*** empty log message ***

pandatool/src/cvscopy/cvsCopy.cxx

@@ -118,18 +118,24 @@ import(const Filename &source, void *extra_data,
     _tree.choose_directory(basename, suggested_dir, _force, _interactive);
   nassertr(dir != (CVSSourceDirectory *)NULL, dir);
 
-  nout << "Copying " << basename << " to " << dir->get_path() << "\n";
-
-  Filename dest = dir->get_fullpath() + "/" + basename;
-
   _copied_files[source] = dir;
+  Filename dest = dir->get_fullpath() + "/" + basename;
 
   bool new_file = !dest.exists();
-  if (!copy_file(source, dest, dir, extra_data, new_file)) {
-    return (CVSSourceDirectory *)NULL;
-  }
-  if (new_file) {
-    create_file(dest);
+  if (!new_file && verify_file(source, dest, dir, extra_data)) {
+    // The file is unchanged.
+    nout << dir->get_path() + "/" + basename << " is unchanged.\n";
+
+  } else {
+    // The file has changed.
+    nout << "Copying " << basename << " to " << dir->get_path() << "\n";
+
+    if (!copy_file(source, dest, dir, extra_data, new_file)) {
+      return (CVSSourceDirectory *)NULL;
+    }
+    if (new_file) {
+      create_file(dest);
+    }
   }
 
   return dir;
@@ -200,6 +206,67 @@ post_command_line() {
   return true;
 }
 
+
+////////////////////////////////////////////////////////////////////
+//     Function: CVSCopy::verify_file
+//       Access: Protected, Virtual
+//  Description: Verifies that the file is identical and does not need
+//               to be recopied.  Returns true if the files are
+//               identical, false if they differ.
+////////////////////////////////////////////////////////////////////
+bool CVSCopy::
+verify_file(const Filename &, const Filename &,
+	    CVSSourceDirectory *, void *) {
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: CVSCopy::verify_binary_file
+//       Access: Protected
+//  Description: Verifies that the file is identical and does not need
+//               to be recopied.  Returns true if the files are
+//               identical, false if they differ.
+////////////////////////////////////////////////////////////////////
+bool CVSCopy::
+verify_binary_file(Filename source, Filename dest) {
+  source.set_binary();
+  dest.set_binary();
+
+  ifstream s, d;
+  if (!source.open_read(s)) {
+    return false;
+  }
+  if (!dest.open_read(d)) {
+    return false;
+  }
+
+  int cs, cd;
+  cs = s.get();
+  cd = d.get();
+  while (!s.eof() && !s.fail() && !d.eof() && !d.fail()) {
+    if (cs != cd) {
+      return false;
+    }
+    cs = s.get();
+    cd = d.get();
+  }
+
+  if (s.fail() || d.fail()) {
+    // If we had some read error, call the files different.
+    return false;
+  }
+
+  // If we haven't reached the end of one of the files yet, that file
+  // is longer than the other one, and the files are therefore
+  // different.
+  if (!s.eof() || !d.eof()) {
+    return false;
+  }
+
+  // Otherwise, the files are the same.
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: CVSCopy::copy_binary_file
 //       Access: Protected

pandatool/src/cvscopy/cvsCopy.h

@@ -32,10 +32,14 @@ protected:
   virtual bool handle_args(Args &args);
   virtual bool post_command_line();
 
+  virtual bool verify_file(const Filename &source, const Filename &dest,
+			   CVSSourceDirectory *dest_dir,
+			   void *extra_data);
   virtual bool copy_file(const Filename &source, const Filename &dest,
 			 CVSSourceDirectory *dest_dir,
 			 void *extra_data, bool new_file)=0;
 
+  bool verify_binary_file(Filename source, Filename dest);
   bool copy_binary_file(Filename source, Filename dest);
 
   bool create_file(const Filename &filename);

pandatool/src/cvscopy/cvsSourceTree.cxx

@@ -396,8 +396,8 @@ ask_existing(const string &filename, const CVSSourceTree::Directories &dirs,
 CVSSourceDirectory *CVSSourceTree::
 ask_new(const string &filename, CVSSourceDirectory *dir) {
   while (true) {
-    nout << filename << " will be created at "
-	 << dir->get_path() + "/" + filename << ".\n";
+    nout << filename << " will be created in "
+	 << dir->get_path() << ".\n";
     string result = prompt("Create this file (y/n)? ");
     nassertr(!result.empty(), (CVSSourceDirectory *)NULL);
     if (result.size() == 1) {

pandatool/src/egg-palettize/eggPalettize.cxx

@@ -143,6 +143,13 @@ EggPalettize() : EggMultiFilter(true) {
      "which is an integer power of 2.  They will be scaled down to "
      "achieve this.",
      &EggPalettize::dispatch_none, &_got_force_power_2);
+  add_option
+    ("nolock", "", 0, 
+     "Don't attempt to lock the .pi file before rewriting it.  Use "
+     "with extreme caution, as multiple processes running on the same "
+     ".pi file may overwrite each other.  Use this only if the lock "
+     "cannot be achieved for some reason.",
+     &EggPalettize::dispatch_none, &_dont_lock_pi);
   add_option
     ("k", "", 0, 
      "Kill lines from the attributes file that aren't used on any "
@@ -555,7 +562,7 @@ run() {
       af.set_default_group(group);
     }
 
-    if (!af.grab_lock()) {
+    if (!_dont_lock_pi && !af.grab_lock()) {
       // Failing to grab the write lock on the attribute file is a
       // fatal error.
       exit(1);

pandatool/src/egg-palettize/eggPalettize.h

@@ -66,6 +66,7 @@ public:
   bool _optimal_resize;
   bool _touch_eggs;
   bool _eggs_include_images;
+  bool _dont_lock_pi;
   bool _remove_unused_lines;
 
   bool _describe_input_file;

pandatool/src/fltprogs/fltCopy.cxx

@@ -68,7 +68,7 @@ run() {
 ////////////////////////////////////////////////////////////////////
 //     Function: FltCopy::copy_file
 //       Access: Protected, Virtual
-//  Description: Called by import() if the timestamps indicate that a
+//  Description: Called by import() if verify_file() indicates that a
 //               file needs to be copied.  This does the actual copy
 //               of a file from source to destination.  If new_file is
 //               true, then dest does not already exist.