Using precompiled modules, Assembling a project into one single file (pbc)

[Георгий Устинов]

For example, there is a basic script
and a module used by this script.

main.pl
--
#!/usr/bin/perl6
use v6;
need Hello;
my $h = Hello.new();
$h.hello('world');
$h.hello('sun');

Hello.pm
---
#!/usr/bin/perl6
use v6;

class Hello;

method hello ($a) {
say 'Hello, ' ~ $a ~ '!';
}

-

If you compile Hello.pm to Hello.pir and remove Hello.pm,
PIR module does not load. Why?
[Perl6 2011.04, parrot 3.3.0]

===SORRY!===
Unable to find module 'Hello' in the @*INC directories.
(@*INC contains:
  /home/carmen/.perl6/lib
  /opt/rakudo-star-2011.04/install/lib/parrot/3.3.0/languages/perl6/lib
  .)

Also, if you look at the (pir) code for any compiled script,
it becomes clear that it uses some library called perl6_ops.
Does this mean that the file can not be run on a machine
where you have installed parrot but have not installed perl6?

Also, I do not understand, is there a way to build a project
from a large number of classes and roles (that placed
in different files and folders) into a single executable
portable pbc-file.
This can be very useful for scripting in desktop applications.
I pinned my hopes on pbc_merge, but it seems compiled
modules do not work together.

Re: Using precompiled modules, Assembling a project into one single file (pbc)

[Moritz Lenz]

Am 17.06.2011 11:40, schrieb Георгий Устинов:

If you compile Hello.pm to Hello.pir and remove Hello.pm,
PIR module does not load. Why?


Because .pm files are the authoritative source of information (for 
example regarding version information, but also regarding actual program 
code), and .pir files are just caches for that.



Also, if you look at the (pir) code for any compiled script,
it becomes clear that it uses some library called perl6_ops.
Does this mean that the file can not be run on a machine
where you have installed parrot but have not installed perl6?


That is correct.
Just consider the case where your program calls the eval() function - it 
needs the full Perl 6 compiler available. So you need rakudo installed 
to run Perl 6 scripts.



Also, I do not understand, is there a way to build a project
from a large number of classes and roles (that placed
in different files and folders) into a single executable
portable pbc-file.


I don't think parrot supports merging of .so and .pbc files, which would 
be required for such a step. Essentially you'd have to create something 
like Par::Packer, which extracts various files from an archive and makes 
that available.



This can be very useful for scripting in desktop applications.
I pinned my hopes on pbc_merge, but it seems compiled
modules do not work together.


It would be useful, but I don't think it is as straight-forward as you 
hoped it would be.


Cheers,
Moritz