Why not to use Carton?
carton exec hypnotoad script/my_app.pl
I recently startet to use a small wrapper script to setup the
environment (including cpan module installation with cpanfile and
cpanm) to allow our jenkins server to perform clean testing of the git
master.
Everything needed apart from already installed system perl is stuffed
in ./local and used with eval `perl -Mlocal::lib=local` to setup the
env and exec the actuall app (in our case prove for testing or
hypnotoad for production serving).
Works out very well, as also devs can now simply setup a new
environment in one shot.
Does not fit in every development or deployment process, but for us it
seems to work out for now.
BR
+rl
On Sat, Oct 18, 2014 at 9:12 AM, Jan Henning Thorsen
<[email protected] <mailto:[email protected]>> wrote:
perl -I is not inherited through exec(). You're better off using:
PERL5LIB=$PWD/perl5/lib/perl5 $PWD/perl5/bin/hypnotoad
This way, PERL5LIB is set for the current process and all the sub
processes started with exec(). Note the $PWD part, which will make
sure it's set to an absolute path.
On Saturday, October 18, 2014 6:01:15 AM UTC+2, perlpong wrote:
This is not a bug-report or a request for help, I am just
sharing my experience.
I install Mojolicious inside an app-local directory using
cpanm's "-L" switch:
.
|─- perl5/
| |-- bin/
| | |-- hypnotoad
| | |-- mojo
| | |-- morbo
| |-- lib/
| |-- perl5/
| |-- Mojo/
| |-- Mojo.pm
| |-- Mojolicious/
| |-- Mojolicious.pm
|-- script/
|-- app.pl <http://app.pl>
I run hypnotoad with Perl's "-I" flag to append my local-lib
directory to the beginning of @INC:
perl -Iperl5/lib/perl5 perl5/bin/hypnotoad
./script/myapp.pl <http://myapp.pl>
My app logs an error related to Mojolicious:
Can't locate object method "every_param" via package
"Mojo::Parameters"
After investigating I realise that my "global" install of
Mojolicious is being loaded instead of my local one.
If I dump @INC at the beginning of the hypnotoad script, it
produces this:
(
"/home/ac/apps/MyApp/perl5/bin/../lib",
"perl5/lib/perl5/i686-linux",
"perl5/lib/perl5",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/i686-linux",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/5.16.1/i686-linux",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/5.16.1",
".",
)
(
"/home/ac/apps/MyApp/perl5/bin/../lib",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1/i686-linux",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/site_perl/5.16.1",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/5.16.1/i686-linux",
"/home/ac/perl5/perlbrew/perls/perl-5.16.1/lib/5.16.1",
".",
)
It appears that the process restarts itself, the second time
without my modified @INC.
Looking inside Mojo::Server::Hypnotoad, I notice this:
$ENV{HYPNOTOAD_EXE} ||= $0;
...
# Clean start (to make sure everything works)
die "Can't exec: $!" if !$ENV{HYPNOTOAD_REV}++ && !exec
$ENV{HYPNOTOAD_EXE};
So my workaround is to manually set the HYPNOTOAD_EXE
environment variable:
export HYPNOTOAD_EXE="perl -Iperl5/lib/perl5
perl5/bin/hypnotoad"
perl -Iperl5/lib/perl5 perl5/bin/hypnotoad
./script/myapp.pl <http://myapp.pl>
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