I wrote diotalevi's grep. It's one distinguishing feature is automatically looking inside tarballs and zip files. I find that's really common for me. It does a dirt simple look at the file extension and opens .tgz/.zip/.whatever using the streaming abilities of archive extraction programs. The code isn't sexy and it isn't even good but it does do a pretty good enough job. It'd be possible to do a much better job given a few minutes and the interest. I'd use ack immediately if it got this feature.
sub open_file_harder {
my ($filename) = @_;
return if not defined $filename;
if ( my ($extension) = $filename =~ /(\.[^.]+)\z/mx ) {
my @readers = (
[ qr/\.t(?:ar\.)?gz\z/ => qw( gzcat ), $filename ],
[ qr/\.zip\z/, => qw( unzip -p ), $filename ],
[ qr/\.Z\z/ => qw( zcat ), $filename ],
[ qr/\.gz\z/ => qw( gzcat ), $filename ],
[ qr/\.bz2\z/ => qw( bzcat ), $filename ],
);
for my $reader (@readers) {
my ( $pattern, @command ) = @{$reader};
if ( $extension =~ $pattern ) {
open3( undef, my $fh, undef, @command );
return $fh;
}
}
}
open my $fh, '<', $filename
or die "Couldn't open $filename: $!";
return $fh;
}
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