Re: Modules 101 :: Using a Local Module from CPAN

Instead of requiring the file with full path, see lib:

use lib '/path/to/my/modules';
use Script::Singleton;
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If the module is located in a place relative to the script, you can use FindBin:

use FindBin;
use lib "$FindBin::Bin/lib";
use Script::Singleton;
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map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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Re^2: Modules 101 :: Using a Local Module from CPAN by redapplesonly (Sexton) on Dec 06, 2022 at 18:13 UTC
Thanks choroba, I'm afraid either solution doesn't work. When I change my script to: `use lib '/path/to/my/local/directory/'; use Script::Singleton; # Line 6` [download] ...the output is still: `Can't locate Script/Singleton.pm in @INC (you may need to install the +Script::Singleton module) (@INC contains: /home/demo/pullWorkload/scp +LRSIControllerDir/toys/ /etc/perl /usr/local/lib/x86_64-linux-gnu/per +l/5.30.0 /usr/local/share/perl/5.30.0 /usr/lib/x86_64-linux-gnu/perl5 +/5.30 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.30 /usr/share +/perl/5.30 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-ba +se) at ./testMe.perl line 6.` [download] I note that the `use lib` must specify the directory, not the .PM file, BTW. If the `use lib` doesn't add `/path/to/my/local/directory/` to @INC, I'm at a loss on what might be the problem. Any thoughts...? Thank you for writing.	[reply] [d/l] [select]
Re^3: Modules 101 :: Using a Local Module from CPAN by hv (Prior) on Dec 06, 2022 at 18:46 UTC
Perl always expects each `::` in a module name to translate to a path separator in the directory hierarchy. So for the module `Script::Singleton` it will look for the file `Singleton.pm` in a subdirectory named `Script` underneath one of the directories specified in `@INC`. So if you want to reference it from `/home/demo/pullWorkload/scpLRSIControllerDir/toys`, you need to create `/home/demo/pullWorkload/scpLRSIControllerDir/toys/Script` (with `mkdir`), and put the file `Singleton.pm` in that directory. I would recommend this as a temporary solution only. For CPAN modules it is almost always preferable to keep them in a separate place - see other people's suggestions for how to do that. The handling of `::` in module names is not trivial to find in the documentation. From `perldoc -f use` you will see that `use Script::Singleton;` is exactly equivalent to `BEGIN { require Script::Singleton; Script::Singleton->import(); }`. You then need to understand that since `Script::Singleton` is not in quotes, it is what perl calls a "bareword", and then find the part of `perldoc -f require` that describes this: `If EXPR is a bareword, "require" assumes a .pm extension a +nd replaces "::" with "/" in the filename for you, to make it + easy to load standard modules.` [download]	[reply] [d/l] [select]
Re^4: Modules 101 :: Using a Local Module from CPAN by redapplesonly (Sexton) on Dec 06, 2022 at 19:41 UTC
Thanks hv! Yes! Yes, this is the piece of information I was hoping for. Thanks so much for writing, you've explained it well enough for me to understand it, which is a pretty big accomplishment, actually. Thank you, may the universe shower you in positive kudos today :)	[reply]