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stmt |
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pod |
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code |
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package Perl::ToPerl6::TransformerFactory; |
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3
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1
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use 5.006001; |
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4
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1
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use strict; |
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2
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18
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5
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5
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use warnings; |
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1
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23
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6
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1
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4
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use English qw(-no_match_vars); |
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2
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8
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9
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1
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1
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477
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use File::Spec::Unix qw(); |
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3
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1
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23
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10
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1
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1
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5
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use List::Util qw(max); |
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1
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1
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94
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use List::MoreUtils qw(any); |
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2
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1
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8
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12
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13
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1
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52
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use Perl::ToPerl6::Utils qw{ |
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:characters |
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$TRANSFORMER_NAMESPACE |
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:data_conversion |
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transformer_long_name |
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transformer_short_name |
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:internal_lookup |
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1
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1
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366
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}; |
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1
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2
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21
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1
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1
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787
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use Perl::ToPerl6::TransformerConfig; |
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3
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1
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31
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22
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1
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1
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5
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use Perl::ToPerl6::Exception::AggregateConfiguration; |
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1
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2
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1
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35
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23
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1
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1
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5
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use Perl::ToPerl6::Exception::Configuration; |
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2
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1
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32
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24
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1
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1
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5
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use Perl::ToPerl6::Exception::Fatal::Generic qw{ throw_generic }; |
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1
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1
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43
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25
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1
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1
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4
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use Perl::ToPerl6::Exception::Fatal::Internal qw{ throw_internal }; |
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1
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2
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1
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39
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26
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use Perl::ToPerl6::Exception::Fatal::TransformerDefinition |
27
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1
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1
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529
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qw{ throw_transformer_definition }; |
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1
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3
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1
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19
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28
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1
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1
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564
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use Perl::ToPerl6::Exception::Configuration::NonExistentTransformer qw< >; |
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1
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2
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1
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22
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29
