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Re^2: multi version perl

by space_monk (Chaplain)
on Jun 06, 2013 at 09:50 UTC ( #1037426=note: print w/ replies, xml ) Need Help??


in reply to Re: multi version perl
in thread multi version perl

You should not redirect /usr/bin/perl for the reasons explained above, but you CAN reasonably redirect /usr/local/bin/perl to your new version of Perl and put that as the path to Perl in the magic perl start line.

You should also arrange the path search for non-admin users to pick up the local perl instead of the system Perl.

e.g. in /etc/profile or similar
export PATH=/usr/local/bin;$PATH

You may need to add/change other environment variables as well (PERL5INC, PERL5LIBS..)

If you spot any bugs in my solutions, it's because I've deliberately left them in as an exercise for the reader! :-)


Comment on Re^2: multi version perl
Re^3: multi version perl
by salva (Abbot) on Jun 06, 2013 at 11:48 UTC
    You should also arrange the path search for non-admin users to pick up the local perl instead of the system Perl

    Why?

    I can see that would make sense in certain environments, but I don't see it as a general rule.

      Presumably because other users will be using the scripts written for the local Perl version. (Though given it's Ubuntu I'm betting against there being other users ;)

      print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."

      Well IIRC /usr/local/bin will normally precede /usr/bin in the path search order for non-admin users anyway, so I'm not proposing anything radical here.

      You should be encouraging users to use the installed perl as a default, not the system perl which should be only there to support existing admin tasks

      If you spot any bugs in my solutions, it's because I've deliberately left them in as an exercise for the reader! :-)

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