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use strict; |
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use warnings; |
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package Perl::PrereqScanner::Scanner::Perl5 1.100; |
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# ABSTRACT: scan for core Perl 5 language indicators of required modules |
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use Moo; |
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with 'Perl::PrereqScanner::Scanner'; |
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#pod =head1 DESCRIPTION |
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#pod |
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#pod This scanner will look for the following indicators: |
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#pod |
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#pod =begin :list |
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#pod |
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#pod * plain lines beginning with C |
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#pod |
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#pod * regular inheritance declared with the C and C pragmata |
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#pod |
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#pod =end :list |
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#pod |
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#pod Since Perl does not allow you to supply a version requirement with a |
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#pod C statement, the scanner will check the statement after the |
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#pod C to see if it is C<< Module->VERSION( minimum_version ); >>. |
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#pod |
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#pod In order to provide a minimum version, that method call must meet the |
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#pod following requirements: |
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#pod |
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#pod =begin :list |
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#pod |
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#pod * it must be the very next statement after C. Nothing can separate them but whitespace and comments (and one semicolon). |
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#pod |
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#pod * C must be a bareword, and match the C exactly. |
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#pod |
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#pod * C must be a literal number, v-string, or single-quoted string. Double quotes are not allowed. |
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#pod |
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#pod =end :list |
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#pod |
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#pod =cut |
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sub scan_for_prereqs { |
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0
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my ($self, $ppi_doc, $req) = @_; |
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# regular use, require, and no |
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265
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100
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my $includes = $ppi_doc->find('Statement::Include') || []; |
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265
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173142
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for my $node ( @$includes ) { |
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# minimum perl version |
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173
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100
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3776
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if ( $node->version ) { |
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1
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$req->add_minimum(perl => $node->version); |
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1
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169
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next; |
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} |
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53
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# inheritance |
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172
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100
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4625
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if (grep { $_ eq $node->module } qw{ base parent }) { |
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344
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4705
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55
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# rt#55713: skip arguments to base or parent, focus only on inheritance |
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my @meat = grep { |
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100
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815
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$_->isa('PPI::Token::QuoteLike::Words') |
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1357
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|| $_->isa('PPI::Token::Quote') |
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} $node->arguments; |
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61
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33
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74
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my @parents = map { $self->_q_contents($_) } @meat; |
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108
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62
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33
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127
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$req->add_minimum($_ => 0) for @parents; |
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} |
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65
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# regular modules |
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172
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100
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5266
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my $version = $node->module_version ? $node->module_version->content : 0; |
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68
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# rt#55851: 'require $foo;' shouldn't add any prereq |
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172
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100
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10591
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next unless $node->module; |
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71
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# See if the next statement after require is Module->VERSION(min): |
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169
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100
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100
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4129
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$version = $self->_check_required_version($node) || 0 |
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100
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73
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if not $version and $node->type =~ /\A(?:require|use)\z/; |
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75
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169
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992
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$req->add_minimum($node->module, $version); |
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} |
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} |
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79
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# For "require Module", see if the next statement is Module->VERSION(min): |
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sub _check_required_version { |
81
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108
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108
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2795
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my ($self, $node) = @_; |
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83
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108
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314
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my $next = $node->snext_sibling; |
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85
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108
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100
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100
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3257
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return unless $next and $next->class eq 'PPI::Statement'; |
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87
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34
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243
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my ($invocant, $op, $method, $list, $too_much) = $next->schildren; |
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89
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34
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50
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100
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571
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return unless defined $list # need enough children |
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66
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66
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66
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66
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100
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66
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66
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33
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90
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and $op->class eq 'PPI::Token::Operator' |
91
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and $op->content eq '->' |
92
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and $method->content eq 'VERSION' |
93
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and (not defined $too_much # but not too many children |
94
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or $too_much->content eq ';') |
95
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and $invocant->content eq $node->module |
96
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and $list->class eq 'PPI::Structure::List' |
97
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and $list->braces eq '()' |
98
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and $list->schildren == 1; |
99
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100
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21
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1504
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my $exp = $list->schild(0); |
101
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102
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21
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100
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66
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258
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return unless $exp->class eq 'PPI::Statement::Expression' |
103
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and $exp->schildren == 1; |
104
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105
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18
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269
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my $arg = $exp->schild(0); |
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107
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18
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100
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33
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273
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if ($arg->isa('PPI::Token::Number')) { |
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50
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108
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12
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38
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return $arg->content; |
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} elsif ($arg->isa('PPI::Token::Quote') and $arg->can('literal')) { |
110
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6
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24
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return $arg->literal; |
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} |
112
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113
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0
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return; # No minimum version found |
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} # end _check_required_version |
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116
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1; |
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118
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__END__ |