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#!/usr/bin/perl |
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85677
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use strict; |
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use warnings; |
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use WWW::Shopify::Liquid; |
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package WWW::Shopify::Liquid::Debugger::Breakpoint; |
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sub new { |
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my ($package) = shift; |
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my $hash = shift; |
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$hash = {} unless $hash; |
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return bless { |
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%$hash |
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}, $package; |
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} |
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sub line { return $_[0]->{line}; } |
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sub file { return $_[0]->{file}; } |
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# Provides a low-level debugging interface to liquid. |
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package WWW::Shopify::Liquid::Debugger; |
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sub new { return bless { |
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renderer => $_[1], |
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breakpoints => [], |
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break_line => undef, |
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current_line => undef |
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}, $_[0]; } |
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use Scalar::Util qw(blessed reftype weaken); |
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use List::MoreUtils qw(uniq); |
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my @active_debuggers = (); |
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my $hooked_packages = {}; |
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sub dump { |
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my ($self, $item, $level) = @_; |
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$level = 0 unless $level; |
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my $tab = "\t"; |
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my $tabs = join("", ($tab x $level)); |
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my $accumulator = ''; |
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if (reftype($item)) { |
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if (reftype($item) eq 'HASH') { |
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if (blessed($item)) { |
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$accumulator .= do { my $a = ref($item); $a =~ s/WWW::Shopify::Liquid::(Tag|Token|Operator):://; uc($a) } . "\n"; |
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} else { |
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$accumulator .= $tabs . ref($item) . "\n"; |
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} |
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my @keys = grep { $_ ne "line" } keys(%$item); |
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if (int(@keys) > 1) { |
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for (sort(@keys)) { |
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$accumulator.= "$tabs$tab" . $self->dump($item->{$_}, $level+1); |
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} |
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} elsif (int(@keys) > 0) { |
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$accumulator.= "$tabs$tab" . $self->dump($item->{$keys[0]}, $level+1); |
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} |
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} elsif (reftype($item) eq 'ARRAY') { |
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$accumulator .= "\n"; |
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$accumulator .= "$tabs$tab" . $self->dump($_, $level+1) for (grep { defined $_ } @$item); |
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$accumulator .= "$tabs\n"; |
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} |
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} else { |
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return "null" unless defined $item; |
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return "'" . $item . "'\n"; |
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} |
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return $accumulator; |
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} |
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sub add_breakpoint { |
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my ($self, $context, $line) = @_; |
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push(@{$self->{breakpoints}}, WWW::Shopify::Liquid::Debugger::Breakpoint->new({ line => $line, file => $context })); |
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} |
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sub remove_breakpoint { |
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my ($self, $context, $line) = @_; |
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$self->{breakpoints} = [grep { $_->line != $line || $_->file ne $context } @{$self->{breakpoints}}]; |
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85
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} |
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sub render { |
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my ($self, $hash, $ast) = @_; |
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my $debugger = $self; |
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# Only breakpoint on tags. |
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my @tags = grep { $_->isa('WWW::Shopify::Liquid::Tag') } $ast->tokens; |
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# For every tag in here, modify the in-memory package, such that when render is called, before we call render, we call our new breakpoint method. |
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for (uniq(grep { !$hooked_packages->{$_} } map { ref($_) } @tags)) { |
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30
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95
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51452
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no strict 'refs'; |
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144
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1517
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96
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no warnings 'redefine'; |
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108
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1953
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no warnings 'closure'; |
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17433
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2
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my $qualified = $_ . "::render"; |
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my $original = *{$qualified}{CODE}; |
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101
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$hooked_packages->{$_} = 1; |
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100
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if ($original) { |
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129
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eval ("package $_; |
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104
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sub render { |
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WWW::Shopify::Liquid::Debugger->package_step(\$_[0]); |
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\$original->(\@_); |
107
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}"); |
108
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1
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50
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10
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if (my $exp = $@) { |
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die $exp; |
110
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} |
111
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} else { |
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eval ("package $_; |
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26
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113
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sub render { |
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WWW::Shopify::Liquid::Debugger->package_step(\$_[0]); |
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shift->SUPER::render(\@_); |
116
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}"); |
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} |
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} |
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push(@active_debuggers, $self); |
120
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3
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my @results = $self->{renderer}->render($hash, $ast); |
121
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3
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@active_debuggers = grep { $_ != $self } @active_debuggers; |
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122
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3
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return @results if wantarray; |
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3
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return $results[0]; |
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125
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} |
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127
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sub package_step { |
128
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0
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22
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my ($self, $element) = @_; |
129
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6
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36
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$_->step($element) for (@active_debuggers); |
130
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} |
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132
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133
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sub step { |
134
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6
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6
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0
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16
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my ($self, $element) = @_; |
135
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6
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27
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$self->{current_line} = $element->{line}; |
136
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6
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50
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33
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if (int(grep { $element->{line} && $element->{line}->[3] && $_->file eq $element->{line}->[3] && $element->{line}->[0] == $_->line } @{$self->{breakpoints}}) > 0) { |
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137
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2
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$self->break($element); |
138
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} |
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0
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249
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if ($self->{break_line} && $element->{line} && $element->{line} >= $self->{break_line}) { |
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0
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140
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0
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$self->{break_line} = undef; |
141
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0
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$self->break($element); |
142
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} |
143
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} |
144
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145
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sub continue { |
146
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0
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0
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my ($self) = @_; |
147
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} |
148
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149
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150
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sub next_line { |
151
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0
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0
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my ($self) = @_; |
152
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0
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0
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$self->{break_line} = $self->{current_line}+1; |
153
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$self->continue; |
154
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} |
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156
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157
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sub break { |
158
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0
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0
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my ($self) = @_; |
159
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} |
160
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161
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sub variable { |
162
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0
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0
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0
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my ($self) = @_; |
163
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164
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} |
165
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166
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167
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1; |