Re: where to look for modules?

[drieux]

On Dec 20, 2003, at 2:33 AM, christopher j bottaro wrote:

on my system, perl looks for modules in /usr/lib/perl5/5.8.0/.  how 
can i
specify an additional path to look for modules in?  say for
instance, /home/cjb/perlmodules/ in addition to the aforementioned 
path.
first off, if I may recommend it, you might
want to be a bit more 'old school' about this.
My personal OCD is to lay things out

        $HOME/bin # where my apps go
        $HOME/lib # where lib things go
                        perl5/ # the perl stuff
                        java/  # jave stuff...
                        <stuff>/ # where the stuff stuff goes
        $HOME/include # where headers are installed
        $HOME/etc     # where config foo goes
        $HOME/proj        # where we do projects
What this will allow you do to is install in your
home directories the whole mess of marvels - including
those 'lib_foo.[so|dll|a|dynlib|<buzzPhraseHere>' which
will be required to build certain perl modules.
But the big win in this game is that once you like
your code well enough to share it with friends, then
you can advertise it, because it will be using
        #!/usr/bin/perl
        use strict;
        use warnings;
        use FindBin qw($RealBin);
        use lib "$RealBin/../lib/perl5";
        # use lib "$ENV{HOME}/lib/perl5";
        # now the module call out list is here
        use myCool::New::Module;
        # rest of the code here...
hence whether they opt to pre-pend your personal
bin directory, or put in a symbolic link into their
personal bin directory pointing at your code, the
perl code will do the right thing.
What you might want is to use the

	PERL5LIB

environmental variable - may I recommend that
you have an alternative profile that you source
when doing that type of development, so that
when you want to see that it is all self contained
in the perl script you run the code without the
environmental variable.
But personally I would bug the system administrator
with why having the Foo::Bar module is just something
that they can not live without - hence get them to
install it in the classical CPAN style way into
the site_perl or vendor_perl space.
{ trust me, I have that argument with myself regularly. }

ciao
drieux
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