doc/bugs/Hyperestraier_search_plug-in_defective.mdwn



The map() function used in the hyperestraier search plug-in doesn't work as intended as ilustrated by this simple script:
#!/usr/bin/perl -w
use strict;

my @foo = (
	[ qw/foo bar baz/ ],
	[ qw/fee faa fum/ ],
	);

# similar to current ikiwiki code (defective):
my @bar = map { "/path/to/$_" foreach @{$_} } @foo;

# this works:
#my @bar = map { map { "/path/to/$_" } @{$_} } @foo;

foreach (@bar) {
	print "$_\n";
}

Expected output:
/path/to/foo
/path/to/bar
/path/to/baz
/path/to/fee
/path/to/faa
/path/to/fum

Current output:
Useless use of string in void context at perl-map.pl line 10.

The patch below fixes this issue:
--- IkiWiki/Plugin/search.pm.orig       Thu Feb  1 23:52:03 2007
+++ IkiWiki/Plugin/search.pm    Thu Feb  1 23:52:41 2007
@@ -64,8 +64,9 @@
        debug(gettext("updating hyperestraier search index"));
        estcmd("gather -cm -bc -cl -sd",
                map {
-                       Encode::encode_utf8($config{destdir}."/".$_)
-                               foreach @{$renderedfiles{pagename($_)}};
+                       map {
+                               Encode::encode_utf8($config{destdir}."/".$_)
+                       } @{$renderedfiles{pagename($_)}};
                } @_
        );
        estcfg();