {
            throw new MojoExecutionException("Failed executing NetBeans", e);
        }
    }