fix logic error

This sometimes caused infinite recursion when rebuilding a wiki
with po files.

diff --git a/IkiWiki/Plugin/po.pm b/IkiWiki/Plugin/po.pm
index 5d0d9e79dd26074344a642f524d098101e4a21c8..d9aa9bfda40fa86bd463943a565cd0f1c5cd47b5 100644 (file)
--- a/IkiWiki/Plugin/po.pm
+++ b/IkiWiki/Plugin/po.pm
@@ -394,23 +394,25 @@ sub change (@) {
        my $updated_po_files=0;
 
        # Refresh/create POT and PO files as needed.
-       # (But avoid doing so if they are in an underlay directory.)
        foreach my $file (grep {istranslatablefile($_)} @rendered) {
                my $masterfile=srcfile($file);
                my $page=pagename($file);
                my $updated_pot_file=0;
+
+               # Avoid touching underlay files.
+               next if $masterfile ne "$config{srcdir}/$file";
+
                # Only refresh POT file if it does not exist, or if
-               # $pagesources{$page} was changed: don't if only the HTML was
+               # the source was changed: don't if only the HTML was
                # refreshed, e.g. because of a dependency.
-               if ($masterfile eq "$config{srcdir}/$file" &&
-                  ((grep { $_ eq $pagesources{$page} } @origneedsbuild)
-                   || ! -e potfile($masterfile))) {
+               if ((grep { $_ eq $pagesources{$page} } @origneedsbuild) ||
+                   ! -e potfile($masterfile)) {
                        refreshpot($masterfile);
                        $updated_pot_file=1;
                }
                my @pofiles;
                foreach my $po (pofiles($masterfile)) {
-                       next if ! $updated_pot_file && ! -e $po;
+                       next if ! $updated_pot_file && -e $po;
                        next if grep { $po=~/\Q$_\E/ } @{$config{underlaydirs}};
                        push @pofiles, $po;
                }