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1 | package MooseX::Getopt::Basic; |
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2 | # ABSTRACT: MooseX::Getopt::Basic - role to implement the Getopt::Long functionality |
3 | |
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4 | use Moose::Role; |
5 | |
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6 | use MooseX::Getopt::OptionTypeMap; |
7 | use MooseX::Getopt::Meta::Attribute; |
8 | use MooseX::Getopt::Meta::Attribute::NoGetopt; |
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9 | use MooseX::Getopt::ProcessedArgv; |
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10 | use Carp (); |
11 | |
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12 | use Getopt::Long 2.37 (); |
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13 | |
14 | has ARGV => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt"); |
15 | has extra_argv => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt"); |
16 | |
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17 | sub process_argv { |
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18 | my ($class, @params) = @_; |
19 | |
20 | my $config_from_file; |
21 | if($class->meta->does_role('MooseX::ConfigFromFile')) { |
22 | local @ARGV = @ARGV; |
23 | |
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24 | # just get the configfile arg now; the rest of the args will be |
25 | # fetched later |
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26 | my $configfile; |
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27 | my $opt_parser = Getopt::Long::Parser->new( config => [ qw( no_auto_help pass_through ) ] ); |
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28 | $opt_parser->getoptions( "configfile=s" => \$configfile ); |
29 | |
30 | if(!defined $configfile) { |
31 | my $cfmeta = $class->meta->find_attribute_by_name('configfile'); |
32 | $configfile = $cfmeta->default if $cfmeta->has_default; |
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33 | if (ref $configfile eq 'CODE') { |
34 | # not sure theres a lot you can do with the class and may break some assumptions |
35 | # warn? |
36 | $configfile = &$configfile($class); |
37 | } |
38 | if (defined $configfile) { |
39 | $config_from_file = eval { |
40 | $class->get_config_from_file($configfile); |
41 | }; |
42 | if ($@) { |
43 | die $@ unless $@ =~ /Specified configfile '\Q$configfile\E' does not exist/; |
44 | } |
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45 | } |
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46 | } |
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47 | else { |
48 | $config_from_file = $class->get_config_from_file($configfile); |
49 | } |
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50 | } |
51 | |
52 | my $constructor_params = ( @params == 1 ? $params[0] : {@params} ); |
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53 | |
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54 | Carp::croak("Single parameters to new_with_options() must be a HASH ref") |
55 | unless ref($constructor_params) eq 'HASH'; |
56 | |
57 | my %processed = $class->_parse_argv( |
58 | options => [ |
59 | $class->_attrs_to_options( $config_from_file ) |
60 | ], |
61 | params => $constructor_params, |
62 | ); |
63 | |
64 | my $params = $config_from_file ? { %$config_from_file, %{$processed{params}} } : $processed{params}; |
65 | |
66 | # did the user request usage information? |
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67 | if ( $processed{usage} and $params->{help_flag} ) |
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68 | { |
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69 | $class->_getopt_full_usage($processed{usage}); |
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70 | } |
71 | |
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72 | return MooseX::Getopt::ProcessedArgv->new |
73 | ( |
74 | argv_copy => $processed{argv_copy}, |
75 | extra_argv => $processed{argv}, |
76 | usage => $processed{usage}, |
77 | constructor_params => $constructor_params, # explicit params to ->new |
78 | cli_params => $params, # params from CLI |
79 | ); |
80 | } |
81 | |
82 | sub new_with_options { |
83 | my ($class, @params) = @_; |
84 | |
85 | my $pa = $class->process_argv(@params); |
86 | |
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87 | $class->new( |
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88 | ARGV => $pa->argv_copy, |
89 | extra_argv => $pa->extra_argv, |
90 | ( $pa->usage ? ( usage => $pa->usage ) : () ), |
91 | %{ $pa->constructor_params }, # explicit params to ->new |
92 | %{ $pa->cli_params }, # params from CLI |
93 | ); |
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94 | } |
95 | |
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96 | sub _getopt_spec { shift->_traditional_spec(@_); } |
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97 | |
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98 | sub _parse_argv { |
99 | my ( $class, %params ) = @_; |
100 | |
101 | local @ARGV = @{ $params{params}{argv} || \@ARGV }; |
102 | |
103 | my ( $opt_spec, $name_to_init_arg ) = $class->_getopt_spec(%params); |
104 | |
105 | # Get a clean copy of the original @ARGV |
106 | my $argv_copy = [ @ARGV ]; |
107 | |
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108 | my @warnings; |
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109 | my ( $parsed_options, $usage ) = eval { |
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110 | local $SIG{__WARN__} = sub { push @warnings, @_ }; |
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111 | |
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112 | return $class->_getopt_get_options(\%params, $opt_spec); |
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113 | }; |
114 | |
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115 | $class->_getopt_spec_warnings(@warnings) if @warnings; |
116 | $class->_getopt_spec_exception(\@warnings, $@) if $@; |
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117 | |
