Commit | Line | Data |
5dac17c3 |
1 | |
2 | package MooseX::Getopt; |
3 | use Moose::Role; |
4 | |
8034a232 |
5 | use MooseX::Getopt::OptionTypeMap; |
5dac17c3 |
6 | use MooseX::Getopt::Meta::Attribute; |
0f8232b6 |
7 | use MooseX::Getopt::Meta::Attribute::NoGetopt; |
5dac17c3 |
8 | |
b56c8123 |
9 | use Carp (); |
10 | |
75a6449b |
11 | use Getopt::Long (); # GLD uses it anyway, doesn't hurt |
12 | use constant HAVE_GLD => not not eval { require Getopt::Long::Descriptive }; |
13 | |
105e05aa |
14 | our $VERSION = '0.18'; |
8034a232 |
15 | our $AUTHORITY = 'cpan:STEVAN'; |
16 | |
8f95e21d |
17 | has ARGV => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt"); |
18 | has extra_argv => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt"); |
3899e5df |
19 | |
5dac17c3 |
20 | sub new_with_options { |
bff3807b |
21 | my ($class, @params) = @_; |
5dac17c3 |
22 | |
4e086633 |
23 | my $config_from_file; |
b4a79051 |
24 | if($class->meta->does_role('MooseX::ConfigFromFile')) { |
4e086633 |
25 | local @ARGV = @ARGV; |
26 | |
b4a79051 |
27 | my $configfile; |
4e086633 |
28 | my $opt_parser = Getopt::Long::Parser->new( config => [ qw( pass_through ) ] ); |
29 | $opt_parser->getoptions( "configfile=s" => \$configfile ); |
b4a79051 |
30 | |
4e086633 |
31 | if(!defined $configfile) { |
9f1ec7c0 |
32 | my $cfmeta = $class->meta->find_attribute_by_name('configfile'); |
b4a79051 |
33 | $configfile = $cfmeta->default if $cfmeta->has_default; |
34 | } |
35 | |
36 | if(defined $configfile) { |
4e086633 |
37 | $config_from_file = $class->get_config_from_file($configfile); |
b4a79051 |
38 | } |
ee69c4ba |
39 | } |
40 | |
b56c8123 |
41 | my $constructor_params = ( @params == 1 ? $params[0] : {@params} ); |
42 | |
43 | Carp::croak("Single parameters to new_with_options() must be a HASH ref") |
44 | unless ref($constructor_params) eq 'HASH'; |
45 | |
4e086633 |
46 | my %processed = $class->_parse_argv( |
47 | options => [ |
48 | $class->_attrs_to_options( $config_from_file ) |
b56c8123 |
49 | ], |
50 | params => $constructor_params, |
4e086633 |
51 | ); |
52 | |
53 | my $params = $config_from_file ? { %$config_from_file, %{$processed{params}} } : $processed{params}; |
54 | |
47a89a8d |
55 | # did the user request usage information? |
56 | if ( $processed{usage} && ($params->{'?'} or $params->{help} or $params->{usage}) ) |
57 | { |
58 | $processed{usage}->die(); |
59 | } |
60 | |
ee211848 |
61 | $class->new( |
62 | ARGV => $processed{argv_copy}, |
63 | extra_argv => $processed{argv}, |
69061f7a |
64 | %$constructor_params, # explicit params to ->new |
ee69c4ba |
65 | %$params, # params from CLI |
ee211848 |
66 | ); |
67 | } |
68 | |
69 | sub _parse_argv { |
0e715336 |
70 | my ( $class, %params ) = @_; |
6bb4cb66 |
71 | |
0e715336 |
72 | local @ARGV = @{ $params{argv} || \@ARGV }; |
73 | |
75a6449b |
74 | my ( $opt_spec, $name_to_init_arg ) = ( HAVE_GLD ? $class->_gld_spec(%params) : $class->_traditional_spec(%params) ); |
ee211848 |
75 | |
76 | # Get a clean copy of the original @ARGV |
77 | my $argv_copy = [ @ARGV ]; |
78 | |
6bb4cb66 |
79 | my @err; |
80 | |
81 | my ( $parsed_options, $usage ) = eval { |
82 | local $SIG{__WARN__} = sub { push @err, @_ }; |
75a6449b |
83 | |
84 | if ( HAVE_GLD ) { |
85 | return Getopt::Long::Descriptive::describe_options($class->_usage_format(%params), @$opt_spec); |
86 | } else { |
87 | my %options; |
88 | Getopt::Long::GetOptions(\%options, @$opt_spec); |
3cc60720 |
89 | return ( \%options, undef ); |
75a6449b |
90 | } |
6bb4cb66 |
91 | }; |
92 | |
93 | die join "", grep { defined } @err, $@ if @err or $@; |
ee211848 |
94 | |
95 | # Get a copy of the Getopt::Long-mangled @ARGV |
96 | my $argv_mangled = [ @ARGV ]; |
97 | |
