SQL Compiler

SQLCompiler.java

package nl.sijmenhuizenga.sqlcompiler;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.function.Consumer;
import java.util.stream.Collectors;

/**
 * Created by sijmen on 7-12-2015.
 */
public class SqlCompiler {

    private static Map<String, String> map = new HashMap<>();
    private static ArrayList<String> ignores = new ArrayList<>();

    private static String output = "";

    private static void makeMap(String[] args) {
        for (String arg : args) {
            if (arg.contains("=")) {
                map.put(arg.substring(0, arg.indexOf('=')),
                        arg.substring(arg.indexOf('=') + 1));
            }
        }
    }

    public static void main(String[] args) throws IOException {
        makeMap(args);
        String base = map.containsKey("base") ? map.get("base") : "";
        if(map.containsKey("ignore")) {
            ignores = new ArrayList<String>(Arrays.asList(map.get("ignore").split(";")));
            for(String ingore : ignores){
                System.out.println("Ignoring: \t" + ingore);
            }
        }

        Files.walkFileTree(Paths.get(base), new SimpleFileVisitor<Path>() {
            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                if (!validateFile(file)) {
                    System.out.println("Excluding: \t" + file);
                    return super.visitFile(file, attrs);
                }
                System.out.println("Including: \t" + file);

                List<String> lines = Files.readAllLines(file, Charset.defaultCharset());
                lines.removeIf(s -> s.length() == 0);
                output += "--****************************************************************************--\n";
                output += "-- " + file + "\n";
                output += "--****************************************************************************--\n";

                output += String.join("\n", lines);
                output += "\ngo\n";

                return super.visitFile(file, attrs);
            }
        });

        DateFormat df = new SimpleDateFormat("yyyy-mm-dd HHmmss");
        Date today = Calendar.getInstance().getTime();
        String outputName = map.containsKey("output") ? map.get("output") : "bin/concat - "+ df.format(today)+".min.sql";
        System.out.println("Saving to \t" + outputName);
        Files.write(Paths.get(outputName), output.getBytes());

    }

    private static boolean validateFile(Path file) {
        if (file.getFileName().toString().endsWith(".min.sql"))
            return false;
        if (ignores.contains(file.getFileName().toString()))
            return false;
        if (file.getFileName().toString().startsWith("."))
            return false;
        if (!file.getFileName().toString().toLowerCase().endsWith(".sql"))
            return false;
        return true;
    }

}