118 | # Get a copy of the Getopt::Long-mangled @ARGV |
119 | my $argv_mangled = [ @ARGV ]; |
120 | |
121 | my %constructor_args = ( |
122 | map { |
123 | $name_to_init_arg->{$_} => $parsed_options->{$_} |
124 | } keys %$parsed_options, |
125 | ); |
126 | |
127 | return ( |
128 | params => \%constructor_args, |
129 | argv_copy => $argv_copy, |
130 | argv => $argv_mangled, |
131 | ( defined($usage) ? ( usage => $usage ) : () ), |
132 | ); |
133 | } |
134 | |
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135 | sub _getopt_get_options { |
136 | my ($class, $params, $opt_spec) = @_; |
137 | my %options; |
138 | Getopt::Long::GetOptions(\%options, @$opt_spec); |
139 | return ( \%options, undef ); |
140 | } |
141 | |
142 | sub _getopt_spec_warnings { } |
143 | |
144 | sub _getopt_spec_exception { |
145 | my ($self, $warnings, $exception) = @_; |
146 | die @$warnings, $exception; |
147 | } |
148 | |
149 | sub _getopt_full_usage { |
150 | my ($self, $usage) = @_; |
151 | $usage->die; |
152 | } |
153 | |
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154 | sub _usage_format { |
155 | return "usage: %c %o"; |
156 | } |
157 | |
158 | sub _traditional_spec { |
159 | my ( $class, %params ) = @_; |
160 | |
161 | my ( @options, %name_to_init_arg, %options ); |
162 | |
163 | foreach my $opt ( @{ $params{options} } ) { |
164 | push @options, $opt->{opt_string}; |
165 | |
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166 | my $identifier = $opt->{name}; |
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167 | $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names |
168 | |
169 | $name_to_init_arg{$identifier} = $opt->{init_arg}; |
170 | } |
171 | |
172 | return ( \@options, \%name_to_init_arg ); |
173 | } |
174 | |
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175 | sub _compute_getopt_attrs { |
176 | my $class = shift; |
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177 | sort { $a->insertion_order <=> $b->insertion_order } |
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178 | grep { |
179 | $_->does("MooseX::Getopt::Meta::Attribute::Trait") |
180 | or |
181 | $_->name !~ /^_/ |
182 | } grep { |
183 | !$_->does('MooseX::Getopt::Meta::Attribute::Trait::NoGetopt') |
184 | } $class->meta->get_all_attributes |
185 | } |
186 | |
187 | sub _get_cmd_flags_for_attr { |
188 | my ( $class, $attr ) = @_; |
189 | |
190 | my $flag = $attr->name; |
191 | |
192 | my @aliases; |
193 | |
194 | if ($attr->does('MooseX::Getopt::Meta::Attribute::Trait')) { |
195 | $flag = $attr->cmd_flag if $attr->has_cmd_flag; |
196 | @aliases = @{ $attr->cmd_aliases } if $attr->has_cmd_aliases; |
197 | } |
198 | |
199 | return ( $flag, @aliases ); |
200 | } |
201 | |
202 | sub _attrs_to_options { |
203 | my $class = shift; |
204 | my $config_from_file = shift || {}; |
205 | |
206 | my @options; |
207 | |
208 | foreach my $attr ($class->_compute_getopt_attrs) { |
209 | my ( $flag, @aliases ) = $class->_get_cmd_flags_for_attr($attr); |
210 | |
211 | my $opt_string = join(q{|}, $flag, @aliases); |
212 | |
213 | if ($attr->name eq 'configfile') { |
214 | $opt_string .= '=s'; |
215 | } |
216 | elsif ($attr->has_type_constraint) { |
217 | my $type = $attr->type_constraint; |
218 | if (MooseX::Getopt::OptionTypeMap->has_option_type($type)) { |
219 | $opt_string .= MooseX::Getopt::OptionTypeMap->get_option_type($type) |
220 | } |
221 | } |
222 | |
223 | push @options, { |
224 | name => $flag, |
225 | init_arg => $attr->init_arg, |
226 | opt_string => $opt_string, |
227 | required => $attr->is_required && !$attr->has_default && !$attr->has_builder && !exists $config_from_file->{$attr->name}, |
228 | # NOTE: |
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229 | # this "feature" was breaking because |
230 | # Getopt::Long::Descriptive would return |
231 | # the default value as if it was a command |
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232 | # line flag, which would then override the |
233 | # one passed into a constructor. |
234 | # See 100_gld_default_bug.t for an example |
235 | # - SL |
236 | #( ( $attr->has_default && ( $attr->is_default_a_coderef xor $attr->is_lazy ) ) ? ( default => $attr->default({}) ) : () ), |
237 | ( $attr->has_documentation ? ( doc => $attr->documentation ) : () ), |
238 | } |
239 | } |
240 | |
241 | return @options; |
242 | } |
243 | |
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244 | no Moose::Role; |
245 | 1; |
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246 | |
247 | =head1 SYNOPSIS |
248 | |
249 | ## In your class |
250 | package My::App; |
251 | use Moose; |
252 | |
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253 | with 'MooseX::Getopt::Basic'; |
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254 | |
255 | has 'out' => (is => 'rw', isa => 'Str', required => 1); |
256 | has 'in' => (is => 'rw', isa => 'Str', required => 1); |
257 | |
258 | # ... rest of the class here |
259 | |
260 | ## in your script |
261 | #!/usr/bin/perl |
262 | |
263 | use My::App; |
264 | |
265 | my $app = My::App->new_with_options(); |
266 | # ... rest of the script here |
267 | |
268 | ## on the command line |
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269 | % perl my_app_script.pl --in file.input --out file.dump |
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270 | |
271 | =head1 DESCRIPTION |
272 | |
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273 | This is like L<MooseX::Getopt> and can be used instead except that it |
274 | doesn't make use of L<Getopt::Long::Descriptive> (or "GLD" for short). |
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275 | |
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276 | =method new_with_options |
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277 | |
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278 | See L<MooseX::Getopt/new_with_options>. |
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279 | |
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280 | =cut |