[Mpls-pm] System-context referencing of in-house perl libraries

[Ken Williams]

On Feb 7, 2006, at 4:16 PM, Shane McCarron wrote:

> You can put your use lib statements in a BEGIN block... so you can do
> something like
>
> BEGIN {
>
>     if ($^O eq "MSWin32") {
>        use lib whatever...
>     } else {
>        use lib unixy things
>    }
>
> }

That won't work, actually, because 'use' is a compile-time directive 
and not sensitive to being inside an if().  Watch this:

% perl -le 'if ($x) { use lib "/foo" } else { use lib "/bar" }; print 
for @INC'
/bar
/foo
/sw/lib/perl5/5.8.1/darwin-thread-multi-2level
/sw/lib/perl5/5.8.1
/sw/lib/perl5
...

Personally I'd probably just put all the libs in for good measure, they 
don't really hurt anything:

use lib "/usr/local/bass/lib";
use lib "/usr/local/bass/alder/lib";
use lib 'c:\Program Files\bass\<libraries>';


But if you don't want to do that, you could use a solution like Josh's, 
or you could externalize it altogether and make the *caller* specify 
where the libs live, either through setting the PERL5LIB environment 
variable or using the -I switch or whatever.

  -Ken