Added /listchunks and /delchunks.

src/SMWorldEdit.java

@@ -92,6 +92,9 @@ public class SMWorldEdit extends Plugin {
             worldEdit.setSnapshotRepository(new SnapshotRepository(snapshotsDir));
         }
 
+        String shellSaveType = properties.getString("shell-save-type", "").trim();
+        worldEdit.setShellSaveType(shellSaveType.equals("") ? null : shellSaveType);
+
         for (Map.Entry<String,String> entry : worldEdit.getCommands().entrySet()) {
             etc.getInstance().addCommand(entry.getKey(), entry.getValue());
         }

src/WorldEdit.java

@@ -25,6 +25,7 @@ import com.sk89q.worldedit.data.*;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.snapshots.InvalidSnapshotException;
 import java.util.HashMap;
+import java.util.Set;
 import java.util.HashSet;
 import java.util.Arrays;
 import java.util.logging.Level;
@@ -77,6 +78,10 @@ public class WorldEdit {
      * Default block change limit. -1 for no limit.
      */
     private int defaultChangeLimit = -1;
+    /**
+     * Shell script save type.
+     */
+    private String shellSaveType;
     /**
      * Stores the snapshot repository. May be null;
      */
@@ -169,6 +174,8 @@ public class WorldEdit {
         commands.put("/thru", "Go through the wall that you are looking at");
         commands.put("/ceil", "<Clearance> - Get to the ceiling");
         commands.put("/chunkinfo", "Get the filename of the chunk that you are in");
+        commands.put("/listchunks", "Print a list of used chunks");
+        commands.put("/delchunks", "Generate a shell script to delete chunks");
         commands.put("/listsnapshots", "List the 5 newest snapshots");
         commands.put("//use", "[SnapshotID] - Use a particular snapshot");
         commands.put("//restore", "Restore a particular snapshot");
@@ -888,6 +895,92 @@ public class WorldEdit {
 
             return true;
 
+        // Dump a list of involved chunks
+        } else if (split[0].equalsIgnoreCase("/listchunks")) {
+            checkArgs(split, 0, 0, split[0]);
+
+            Set<Vector2D> chunks = session.getRegion().getChunks();
+
+            for (Vector2D chunk : chunks) {
+                player.print(NestedFileChunkStore.getFilename(chunk));
+            }
+
+            return true;
+
+        // Dump a list of involved chunks
+        } else if (split[0].equalsIgnoreCase("/delchunks")) {
+            checkArgs(split, 0, 0, split[0]);
+
+            Set<Vector2D> chunks = session.getRegion().getChunks();
+            FileOutputStream out = null;
+
+            if (shellSaveType == null) {
+                player.printError("shell-save-type has to be configured in worldedit.properties");
+            } else if (shellSaveType.equalsIgnoreCase("bat")) {
+                try {
+                    out = new FileOutputStream("worldedit-delchunks.bat");
+                    OutputStreamWriter writer = new OutputStreamWriter(out, "UTF-8");
+                    writer.write("@ECHO off\r\n");
+                    writer.write("ECHO This batch file was generated by WorldEdit.\r\n");
+                    writer.write("ECHO It contains a list of chunks that were in the selected region\r\n");
+                    writer.write("ECHO at the time that the /delchunks command was used. Run this file\r\n");
+                    writer.write("ECHO in order to delete the chunk files listed in this file.\r\n");
+                    writer.write("ECHO.\r\n");
+                    writer.write("PAUSE\r\n");
+
+                    for (Vector2D chunk : chunks) {
+                        String filename = NestedFileChunkStore.getFilename(chunk);
+                        writer.write("ECHO " + filename + "\r\n");
+                        writer.write("DEL \"world/" + filename + "\"\r\n");
+                    }
+
+                    writer.write("ECHO Complete.\r\n");
+                    writer.write("PAUSE\r\n");
+                    writer.close();
+                    player.print("worldedit-delchunks.bat written. Run it when no one is near the region.");
+                } catch (IOException e) {
+                    player.printError("Error occurred: " + e.getMessage());
+                } finally {
+                    if (out != null) {
+                        try { out.close(); } catch (IOException ie) {}
+                    }
+                }
+            } else if (shellSaveType.equalsIgnoreCase("bash")) {
+                try {
+                    out = new FileOutputStream("worldedit-delchunks.sh");
+                    OutputStreamWriter writer = new OutputStreamWriter(out, "UTF-8");
+                    writer.write("#!/bin/bash\n");
+                    writer.write("echo This shell file was generated by WorldEdit.\n");
+                    writer.write("echo It contains a list of chunks that were in the selected region\n");
+                    writer.write("echo at the time that the /delchunks command was used. Run this file\n");
+                    writer.write("echo in order to delete the chunk files listed in this file.\n");
+                    writer.write("echo\n");
+                    writer.write("read -p \"Press any key to continue...\"\n");
+
+                    for (Vector2D chunk : chunks) {
+                        String filename = NestedFileChunkStore.getFilename(chunk);
+                        writer.write("echo " + filename + "\n");
+                        writer.write("rm \"world/" + filename + "\"\n");
+                    }
+
+                    writer.write("echo Complete.\n");
+                    writer.write("read -p \"Press any key to continue...\"\n");
+                    writer.close();
+                    player.print("worldedit-delchunks.sh written. Run it when no one is near the region.");
+                    player.print("You will have to chmod it to be executable.");
+                } catch (IOException e) {
+                    player.printError("Error occurred: " + e.getMessage());
+                } finally {
+                    if (out != null) {
+                        try { out.close(); } catch (IOException ie) {}
+                    }
+                }
+            } else {
+                player.printError("Unknown shell script save type. 'bat' or 'bash' expected.");
+            }
+
+            return true;
+
         // List snapshots
         } else if (split[0].equalsIgnoreCase("/listsnapshots")) {
             checkArgs(split, 0, 0, split[0]);
@@ -1128,4 +1221,18 @@ public class WorldEdit {
     public void setSnapshotRepository(SnapshotRepository snapshotRepo) {
         this.snapshotRepo = snapshotRepo;
     }
+
+    /**
+     * @return the shellSaveType
+     */
+    public String getShellSaveType() {
+        return shellSaveType;
+    }
+
+    /**
+     * @param shellSaveType the shellSaveType to set
+     */
+    public void setShellSaveType(String shellSaveType) {
+        this.shellSaveType = shellSaveType;
+    }
 }

