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|
package Class::Refresh;
use strict;
use warnings;
use Class::Unload;
use Class::Load;
our %CACHE;
sub refresh {
my $class = shift;
$class->refresh_module($_) for $class->modified_modules;
}
sub modified_modules {
my $class = shift;
my @ret;
for my $file (keys %INC) {
if (exists $CACHE{$file}) {
push @ret, $file
if $class->_mtime($file) ne $CACHE{$file};
}
else {
$class->_update_cache_for($file);
}
}
return @ret;
}
sub refresh_module {
my $class = shift;
my ($mod) = @_;
$mod = $class->_file_to_mod($mod);
my @to_refresh = $class->_dependent_modules($mod);
$class->unload_module($_) for @to_refresh;
$class->load_module($_) for @to_refresh;
}
sub unload_module {
my $class = shift;
my ($mod) = @_;
$mod = $class->_file_to_mod($mod);
Class::Unload->unload($mod);
if (Class::Load::is_class_loaded('Class::MOP')) {
Class::MOP::remove_metaclass_by_name($mod);
}
$class->_clear_cache_for($mod);
}
sub load_module {
my $class = shift;
my ($mod) = @_;
$mod = $class->_file_to_mod($mod);
Class::Load::load_class($mod);
$class->_update_cache_for($mod);
}
sub _dependent_modules {
my $class = shift;
my ($mod) = @_;
$mod = $class->_file_to_mod($mod);
return ($mod) unless Class::Load::is_class_loaded('Class::MOP');
my $meta = Class::MOP::class_of($mod);
return ($mod) unless $meta;
if ($meta->isa('Class::MOP::Class')) {
# attribute cloning (has '+foo') means that we can't skip refreshing
# mutable classes
return (
# NOTE: this order is important!
$mod,
map { $class->_dependent_modules($_) }
($meta->subclasses,
# XXX: metacircularity? what if $class is Class::MOP::Class?
($mod->isa('Class::MOP::Class')
? (map { $_->name }
grep { $_->isa($class) }
Class::MOP::get_all_metaclass_instances())
: ())),
);
}
elsif ($meta->isa('Moose::Meta::Role')) {
return (
$mod,
map { $class->_dependent_modules($_) } $meta->consumers,
);
}
else {
die "Unknown metaclass: $meta";
}
}
sub _update_cache_for {
my $class = shift;
my ($file) = @_;
$file = $class->_mod_to_file($file);
$CACHE{$file} = $class->_mtime($file);
}
sub _clear_cache_for {
my $class = shift;
my ($file) = @_;
$file = $class->_mod_to_file($file);
delete $CACHE{$file};
}
sub _mtime {
my $class = shift;
my ($file) = @_;
$file = $class->_mod_to_file($file);
return join ' ', (stat($INC{$file}))[1, 7, 9];
}
sub _file_to_mod {
my $class = shift;
my ($file) = @_;
return $file unless $file =~ /\.pm$/;
my $mod = $file;
$mod =~ s{\.pm$}{};
$mod =~ s{/}{::}g;
return $mod;
}
sub _mod_to_file {
my $class = shift;
my ($mod) = @_;
return $mod if $mod =~ /\.p[lm]$/;
my $file = $mod;
$file =~ s{::}{/}g;
$file .= '.pm';
return $file;
}
1;
|