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1
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1
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5
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use Perl::ToPerl6::Utils::Constants qw{ :profile_strictness }; |
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1
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1
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1
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119
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30
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31
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1
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1
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4
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use Exception::Class; # this must come after "use P::C::Exception::*" |
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1
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4
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1
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5
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32
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33
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#----------------------------------------------------------------------------- |
34
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35
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# Globals. Ick! |
36
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my @site_transformer_names = (); |
37
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38
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#----------------------------------------------------------------------------- |
39
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40
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# Blech!!! This is ug-lee. Belongs in the constructor. And it shouldn't be |
41
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# called "test" mode. |
42
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sub import { |
43
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44
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4
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4
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526
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my ( $class, %args ) = @_; |
45
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4
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14
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my $test_mode = $args{-test}; |
46
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4
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10
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my $extra_test_transformers = $args{'-extra-test-transformers'}; |
47
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48
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4
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100
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19
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if ( not @site_transformer_names ) { |
49
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1
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1
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my $eval_worked = eval { |
50
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1
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785
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require Module::Pluggable; |
51
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1
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11732
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Module::Pluggable->import(search_path => $TRANSFORMER_NAMESPACE, |
52
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require => 1, inner => 0); |
53
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1
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57
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@site_transformer_names = plugins(); #Exported by Module::Pluggable |
54
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1
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12276
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1; |
55
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}; |
56
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57
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1
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50
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6
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if (not $eval_worked) { |
58
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0
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0
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0
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if ( $EVAL_ERROR ) { |
59
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0
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0
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throw_generic |
60
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qq<Can't load Transformers from namespace "$TRANSFORMER_NAMESPACE": $EVAL_ERROR>; |
61
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} |
62
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63
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throw_generic |
64
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0
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0
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qq<Can't load Transformers from namespace "$TRANSFORMER_NAMESPACE" for an unknown reason.>; |
65
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} |
66
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67
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1
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50
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6
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if ( not @site_transformer_names ) { |
68
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0
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0
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throw_generic |
69
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qq<No Transformers found in namespace "$TRANSFORMER_NAMESPACE".>; |
70
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} |
71
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} |
72
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73
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# In test mode, only load native transformers, not third-party ones. So this |
74
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# filters out any transformer that was loaded from within a directory called |
75
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# "blib". During the usual "./Build test" process this works fine, |
76
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# but it doesn't work if you are using prove to test against the code |
77
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# directly in the lib/ directory. |
78
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79
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4
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100
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66
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1
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31
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if ( $test_mode && any {m/\b blib \b/xms} @INC ) { |