0e715336 |
98 | my %constructor_args = ( |
4e086633 |
99 | map { |
100 | $name_to_init_arg->{$_} => $parsed_options->{$_} |
101 | } keys %$parsed_options, |
ee211848 |
102 | ); |
0e715336 |
103 | |
913e7020 |
104 | return ( |
105 | params => \%constructor_args, |
106 | argv_copy => $argv_copy, |
107 | argv => $argv_mangled, |
3cc60720 |
108 | ( defined($usage) ? ( usage => $usage ) : () ), |
913e7020 |
109 | ); |
0e715336 |
110 | } |
111 | |
9287e912 |
112 | sub _usage_format { |
113 | return "usage: %c %o"; |
114 | } |
115 | |
75a6449b |
116 | sub _traditional_spec { |
117 | my ( $class, %params ) = @_; |
4e086633 |
118 | |
75a6449b |
119 | my ( @options, %name_to_init_arg, %options ); |
120 | |
121 | foreach my $opt ( @{ $params{options} } ) { |
122 | push @options, $opt->{opt_string}; |
41d0ab09 |
123 | |
124 | my $identifier = $opt->{name}; |
125 | $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names |
126 | |
127 | $name_to_init_arg{$identifier} = $opt->{init_arg}; |
75a6449b |
128 | } |
129 | |
130 | return ( \@options, \%name_to_init_arg ); |
131 | } |
132 | |
0e715336 |
133 | sub _gld_spec { |
134 | my ( $class, %params ) = @_; |
135 | |
136 | my ( @options, %name_to_init_arg ); |
137 | |
b56c8123 |
138 | my $constructor_params = $params{params}; |
139 | |
0e715336 |
140 | foreach my $opt ( @{ $params{options} } ) { |
141 | push @options, [ |
142 | $opt->{opt_string}, |
143 | $opt->{doc} || ' ', # FIXME new GLD shouldn't need this hack |
144 | { |
b56c8123 |
145 | ( ( $opt->{required} && !exists($constructor_params->{$opt->{init_arg}}) ) ? (required => $opt->{required}) : () ), |
630657d5 |
146 | # NOTE: |
147 | # remove this 'feature' because it didn't work |
148 | # all the time, and so is better to not bother |
149 | # since Moose will handle the defaults just |
150 | # fine anyway. |
151 | # - SL |
152 | #( exists $opt->{default} ? (default => $opt->{default}) : () ), |
0e715336 |
153 | }, |
154 | ]; |
155 | |
41d0ab09 |
156 | my $identifier = $opt->{name}; |
157 | $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names |
158 | |
159 | $name_to_init_arg{$identifier} = $opt->{init_arg}; |
0e715336 |
160 | } |
161 | |
162 | return ( \@options, \%name_to_init_arg ); |
ee211848 |
163 | } |
164 | |
bff3807b |
165 | sub _compute_getopt_attrs { |
166 | my $class = shift; |
bff3807b |
167 | grep { |
adbe3e57 |
168 | $_->does("MooseX::Getopt::Meta::Attribute::Trait") |
bff3807b |
169 | or |
170 | $_->name !~ /^_/ |
adbe3e57 |
171 | } grep { |
172 | !$_->does('MooseX::Getopt::Meta::Attribute::Trait::NoGetopt') |
e2dcd71d |
173 | } $class->meta->get_all_attributes |
bff3807b |
174 | } |
175 | |
4ad81caf |
176 | sub _get_cmd_flags_for_attr { |
177 | my ( $class, $attr ) = @_; |
178 | |
179 | my $flag = $attr->name; |
180 | |
181 | my @aliases; |
182 | |
adbe3e57 |
183 | if ($attr->does('MooseX::Getopt::Meta::Attribute::Trait')) { |
4ad81caf |
184 | $flag = $attr->cmd_flag if $attr->has_cmd_flag; |
185 | @aliases = @{ $attr->cmd_aliases } if $attr->has_cmd_aliases; |
186 | } |
187 | |
188 | return ( $flag, @aliases ); |
189 | } |
190 | |
ee211848 |
191 | sub _attrs_to_options { |
192 | my $class = shift; |
4e086633 |
193 | my $config_from_file = shift || {}; |
ee211848 |
194 | |
195 | my @options; |
196 | |
bff3807b |
197 | foreach my $attr ($class->_compute_getopt_attrs) { |
4ad81caf |
198 | my ( $flag, @aliases ) = $class->_get_cmd_flags_for_attr($attr); |
ee211848 |
199 | |
4ad81caf |
200 | my $opt_string = join(q{|}, $flag, @aliases); |
de75868f |
201 | |
f4308031 |
202 | if ($attr->name eq 'configfile') { |
203 | $opt_string .= '=s'; |
204 | } |
205 | elsif ($attr->has_type_constraint) { |
365e5784 |
