Further juicy goodness.

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

@@ -1,5 +1,5 @@
 //
-// $Id: Application.java,v 1.4 2004/07/06 05:13:35 mdb Exp $
+// $Id: Application.java,v 1.5 2004/07/06 09:46:35 mdb Exp $
 
 package com.threerings.getdown.data;
 
@@ -256,7 +256,7 @@ public class Application
             args[idx++] = processArg((String)iter.next());
         }
 
-        Log.info("Running " + StringUtil.join(args, "\n"));
+        Log.info("Running " + StringUtil.join(args, "\n  "));
         return Runtime.getRuntime().exec(args, null);
     }
 
@@ -306,11 +306,25 @@ public class Application
                      "Attempting recovery...");
         }
 
-        // if we failed to load the digest, try to redownload the digest
+        // if we have no version, then we are running in unversioned mode
-        // file and give it another good college try; this time we allow
+        // so we need to download our digest.txt file on every invocation
-        // exceptions to propagate up to the caller as there is nothing
+        if (_version == -1) {
-        // else we can do to recover
+            // make a note of the old meta-digest, if this changes we need
-        if (_digest == null) {
+            // to revalidate all of our resources as one or more of them
+            // have also changed
+            String olddig = (_digest == null) ? "" : _digest.getMetaDigest();
+            downloadControlFile(Digest.DIGEST_FILE);
+            _digest = new Digest(_appdir);
+            if (!olddig.equals(_digest.getMetaDigest())) {
+                Log.info("Unversioned digest changed. Revalidating...");
+                clearValidationMarkers();
+            }
+
+        } else if (_digest == null) {
+            // if we failed to load the digest, try to redownload the
+            // digest file and give it another good college try; this time
+            // we allow exceptions to propagate up to the caller as there
+            // is nothing else we can do to recover
             downloadControlFile(Digest.DIGEST_FILE);
             _digest = new Digest(_appdir);
         }
@@ -391,6 +405,22 @@ public class Application
         }
     }
 
+    /** Clears all validation marker files. */
+    protected void clearValidationMarkers ()
+    {
+        clearValidationMarkers(_codes.iterator());
+        clearValidationMarkers(_resources.iterator());
+    }
+
+    /** Clears all validation marker files for the resources in the
+     * supplied iterator. */
+    protected void clearValidationMarkers (Iterator iter)
+    {
+        while (iter.hasNext()) {
+            ((Resource)iter.next()).clearMarker();
+        }
+    }
+
     /**
      * Downloads a new copy of the specified control file and, if the
      * download is successful, moves it over the old file on the

src/java/com/threerings/getdown/data/Digest.java

@@ -1,5 +1,5 @@
 //
-// $Id: Digest.java,v 1.2 2004/07/02 15:22:49 mdb Exp $
+// $Id: Digest.java,v 1.3 2004/07/06 09:46:35 mdb Exp $
 
 package com.threerings.getdown.data;
 
@@ -39,13 +39,12 @@ public class Digest
         throws IOException
     {
         // parse and validate our digest file contents
-        String metaDigest = "";
         StringBuffer data = new StringBuffer();
         List pairs = ConfigUtil.parsePairs(new File(appdir, DIGEST_FILE));
         for (Iterator iter = pairs.iterator(); iter.hasNext(); ) {
             String[] pair = (String[])iter.next();
             if (pair[0].equals(DIGEST_FILE)) {
-                metaDigest = pair[1];
+                _metaDigest = pair[1];
                 break;
             }
             _digests.put(pair[0], pair[1]);
@@ -56,21 +55,20 @@ public class Digest
         MessageDigest md = getMessageDigest();
         byte[] contents = data.toString().getBytes("UTF-8");
         String md5 = StringUtil.hexlate(md.digest(contents));
-        if (!md5.equals(metaDigest)) {
+        if (!md5.equals(_metaDigest)) {
             String err = MessageUtil.tcompose(
-                "m.invalid_digest_file", metaDigest, md5);
+                "m.invalid_digest_file", _metaDigest, md5);
             throw new IOException(err);
         }
     }
 
-//     /**
+    /**
-//      * Returns the stored digest value for the file with the supplied
+     * Returns the digest for the digest file.
-//      * path, or null if no digest exists for a file with that path.
+     */
-//      */
+    public String getMetaDigest ()
-//     public String getDigest (String path)
+    {
-//     {
+        return _metaDigest;
-//         return (String)_digests.get(path);
+    }
-//     }
 
     /**
      * Computes the MD5 hash of the specified resource and compares it
@@ -145,4 +143,5 @@ public class Digest
     }
 
     protected HashMap _digests = new HashMap();
+    protected String _metaDigest = "";
 }

src/java/com/threerings/getdown/data/Resource.java

@@ -1,5 +1,5 @@
 //
-// $Id: Resource.java,v 1.4 2004/07/06 05:13:36 mdb Exp $
+// $Id: Resource.java,v 1.5 2004/07/06 09:46:35 mdb Exp $
 
 package com.threerings.getdown.data;
 
@@ -78,6 +78,10 @@ public class Resource
      */
     public boolean isMarkedValid ()
     {
+        if (!_local.exists()) {
+            clearMarker();
+            return false;
+        }
         return _marker.exists();
     }