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1
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12
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80
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1
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7
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@site_transformer_names = _modules_from_blib( @site_transformer_names ); |
81
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82
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1
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50
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30
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if ($extra_test_transformers) { |
83
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my @extra_transformer_full_names = |
84
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0
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0
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map { "${TRANSFORMER_NAMESPACE}::$_" } @{$extra_test_transformers}; |
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0
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0
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0
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0
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85
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86
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0
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0
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push @site_transformer_names, @extra_transformer_full_names; |
87
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} |
88
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} |
89
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90
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4
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155
|
return 1; |
91
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} |
92
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93
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#----------------------------------------------------------------------------- |
94
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# Shuffle transformer order based on preferences, if any. |
95
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96
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# Transformers can request to run before or after a given list of other |
97
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# transformers. This code rewrites the list as follows: |
98
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# |
99
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# If transformer A requests to be run *before* transformer B, then we instead |
100
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# state that transformer B must be run *after* transformer A. It's the logical |
101
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# dual, but having only one kind of dependency to deal with makes it easier. |
102
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# |
103
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|
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sub _invert_dependencies { |
104
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1
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1
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3
|
my ($dependencies) = @_; |
105
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106
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1
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2
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for my $name ( keys %{ $dependencies } ) { |
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1
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5
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107
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37
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100
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77
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next unless $dependencies->{$name}{before}; |
108
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4
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5
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for my $_name ( keys %{ $dependencies->{$name}{before} } ) { |
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4
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9
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109
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6
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15
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$dependencies->{$_name}{after}{$name} = 1; |
110
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} |
111
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} |
112
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} |
113
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114
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# Collect the preferences for all the transformers we want to run. |
115
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# |
116
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sub _collect_preferences { |
117
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1
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1
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6
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my (@transformers) = @_; |
118
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1
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2
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my $preferences; |
119
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120
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1
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2
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for my $transformer ( @transformers ) { |
121
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37
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60
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my $ref_name = ref($transformer); |
122
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37
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95
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$ref_name =~ s< ^ Perl\::ToPerl6\::Transformer\:: ><>x; |
123
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37
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78
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$preferences->{$ref_name} = { }; |
124
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125
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# Get the list of transformers this module wants to run *after*. |
126
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# |
127
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37
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100
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208
|
if ( $transformer->can('run_before') ) { |
128
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4
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16
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my @before = $transformer->run_before(); |
129
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$preferences->{$ref_name}{before} = { map { |
130
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4
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7
