fileset: array search

[perl/file-rewrite.git] / lib / File / Rewrite.pm

diff --git a/lib/File/Rewrite.pm b/lib/File/Rewrite.pm
index bb41513654d7de4fd731fdccdfcb825628df5329..2b05ded11175fc09025378089fa0fb67e8f64d6e 100644 (file)
--- a/lib/File/Rewrite.pm
+++ b/lib/File/Rewrite.pm
@@ -10,20 +10,46 @@ our @EXPORT_OK = qw(fileset);
 
 sub fileset {
        my ($filename, $replace, $search) = @_;
-       die if defined $replace;
        my $tmpname = "$filename.$$.tmp";
        my $changes = 0;
 
+       $search = $replace if not defined $search;
+
+       # generate a single regex to emulate smart match
+       $search = [$search] unless ref $search eq 'ARRAY';
+       $search = join('|', map { ref $_ ? $_ : "^\Q$_\E\$" } @$search);
+
        open my $src,  '<', $filename;
        open my $dest, '>', $tmpname;
        while (readline $src) {
-               if ($_ =~ (ref $search ? $search : qr/^\Q$search\E$/)) {
+               chomp;
+               if ($_ =~ /$search/s) {
+                       if (ref $replace eq 'ARRAY') {
+                               if (@$replace and $_ eq $replace->[0]) {
+                                       shift @$replace;
+                               }
+                               else {
+                                       $changes++;
+                                       next;
+                               }
+                       }
+                       elsif (defined $replace and $_ eq $replace) {
+                               undef $replace;
+                       }
+                       else {
                                $changes++;
                                next;
+                       }
                }
                print {$dest} $_, $/;
        }
        close $src;
+       if (defined $replace) {
+               for (ref $replace eq 'ARRAY' ? @$replace : $replace) {
+                       $changes++;
+                       print {$dest} $_, $/;
+               }
+       }
        close $dest;
 
        if ($changes) {