perlbrew switch perl-5.18.2 opening subshell
Apologies in advance if this is the wrong place to post. I am setting up a new machine with Linux/Ubuntu v13.10 -- the first time in nearly two years when I am using Linux as a desktop. I'm trying to make a clean start with respect to my Perl-related programming practices: * I want to use perlbrew as much as possible * I want to use cpanm rather than cpan as much as possible But I am having a hell of a time trying to get perlbrew to work in the way I am accustomed to it working on my $job MacBook Pro. I have (several times today) installed perlbrew with this command: cpan install App::perlbrew I now have: # which perlbrew /usr/local/bin/perlbrew # And I have added: 'source ~/perl5/perlbrew/etc/bashrc' to the end of my ~/.bash_profile file. (AAMOF, it's the only entry yet in that file.) And I have said: 'perlbrew init' The following commands work as expected: # perlbrew available perlbrew install perl-5.18.2 perlbrew list # However, whenever I say: ## perlbrew switch perl-5.18.2 ## I get: # A sub-shell is launched with perl-5.18.2 as the activated perl. Run 'exit' to finish it. bash-4.2$ # This is unexpected and undesired behavior. On the basis of using perlbrew on my work laptop for 1 year, I would *not* expect a sub-shell to be opened. I would expect that, from the moment of 'perlbrew switch' forward, I would: a) stay in the same shell b) have 'perl -v' point to the 5.18.2 underneath my homedir. On this new machine, when I am in the subshell, which perl -v gives 5.18.2. But when I exit, I'm back to the vendor perl. 'perldoc perlbrew' documents 'switch' as: Permanently use the specified per as default. That's the behavior I want. I don't want a subshell to be opened. I want perlbrew switch perl-5.18.2 to make 5.18.2 my default perl. Can anyone tell me what I'm doing wrong? Thank you very much. Jim Keenan
Re: perlbrew switch perl-5.18.2 opening subshell
On 23 March 2014 04:31, James E Keenan jk...@verizon.net wrote: And I have added: 'source ~/perl5/perlbrew/etc/bashrc' to the end of my ~/.bash_profile file. (AAMOF, it's the only entry yet in that file.) This might be the cause, I have that stanza in ~/.bashrc instead And this seems to make a difference. Because ~/.bashrc is sourced each time bash is spawned, but ~/.bash_profile is only sourced under *login* shells, which means you have to do `bash -l` to load perlbrew into ENV And this matters, because without the perlbrew bashrc magic, `perlbrew switch` is a command, while with the perlbrew bashrc magic, `perlbrew` is a shell function. type -t perlbrew function -- Kent
Re: perlbrew switch perl-5.18.2 opening subshell
On 3/22/14 10:31 AM, James E Keenan wrote: [snip] And I have added: 'source ~/perl5/perlbrew/etc/bashrc' to the end of my ~/.bash_profile file. (AAMOF, it's the only entry yet in that file.) Adding that 'source' line to my .bash_profile appeared to be ineffective. However, when I added it to the end of ~/.bashrc, then called 'source ~/.bashrc', 'perlbrew switch perl-5.18.2' DWIMmed. http://perlbrew.pl/Release-0.29.html appears to suggest that this is a recent modification to perlbrew's behavior. If anyone can confirm that this diagnosis/correction is optimal, that would be appreciated. Thank you very much. Jim Keenan
Re: perlbrew switch perl-5.18.2 opening subshell
On 3/22/14 1:04 PM, Kent Fredric wrote: On 23 March 2014 04:31, James E Keenanjk...@verizon.net wrote: And I have added: 'source ~/perl5/perlbrew/etc/bashrc' to the end of my ~/.bash_profile file. (AAMOF, it's the only entry yet in that file.) This might be the cause, I have that stanza in ~/.bashrc instead And this seems to make a difference. Thanks, Kent. I got your post just after I stumbled on the same thing and posted to the list. Thank you very much. Jim Keenan
Re: perlbrew switch perl-5.18.2 opening subshell
* James E Keenan jk...@verizon.net [2014-03-22 19:25]: http://perlbrew.pl/Release-0.29.html appears to suggest that this is a recent modification to perlbrew's behavior. Uhm, for rather relative values of “recent”: 0.29 is 2½ years old as of this writing, and was released when perlbrew was just 1½ years old. The current version is 0.67. -- Aristotle Pagaltzis // http://plasmasturm.org/
