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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 Try::Tiny; |
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11 | use Carp (); |
12 | |
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13 | use Getopt::Long 2.37 (); |
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14 | |
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15 | has ARGV => (is => 'rw', isa => 'ArrayRef', traits => ['NoGetopt']); |
16 | has extra_argv => (is => 'rw', isa => 'ArrayRef', traits => ['NoGetopt']); |
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17 | |
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18 | sub process_argv { |
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19 | my ($class, @params) = @_; |
20 | |
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21 | my $constructor_params = ( @params == 1 ? $params[0] : {@params} ); |
22 | |
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23 | my $config_from_file; |
24 | if($class->meta->does_role('MooseX::ConfigFromFile')) { |
25 | local @ARGV = @ARGV; |
26 | |
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27 | # just get the configfile arg now out of @ARGV; the rest of the args |
28 | # will be fetched later |
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29 | my $configfile; |
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30 | my $opt_parser = Getopt::Long::Parser->new( config => [ qw( no_auto_help pass_through no_auto_version ) ] ); |
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31 | $opt_parser->getoptions( "configfile=s" => \$configfile ); |
32 | |
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33 | my $cfmeta = $class->meta->find_attribute_by_name('configfile'); |
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34 | my $init_arg = $cfmeta->init_arg; |
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35 | |
36 | # was it passed to the constructor? |
37 | if (!defined $configfile) |
38 | { |
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39 | $configfile = $constructor_params->{$init_arg} if defined $init_arg; |
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40 | } |
41 | |
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42 | if(!defined $configfile) { |
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43 | # this is a classic legacy usecase documented in |
44 | # MooseX::ConfigFromFile that we should continue to support |
45 | $configfile = try { $class->configfile }; |
46 | |
47 | $configfile = $cfmeta->default |
48 | if not defined $configfile and $cfmeta->has_default; |
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49 | if (ref $configfile eq 'CODE') { |
50 | # not sure theres a lot you can do with the class and may break some assumptions |
51 | # warn? |
52 | $configfile = &$configfile($class); |
53 | } |
54 | if (defined $configfile) { |
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55 | $config_from_file = try { |
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56 | $class->get_config_from_file($configfile); |
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57 | } |
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58 | catch { |
59 | die $_ unless /Specified configfile '\Q$configfile\E' does not exist/; |
60 | }; |
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61 | } |
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62 | |
63 | $constructor_params->{$init_arg} = $configfile |
64 | if defined $configfile and defined $init_arg; |
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65 | } |
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66 | else { |
67 | $config_from_file = $class->get_config_from_file($configfile); |
68 | } |
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69 | } |
70 | |
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71 | Carp::croak("Single parameters to new_with_options() must be a HASH ref") |
72 | unless ref($constructor_params) eq 'HASH'; |
73 | |
74 | my %processed = $class->_parse_argv( |
75 | options => [ |
76 | $class->_attrs_to_options( $config_from_file ) |
77 | ], |
78 | params => $constructor_params, |
79 | ); |
80 | |
81 | my $params = $config_from_file ? { %$config_from_file, %{$processed{params}} } : $processed{params}; |
82 | |
83 | # did the user request usage information? |
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84 | if ( $processed{usage} and $params->{help_flag} ) { |
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85 | $class->print_usage_text($processed{usage}); |
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86 | } |
87 | |
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88 | return MooseX::Getopt::ProcessedArgv->new( |
