Multiple package with exporter in Perl - perl

Question

I'm trying to get familiar with Perl exporter, the issue i am facing is whatever I try I cannot use exporter with modules containing multiple packages in it. What am I missing below?
MyModule.pm
use strict;
use warnings;
package Multipackage1;
use Exporter;
our #ISA = qw(Exporter);
our #EXPORT = qw(test1);
sub test1 {
print "First package\n";
}
1;
package Multipackage2;
use Exporter;
our #ISA = qw(Exporter);
our #EXPORT = qw(test2);
sub test2 {
print "Second package\n";
}
1;
package Multipackage3;
use Exporter;
our #ISA = qw(Exporter);
our #EXPORT_OK = qw(test3);
sub test3 {
print "Third package\n";
}
1;
MyMainFile.pl
#!/usr/bin/perl
use strict;
use warnings;
use Multipackage;
use Multipackage qw(test3);
print "Calling first package:\n";
test1();
print "Calling second package:\n";
test2();
print "Calling third package:\n";
test3();
I getting test1 is not part of the main package.
Thanks in advance.

Answer 1

The use calls require, which looks for a file with the package name (with / for :: and + .pm).
So require the actual file with packages instead and then import from packages.
main.pl
use warnings;
use strict;
require MyModule;
import Multipackage1;
import Multipackage2;
import Multipackage3 qw(test3);
print "Calling first package:\n";
test1();
print "Calling second package:\n";
test2();
print "Calling third package:\n";
test3();
In the MyModule.pm, place each package in its own block to provide scope for lexical variables, since package doesn't do that, or use package Pack { ... } since v5.14. There is no need for all those 1s, and you may pull use Exporter; out of the blocks.
Output
Calling first package:
First package
Calling second package:
Second package
Calling third package:
Third package
Better yet, replace our #ISA = qw(Exporter); with use Exporter qw(import); for
use strict;
use warnings;
package Multipackage1 {
use Exporter qw(import);
our #EXPORT = qw(test1);
sub test1 { print "First package\n" }
}
...
1;
with the same output.
Note that putting multiple packages in one file is normally not needed and not done.