Add a very rudimentary command line program that will check the integrity (a very basic integrity check) of a world.

src/com/sk89q/worldedit/cli/Main.java

@@ -0,0 +1,94 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.cli;
+
+import static java.util.Arrays.*;
+import java.util.List;
+import joptsimple.OptionParser;
+import joptsimple.OptionSet;
+import joptsimple.OptionSpec;
+
+/**
+ * 
+ * @author sk89q
+ */
+public class Main {
+    /**
+     * @param args
+     */
+    public static void main(String[] _args) throws Throwable {
+        OptionParser parser = new OptionParser();
+        OptionSpec<String> world =
+                parser.accepts("world").withRequiredArg().ofType(String.class)
+                .describedAs("world directory").defaultsTo("world");
+        parser.acceptsAll(asList("?", "h"), "show help");
+
+        OptionSet options = parser.parse(_args);
+        List<String> args = options.nonOptionArguments();
+        
+        if (args.size() != 1 || options.has("?")) {
+            System.err.println("worldedit <action>");
+            System.err.println();
+            parser.printHelpOn(System.err);
+            return;
+        }
+
+        System.err.println("WorldEdit v" + getVersion());
+        System.err.println("Copyright (c) 2010-2011 sk89q <http://www.sk89q.com>");
+        System.err.println();
+        
+        String act = args.get(0);
+        String worldPath = options.valueOf(world);
+        
+        if (act.equalsIgnoreCase("check")) {
+            new WorldChecker(worldPath);
+        } else {
+            System.err.println("Only valid action is 'check'.");
+        }
+    }
+
+    /**
+     * Get the version.
+     * 
+     * @return
+     */
+    public static String getVersion() {
+        Package p = com.sk89q.worldedit.cli.Main.class.getPackage();
+
+        if (p == null) {
+            p = Package.getPackage("com.sk89q.worldedit");
+        }
+        
+        String version;
+
+        if (p == null) {
+            return "(unknown)";
+        } else {
+            version = p.getImplementationVersion();
+
+            if (version == null) {
+                return "(unknown)";
+            }
+        }
+
+        return version;
+    }
+
+}

src/com/sk89q/worldedit/cli/WorldChecker.java

@@ -0,0 +1,92 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.cli;
+
+import java.io.*;
+import java.nio.*;
+import java.util.regex.Pattern;
+
+import org.jnbt.NBTInputStream;
+import org.jnbt.Tag;
+
+public class WorldChecker {
+    private File worldPath;
+    
+    public WorldChecker(String path) {
+        worldPath = new File(path);
+
+        checkLevelDat();
+        checkFiles();
+
+        System.out.println("Done.");
+    }
+    
+    public void checkLevelDat() {
+        try {
+            checkNBT(new File(worldPath, "level.dat"));
+        } catch (IOException e) {
+            System.out.println("BAD: level.dat: " + e.getMessage());
+        }
+    }
+    
+    public void checkFiles() {
+        final Pattern chunkFilePattern = Pattern.compile("^c\\..*\\.dat$");
+        
+        FileFilter folderFilter = new FileFilter() {
+            @Override
+            public boolean accept(File f) {
+                return f.isDirectory();
+            }
+        };
+
+        FileFilter chunkFilter = new FileFilter() {
+            @Override
+            public boolean accept(File f) {
+                return f.isFile()
+                        && chunkFilePattern.matcher(f.getName()).matches();
+            }
+        };
+        
+        for (File l1 : worldPath.listFiles(folderFilter)) {
+            for (File l2 : l1.listFiles(folderFilter)) {
+                for (File chunkFile : l2.listFiles(chunkFilter)) {
+                    checkChunkFile(chunkFile,
+                            l1.getName(), l2.getName(), chunkFile.getName());
+                }
+            }
+        }
+    }
+    
+    public void checkChunkFile(File f, String a, String b, String c) {
+        String id = a + "/" + b + "/" + c;
+
+        try {
+            checkNBT(f);
+        } catch (IOException e) {
+            System.out.println("BAD: " + id);
+        }
+    }
+    
+    public void checkNBT(File file) throws IOException {
+        FileInputStream stream = new FileInputStream(file);
+        NBTInputStream nbt = new NBTInputStream(stream);
+        Tag tag = nbt.readTag();
+    }
+}