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s< ^ Perl\::ToPerl6\::Transformer\:: ><>x; |
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6
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7
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131
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6
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21
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$_ => 1 |
132
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} @before }; |
133
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} |
134
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135
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# Get the list of transformers this module wants to run *before*. |
136
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# |
137
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37
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100
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220
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if ( $transformer->can('run_after') ) { |
138
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7
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27
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my @after = $transformer->run_after(); |
139
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$preferences->{$ref_name}{after} = { map { |
140
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7
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9
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s< ^ Perl\::ToPerl6\::Transformer\:: ><>x; |
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7
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11
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141
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7
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35
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$_ => 1 |
142
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} @after }; |
143
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} |
144
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} |
145
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146
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1
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4
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return $preferences; |
147
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} |
148
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149
|
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|
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|
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sub _validate_preferences { |
150
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1
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1
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3
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my ($preferences) = @_; |
151
|
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152
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1
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1
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for my $k ( keys %{ $preferences } ) { |
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1
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9
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153
|
37
|
100
|
33
|
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108
|
if ( $preferences->{$k} and |
154
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|
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|
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|
|
$preferences->{$k}{after} ) { |
155
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7
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8
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for my $_k ( keys %{ $preferences->{$k}{after} } ) { |
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7
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15
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156
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7
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50
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20
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next if exists $preferences->{$_k}; |
157
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0
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0
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die "Module $k wanted to run after module $_k, which was not found!\n"; |
158
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} |
159
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} |
160
|
37
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100
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33
|
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120
|
if ( $preferences->{$k} and |
161
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|
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|
|
$preferences->{$k}{before} ) { |
162
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4
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4
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for my $_k ( keys %{ $preferences->{$k}{before} } ) { |
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4
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11
|
|
163
|
6
|
50
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17
|
next if exists $preferences->{$_k}; |
164
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0
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|
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|
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0
|
die "Module $k wanted to run before module $_k, which was not found!\n"; |
165
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} |
166
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|
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} |
167
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|
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} |
168
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|
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} |
169
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170
|
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# Transformers can now request to be run before or after a given transformer. |
171
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# Or transformers. |
172
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|
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# |
173
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|
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# We honor those requests here, by collecting the transformers, calling |
174
|
|
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|
|
# ->run_before() and/or ->run_after(), to get what transformers they must |
175
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|
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|
# run after or before. |
176
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# |
177
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# Then we restate the 'before' requests in terms of 'after', dying for the |
178
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|
# moment if we can't find a module that a given module wants to run 'after'. |
179
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# |
180
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# After restating 'before' as 'after', we sort the modules in order of |
