in reply to Why is lib/perl5 not added to INC for perls installed using perlbrew

G'day areldy_exten,

Welcome to the Monastery.

I also have Perl 5.32.0 installed using Perlbrew. From the description of your setup, mine seems to be identical; of course, mine may differ from yours in areas that you haven't mentioned. 

$ perlbrew list
 * perl-5.32.0
   perl-5.30.0

$ which perl
/home/ken/perl5/perlbrew/perls/perl-5.32.0/bin/perl

$ echo $PERLBREW_ROOT
/home/ken/perl5/perlbrew

$ $PERLBREW_ROOT/perls/perl-5.32.0/bin/perl -V
Summary of my perl5 (revision 5 version 32 subversion 0) configuration
+:
...
  @INC:
    /home/ken/perl5/perlbrew/perls/perl-5.32.0/lib/site_perl/5.32.0/cy
+gwin-thread-multi
    /home/ken/perl5/perlbrew/perls/perl-5.32.0/lib/site_perl/5.32.0
    /home/ken/perl5/perlbrew/perls/perl-5.32.0/lib/5.32.0/cygwin-threa
+d-multi
    /home/ken/perl5/perlbrew/perls/perl-5.32.0/lib/5.32.0

$ ls -l $PERLBREW_ROOT/perls/perl-5.32.0/lib/perl5
ls: cannot access '/home/ken/perl5/perlbrew/perls/perl-5.32.0/lib/perl
+5': No such file or directory

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"Why isn't this included automatically in the @INC?"

Short answer: because it doesn't exist.

Longer answer. I've been using Perlbrew for a very long time, certainly more than a decade, and I don't recall $PERLBREW_ROOT/perls/<install-name>/lib/perl5 ever being a standard Perlbrew directory. This would be why such a path would not be automatically added to @INC.

I'm not a user of cpanm, I use cpan. As such, I'm not in any position to comment on your use of cpanm beyond suggesting that you check that you are using it correctly. I know cpanm is widely used: if you have questions about that, you can definitely get help about it here.

If you have modules installed in non-standard locations, consider using PERL5LIB (see "perlrun: ENVIRONMENT") or use the lib pragma. There are other ways of dealing with this but that's probably jumping the gun and heading off-topic for the current issue.

Minor in-joke for anyone who recalls "Re^4: [OT] 'perl' is not the 'perl' reported by 'which perl'": yes, I did remember type but thought which was more appropriate here. However, just for completeness: 

$ type perl
perl is /home/ken/perl5/perlbrew/perls/perl-5.32.0/bin/perl

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— Ken

Replies are listed 'Best First'.
Re^2: Why is lib/perl5 not added to INC for perls installed using perlbrew
by tobyink (Canon) on Sep 11, 2020 at 15:50 UTC

    "I've been using Perlbrew for a very long time, certainly more than a decade, and I don't recall $PERLBREW_ROOT/perls/<install-name>/lib/perl5 ever being a standard Perlbrew directory."

    None of my perlbrew installations have such a directory either. And I do use cpanm.

    toby döt ink
[reply]
      Thank you kcott and tobyinky for the replies.

      My purpose is to install a self-contained perl and a collection of modules all together.
      Such that I can have my scripts work seamlessly by just pointing the shebang to the perl bin.
      E.g.  $PERLBREW_ROOT/perls/perl-5.32.0/bin/perl in this case.

      As I mentioned in my post I installed the modules by doing 
      cd $PERLBREW_ROOT/perls/perl-5.32.0
cpanm -L . MODULE

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      The cpanm is localed at $PERLBREW_ROOT/bin/cpanm
      This has resulted in the following tree (truncated): 
      perls
\-- perl-5.32.0/
    |-- bin/
    |   |-- cpan*
    |   |-- perl*
    |   |-- perl5.32.0*
    |   \-- zipdetails*
    \-- lib/
        |-- 5.32.0/
        |   |-- AnyDBM_File.pm
        |   |-- App/
        |   |-- x86_64-linux-thread-multi-ld/
        |   \-- XSLoader.pm
        |-- perl5/
        |   |-- Alien/
        |   |-- alienfile.pm
        |   |-- x86_64-linux-thread-multi-ld/
        |   \-- XML/
        \-- site_perl/
            \-- 5.32.0/

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      As you can see it has created the perl5/ folder I mention.

      Could you please suggest the correct way to install modules in this perl lib such that the module files sit in the given lib/5.32.0 or lib/site_perl area?

      Thank you again!
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        You should be able to just run:

        cpanm Module

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        Don't use -L . — it already knows the right place to install it.

        toby döt ink
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        "Such that I can have my scripts work seamlessly by just pointing the shebang to the perl bin. E.g. $PERLBREW_ROOT/perls/perl-5.32.0/bin/perl in this case."

        I start all of my scripts with the following shebang. This includes those I write for myself, scripts I post here, and those I write for work in a production environment. 

        #!/usr/bin/env perl

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        That may work for you also. See perlrun for more details about this.

        — Ken

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