From: Jonathan Rockway <jon@jrock.us>
Date: Tue, 12 May 2009 02:23:18 +0000 (-0500)
Subject: implement the auto-restarter
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMooseX-Runnable.git;a=commitdiff_plain;h=3fe769271fadfe64aa148bf845c81e5b850e6a31

implement the auto-restarter
---

diff --git a/lib/MooseX/Runnable/Invocation/Plugin/Restart/Auto.pm b/lib/MooseX/Runnable/Invocation/Plugin/Restart/Auto.pm
new file mode 100644
index 0000000..a10c5b9
--- /dev/null
+++ b/lib/MooseX/Runnable/Invocation/Plugin/Restart/Auto.pm
@@ -0,0 +1,92 @@
+package MooseX::Runnable::Invocation::Plugin::Restart::Auto;
+use Moose::Role;
+use MooseX::Types;
+use MooseX::Types::Moose qw(ArrayRef RegexpRef Any Str);
+use MooseX::Types::Path::Class qw(Dir);
+use File::ChangeNotify;
+
+# coerce ArrayRef[Dir], from ArrayRef[Any], via {[
+#     map { warn $_; Path::Class::dir($_) } @$_,
+# ]};
+
+coerce RegexpRef, from Str, via { qr/$_/i };
+
+use namespace::autoclean;
+
+with 'MooseX::Runnable::Invocation::Plugin::Restart::Base';
+
+has 'watch_regexp' => (
+    is       => 'ro',
+    isa      => RegexpRef,
+    required => 1,
+    coerce   => 1,
+    default  => sub { qr/^[^.].+[.]pmc?$/i },
+);
+
+has 'watch_directories' => (
+    is       => 'ro',
+    isa      => ArrayRef[Dir],
+    required => 1,
+    coerce   => 1,
+    default  => sub { [Path::Class::dir('.')] },
+);
+
+has 'watcher' => (
+    is         => 'ro',
+    isa        => 'File::ChangeNotify::Watcher',
+    lazy_build => 1,
+);
+
+sub _build_initargs_from_cmdline {
+    my ($self, @args) = @_;
+
+    my $regexp;
+    my @dirs;
+    my $next_type;
+    for my $arg (@args){
+        # if($arg eq '--inc'){
+        #     push @dirs, @INC;
+        # }
+        if($arg eq '--dir'){
+            $next_type = 'dir';
+        }
+        elsif($arg eq '--regexp' || $arg eq '--regex'){
+            # i call them regexps, other people call them "regexen" :P
+            $next_type = 'regexp';
+        }
+        elsif($next_type eq 'dir'){
+            push @dirs, $arg;
+        }
+        elsif($next_type eq 'regexp'){
+            $regexp = $arg;
+        }
+        else {
+            confess 'Invalid args passed to Restart::Auto';
+        }
+    }
+    my %result;
+    $result{watch_directories} = [map { Path::Class::dir($_) } @dirs] if @dirs;
+    $result{watch_regexp} = $regexp if $regexp;
+    return \%result;
+}
+
+sub _build_watcher {
+    my $self = shift;
+    my $w = File::ChangeNotify->instantiate_watcher(
+        directories => [map { $_->stringify } @{$self->watch_directories}],
+        filter      => $self->watch_regexp,
+    );
+
+    return $w;
+}
+
+sub run_parent_loop {
+    my $self = shift;
+    while(1){
+        my @events = $self->watcher->wait_for_events();
+        $self->restart;
+        sleep .5; # "debounce" the notifier
+    }
+}
+
+1;