181
|
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# preference, then return the list in preference order. |
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# |
183
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sub topological_sort { |
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1
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5
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my @transformers = @_; |
185
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1
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3
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my @ordered; |
186
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187
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my %object; |
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1
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4
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for my $transformer ( @transformers ) { |
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66
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my $ref_name = ref $transformer; |
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$ref_name =~ s< ^ Perl\::ToPerl6\::Transformer\:: ><>x; |
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37
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$object{$ref_name} = $transformer; |
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} |
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1
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my $preferences = _collect_preferences(@transformers); |
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4
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_validate_preferences($preferences); |
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_invert_dependencies($preferences); |
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# This algorithm can potentially loop if it encounters a cycle in the |
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# dependencies. |
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# |
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# Specifically, the hash could look like this at the end: |
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# %foo = ( A => { after => { B => 1 } }, B => { after => { A => 1 } } ); |
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# In which case this algorithm wouldn't terminate. |
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# So we count down from the number of keys in the original hash. |
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# This should give us plenty of time to detect cycles. |
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# |
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# The cycle could be arbitrarily long, and while there are fancy |
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# algorithms to detect those, I'm not going to bother. |
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# |
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# Keeping the module names in a stable order reduces the likelihood |
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# that a cycle will "trap" (I.E. come before) a module that's not |
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# involved in the cycle. It still could happen, but I'll worry about that |
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# later on. |
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# |
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1
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3
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my %final; |
218
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1
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2
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my $iterations = keys %{ $preferences }; |
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1
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3
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219
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220
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1
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3
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while( keys %{ $preferences } ) { |
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9
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221
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2
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50
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6
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last if $iterations-- <= 0; # DO NOT REMOVE THIS. |
222
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2
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3
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for my $name ( sort keys %{ $preferences } ) { |
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2
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25
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223
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224
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# If a module needs to run after one or more modules, try to |
225
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# satisfy its request. |
226
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# |
227
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43
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100
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80
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if ( $preferences->{$name}{after} ) { |
228
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229
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# Walk the list of modules it needs to run after. |
230
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# |
231
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17
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18
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my $max = 0; |
232
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17
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18
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for my $_name ( keys %{ $preferences->{$name}{after} } ) { |
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17
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36
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233
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234
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# If it needs to run after a module we haven't placed in |
235
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# order, then abandon the loop. |
236
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# |
237
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19
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100
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38
|
if ( !exists $final{$_name} ) { |
238
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6
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7
|
$max = -1; |
239
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6
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9
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last; |
240
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} |
241
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13
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28
|
$max = max($final{$_name},$max); |
242
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} |
