The check_unpacked setting will now to version checks so that unpacking can occur if an update is

done by an external source outside of getdown.

src/main/java/com/threerings/getdown/data/Application.java

@@ -84,6 +84,7 @@ import com.threerings.getdown.util.FileUtil;
 import com.threerings.getdown.util.LaunchUtil;
 import com.threerings.getdown.util.MetaProgressObserver;
 import com.threerings.getdown.util.ProgressObserver;
+import com.threerings.getdown.util.VersionUtil;
 
 import static com.threerings.getdown.Log.log;
 
@@ -1131,19 +1132,9 @@ public class Application
         // and/or check the latest config URL for a newer version
         if (_version != -1) {
             File vfile = getLocalPath(VERSION_FILE);
-            FileInputStream fin = null;
-            long fileVersion = -1;
-            try {
-                fin = new FileInputStream(vfile);
-                BufferedReader bin = new BufferedReader(new InputStreamReader(fin));
-                String vstr = bin.readLine();
-                if (!StringUtil.isBlank(vstr)) {
-                    _targetVersion = fileVersion = Long.parseLong(vstr);
-                }
-            } catch (Exception e) {
-                log.info("Unable to read version file: " + e.getMessage());
-            } finally {
-                StreamUtil.close(fin);
+            long fileVersion = VersionUtil.readVersion(vfile);
+            if (fileVersion != -1) {
+                _targetVersion = fileVersion;
             }
 
             if (_latest != null) {
@@ -1285,6 +1276,15 @@ public class Application
         clearValidationMarkers(getAllResources().iterator());
     }
 
+    /**
+     * Returns the version number for the application.  Should only be called after successful
+     * return of verifyMetadata.
+     */
+    public long getVersion ()
+    {
+        return _version;
+    }
+
     /**
      * Creates a versioned application base URL for the specified version.
      */

src/main/java/com/threerings/getdown/launcher/Getdown.java

@@ -88,6 +88,7 @@ import com.threerings.getdown.util.ConfigUtil;
 import com.threerings.getdown.util.LaunchUtil;
 import com.threerings.getdown.util.MetaProgressObserver;
 import com.threerings.getdown.util.ProgressObserver;
+import com.threerings.getdown.util.VersionUtil;
 
 import static com.threerings.getdown.Log.log;
 
@@ -462,12 +463,25 @@ public abstract class Getdown extends Thread
                     // not have unpacked all of our resources yet
                     if (Boolean.getBoolean("check_unpacked")) {
                         File ufile = _app.getLocalPath("unpacked.dat");
+                        long version = -1;
+                        long aversion = _app.getVersion();
                         if (!ufile.exists()) {
-                            log.info("Performing initial unpack.");
+                            ufile.createNewFile();
+                        } else {
+                            version = VersionUtil.readVersion(ufile);
+                        }
+
+                        if (version < aversion) {
+                            log.info("Performing unpack.",
+                                    "version", version, "aversion", aversion);
                             setStep(Step.UNPACK);
                             updateStatus("m.validating");
                             _app.unpackResources(_progobs, unpacked);
-                            ufile.createNewFile();
+                            try {
+                                VersionUtil.writeVersion(ufile, aversion);
+                            } catch (IOException ioe) {
+                                log.warning("Failed to update unpacked version", ioe);
+                            }
                         }
                     }
 

src/main/java/com/threerings/getdown/util/VersionUtil.java

@@ -0,0 +1,85 @@
+//
+// $Id$
+//
+// Getdown - application installer, patcher and launcher
+// Copyright (C) 2004-2010 Three Rings Design, Inc.
+// http://code.google.com/p/getdown/
+//
+// Redistribution and use in source and binary forms, with or without modification, are permitted
+// provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list of
+//    conditions and the following disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package com.threerings.getdown.util;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.io.Reader;
+
+import com.samskivert.io.StreamUtil;
+import com.samskivert.util.StringUtil;
+
+import static com.threerings.getdown.Log.log;
+
+/**
+ * Version related utilities.
+ */
+public class VersionUtil
+{
+    /**
+     * Reads a version number from a file.
+     */
+    public static long readVersion (File vfile)
+    {
+        FileInputStream fin = null;
+        long fileVersion = -1;
+        try {
+            fin = new FileInputStream(vfile);
+            BufferedReader bin = new BufferedReader(new InputStreamReader(fin));
+            String vstr = bin.readLine();
+            if (!StringUtil.isBlank(vstr)) {
+                fileVersion = Long.parseLong(vstr);
+            }
+        } catch (Exception e) {
+            log.info("Unable to read version file: " + e.getMessage());
+        } finally {
+            StreamUtil.close(fin);
+        }
+
+        return fileVersion;
+    }
+
+    /**
+     * Writes a version number to a file.
+     */
+    public static void writeVersion (File vfile, long version)
+        throws IOException
+    {
+        PrintStream out = new PrintStream(new FileOutputStream(vfile));
+        try {
+            out.println(version);
+        } catch (Exception e) {
+            log.warning("Unable to write version file: " + e.getMessage());
+        } finally {
+            StreamUtil.close(out);
+        }
+    }
+}