package Object::Remote::ModuleLoader;
BEGIN {
package Object::Remote::ModuleLoader::Hook;
use Moo;
use Object::Remote::Logging qw( :log :dlog );
has sender => (is => 'ro', required => 1);
# unqualified INC forced into package main
sub Object::Remote::ModuleLoader::Hook::INC {
my ($self, $module) = @_;
log_debug { "Loading $module via " . ref($self) };
my $ret = eval {
if (my $code = $self->sender->source_for($module)) {
open my $fh, '<', \$code;
Dlog_trace { "Module sender successfully sent code for '$module': $code" } $code;
return $fh;
}
log_trace { "Module sender did not return code for '$module'" };
return;
};
if ($@) {
log_trace { "Module sender blew up - $@" };
if ($@ =~ /Can't locate/) {
# Fudge the error messge to make it work with
# Module::Runtime use_package_optimistically
# Module::Runtime wants - /\ACan't locate \Q$fn\E .+ at \Q@{[__FILE__]}\E line/
# We could probably measure and hard-code this but that could easily
# be a forwards compatibility disaster, so do a quick search of caller
# with a reasonable range; we're already into a woefully inefficient
# situation here so a little defensiveness won't make things much worse
foreach my $i (4..20) {
my ($package, $file, $line) = caller($i);
last unless $package;
if ($package eq 'Module::Runtime') {
# we want to fill in the error message with the
# module runtime module call info.
$@ =~ s/(in \@INC.)/$1 at $file line $line/;
last;
}
}
}
die $@;
}
return $ret;
}
}
use Moo;
use Object::Remote::Logging qw( :log );
has module_sender => (is => 'ro', required => 1);
has inc_hook => (is => 'lazy');
sub _build_inc_hook {
my ($self) = @_;
log_debug { "Constructing module builder hook" };
my $hook = Object::Remote::ModuleLoader::Hook->new(sender => $self->module_sender);
log_trace { "Done constructing module builder hook" };
return $hook;
}
sub BUILD { shift->enable }
sub enable {
log_debug { "enabling module loader hook" };
push @INC, shift->inc_hook;
return;
}
sub disable {
my ($self) = @_;
log_debug { "disabling module loader hook" };
my $hook = $self->inc_hook;
@INC = grep $_ ne $hook, @INC;
return;
}
sub DEMOLISH { $_[0]->disable unless $_[1] }
1;