How to set up separate Perl modules for non-login users?

Question

Inspired of How can I use CPAN as a non-root user? i'd like to know, how to set up cpanm for non-login users (like www)? There is no login, so i don't know how to include some dir to @INC.

Edit: How i could set permanently enviroment var like PERL5LIB for non-login user? I can't set it from .bashrc (needs login) and not from /etc/environment (sets to everyone).

Answer 1

Methods of changing @INC:

On a per-script basis:

• use lib ...;
• -Mlib=... on the shebang line.

On a per-process basis:

• Set the PERL5LIB env var from the parent process.
  • sh: export PERL5LIB=... ; perl ...
  • sh: PERL5LIB=... perl ...
  • apache: SetEnv PERL5LIB ...

On a per-perl basis:

• Specifying the directories for @INC when configuring perl when building it.
• use lib ...; in a script named sitecustomize.pl in the directory returned by perl -V:sitelib.^[1]

Of course, you could also install your own local Perl, perhaps using perlbrew.

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Notes:

1. Perl only looks for sitecustomize.pl if The perl has been configured to do with -Dusesitecustomize. Check with perl -V:usesitecustomize to see if it was.