Recently I filed a bug against MooseX::Getopt while I was trying to get --help
working, but it was a bit incoherent:
https://rt.cpan.org/Ticket/Display.html?id=57683
I figured out how to get this to work by writing my own _getopt_full_usage
method (code below), but am now running into some more "interesting" behaviour
caused by the interaction of MooseX::Runnable with MooseX::Getopt and
MooseX::SimpleConfig. Hopefully this will make sense to someone.
Let's start with a simple working module...
package Module;
use strict;
use warnings;
use Moose;
use MooseX::ClassAttribute;
with 'MooseX::Getopt' => { excludes => [qw(_getopt_full_usage)] };
with 'MooseX::Runnable';
#with 'MooseX::SimpleConfig'; # intentionally commented out for now
has [qw(help usage)] => (
is => 'ro', isa => 'Bool',
documentation => 'Prints this usage documentation.',
);
class_has instructions => (
is => 'ro', isa => 'Str',
init_arg => undef, # don't allow in constructor
default => 'TODO: usage text'
);
# called when --help or --usage is used on command line
sub _getopt_full_usage {
my ($this, $usage) = @_;
print $this->instructions, "\n";
print $usage->text, "\n";
exit;
}
sub run
{
my $this = shift;
print "### in run, with extra args @_\n";
}
no Moose;
__PACKAGE__->meta->make_immutable;
1;
When run from the command-line in this form, the expected usage information is
printed:
$ mx-run -I. Module --help
TODO: usage text
usage: mx-run [long options...]
--help Prints this usage documentation.
--usage Prints this usage documentation.
Now, if I uncomment the usage of MooseX::SimpleConfig, I get an error from
deep within Getopt::Long (it seems to be attempting to parse some pod data,
but I can't figure out where it is trying to find it):
$ mx-run -I. Module --help
Can't open mx-run ... Module: No such file or directory at
/usr/lib/perl5/5.8.8/Getopt/Long.pm line 1427
TODO: usage text
usage: mx-run [long options...]
--configfile
--help Prints this usage documentation.
--usage Prints this usage documentation.
To add to the interesting behaviour, if I create a separate script to invoke
the module:
$ cat run.pl
#!/usr/bin/perl
use strict;
use warnings;
use lib '.';
use MooseX::Runnable::Run;
@ARGV = ('--help') unless @ARGV;
run_application 'Module', @ARGV;
# ./run.pl
<no output at all!>
Has anyone gotten all three of these MX modules to work together in harmony?
The examples I provided are fairly simple, but something surely must be missing.
--
"When I see an adult on a bicycle, I do not despair
for the future of the human race." - H. G. Wells
. . . . .
Karen Etheridge, ka...@etheridge.ca GCS C+++$ USL+++$ P+++$ w--- M++
http://etheridge.ca/ PS++ PE-- b++ DI++++ e++ h(-)