206 | my $type = $attr->type_constraint; |
207 | if (MooseX::Getopt::OptionTypeMap->has_option_type($type)) { |
208 | $opt_string .= MooseX::Getopt::OptionTypeMap->get_option_type($type) |
5dac17c3 |
209 | } |
210 | } |
f63e6310 |
211 | |
ee211848 |
212 | push @options, { |
4ad81caf |
213 | name => $flag, |
ee211848 |
214 | init_arg => $attr->init_arg, |
215 | opt_string => $opt_string, |
4e086633 |
216 | required => $attr->is_required && !$attr->has_default && !$attr->has_builder && !exists $config_from_file->{$attr->name}, |
630657d5 |
217 | # NOTE: |
218 | # this "feature" was breaking because |
219 | # Getopt::Long::Descriptive would return |
220 | # the default value as if it was a command |
221 | # line flag, which would then override the |
222 | # one passed into a constructor. |
223 | # See 100_gld_default_bug.t for an example |
224 | # - SL |
225 | #( ( $attr->has_default && ( $attr->is_default_a_coderef xor $attr->is_lazy ) ) ? ( default => $attr->default({}) ) : () ), |
ee211848 |
226 | ( $attr->has_documentation ? ( doc => $attr->documentation ) : () ), |
227 | } |
f63e6310 |
228 | } |
229 | |
ee211848 |
230 | return @options; |
5dac17c3 |
231 | } |
232 | |
8034a232 |
233 | no Moose::Role; 1; |
5dac17c3 |
234 | |
235 | __END__ |
236 | |
237 | =pod |
238 | |
239 | =head1 NAME |
240 | |
8034a232 |
241 | MooseX::Getopt - A Moose role for processing command line options |
5dac17c3 |
242 | |
243 | =head1 SYNOPSIS |
244 | |
4e086633 |
245 | ## In your class |
5dac17c3 |
246 | package My::App; |
247 | use Moose; |
4e086633 |
248 | |
5dac17c3 |
249 | with 'MooseX::Getopt'; |
4e086633 |
250 | |
5dac17c3 |
251 | has 'out' => (is => 'rw', isa => 'Str', required => 1); |
252 | has 'in' => (is => 'rw', isa => 'Str', required => 1); |
4e086633 |
253 | |
5dac17c3 |
254 | # ... rest of the class here |
4e086633 |
255 | |
5dac17c3 |
256 | ## in your script |
257 | #!/usr/bin/perl |
4e086633 |
258 | |
5dac17c3 |
259 | use My::App; |
4e086633 |
260 | |
5dac17c3 |
261 | my $app = My::App->new_with_options(); |
262 | # ... rest of the script here |
4e086633 |
263 | |
5dac17c3 |
264 | ## on the command line |
265 | % perl my_app_script.pl -in file.input -out file.dump |
266 | |
267 | =head1 DESCRIPTION |
268 | |
4e086633 |
269 | This is a role which provides an alternate constructor for creating |
270 | objects using parameters passed in from the command line. |
8034a232 |
271 | |
4e086633 |
272 | This module attempts to DWIM as much as possible with the command line |
273 | params by introspecting your class's attributes. It will use the name |
274 | of your attribute as the command line option, and if there is a type |
8034a232 |
275 | constraint defined, it will configure Getopt::Long to handle the option |
3899e5df |
276 | accordingly. |
277 | |
2814de27 |
278 | You can use the trait L<MooseX::Getopt::Meta::Attribute::Trait> or the |
279 | attribute metaclass L<MooseX::Getopt::Meta::Attribute> to get non-default |
280 | commandline option names and aliases. |
3899e5df |
281 | |
2814de27 |
282 | You can use the trait L<MooseX::Getopt::Meta::Attribute::Trait::NoGetopt> |
283 | or the attribute metaclass L<MooseX::Getopt::Meta::Attribute::NoGetopt> |
0f8232b6 |
284 | to have C<MooseX::Getopt> ignore your attribute in the commandline options. |
285 | |
3899e5df |
286 | By default, attributes which start with an underscore are not given |
287 | commandline argument support, unless the attribute's metaclass is set |
3d9a716d |
288 | to L<MooseX::Getopt::Meta::Attribute>. If you don't want you accessors |
289 | to have the leading underscore in thier name, you can do this: |
290 | |
291 | # for read/write attributes |
292 | has '_foo' => (accessor => 'foo', ...); |