243
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244
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# If we haven't abandoned the loop, then |
245
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# add the module *after* the last module in order |
246
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# and delete the module from the preferences list. |
247
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# |
248
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17
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100
|
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38
|
if ( $max >= 0 ) { |
249
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11
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18
|
$final{$name} = $max + 1; |
250
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11
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27
|
delete $preferences->{$name}; |
251
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} |
252
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} |
253
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254
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# The module doesn't need to be run after any given module. |
255
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# So put it directly on the list, in group 0. |
256
|
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|
# |
257
|
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|
|
else { |
258
|
26
|
|
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|
31
|
$final{$name} = 0; |
259
|
26
|
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|
44
|
delete $preferences->{$name}; |
260
|
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|
|
} |
261
|
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} |
262
|
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|
} |
263
|
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264
|
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|
|
# If there are any keys remaining in the preferences array, it's possible |
265
|
|
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|
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|
|
# that the algorithm didn't sort dependencies correctly, but it is |
266
|
|
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|
|
# vastly more likely to be the case that we've encountered a cycle. |
267
|
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|
|
# Die, telling the user what happened. |
268
|
|
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|
|
# |
269
|
1
|
50
|
|
|
|
3
|
if ( keys %{ $preferences } ) { |
|
1
|
|
|
|
|
4
|
|
270
|
0
|
|
|
|
|
0
|
die "Found a preference loop among: " . join("\n", keys %{ $preferences }); |
|
0
|
|
|
|
|
0
|
|
271
|
|
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|
|
} |
272
|
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273
|
1
|
|
|
|
|
2
|
my %inverse; |
274
|
1
|
|
|
|
|
8
|
push @{$inverse{$final{$_}}}, $_ for keys %final; |
|
37
|
|
|
|
|
85
|
|
275
|
1
|
|
|
|
|
7
|
for ( sort keys %inverse ) { |
276
|
3
|
|
|
|
|
4
|
push @ordered, map { $object{$_} } @{$inverse{$_}}; |
|
37
|
|
|
|
|
57
|
|
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3
|
|
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5
|
|
277
|
|
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|
|
} |
278
|
|
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|
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|
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|
279
|
1
|
|
|
|
|
21
|
return @ordered; |
280
|
|
|
|
|
|
|
} |
281
|
|
|
|
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|
282
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
283
|
|
|
|
|
|
|
# Some static helper subs |
284
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
sub _modules_from_blib { |
286
|
1
|
|
|
1
|
|
15
|
my (@modules) = @_; |
287
|
1
|
|
|
|
|
3
|
return grep { _was_loaded_from_blib( _module2path($_) ) } @modules; |
|
37
|
|
|
|
|
66
|
|
288
|
|
|
|
|
|
|
} |
289
|
|
|
|
|
|
|
|
290
|
|
|
|
|
|
|
sub _module2path { |
291
|
37
|
|
50
|
37
|
|
62
|
my $module = shift || return; |
292
|
37
|
|
|
|
|
208
|
return File::Spec::Unix->catdir(split m/::/xms, $module) . '.pm'; |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
sub _was_loaded_from_blib { |
296
|
37
|
|
50
|
37
|
|
70
|
my $path = shift || return; |
297
|
37
|
|
|
|
|
98
|
my $full_path = $INC{$path}; |
298
|
37
|
|
33
|
|
|
212
|
return $full_path && $full_path =~ m/ (?: \A | \b b ) lib \b /xms; |
299
|
|
|
|
|
|
|
} |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
sub new { |
304
|
|
|
|
|
|
|
|
305
|
4
|
|
|
4
|
1
|
21
|
my ( $class, %args ) = @_; |
306
|
4
|
|
|
|
|
10
|
my $self = bless {}, $class; |
307
|
4
|
|
|
|
|
15
|
$self->_init( %args ); |
308
|
4
|
|
|
|
|
14
|
return $self; |
309
|
|
|
|
|
|
|
} |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
sub _init { |
314
|
|
|
|
|
|
|
|
315
|
4
|
|
|
4
|
|
12
|
my ($self, %args) = @_; |
316
|
|
|
|
|
|
|
|
317
|
4
|
|
|
|
|
7
|
my $profile = $args{-profile}; |
318
|
4
|
50
|
|
|
|
18
|
$self->{_profile} = $profile |
319
|
|
|
|
|
|
|
or throw_internal q{The -profile argument is required}; |
320
|
|
|
|
|
|
|
|
321
|
4
|
|
|
|
|
7
|
my $incoming_errors = $args{-errors}; |
322
|
4
|
|
|
|
|
8
|
my $profile_strictness = $args{'-profile-strictness'}; |
323
|
4
|
|
66
|
|
|
12
|
$profile_strictness ||= $PROFILE_STRICTNESS_DEFAULT; |
324
|
4
|
|
|
|
|
9
|
$self->{_profile_strictness} = $profile_strictness; |
325
|
|
|
|
|
|
|
|
326
|
4
|
50
|
|
|
|
13
|
if ( $profile_strictness ne $PROFILE_STRICTNESS_QUIET ) { |
327
|
4
|
|
|
|
|
5
|
my $errors; |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
# If we're supposed to be strict or problems have already been found... |
330
|
4
|
50
|
66
|
|
|
28
|
if ( |
|
|
|
33
|
|
|
|
|
331
|
|
|
|
|
|
|
$profile_strictness eq $PROFILE_STRICTNESS_FATAL |
332
|
3
|
|
|
|
|
101
|
or ( $incoming_errors and @{ $incoming_errors->exceptions() } ) |
333
|
|
|
|
|
|
|
) { |
334
|
0
|
0
|
|
|
|
0
|
$errors = |
335
|
|
|
|
|
|
|
$incoming_errors |
336
|
|
|
|
|
|
|
? $incoming_errors |
337
|
|
|
|
|
|
|
: Perl::ToPerl6::Exception::AggregateConfiguration->new(); |
338
|
|
|
|
|
|
|
} |
339
|
|
|
|
|
|
|
|
340
|
4
|
|
|
|
|
33
|
$self->_validate_transformers_in_profile( $errors ); |
341
|
|
|
|
|
|
|
|
342
|
4
|
50
|
66
|
|
|
18
|
if ( |
|
|
|
33
|
|
|
|
|
343
|
|
|
|
|
|
|
not $incoming_errors |
344
|
|
|
|
|
|
|
and $errors |
345
|
|
|
|
|
|
|
and $errors->has_exceptions() |
346
|
|
|
|
|
|
|
) { |
347
|
0
|
|
|
|
|
0
|
$errors->rethrow(); |
348
|
|
|
|
|
|
|
} |
349
|
|
|
|
|
|
|
} |
350
|
|
|
|
|
|
|
|
351
|
4
|
|
|
|
|
19
|
return $self; |
352
|
|
|
|
|
|
|
} |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
sub create_transformer { |
357
|
|
|
|
|
|
|
|
358
|
37
|
|
|
37
|
1
|
75
|
my ($self, %args ) = @_; |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
my $transformer_name = $args{-name} |
361
|
37
|
50
|
|
|
|
96
|
or throw_internal q{The -name argument is required}; |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
# Normalize transformer name to a fully-qualified package name |
364
|
37
|
|
|
|
|
89
|
$transformer_name = transformer_long_name( $transformer_name ); |
365
|
37
|
|
|
|
|
76
|
my $transformer_short_name = transformer_short_name( $transformer_name ); |
366
|
|
|
|
|
|
|
|
367
|
|
|
|
|
|
|
|
368
|
|
|
|
|
|
|
# Get the transformer parameters from the user profile if they were |
369
|
|
|
|
|
|
|
