cvsserver: nested directory creation fixups for Eclipse clients

To create nested directories without (or before) sending file entries
is rather tricky. Most clients just work. Eclipse, however, expects
a very specific sequence of events. With this patch, cvsserver meets
those expectations.

Note: we may want to reuse prepdir() in req_update -- should move it
outside of req_co. Right now prepdir() is tied to how req_co() works.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git-cvsserver.perl

@@ -579,20 +579,73 @@ sub req_co
     print $state->{CVSROOT} . "/$module/\n";
     print "Clear-static-directory $checkout_path/\n";
     print $state->{CVSROOT} . "/$module/\n";
+    print "Clear-sticky $checkout_path/\n"; # yes, twice
+    print $state->{CVSROOT} . "/$module/\n";
+    print "Template $checkout_path/\n";
+    print $state->{CVSROOT} . "/$module/\n";
+    print "0\n";
 
     # instruct the client that we're checking out to $checkout_path
     print "E cvs checkout: Updating $checkout_path\n";
 
     my %seendirs = ();
     my $lastdir ='';
 
+    # recursive
+    sub prepdir {
+       my ($dir, $repodir, $remotedir, $seendirs) = @_;
+       my $parent = dirname($dir);
+       $dir       =~ s|/+$||;
+       $repodir   =~ s|/+$||;
+       $remotedir =~ s|/+$||;
+       $parent    =~ s|/+$||;
+       $log->debug("announcedir $dir, $repodir, $remotedir" );
+
+       if ($parent eq '.' || $parent eq './') {
+           $parent = '';
+       }
+       # recurse to announce unseen parents first
+       if (length($parent) && !exists($seendirs->{$parent})) {
+           prepdir($parent, $repodir, $remotedir, $seendirs);
+       }
+       # Announce that we are going to modify at the parent level
+       if ($parent) {
+           print "E cvs checkout: Updating $remotedir/$parent\n";
+       } else {
+           print "E cvs checkout: Updating $remotedir\n";
+       }
+       print "Clear-sticky $remotedir/$parent/\n";
+       print "$repodir/$parent/\n";
+
+       print "Clear-static-directory $remotedir/$dir/\n";
+       print "$repodir/$dir/\n";
+       print "Clear-sticky $remotedir/$parent/\n"; # yes, twice
+       print "$repodir/$parent/\n";
+       print "Template $remotedir/$dir/\n";
+       print "$repodir/$dir/\n";
+       print "0\n";
+
+       $seendirs->{$dir} = 1;
+    }
+
     foreach my $git ( @{$updater->gethead} )
     {
         # Don't want to check out deleted files
         next if ( $git->{filehash} eq "deleted" );
 
         ( $git->{name}, $git->{dir} ) = filenamesplit($git->{name});
 
+       if (length($git->{dir}) && $git->{dir} ne './'
+           && $git->{dir} ne $lastdir ) {
+           unless (exists($seendirs{$git->{dir}})) {
+               prepdir($git->{dir}, $state->{CVSROOT} . "/$module/",
+                       $checkout_path, \%seendirs);
+               $lastdir = $git->{dir};
+               $seendirs{$git->{dir}} = 1;
+           }
+           print "E cvs checkout: Updating /$checkout_path/$git->{dir}\n";
+       }
+
         # modification time of this file
         print "Mod-time $git->{modified}\n";
 
@@ -604,24 +657,10 @@ sub req_co
             print "M U $checkout_path/$git->{name}\n";
         }
 
-	if (length($git->{dir}) && $git->{dir} ne './'
-	    && $git->{dir} ne $lastdir && !exists($seendirs{$git->{dir}})) {
-
-	    # Eclipse seems to need the Clear-sticky command
-	    # to prepare the 'Entries' file for the new directory.
-	    print "Clear-sticky $checkout_path/$git->{dir}\n";
-	    print $state->{CVSROOT} . "/$module/$git->{dir}\n";
-	    print "Clear-static-directory $checkout_path/$git->{dir}\n";
-	    print $state->{CVSROOT} . "/$module/$git->{dir}\n";
-	    print "E cvs checkout: Updating /$checkout_path/$git->{dir}\n";
-	    $lastdir = $git->{dir};
-	    $seendirs{$git->{dir}} = 1;
-	}
-
-        # instruct client we're sending a file to put in this path
-        print "Created $checkout_path/" . ( defined ( $git->{dir} ) and $git->{dir} ne "./" ? $git->{dir} . "/" : "" ) . "\n";
+       # instruct client we're sending a file to put in this path
+       print "Created $checkout_path/" . ( defined ( $git->{dir} ) and $git->{dir} ne "./" ? $git->{dir} . "/" : "" ) . "\n";
 
-        print $state->{CVSROOT} . "/$module/" . ( defined ( $git->{dir} ) and $git->{dir} ne "./" ? $git->{dir} . "/" : "" ) . "$git->{name}\n";
+       print $state->{CVSROOT} . "/$module/" . ( defined ( $git->{dir} ) and $git->{dir} ne "./" ? $git->{dir} . "/" : "" ) . "$git->{name}\n";
 
         # this is an "entries" line
         print "/$git->{name}/1.$git->{revision}///\n";