4e086633 |
293 | |
3d9a716d |
294 | # or for read-only attributes |
4e086633 |
295 | has '_bar' => (reader => 'bar', ...); |
3d9a716d |
296 | |
4e086633 |
297 | This will mean that Getopt will not handle a --foo param, but your |
298 | code can still call the C<foo> method. |
8034a232 |
299 | |
ee69c4ba |
300 | If your class also uses a configfile-loading role based on |
301 | L<MooseX::ConfigFromFile>, such as L<MooseX::SimpleConfig>, |
302 | L<MooseX::Getopt>'s C<new_with_options> will load the configfile |
b4a79051 |
303 | specified by the C<--configfile> option (or the default you've |
304 | given for the configfile attribute) for you. |
305 | |
306 | Options specified in multiple places follow the following |
307 | precendence order: commandline overrides configfile, which |
308 | overrides explicit new_with_options parameters. |
ee69c4ba |
309 | |
8034a232 |
310 | =head2 Supported Type Constraints |
311 | |
312 | =over 4 |
313 | |
314 | =item I<Bool> |
315 | |
4e086633 |
316 | A I<Bool> type constraint is set up as a boolean option with |
8034a232 |
317 | Getopt::Long. So that this attribute description: |
318 | |
319 | has 'verbose' => (is => 'rw', isa => 'Bool'); |
320 | |
4e086633 |
321 | would translate into C<verbose!> as a Getopt::Long option descriptor, |
8034a232 |
322 | which would enable the following command line options: |
323 | |
324 | % my_script.pl --verbose |
4e086633 |
325 | % my_script.pl --noverbose |
326 | |
8034a232 |
327 | =item I<Int>, I<Float>, I<Str> |
328 | |
4e086633 |
329 | These type constraints are set up as properly typed options with |
8034a232 |
330 | Getopt::Long, using the C<=i>, C<=f> and C<=s> modifiers as appropriate. |
331 | |
332 | =item I<ArrayRef> |
333 | |
334 | An I<ArrayRef> type constraint is set up as a multiple value option |
335 | in Getopt::Long. So that this attribute description: |
336 | |
337 | has 'include' => ( |
4e086633 |
338 | is => 'rw', |
339 | isa => 'ArrayRef', |
8034a232 |
340 | default => sub { [] } |
341 | ); |
342 | |
4e086633 |
343 | would translate into C<includes=s@> as a Getopt::Long option descriptor, |
8034a232 |
344 | which would enable the following command line options: |
345 | |
346 | % my_script.pl --include /usr/lib --include /usr/local/lib |
347 | |
348 | =item I<HashRef> |
349 | |
350 | A I<HashRef> type constraint is set up as a hash value option |
351 | in Getopt::Long. So that this attribute description: |
352 | |
353 | has 'define' => ( |
4e086633 |
354 | is => 'rw', |
355 | isa => 'HashRef', |
8034a232 |
356 | default => sub { {} } |
357 | ); |
358 | |
4e086633 |
359 | would translate into C<define=s%> as a Getopt::Long option descriptor, |
8034a232 |
360 | which would enable the following command line options: |
361 | |
362 | % my_script.pl --define os=linux --define vendor=debian |
363 | |
364 | =back |
365 | |
366 | =head2 Custom Type Constraints |
367 | |
4e086633 |
368 | It is possible to create custom type constraint to option spec |
8034a232 |
369 | mappings if you need them. The process is fairly simple (but a |
4e086633 |
370 | little verbose maybe). First you create a custom subtype, like |
8034a232 |
371 | so: |
372 | |
373 | subtype 'ArrayOfInts' |
374 | => as 'ArrayRef' |
375 | => where { scalar (grep { looks_like_number($_) } @$_) }; |
376 | |
377 | Then you register the mapping, like so: |
378 | |
379 | MooseX::Getopt::OptionTypeMap->add_option_type_to_map( |
380 | 'ArrayOfInts' => '=i@' |
381 | ); |
382 | |
4e086633 |
383 | Now any attribute declarations using this type constraint will |
8034a232 |
384 | get the custom option spec. So that, this: |
385 | |
386 | has 'nums' => ( |
387 | is => 'ro', |
388 | isa => 'ArrayOfInts', |
