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1 | package MooseX::Runnable::Invocation; |
2 | use Moose; |
3 | use MooseX::Types -declare => ['RunnableClass']; |
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4 | use MooseX::Types::Moose qw(Str HashRef ArrayRef); |
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5 | use namespace::autoclean; |
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6 | |
7 | require Class::MOP; |
8 | |
9 | # we can't load the class until plugins are loaded, |
10 | # so we have to handle this outside of coerce |
11 | |
12 | subtype RunnableClass, |
13 | as Str, |
14 | where { $_ =~ /^[:A-Za-z_]+$/ }; |
15 | |
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16 | |
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17 | with 'MooseX::Runnable'; # this class technically follows |
18 | # MX::Runnable's protocol |
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19 | |
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20 | has 'class' => ( |
21 | is => 'ro', |
22 | isa => RunnableClass, |
23 | required => 1, |
24 | ); |
25 | |
26 | has 'plugins' => ( |
27 | is => 'ro', |
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28 | isa => HashRef[ArrayRef[Str]], |
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29 | default => sub { +{} }, |
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30 | required => 1, |
31 | auto_deref => 1, |
32 | ); |
33 | |
34 | sub BUILD { |
35 | my $self = shift; |
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36 | |
37 | # it would be nice to use MX::Object::Pluggable, but our plugins |
38 | # are too configurable |
39 | |
40 | my $plugin_ns = 'MooseX::Runnable::Invocation::Plugin::'; |
41 | for my $plugin (keys %{$self->plugins}){ |
42 | my $orig = $plugin; |
43 | $plugin = "$plugin_ns$plugin" unless $plugin =~ /^[+]/; |
44 | $plugin =~ s/^[+]//g; |
45 | |
46 | Class::MOP::load_class( $plugin ); |
47 | |
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48 | my $args; |
49 | if($plugin->meta->does_role('MooseX::Runnable::Invocation::Plugin::Role::CmdlineArgs')){ |
50 | $args = eval { |
51 | $plugin->_build_initargs_from_cmdline( |
52 | @{$self->plugins->{$orig}}, |
53 | ); |
54 | }; |
55 | |
56 | if($@) { |
57 | confess "Error building initargs for $plugin: $@"; |
58 | } |
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59 | } |
60 | |
61 | $plugin->meta->apply( |
62 | $self, |
63 | defined $args ? (rebless_params => $args) : (), |
64 | ); |
65 | } |
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66 | } |
67 | |
68 | sub load_class { |
69 | my $self = shift; |
70 | my $class = $self->class; |
71 | |
72 | Class::MOP::load_class( $class ); |
73 | |
74 | confess 'We can only work with Moose classes with "meta" methods' |
75 | if !$class->can('meta'); |
76 | |
77 | my $meta = $class->meta; |
78 | |
79 | confess "The metaclass of $class is not a Moose::Meta::Class, it's $meta" |
80 | unless $meta->isa('Moose::Meta::Class'); |
81 | |
82 | confess 'MooseX::Runnable can only run classes tagged with '. |
83 | 'the MooseX::Runnable role' |
84 | unless $meta->does_role('MooseX::Runnable'); |
85 | |
86 | return $meta; |
87 | } |
88 | |
89 | sub apply_scheme { |
90 | my ($self, $class) = @_; |
91 | |
92 | my @schemes = grep { defined } map { |
93 | $self->_convert_role_to_scheme($_) |
94 | } $class->calculate_all_roles; |
95 | |
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96 | eval { |
97 | foreach my $scheme (@schemes) { |
98 | $scheme->apply($self); |
99 | } |
100 | }; |
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101 | } |
102 | |
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103 | |
104 | sub _convert_role_to_scheme { |
105 | my ($self, $role) = @_; |
106 | |
107 | my $name = $role->name; |
108 | return if $name =~ /\|/; |
109 | $name = "MooseX::Runnable::Invocation::Scheme::$name"; |
110 | |
111 | return eval { |
112 | Class::MOP::load_class($name); |
113 | warn "$name was loaded OK, but it's not a role!" and return |
114 | unless $name->meta->isa('Moose::Meta::Role'); |
115 | return $name->meta; |
116 | }; |
117 | } |
118 | |
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119 | sub validate_class { |
120 | my ($self, $class) = @_; |
121 | |
122 | my @bad_attributes = map { $_->name } grep { |
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123 | $_->is_required && !($_->has_default || $_->has_builder) |
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124 | } $class->get_all_attributes; |
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125 | |
126 | confess |
127 | 'By default, MooseX::Runnable calls the constructor with no'. |
128 | ' args, but that will result in an error for your class. You'. |
129 | ' need to provide a MooseX::Runnable::Invocation::Plugin or'. |
130 | ' ::Scheme for this class that will satisfy the requirements.'. |
131 | "\n". |
132 | "The class is @{[$class->name]}, and the required attributes are ". |
133 | join ', ', map { "'$_'" } @bad_attributes |
134 | if @bad_attributes; |
135 | |
136 | return; # return value is meaningless |
137 | } |
138 | |
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139 | sub create_instance { |
140 | my ($self, $class, @args) = @_; |
141 | return ($class->name->new, @args); |
142 | } |
143 | |
144 | sub start_application { |
145 | my $self = shift; |
146 | my $instance = shift; |
147 | my @args = @_; |
148 | |
149 | return $instance->run(@args); |
150 | } |
151 | |
152 | sub run { |
153 | my $self = shift; |
154 | my @args = @_; |
155 | |
156 | my $class = $self->load_class; |
157 | $self->apply_scheme($class); |
158 | $self->validate_class($class); |
159 | my ($instance, @more_args) = $self->create_instance($class, @args); |
160 | my $exit_code = $self->start_application($instance, @more_args); |
161 | return $exit_code; |
162 | } |
163 | |
164 | 1; |