public void execute()

in src/main/java/org/apache/maven/plugins/help/SystemMojo.java [56:107]
44 lines of code
5 McCabe index (conditional complexity)

    public void execute() throws MojoExecutionException {
        StringBuilder message = new StringBuilder();

        message.append(LS);
        message.append(StringUtils.repeat("=", LINE_LENGTH)).append(LS);
        message.append(StringUtils.repeat("=", REPEAT));
        message.append(" Platform Properties Details ");
        message.append(StringUtils.repeat("=", REPEAT)).append(LS);
        message.append(StringUtils.repeat("=", LINE_LENGTH)).append(LS);
        message.append(LS);

        message.append(StringUtils.repeat("=", LINE_LENGTH)).append(LS);
        message.append("System Properties").append(LS);
        message.append(StringUtils.repeat("=", LINE_LENGTH)).append(LS);

        Properties systemProperties = System.getProperties();
        for (String key : systemProperties.stringPropertyNames()) {
            message.append(LS);
            message.append(key).append("=").append(systemProperties.getProperty(key));
        }

        message.append(LS).append(LS);
        message.append(StringUtils.repeat("=", LINE_LENGTH)).append(LS);
        message.append("Environment Variables").append(LS);
        message.append(StringUtils.repeat("=", LINE_LENGTH)).append(LS);
        Properties envVars = CommandLineUtils.getSystemEnvVars();
        for (String key : envVars.stringPropertyNames()) {
            message.append(LS);
            message.append(key).append("=").append(envVars.getProperty(key));
        }

        message.append(LS);

        if (output != null) {
            StringBuilder sb = new StringBuilder();
            sb.append("Generated by Maven Help Plugin").append(LS);
            sb.append("See: https://maven.apache.org/plugins/maven-help-plugin/")
                    .append(LS)
                    .append(LS);
            sb.append(message.toString());

            try {
                writeFile(output, sb);
            } catch (IOException e) {
                throw new MojoExecutionException("Cannot write system report to output: " + output, e);
            }

            getLog().info("System report written to: " + output);
        } else {
            getLog().info(message);
        }
    }