As pointed out you really don't want to do this, but here is how anyway* ;-) This only works if you use the module not if you require if as when you use a module the modules import() method is called at the start of proceedings. This is not true for require when import is not called.
package MyModule;
use strict;
use Exporter;
use vars qw($VERSION @ISA @EXPORT $MOD_CALL );
$VERSION = 1.00;
@ISA = qw(Exporter);
@EXPORT = qw( func1 );
sub func1 { return reverse @_ }
sub import { $MOD_CALL++; }
CHECK{ print $MOD_CALL ? "Called as a module\n" : "Called as a script\
+n" }
1;
On the rare occasions I have made a module a stand alone executable (usually for all the wrong laziness reasons) I have just used the presence of values in @ARGV to initiate script like behaviour. Generally you want to pass some data to a script anyway......
if ( @ARGV ) {
print "I'm a script!\n";
# do stuff
exit 0;
}
# only get to here if you we are a module
* Recall the story about getting enough rope to hang yourself?
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