I would do it like this:

#!/usr/bin/env perl                                                   
+                          

use strict;
use warnings;
use IO::All;

my $file = shift || die qq(No file specified!);
my @lines;
my $line = 1;

my @found = grep { $_->name =~ /.+\/$file$/i } io(q(.))->all;

die qq($file not found) unless @found;

@lines = map { $_ = $line++ . qq( $_) } io( $found[0] )->slurp;

print for @lines;

__END__
1 #!/usr/bin/env perl
2 
3 use strict;
4 use warnings;
5 use IO::All;
6 
7 my $file = shift || die qq(No file specified!);
8 my @lines;
9 my $line = 1;
10 
11 my @found = grep { $_->name =~ /.+\/$file$/i } io(q(.))->all;
12 
13 die qq($file not found) unless @found;
14 
15 @lines = map { $_ = $line++ . qq( $_) } io( $found[0] )->slurp;
16 
17 print for @lines;
18 
19 __END__
20 
21
[download]

Please see also IO::All, grep, map and TMTOWTDI.

Regards, Karl

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