# not given to us directly. If none exist, use an empty hash. |
370
|
37
|
|
|
|
|
84
|
my $profile = $self->_profile(); |
371
|
37
|
|
|
|
|
44
|
my $transformer_config; |
372
|
37
|
50
|
|
|
|
74
|
if ( $args{-params} ) { |
373
|
|
|
|
|
|
|
$transformer_config = |
374
|
|
|
|
|
|
|
Perl::ToPerl6::TransformerConfig->new( |
375
|
|
|
|
|
|
|
$transformer_short_name, $args{-params} |
376
|
0
|
|
|
|
|
0
|
); |
377
|
|
|
|
|
|
|
} |
378
|
|
|
|
|
|
|
else { |
379
|
37
|
|
|
|
|
103
|
$transformer_config = $profile->transformer_params($transformer_name); |
380
|
37
|
|
33
|
|
|
107
|
$transformer_config ||= |
381
|
|
|
|
|
|
|
Perl::ToPerl6::TransformerConfig->new( $transformer_short_name ); |
382
|
|
|
|
|
|
|
} |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
# Pull out base parameters. |
385
|
37
|
|
|
|
|
74
|
return $self->_instantiate_transformer( $transformer_name, $transformer_config ); |
386
|
|
|
|
|
|
|
} |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
389
|
|
|
|
|
|
|
|
390
|
|
|
|
|
|
|
sub create_all_transformers { |
391
|
|
|
|
|
|
|
|
392
|
1
|
|
|
1
|
1
|
2
|
my ( $self, $incoming_errors ) = @_; |
393
|
|
|
|
|
|
|
|
394
|
1
|
50
|
|
|
|
4
|
my $errors = |
395
|
|
|
|
|
|
|
$incoming_errors |
396
|
|
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|
|
? $incoming_errors |
397
|
|
|
|
|
|
|
: Perl::ToPerl6::Exception::AggregateConfiguration->new(); |
398
|
1
|
|
|
|
|
6
|
my @transformers; |
399
|
|
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|
|
|
|
|
400
|
1
|
|
|
|
|
4
|
foreach my $name ( site_transformer_names() ) { |
401
|
37
|
|
|
|
|
53
|
my $transformer = eval { $self->create_transformer( -name => $name ) }; |
|
37
|
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|
108
|
|
402
|
|
|
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|
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|
|
403
|
37
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|
|
109
|
$errors->add_exception_or_rethrow( $EVAL_ERROR ); |
404
|
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|
|
|
405
|
37
|
50
|
|
|
|
93
|
if ( $transformer ) { |
406
|
37
|
|
|
|
|
846
|
push @transformers, $transformer; |
407
|
|
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|
|
} |
408
|
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|
|
} |
409
|
|
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|
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|
410
|
1
|
50
|
33
|
|
|
8
|
if ( not $incoming_errors and $errors->has_exceptions() ) { |
411
|
0
|
|
|
|
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0
|
$errors->rethrow(); |
412
|
|
|
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|
|
|
} |
413
|
|
|
|
|
|
|
|
414
|
1
|
|
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|
12
|
my @sorted = topological_sort(@transformers); |
415
|
|
|
|
|
|
|
|
416
|
1
|
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|
13
|
return @sorted; |
417
|
|
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|
|
|
|
} |
418
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|
419
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|
|
|
#----------------------------------------------------------------------------- |
420
|
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|
|
|
|
421
|
|
|
|
|
|
|
sub site_transformer_names { |
422
|
5
|
|
|
5
|
1
|
75
|
my @sorted_transformer_names = sort @site_transformer_names; |
423
|
5
|
|
|
|
|
37
|
return @sorted_transformer_names; |
424
|
|
|
|
|
|
|
} |
425
|
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|
|
|
|
426
|
|
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|
|
#----------------------------------------------------------------------------- |
427
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|
|
|
|
|
428
|
|
|
|
|
|
|
sub _profile { |
429
|
41
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|
|
41
|
|
50
|
my ($self) = @_; |
430
|
|
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|
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|
431
|
41
|
|
|
|
|
71
|
return $self->{_profile}; |
432
|
|
|
|
|
|
|
} |
433
|
|
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|
|
|
|
|
434
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|
|
#----------------------------------------------------------------------------- |
435
|
|
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|
|
|
|
|
436
|
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|
|
# This two-phase initialization is caused by the historical lack of a |
437
|
|
|
|
|
|
|
# requirement for Transformers to invoke their super-constructor. |
438
|
|
|
|
|
|
|
sub _instantiate_transformer { |
439
|
37
|
|
|
37
|
|
49
|
my ($self, $transformer_name, $transformer_config) = @_; |
440
|
|
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|
|
|
|
441
|
37
|
|
|
|
|
106
|
$transformer_config->set_profile_strictness( $self->{_profile_strictness} ); |
442
|
|
|
|
|
|
|
|
443
|
37
|
|
|
|
|
43
|
my $transformer = eval { $transformer_name->new( %{$transformer_config} ) }; |
|
37
|
|
|
|
|
43
|
|
|
37
|
|
|
|
|
501
|
|
444
|
37
|
|
|
|
|
84
|
_handle_transformer_instantiation_exception( |
445
|
|
|
|
|
|
|
$transformer_name, |
446
|
|
|
|
|
|
|
$transformer, # Note: being used as a boolean here. |
447
|
|
|
|
|
|
|
$EVAL_ERROR, |
448
|
|
|
|
|
|
|
); |
449
|
|
|
|
|
|
|
|
450
|
37
|
|
|
|
|
99
|
$transformer->__set_config( $transformer_config ); |
451
|
|
|
|
|
|
|
|
452
|
37
|
|
|
|
|
46
|
my $eval_worked = eval { $transformer->__set_base_parameters(); 1; }; |
|
37
|
|
|
|
|
193
|
|
|
37
|
|
|
|
|
57
|
|
453
|
37
|
|
|
|
|
71
|
_handle_transformer_instantiation_exception( |
454
|
|
|
|
|
|
|
$transformer_name, $eval_worked, $EVAL_ERROR, |
455
|
|
|
|
|
|
|
); |
456
|
|
|
|
|
|
|
|
457
|
37
|
|
|
|
|
103
|
return $transformer; |
458
|
|
|
|
|
|
|
} |
459
|
|
|
|
|
|
|
|
460
|
|
|
|
|
|
|
sub _handle_transformer_instantiation_exception { |
461
|
74
|
|
|
74
|
|
120
|
my ($transformer_name, $eval_worked, $eval_error) = @_; |
462
|
|
|
|
|
|
|
|
463
|
74
|
50
|
|
|
|
172
|
if (not $eval_worked) { |
464
|
0
|
0
|
|
|
|
0
|
if ($eval_error) { |
465
|
0
|
|
|
|
|
0
|
my $exception = Exception::Class->caught(); |
466
|
|
|
|
|
|
|
|
467
|
0
|
0
|
|
|
|
0
|
if (ref $exception) { |
468
|
0
|
|
|
|
|
0
|
$exception->rethrow(); |
469
|
|
|
|
|
|
|
} |
470
|
|
|
|
|
|
|
|
471
|
|
|
|
|
|
|
throw_transformer_definition( |
472
|
0
|
|
|
|
|
0
|
qq<Unable to create transformer "$transformer_name": $eval_error>); |
473
|
|
|
|
|
|
|
} |
474
|
|
|
|
|
|
|
|
475
|
|
|
|
|
|
|
throw_transformer_definition( |
476
|
0
|
|
|
|
|
0
|
qq<Unable to create transformer "$transformer_name" for an unknown reason.>); |
477
|
|
|
|
|
|
|
} |
478
|
|
|
|
|
|
|
|
479
|
74
|
|
|
|
|
853
|
return; |
480
|
|
|
|
|
|
|
} |
481
|
|
|
|
|
|
|
|
482
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
483
|
|
|
|
|
|
|
|
484
|
|
|
|
|
|
|
sub _validate_transformers_in_profile { |
485
|
4
|
|
|
4
|
|
6
|
my ($self, $errors) = @_; |
486
|
|
|
|
|
|
|
|
487
|
4
|
|
|
|
|
14
|
my $profile = $self->_profile(); |
488
|
4
|
|
|
|
|
14
|
my %known_transformers = hashify( $self->site_transformer_names() ); |
489
|
|
|
|
|
|
|
|
490
|
4
|
|
|
|
|
30
|
for my $transformer_name ( $profile->listed_transformers() ) { |
491
|
0
|
0
|
|
|
|
0
|
if ( not exists $known_transformers{$transformer_name} ) { |
492
|
0
|
|
|
|
|
0
|
my $message = qq{Transformer "$transformer_name" is not installed.}; |
493
|
|
|
|
|
|
|
|
494
|
0
|
0
|
|
|
|
0
|
if ( $errors ) { |
495
|
0
|
|
|
|
|
0
|
$errors->add_exception( |
496
|
|
|