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89 | argv_copy => $processed{argv_copy}, |
90 | extra_argv => $processed{argv}, |
91 | usage => $processed{usage}, |
92 | constructor_params => $constructor_params, # explicit params to ->new |
93 | cli_params => $params, # params from CLI |
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94 | ); |
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95 | } |
96 | |
97 | sub new_with_options { |
98 | my ($class, @params) = @_; |
99 | |
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100 | my $pa = $class->process_argv(@params); |
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101 | |
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102 | $class->new( |
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103 | ARGV => $pa->argv_copy, |
104 | extra_argv => $pa->extra_argv, |
105 | ( $pa->usage ? ( usage => $pa->usage ) : () ), |
106 | %{ $pa->constructor_params }, # explicit params to ->new |
107 | %{ $pa->cli_params }, # params from CLI |
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108 | ); |
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109 | } |
110 | |
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111 | sub _getopt_spec { shift->_traditional_spec(@_); } |
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112 | |
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113 | sub _parse_argv { |
114 | my ( $class, %params ) = @_; |
115 | |
116 | local @ARGV = @{ $params{params}{argv} || \@ARGV }; |
117 | |
118 | my ( $opt_spec, $name_to_init_arg ) = $class->_getopt_spec(%params); |
119 | |
120 | # Get a clean copy of the original @ARGV |
121 | my $argv_copy = [ @ARGV ]; |
122 | |
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123 | my @warnings; |
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124 | my ( $parsed_options, $usage ) = try { |
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125 | local $SIG{__WARN__} = sub { push @warnings, @_ }; |
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126 | |
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127 | return $class->_getopt_get_options(\%params, $opt_spec); |
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128 | } |
129 | catch { |
130 | $class->_getopt_spec_exception(\@warnings, $_); |
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131 | }; |
132 | |
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133 | $class->_getopt_spec_warnings(@warnings) if @warnings; |
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134 | |
135 | # Get a copy of the Getopt::Long-mangled @ARGV |
136 | my $argv_mangled = [ @ARGV ]; |
137 | |
138 | my %constructor_args = ( |
139 | map { |
140 | $name_to_init_arg->{$_} => $parsed_options->{$_} |
141 | } keys %$parsed_options, |
142 | ); |
143 | |
144 | return ( |
145 | params => \%constructor_args, |
146 | argv_copy => $argv_copy, |
147 | argv => $argv_mangled, |
148 | ( defined($usage) ? ( usage => $usage ) : () ), |
149 | ); |
150 | } |
151 | |
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152 | sub _getopt_get_options { |
153 | my ($class, $params, $opt_spec) = @_; |
154 | my %options; |
155 | Getopt::Long::GetOptions(\%options, @$opt_spec); |
156 | return ( \%options, undef ); |
157 | } |
158 | |
159 | sub _getopt_spec_warnings { } |
160 | |
161 | sub _getopt_spec_exception { |
162 | my ($self, $warnings, $exception) = @_; |
163 | die @$warnings, $exception; |
164 | } |
165 | |
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166 | # maintained for backwards compatibility only |
167 | sub _getopt_full_usage |
168 | { |
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169 | my ($self, $usage) = @_; |
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170 | print $usage->text; |
171 | exit 0; |
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172 | } |
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173 | #(this is already documented in MooseX::Getopt. But FIXME later, via RT#82195) |
174 | =for Pod::Coverage |
175 | print_usage_text |
176 | =cut |
177 | sub print_usage_text { shift->_getopt_full_usage(@_) } |
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178 | |
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179 | sub _usage_format { |
180 | return "usage: %c %o"; |
181 | } |
182 | |
183 | sub _traditional_spec { |
184 | my ( $class, %params ) = @_; |
185 | |
186 | my ( @options, %name_to_init_arg, %options ); |
187 | |
188 | foreach my $opt ( @{ $params{options} } ) { |
189 | push @options, $opt->{opt_string}; |
190 | |
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191 | my $identifier = $opt->{name}; |