src/com/sk89q/worldedit/data/NestedFileChunkStore.java

@@ -19,9 +19,9 @@
 
 package com.sk89q.worldedit.data;
 
-import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.*;
 import java.io.*;
-import java.util.*;
+import java.util.Map;
 import org.jnbt.*;
 
 /**
@@ -32,6 +32,37 @@ import org.jnbt.*;
  * @author sk89q
  */
 public abstract class NestedFileChunkStore extends ChunkStore {
+    /**
+     * Get the filename of a chunk.
+     * 
+     * @param pos
+     * @param separator
+     * @return
+     */
+    public static String getFilename(Vector2D pos, String separator) {
+        int x = pos.getBlockX();
+        int z = pos.getBlockZ();
+        
+        String folder1 = Integer.toString(divisorMod(x, 64), 36);
+        String folder2 = Integer.toString(divisorMod(z, 64), 36);
+        String filename = "c." + Integer.toString(x, 36)
+                + "." + Integer.toString(z, 36) + ".dat";
+
+        return folder1 + separator + folder2 + separator + filename;
+    }
+
+    /**
+     * Get the filename of a chunk, using the system's default path
+     * separator.
+     * 
+     * @param pos
+     * @param separator
+     * @return
+     */
+    public static String getFilename(Vector2D pos) {
+        return getFilename(pos, File.separator);
+    }
+
     /**
      * Get the tag for a chunk.
      *

src/com/sk89q/worldedit/regions/CuboidRegion.java

@@ -20,7 +20,11 @@
 package com.sk89q.worldedit.regions;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.data.ChunkStore;
 import java.util.Iterator;
+import java.util.Set;
+import java.util.HashSet;
 
 /**
  *
@@ -261,6 +265,29 @@ public class CuboidRegion implements Region {
         this.pos2 = pos2;
     }
 
+    /**
+     * Get a list of chunks that this region is within.
+     * 
+     * @return
+     */
+    public Set<Vector2D> getChunks() {
+        Set<Vector2D> chunks = new HashSet<Vector2D>();
+
+        Vector min = getMinimumPoint();
+        Vector max = getMaximumPoint();
+
+        for (int x = min.getBlockX(); x <= max.getBlockX(); x++) {
+            for (int y = min.getBlockY(); y <= max.getBlockY(); y++) {
+                for (int z = min.getBlockZ(); z <= max.getBlockZ(); z++) {
+                    Vector pt = new Vector(x, y, z);
+                    chunks.add(ChunkStore.toChunk(pt));
+                }
+            }
+        }
+
+        return chunks;
+    }
+
     /**
      * Get the iterator.
      * 

src/com/sk89q/worldedit/regions/Region.java

@@ -20,6 +20,8 @@
 package com.sk89q.worldedit.regions;
 
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
+import java.util.Set;
 
 /**
  *
@@ -74,4 +76,10 @@ public interface Region extends Iterable<Vector> {
      * @param change
      */
     public void contract(Vector change);
+    /**
+     * Get a list of chunks.
+     * 
+     * @return
+     */
+    public Set<Vector2D> getChunks();
 }