389 | default => sub { [0] } |
390 | ); |
391 | |
392 | Will translate to the following on the command line: |
393 | |
394 | % my_script.pl --nums 5 --nums 88 --nums 199 |
395 | |
4e086633 |
396 | This example is fairly trivial, but more complex validations are |
8034a232 |
397 | easily possible with a little creativity. The trick is balancing |
398 | the type constraint validations with the Getopt::Long validations. |
399 | |
400 | Better examples are certainly welcome :) |
401 | |
f63e6310 |
402 | =head2 Inferred Type Constraints |
403 | |
404 | If you define a custom subtype which is a subtype of one of the |
405 | standard L</Supported Type Constraints> above, and do not explicitly |
406 | provide custom support as in L</Custom Type Constraints> above, |
407 | MooseX::Getopt will treat it like the parent type for Getopt |
408 | purposes. |
409 | |
410 | For example, if you had the same custom C<ArrayOfInts> subtype |
411 | from the examples above, but did not add a new custom option |
412 | type for it to the C<OptionTypeMap>, it would be treated just |
413 | like a normal C<ArrayRef> type for Getopt purposes (that is, |
414 | C<=s@>). |
415 | |
5dac17c3 |
416 | =head1 METHODS |
417 | |
418 | =over 4 |
419 | |
420 | =item B<new_with_options (%params)> |
421 | |
4e086633 |
422 | This method will take a set of default C<%params> and then collect |
8034a232 |
423 | params from the command line (possibly overriding those in C<%params>) |
424 | and then return a newly constructed object. |
425 | |
f63e6310 |
426 | If L<Getopt::Long/GetOptions> fails (due to invalid arguments), |
427 | C<new_with_options> will throw an exception. |
428 | |
47a89a8d |
429 | If L<Getopt::Long::Descriptive> is installed and any of the following |
430 | command line params are passed, the program will exit with usage |
431 | information. You can add descriptions for each option by including a |
432 | B<documentation> option for each attribute to document. |
433 | |
434 | --? |
435 | --help |
436 | --usage |
437 | |
fad5da09 |
438 | If you have L<Getopt::Long::Descriptive> a the C<usage> param is also passed to |
439 | C<new>. |
440 | |
3899e5df |
441 | =item B<ARGV> |
442 | |
443 | This accessor contains a reference to a copy of the C<@ARGV> array |
f63e6310 |
444 | as it originally existed at the time of C<new_with_options>. |
445 | |
446 | =item B<extra_argv> |
447 | |
448 | This accessor contains an arrayref of leftover C<@ARGV> elements that |
449 | L<Getopt::Long> did not parse. Note that the real C<@ARGV> is left |
450 | un-mangled. |
3899e5df |
451 | |
5dac17c3 |
452 | =item B<meta> |
453 | |
8034a232 |
454 | This returns the role meta object. |
455 | |
5dac17c3 |
456 | =back |
457 | |
458 | =head1 BUGS |
459 | |
4e086633 |
460 | All complex software has bugs lurking in it, and this module is no |
5dac17c3 |
461 | exception. If you find a bug please either email me, or add the bug |
462 | to cpan-RT. |
463 | |
464 | =head1 AUTHOR |
465 | |
466 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
467 | |
e2911e34 |
468 | Brandon L. Black, E<lt>blblack@gmail.comE<gt> |
469 | |
630657d5 |
470 | Yuval Kogman, E<lt>nothingmuch@woobling.orgE<gt> |
471 | |
78a71ae5 |
472 | =head1 CONTRIBUTORS |
473 | |
474 | Ryan D Johnson, E<lt>ryan@innerfence.comE<gt> |
475 | |
47a89a8d |
476 | Drew Taylor, E<lt>drew@drewtaylor.comE<gt> |
477 | |
5dac17c3 |
478 | =head1 COPYRIGHT AND LICENSE |
479 | |
adbe3e57 |
480 | Copyright 2007-2008 by Infinity Interactive, Inc. |
5dac17c3 |
481 | |
482 | L<http://www.iinteractive.com> |
483 | |
484 | This library is free software; you can redistribute it and/or modify |
485 | it under the same terms as Perl itself. |
486 | |
487 | =cut |