|
|
|
|
Perl::ToPerl6::Exception::Configuration::NonExistentTransformer->new( |
497
|
|
|
|
|
|
|
transformer => $transformer_name, |
498
|
|
|
|
|
|
|
) |
499
|
|
|
|
|
|
|
); |
500
|
|
|
|
|
|
|
} |
501
|
|
|
|
|
|
|
else { |
502
|
0
|
|
|
|
|
0
|
warn qq{$message\n}; |
503
|
|
|
|
|
|
|
} |
504
|
|
|
|
|
|
|
} |
505
|
|
|
|
|
|
|
} |
506
|
|
|
|
|
|
|
|
507
|
4
|
|
|
|
|
16
|
return; |
508
|
|
|
|
|
|
|
} |
509
|
|
|
|
|
|
|
|
510
|
|
|
|
|
|
|
#----------------------------------------------------------------------------- |
511
|
|
|
|
|
|
|
|
512
|
|
|
|
|
|
|
1; |
513
|
|
|
|
|
|
|
|
514
|
|
|
|
|
|
|
__END__ |
515
|
|
|
|
|
|
|
|
516
|
|
|
|
|
|
|
|
517
|
|
|
|
|
|
|
=pod |
518
|
|
|
|
|
|
|
|
519
|
|
|
|
|
|
|
=for stopwords TransformerFactory -params |
520
|
|
|
|
|
|
|
|
521
|
|
|
|
|
|
|
=head1 NAME |
522
|
|
|
|
|
|
|
|
523
|
|
|
|
|
|
|
Perl::ToPerl6::TransformerFactory - Instantiates Transformer objects. |
524
|
|
|
|
|
|
|
|
525
|
|
|
|
|
|
|
|
526
|
|
|
|
|
|
|
=head1 DESCRIPTION |
527
|
|
|
|
|
|
|
|
528
|
|
|
|
|
|
|
This is a helper class that instantiates |
529
|
|
|
|
|
|
|
L<Perl::ToPerl6::Transformer|Perl::ToPerl6::Transformer> objects with the user's |
530
|
|
|
|
|
|
|
preferred parameters. There are no user-serviceable parts here. |
531
|
|
|
|
|
|
|
|
532
|
|
|
|
|
|
|
|
533
|
|
|
|
|
|
|
=head1 INTERFACE SUPPORT |
534
|
|
|
|
|
|
|
|
535
|
|
|
|
|
|
|
This is considered to be a non-public class. Its interface is subject |
536
|
|
|
|
|
|
|
to change without notice. |
537
|
|
|
|
|
|
|
|
538
|
|
|
|
|
|
|
|
539
|
|
|
|
|
|
|
=head1 CONSTRUCTOR |
540
|
|
|
|
|
|
|
|
541
|
|
|
|
|
|
|
=over |
542
|
|
|
|
|
|
|
|
543
|
|
|
|
|
|
|
=item C<< new( -profile => $profile, -errors => $config_errors ) >> |
544
|
|
|
|
|
|
|
|
545
|
|
|
|
|
|
|
Returns a reference to a new Perl::ToPerl6::TransformerFactory object. |
546
|
|
|
|
|
|
|
|
547
|
|
|
|
|
|
|
B<-profile> is a reference to a |
548
|
|
|
|
|
|
|
L<Perl::ToPerl6::UserProfile|Perl::ToPerl6::UserProfile> object. This |
549
|
|
|
|
|
|
|
argument is required. |
550
|
|
|
|
|
|
|
|
551
|
|
|
|
|
|
|
B<-errors> is a reference to an instance of |
552
|
|
|
|
|
|
|
L<Perl::ToPerl6::ConfigErrors|Perl::ToPerl6::ConfigErrors>. This |
553
|
|
|
|
|
|
|
argument is optional. If specified, than any problems found will be |
554
|
|
|
|
|
|
|
added to the object. |
555
|
|
|
|
|
|
|
|
556
|
|
|
|
|
|
|
|
557
|
|
|
|
|
|
|
=back |
558
|
|
|
|
|
|
|
|
559
|
|
|
|
|
|
|
|
560
|
|
|
|
|
|
|
=head1 METHODS |
561
|
|
|
|
|
|
|
|
562
|
|
|
|
|
|
|
=over |
563
|
|
|
|
|
|
|
|
564
|
|
|
|
|
|
|
=item C<< create_transformer( -name => $transformer_name, -params => \%param_hash ) >> |
565
|
|
|
|
|
|
|
|
566
|
|
|
|
|
|
|
Creates one Transformer object. If the object cannot be instantiated, it |
567
|
|
|
|
|
|
|
will throw a fatal exception. Otherwise, it returns a reference to |
568
|
|
|
|
|
|
|
the new Transformer object. |
569
|
|
|
|
|
|
|
|
570
|
|
|
|
|
|
|
B<-name> is the name of a L<Perl::ToPerl6::Transformer|Perl::ToPerl6::Transformer> |
571
|
|
|
|
|
|
|
subclass module. The C<'Perl::ToPerl6::Transformer'> portion of the name |
572
|
|
|
|
|
|
|
can be omitted for brevity. This argument is required. |
573
|
|
|
|
|
|
|
|
574
|
|
|
|
|
|
|
B<-params> is an optional reference to hash of parameters that will be |
575
|
|
|
|
|
|
|
passed into the constructor of the Transformer. If C<-params> is not |
576
|
|
|
|
|
|
|
defined, we will use the appropriate Transformer parameters from the |
577
|
|
|
|
|
|
|
L<Perl::ToPerl6::UserProfile|Perl::ToPerl6::UserProfile>. |
578
|
|
|
|
|
|
|
|
579
|
|
|
|
|
|
|
Note that the Transformer will not have had |
580
|
|
|
|
|
|
|
L<Perl::ToPerl6::Transformer/"initialize_if_enabled"> invoked on it, so it |
581
|
|
|
|
|
|
|
may not yet be usable. |
582
|
|
|
|
|
|
|
|
583
|
|
|
|
|
|
|
|
584
|
|
|
|
|
|
|
=item C< create_all_transformers() > |
585
|
|
|
|
|
|
|
|
586
|
|
|
|
|
|
|
Constructs and returns one instance of each |
587
|
|
|
|
|
|
|
L<Perl::ToPerl6::Transformer|Perl::ToPerl6::Transformer> subclass that is |
588
|
|
|
|
|
|
|
installed on the local system. Each Transformer will be created with the |
589
|
|
|
|
|
|
|
appropriate parameters from the user's configuration profile. |
590
|
|
|
|
|
|
|
|
591
|
|
|
|
|
|
|
Note that the Transformers will not have had |
592
|
|
|
|
|
|
|
L<Perl::ToPerl6::Transformer/"initialize_if_enabled"> invoked on them, so |
593
|
|
|
|
|
|
|
they may not yet be usable. |
594
|
|
|
|
|
|
|
|
595
|
|
|
|
|
|
|
|
596
|
|
|
|
|
|
|
=back |
597
|
|
|
|
|
|
|
|
598
|
|
|
|
|
|
|
|
599
|
|
|
|
|
|
|
=head1 SUBROUTINES |
600
|
|
|
|
|
|
|
|
601
|
|
|
|
|
|
|
Perl::ToPerl6::TransformerFactory has a few static subroutines that are used |
602
|
|
|
|
|
|
|
internally, but may be useful to you in some way. |
603
|
|
|
|
|
|
|
|
604
|
|
|
|
|
|
|
=over |
605
|
|
|
|
|
|
|
|
606
|
|
|
|
|
|
|
=item C<topological_sort( @transformers )> |
607
|
|
|
|
|
|
|
|
608
|
|
|
|
|
|
|
Given a list of Transformer objects, reorder them into the order they need to |
609
|
|
|
|
|
|
|
be run. Variables::FormatSpecialVariables needs to reformat $0 before |
610
|
|
|
|
|
|
|
Variables::FormatMatchVariables transforms $1 into $0, for example. If you need |
611
|
|
|
|
|
|
|
to specify that a Transformer must be run before or after a given transformer |
612
|
|
|
|
|
|
|
or list of transformers, then in your Transformer create a C<sub run_before()> |
613
|
|
|
|
|
|
|
and/or C<sub run_after()> which returns a list of transformers that it must |
614
|
|
|
|
|
|
|
run before and/or after. |
615
|
|
|
|
|
|
|
|
616
|
|
|
|
|
|
|
If a transformer you specified doesn't exist, your transformer code should |
617
|
|
|
|
|
|
|
still run, but with a warning. |
618
|
|
|
|
|
|
|
|
619
|
|
|
|
|
|
|
=item C<site_transformer_names()> |
620
|
|
|
|
|
|
|
|
621
|
|
|
|
|
|
|
Returns a list of all the Transformer modules that are currently installed |
622
|
|
|
|
|
|
|
in the Perl::ToPerl6:Transformer namespace. These will include modules that |
623
|
|
|
|
|
|
|
are distributed with Perl::ToPerl6 plus any third-party modules that |
624
|
|
|
|
|
|
|
have been installed. |
625
|
|
|
|
|
|
|
|
626
|
|
|
|
|
|
|
|
627
|
|
|
|
|
|
|
=back |
628
|
|
|
|
|
|
|
|
629
|
|
|
|
|
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|
|
630
|
|
|
|
|
|
|
=head1 AUTHOR |
631
|
|
|
|
|
|
|
|
632
|
|
|
|
|
|
|
Jeffrey Goff <drforr@pobox.com> |
633
|
|
|
|
|
|
|
|
634
|
|
|
|
|
|
|
|
635
|
|
|
|
|
|
|
=head1 AUTHOR EMERITUS |
636
|
|
|
|
|
|
|
|
637
|
|
|
|
|
|
|
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com> |
638
|
|
|
|
|
|
|
|
639
|
|
|
|
|
|
|
|
640
|
|
|
|
|
|
|
=head1 COPYRIGHT |
641
|
|
|
|
|
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|
|
642
|
|
|
|
|
|
|
Copyright (c) 2015 Jeffrey Goff. All rights reserved. |
643
|
|
|
|
|
|
|
|
644
|
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify |
645
|
|
|
|
|
|
|
it under the same terms as Perl itself. The full text of this license |
646
|
|
|
|
|
|
|
can be found in the LICENSE file included with this module. |
647
|
|
|
|
|
|
|
|
648
|
|
|
|
|
|
|
=cut |
649
|
|
|
|
|
|
|
|
650
|
|
|
|
|
|
|
# Local Variables: |
651
|
|
|
|
|
|
|
# mode: cperl |
652
|
|
|
|
|
|
|
# cperl-indent-level: 4 |
653
|
|
|
|
|
|
|
# fill-column: 78 |
654
|
|
|
|
|
|
|
# indent-tabs-mode: nil |
655
|
|
|
|
|
|
|
# c-indentation-style: bsd |
656
|
|
|
|
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|
# End: |
657
|
|
|
|
|
|
|
# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround : |