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# Copyright (C) 2006-2007, David Muir Sharnoff |
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package Plugins; |
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use strict; |
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use warnings; |
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1751
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use UNIVERSAL qw(can); |
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use Carp; |
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1272
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our $VERSION = 0.41; |
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our $debug = 0; |
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sub new |
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{ |
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my ($pkg, %args) = @_; |
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my $context = $args{context} || {}; |
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my $pkg_override = $context->{pkg_override} || ''; |
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3
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100
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if ($pkg_override ne __PACKAGE__ |
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66
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and scalar(caller()) ne $pkg_override |
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and can($pkg_override, 'new') |
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and can($pkg_override, 'new') ne \&new) |
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{ |
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1
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my $new = can($pkg_override, 'new'); |
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50
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5
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croak "no new in $pkg_override" unless $new; |
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@_ = ($pkg_override, %args); |
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1
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goto &$new; # so caller() works |
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} |
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30
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2
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66
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my $self = bless { |
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%args, |
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list => undef, |
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new_list => undef, |
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plugins => {}, |
35
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new_config => undef, |
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config => {}, |
37
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configfile => $args{configfile} || $context->{configfile}, |
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context => $context, |
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requestor => $args{requestor} || scalar(caller()), |
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api => $args{api}, |
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}, $pkg; |
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43
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2
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9
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return $self; |
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} |
45
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46
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sub startconfig |
47
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{ |
48
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2
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2
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1
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4
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my ($self) = @_; |
49
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50
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2
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5
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$self->{new_list} = []; |
51
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2
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3
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$self->{new_config} = {}; |
52
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} |
53
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54
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sub readconfig |
55
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{ |
56
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2
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2
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1
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21
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my ($self, $configfile, %args) = @_; |
57
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58
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2
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50
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8
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croak "only one call to readconfig() before initialize()" if $self->{new_list}; |
59
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60
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2
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11
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$self->startconfig(); |
61
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2
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50
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6
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$args{self} ||= scalar(caller()); |
62
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2
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13
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$self->parseconfig($configfile, %args); |
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} |
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65
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0
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0
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1
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0
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sub parseconfig { croak "Plugins must be subclassed and the subclass must define a parseconfig() method"; }; |
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67
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our %required; |
68
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69
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sub pkg_invoke |
70
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{ |
71
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8
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8
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1
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18
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my ($self, $pkg, $method, @args) = @_; |
72
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8
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100
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21
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unless ($required{$pkg}++) { |
73
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1
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2
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my $p = $pkg; |
74
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1
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7
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$p =~ s!::!/!g; |
75
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1
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2
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eval { require "$p.pm" }; |
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1
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1018
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76
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1
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50
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1370
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die "require $p: $@" if $@; |
77
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} |
78
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8
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50
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30
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return undef unless $method; |
79
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0
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0
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my $f = can($pkg, $method); |
80
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0
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0
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0
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return undef unless $f; |
81
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0
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0
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return &$f(@args); |
82
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} |
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84
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my %used; |
85
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86
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# |
87
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# Plugins that aren't modules and need to be automagically |
88
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# turned into a module... |
89
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# |
90
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sub file_plugin |
91
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{ |
92
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0
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0
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1
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0
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my ($self, $file, %opts) = @_; |
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94
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0
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0
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0
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unless (-f $file) { |
95
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0
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0
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0
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$opts{search_path} ||= []; |
96
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0
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0
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for my $dir (@{$opts{search_path}}) { |
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0
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0
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97
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0
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0
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0
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next unless -f "$dir/$file"; |
98
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0
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0
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$file = "$dir/$file"; |
99
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0
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0
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last; |
100
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} |
101
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} |
102
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0
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0
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0
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my $ref = $opts{referenced} || ''; |
103
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0
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0
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0
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croak "Could not open $file $ref" |
104
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unless -f $file; |
105
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0
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0
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my $pkg = $file; |
106
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0
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0
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$pkg =~ s/[^A-Z0-9a-z_]//g; |
107
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0
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0
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$pkg = "Plugins::AutoGenerated::$pkg"; |
108
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0
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0
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while($used{$pkg}++) { |
109
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0
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0
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$pkg .= "::R".int(rand(10000)); |
110
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} |
111
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112
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113
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0
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0
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require File::Slurp; |
114
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0
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0
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import File::Slurp; |
115
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116
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0
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0
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my $contents = read_file($file); |
117
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0
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0
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my $justbefore = "\n#line 0 $file\n"; |
118
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119
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# untaint |
120
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0
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0
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$contents =~ m/^(.*)/s; |
121
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0
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0
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$contents = $1; |
122
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123
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0
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0
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0
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$opts{prefile} ||= ''; |
124
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0
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0
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0
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$opts{postfile} ||= ''; |
125
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126
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0
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0
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0
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my $isa = $opts{isa} || 'Plugins::Plugin'; |
127
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128
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0
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0
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my $eval = sprintf("#line %d %s\n", __LINE__, __FILE__) . <
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129
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130
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package $pkg; |
131
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132
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our \@ISA = qw($isa); |
133
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use strict; |
134
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135
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$opts{prefile} |
136
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137
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$justbefore |
138
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$contents |
139
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140
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$opts{postfile} |
141
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1; |
142
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END |
143
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144
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0
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0
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eval $eval; |
145
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0
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0
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0
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die "eval $@" if $@; |
146
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0
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0
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return $pkg; |
147
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} |
148
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149
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sub genkey |
150
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{ |
151
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0
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0
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1
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0
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my ($self, $context) = @_; |
152
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0
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0
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my $key = "$context->{pkg}/$context->{configfile}"; |
153
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0
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0
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return $key; |
154
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} |
155
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156
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sub registerplugin |
157
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{ |
158
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4
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4
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1
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40
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my ($self, %context) = @_; |
159
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4
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8
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my $pkg = $context{pkg}; |
160
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{ |
161
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1
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1
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7
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no strict qw(refs); |
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1
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3
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1
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733
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4
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5
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162
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4
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16
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$self->pkg_invoke($pkg) |
163
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4
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50
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6
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unless %{"${pkg}::"}; |
164
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} |
165
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4
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16
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my $key = $self->genkey(\%context); |
166
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4
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50
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17
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$context{requestor} = $self->{requestor} unless $context{requestor}; |
167
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4
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50
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12
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croak "Duplicate registration of $pkg plugin at $context{file}:$context{lineno} and $self->{new_config}{$key}{file}:$self->{new_config}{$key}{lineno}\n" |
168
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if $self->{new_config}{$key}; |
169
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4
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12
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$self->{new_config}{$key} = \%context; |
170
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4
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7
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push(@{$self->{new_list}}, $key); |
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4
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7
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171
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4
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16
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return \%context; |
172
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} |
173
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174
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sub initialize |
175
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{ |
176
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2
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2
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0
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16
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my ($self, %args) = @_; |
177
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178
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2
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50
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9
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confess "readconfig() not called yet" unless defined $self->{new_list}; |
179
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180
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2
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50
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7
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if ($self->{list}) { |
181
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0
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0
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my @shutargs; |
182
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0
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0
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0
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@shutargs = @{$args{shutdown_args}} if $args{shutdown_args}; |
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0
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0
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183
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0
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0
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for my $old (@{$self->{list}}) { |
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0
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0
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184
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0
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0
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$self->{plugins}{$old}->shutdown(); |
185
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0
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0
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delete $self->{plugins}{$old}; |
186
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} |
187
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} |
188
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189
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2
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5
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$self->{config} = $self->{new_config}; |
190
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2
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4
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$self->{new_config} = undef; |
191
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2
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6
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$self->{list} = $self->{new_list}; |
192
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2
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3
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$self->{new_list} = undef; |
193
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194
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2
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3
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for my $key (@{$self->{list}}) { |
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2
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5
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195
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4
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20
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$self->{plugins}{$key} = $self->initialize_plugin($self->{config}{$key}); |
196
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} |
197
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} |
198
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199
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0
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0
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1
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0
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sub post_initialize { } |
200
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|
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|
201
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sub api |
202
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|
|
|
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|
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{ |
203
|
1
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|
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1
|
1
|
9
|
my ($self, $new) = @_; |
204
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1
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2
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my $old = $self->{api}; |
205
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1
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50
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6
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$self->{api} = $new if @_ > 1; |
206
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1
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3
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return $old; |
207
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} |
208
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209
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sub initialize_plugin |
210
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{ |
211
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4
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4
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1
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7
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my ($self, $context) = @_; |
212
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4
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8
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my $pkg = $context->{pkg}; |
213
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4
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50
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17
|
$context->{pkg_override} = ref($self) |
214
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unless $context->{pkg_override}; |
215
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4
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50
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20
|
my $new = can($pkg, 'new') |
216
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or confess "no new() method for $pkg. \@ISA for $pkg should include Plugins::Plugin"; |
217
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4
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50
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15
|
my $p = &$new($pkg, { context => $context, api => $self->{api} }, @{$context->{new_args}}) |
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4
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21
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218
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or confess "$pkg->new() returned false"; |
219
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4
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33
|
$self->post_initialize($context, $p); |
220
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4
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20
|
return $p; |
221
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} |
222
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223
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sub addplugin |
224
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{ |
225
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0
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0
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1
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0
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my ($self, %context) = @_; |
226
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0
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0
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my $pkg = $context{pkg}; |
227
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{ |
228
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1
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1
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6
|
no strict qw(refs); |
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1
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1
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1
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1006
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0
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0
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229
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0
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0
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$self->pkg_invoke($pkg) |
230
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0
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0
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0
|
unless %{"${pkg}::"}; |
231
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} |
232
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0
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0
|
my $key = $self->genkey(\%context); |
233
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0
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0
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0
|
if ($self->{plugins}{$key}) { |
234
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0
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0
|
$self->{plugins}{$key}->shutdown(); |
235
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|
} else { |
236
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0
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0
|
push(@{$self->{list}}, $key); |
|
0
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0
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237
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|
} |
238
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0
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0
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|
0
|
$context{requestor} = $self->{requestor} unless $context{requestor}; |
239
|
0
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|
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|
|
0
|
$self->{config}{$key} = \%context; |
240
|
0
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|
0
|
$self->{plugins}{$key} = $self->initialize_plugin(\%context); |
241
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|
|
} |
242
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243
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|
sub invoke |
244
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|
{ |
245
|
3
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3
|
1
|
39
|
my ($self, $method, @args) = @_; |
246
|
3
|
50
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|
9
|
confess "readconfig() not called yet" unless defined $self->{list}; |
247
|
3
|
50
|
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8
|
confess if $method =~ /::/; |
248
|
3
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6
|
for my $pkg (@{$self->{list}}) { |
|
3
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10
|
|
249
|
7
|
|
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|
|
465
|
my $plugin = $self->{plugins}{$pkg}; |
250
|
7
|
|
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|
29
|
$plugin->invoke($method, @args); |
251
|
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|
} |
252
|
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|
} |
253
|
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|
254
|
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|
|
sub invoke_until |
255
|
|
|
|
|
|
|
{ |
256
|
0
|
|
|
0
|
1
|
0
|
my ($self, $method, $satisfied, @args) = @_; |
257
|
0
|
0
|
|
|
|
0
|
confess "readconfig() not called yet" unless defined $self->{list}; |
258
|
0
|
|
|
|
|
0
|
for my $plugin ($self->plugins) { |
259
|
0
|
|
|
|
|
0
|
my @r; |
260
|
0
|
|
|
|
|
0
|
my $m = $plugin->can($method); |
261
|
0
|
|
|
|
|
0
|
my $pkg = ref($plugin); |
262
|
0
|
0
|
|
|
|
0
|
print STDERR "invoke_until $method on $pkg...\n" if $debug; |
263
|
0
|
0
|
|
|
|
0
|
next unless $m; |
264
|
0
|
0
|
|
|
|
0
|
if (wantarray) { |
265
|
0
|
|
|
|
|
0
|
@r = eval { &$m($plugin, @args); }; |
|
0
|
|
|
|
|
0
|
|
266
|
|
|
|
|
|
|
} else { |
267
|
0
|
|
|
|
|
0
|
$r[0] = eval { &$m($plugin, @args); }; |
|
0
|
|
|
|
|
0
|
|
268
|
|
|
|
|
|
|
} |
269
|
0
|
0
|
|
|
|
0
|
print STDERR " results = @r\n" if $debug; |
270
|
0
|
0
|
|
|
|
0
|
warn $@ if $@; |
271
|
0
|
0
|
|
|
|
0
|
if (&$satisfied(@r)) { |
272
|
0
|
0
|
|
|
|
0
|
print STDERR " satisfied!\n" if $debug; |
273
|
0
|
0
|
|
|
|
0
|
return @r if wantarray; |
274
|
0
|
|
|
|
|
0
|
return $r[0]; |
275
|
|
|
|
|
|
|
} |
276
|
0
|
0
|
|
|
|
0
|
print STDERR " NOT satisfied!\n" if $debug; |
277
|
|
|
|
|
|
|
} |
278
|
0
|
0
|
|
|
|
0
|
return () if wantarray; |
279
|
0
|
|
|
|
|
0
|
return undef; |
280
|
|
|
|
|
|
|
} |
281
|
|
|
|
|
|
|
|
282
|
|
|
|
|
|
|
|
283
|
|
|
|
|
|
|
sub plugins |
284
|
|
|
|
|
|
|
{ |
285
|
1
|
|
|
1
|
1
|
16
|
my ($self) = @_; |
286
|
1
|
50
|
|
|
|
6
|
confess "readconfig() not called yet" unless defined $self->{list}; |
287
|
1
|
|
|
|
|
2
|
return map { $self->{plugins}{$_} } @{$self->{list}}; |
|
3
|
|
|
|
|
14
|
|
|
1
|
|
|
|
|
2
|
|
288
|
|
|
|
|
|
|
} |
289
|
|
|
|
|
|
|
|
290
|
|
|
|
|
|
|
sub iterator |
291
|
|
|
|
|
|
|
{ |
292
|
0
|
|
|
0
|
1
|
0
|
my ($self, $method) = @_; |
293
|
0
|
0
|
|
|
|
0
|
confess "readconfig() not called yet" unless defined $self->{list}; |
294
|
0
|
|
|
|
|
0
|
my @plugins = @{$self->{list}}; |
|
0
|
|
|
|
|
0
|
|
295
|
|
|
|
|
|
|
return sub { |
296
|
0
|
|
|
0
|
|
0
|
for (;;) { |
297
|
0
|
0
|
|
|
|
0
|
return () unless @plugins; |
298
|
0
|
|
|
|
|
0
|
my $plugin = shift(@plugins); |
299
|
0
|
|
|
|
|
0
|
my $f = $self->{plugins}{$plugin}->can($method); |
300
|
0
|
0
|
|
|
|
0
|
next unless $f; |
301
|
0
|
|
|
|
|
0
|
return &$f($self->{plugins}{$plugin}, @_); |
302
|
|
|
|
|
|
|
} |
303
|
|
|
|
|
|
|
} |
304
|
0
|
|
|
|
|
0
|
} |
305
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
|
307
|
|
|
|
|
|
|
package Plugins::Plugin; |
308
|
|
|
|
|
|
|
|
309
|
1
|
|
|
1
|
|
7
|
use strict; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
33
|
|
310
|
1
|
|
|
1
|
|
6
|
use warnings; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
51
|
|
311
|
1
|
|
|
1
|
|
5
|
use Carp qw(cluck confess); |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
439
|
|
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
our $AUTOLOAD; |
314
|
|
|
|
|
|
|
|
315
|
0
|
|
|
0
|
|
0
|
sub DESTROY {} |
316
|
0
|
|
|
0
|
0
|
0
|
sub shutdown {} |
317
|
|
|
|
|
|
|
|
318
|
|
|
|
|
|
|
sub invoke |
319
|
|
|
|
|
|
|
{ |
320
|
22
|
|
|
22
|
0
|
3335
|
my ($self, $method, @args) = @_; |
321
|
22
|
50
|
|
|
|
48
|
if ($Plugins::debug) { |
322
|
0
|
|
|
|
|
0
|
my $pkg = ref($self); |
323
|
0
|
|
|
|
|
0
|
print STDERR "Invoking $method on $pkg\n"; |
324
|
|
|
|
|
|
|
} |
325
|
22
|
50
|
|
|
|
53
|
confess if $method =~ /::/; |
326
|
22
|
|
|
|
|
55
|
my $m = $self->can($method); |
327
|
22
|
50
|
|
|
|
47
|
return undef unless $m; |
328
|
22
|
|
|
|
|
75
|
&$m($self, @args); |
329
|
|
|
|
|
|
|
} |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
sub new |
332
|
|
|
|
|
|
|
{ |
333
|
0
|
|
|
0
|
0
|
|
my ($pkg, $pconfig, %args) = @_; |
334
|
0
|
|
|
|
|
|
return bless { context => $pconfig->{context}, api => $pconfig->{api}, config => \%args }, $pkg; |
335
|
|
|
|
|
|
|
} |
336
|
|
|
|
|
|
|
|
337
|
|
|
|
|
|
|
sub AUTOLOAD |
338
|
|
|
|
|
|
|
{ |
339
|
0
|
|
|
0
|
|
|
my $self = shift; |
340
|
|
|
|
|
|
|
|
341
|
0
|
|
|
|
|
|
my $auto = $AUTOLOAD; |
342
|
0
|
|
|
|
|
|
my $ref = ref($self); |
343
|
0
|
|
|
|
|
|
my $p = __PACKAGE__; |
344
|
0
|
0
|
|
|
|
|
$auto =~ s/^${ref}::// or $auto =~ s/^${p}:://; |
345
|
0
|
0
|
|
|
|
|
return $self->{myapi}->invoke($auto, @_) |
346
|
|
|
|
|
|
|
if $self->{myapi}; |
347
|
0
|
0
|
|
|
|
|
return $self->{api}->invoke($auto, @_) |
348
|
|
|
|
|
|
|
if $self->{api}; |
349
|
0
|
|
|
|
|
|
cluck "No method '$auto'"; |
350
|
|
|
|
|
|
|
} |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
1; |
353
|
|
|
|
|
|
|
|