private void initConfiguration()

in tomcat8-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat8/run/AbstractRunMojo.java [1004:1083]
64 lines of code
10 McCabe index (conditional complexity)

    private void initConfiguration()
        throws IOException, MojoExecutionException, MavenFilteringException
    {
        if ( configurationDir.exists() )
        {
            getLog().info( messagesProvider.getMessage( "AbstractRunMojo.usingConfiguration", configurationDir ) );
        }
        else
        {
            getLog().info( messagesProvider.getMessage( "AbstractRunMojo.creatingConfiguration", configurationDir ) );

            configurationDir.mkdirs();

            File confDir = new File( configurationDir, "conf" );
            confDir.mkdir();

            if ( tomcatLoggingFile != null )
            {
                FileUtils.copyFile( tomcatLoggingFile, new File( confDir, "logging.properties" ) );
            }
            else
            {
                copyFile( "/conf/logging.properties", new File( confDir, "logging.properties" ) );
            }

            copyFile( "/conf/tomcat-users.xml", new File( confDir, "tomcat-users.xml" ) );
            if ( tomcatWebXml != null )
            {
                if ( !tomcatWebXml.exists() )
                {
                    throw new MojoExecutionException( " tomcatWebXml " + tomcatWebXml.getPath() + " not exists" );
                }
                //MTOMCAT-42  here it's a real file resources not a one coming with the mojo
                //MTOMCAT-128 apply filtering
                MavenFileFilterRequest mavenFileFilterRequest = new MavenFileFilterRequest();
                mavenFileFilterRequest.setFrom( tomcatWebXml );
                mavenFileFilterRequest.setTo( new File( confDir, "web.xml" ) );
                mavenFileFilterRequest.setMavenProject( project );
                mavenFileFilterRequest.setMavenSession( session );
                mavenFileFilterRequest.setFiltering( true );

                mavenFileFilter.copyFile( mavenFileFilterRequest );

            }
            else
            {
                copyFile( "/conf/web.xml", new File( confDir, "web.xml" ) );
            }

            File logDir = new File( configurationDir, "logs" );
            logDir.mkdir();

            File webappsDir = new File( configurationDir, "webapps" );
            webappsDir.mkdir();

            if ( additionalConfigFilesDir != null && additionalConfigFilesDir.exists() )
            {
                DirectoryScanner scanner = new DirectoryScanner();
                scanner.addDefaultExcludes();
                scanner.setBasedir( additionalConfigFilesDir.getPath() );
                scanner.scan();

                String[] files = scanner.getIncludedFiles();

                if ( files != null && files.length > 0 )
                {
                    getLog().info( "Coping additional tomcat config files" );

                    for ( int i = 0; i < files.length; i++ )
                    {
                        File file = new File( additionalConfigFilesDir, files[i] );

                        getLog().info( " copy " + file.getName() );

                        FileUtils.copyFileToDirectory( file, confDir );
                    }
                }
            }
        }
    }