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192 | $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names |
193 | |
194 | $name_to_init_arg{$identifier} = $opt->{init_arg}; |
195 | } |
196 | |
197 | return ( \@options, \%name_to_init_arg ); |
198 | } |
199 | |
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200 | sub _compute_getopt_attrs { |
201 | my $class = shift; |
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202 | sort { $a->insertion_order <=> $b->insertion_order } |
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203 | grep { |
204 | $_->does("MooseX::Getopt::Meta::Attribute::Trait") |
205 | or |
206 | $_->name !~ /^_/ |
207 | } grep { |
208 | !$_->does('MooseX::Getopt::Meta::Attribute::Trait::NoGetopt') |
209 | } $class->meta->get_all_attributes |
210 | } |
211 | |
212 | sub _get_cmd_flags_for_attr { |
213 | my ( $class, $attr ) = @_; |
214 | |
215 | my $flag = $attr->name; |
216 | |
217 | my @aliases; |
218 | |
219 | if ($attr->does('MooseX::Getopt::Meta::Attribute::Trait')) { |
220 | $flag = $attr->cmd_flag if $attr->has_cmd_flag; |
221 | @aliases = @{ $attr->cmd_aliases } if $attr->has_cmd_aliases; |
222 | } |
223 | |
224 | return ( $flag, @aliases ); |
225 | } |
226 | |
227 | sub _attrs_to_options { |
228 | my $class = shift; |
229 | my $config_from_file = shift || {}; |
230 | |
231 | my @options; |
232 | |
233 | foreach my $attr ($class->_compute_getopt_attrs) { |
234 | my ( $flag, @aliases ) = $class->_get_cmd_flags_for_attr($attr); |
235 | |
236 | my $opt_string = join(q{|}, $flag, @aliases); |
237 | |
238 | if ($attr->name eq 'configfile') { |
239 | $opt_string .= '=s'; |
240 | } |
241 | elsif ($attr->has_type_constraint) { |
242 | my $type = $attr->type_constraint; |
243 | if (MooseX::Getopt::OptionTypeMap->has_option_type($type)) { |
244 | $opt_string .= MooseX::Getopt::OptionTypeMap->get_option_type($type) |
245 | } |
246 | } |
247 | |
248 | push @options, { |
249 | name => $flag, |
250 | init_arg => $attr->init_arg, |
251 | opt_string => $opt_string, |
252 | required => $attr->is_required && !$attr->has_default && !$attr->has_builder && !exists $config_from_file->{$attr->name}, |
253 | # NOTE: |
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254 | # this "feature" was breaking because |
255 | # Getopt::Long::Descriptive would return |
256 | # the default value as if it was a command |
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257 | # line flag, which would then override the |
258 | # one passed into a constructor. |
259 | # See 100_gld_default_bug.t for an example |
260 | # - SL |
261 | #( ( $attr->has_default && ( $attr->is_default_a_coderef xor $attr->is_lazy ) ) ? ( default => $attr->default({}) ) : () ), |
262 | ( $attr->has_documentation ? ( doc => $attr->documentation ) : () ), |
263 | } |
264 | } |
265 | |
266 | return @options; |
267 | } |
268 | |
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269 | no Moose::Role; |
270 | 1; |
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271 | |
272 | =head1 SYNOPSIS |
273 | |
274 | ## In your class |
275 | package My::App; |
276 | use Moose; |
277 | |
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278 | with 'MooseX::Getopt::Basic'; |
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279 | |
280 | has 'out' => (is => 'rw', isa => 'Str', required => 1); |
281 | has 'in' => (is => 'rw', isa => 'Str', required => 1); |
282 | |
283 | # ... rest of the class here |
284 | |
285 | ## in your script |
286 | #!/usr/bin/perl |
287 | |
288 | use My::App; |
289 | |
290 | my $app = My::App->new_with_options(); |
291 | # ... rest of the script here |
292 | |
293 | ## on the command line |
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294 | % perl my_app_script.pl --in file.input --out file.dump |
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295 | |
296 | =head1 DESCRIPTION |
297 | |
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298 | This is like L<MooseX::Getopt> and can be used instead except that it |
299 | doesn't make use of L<Getopt::Long::Descriptive> (or "GLD" for short). |
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300 | |
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301 | =method new_with_options |
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302 | |
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303 | See L<MooseX::Getopt/new_with_options>. |
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304 | |
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305 | =method process_argv |
306 | |
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307 | See L<MooseX::Getopt/process_argv>. |
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308 | |
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309 | =cut |