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package Piffle::Template; |
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28402
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use strict; |
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156
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use base qw{Exporter}; |
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use vars qw{@EXPORT_OK $VERSION $PACKAGE_NUM}; |
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use File::Spec; |
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93
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3838
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use Symbol; |
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4183
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284
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use Carp; |
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4327
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use utf8; |
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4454
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no bytes; |
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@EXPORT_OK = qw{template_to_perl expand_template}; |
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$VERSION = '0.3.1'; |
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15
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sub __make_package_name |
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{ |
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return sprintf("%s::G%05d", __PACKAGE__, ++$PACKAGE_NUM); |
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} |
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20
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21
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sub __slurp |
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{ |
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1
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1
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2
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my ($file, $rbuf) = @_; |
24
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1
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6
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my $fh = gensym(); |
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1
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16
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local $/; undef $/; |
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2
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26
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1
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50
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30
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open($fh, '<', $file) or croak("open $file: $!"); |
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1
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18
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$$rbuf = <$fh>; |
28
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1
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16
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close($fh); |
29
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} |
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31
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32
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sub __path_search |
33
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{ |
34
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1
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1
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3
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my ($item, @inc) = @_; |
35
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1
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3
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foreach my $dir (@inc) |
36
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{ |
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3
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36
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my $path = File::Spec->catfile($dir, $item); |
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3
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100
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38
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return $path if -f $path; |
39
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} |
40
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0
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0
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return undef; |
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} |
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43
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44
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sub __make_interpolation |
45
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{ |
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18
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18
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26
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my ($ivar, $itype) = @_; |
47
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18
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100
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43
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if ($itype eq 'raw') |
48
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{ |
49
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2
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9
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return ";print join('', ($ivar));\n"; |
50
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} |
51
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16
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35
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my $perl_line = ''; |
52
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16
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100
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44
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if ($itype eq 'uri') |
53
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{ |
54
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2
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8
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$perl_line = qq{ |
55
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;print join('', map { |
56
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local \$_ = pack('C*', unpack('C*', \$_)); |
57
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s{([^a-zA-Z0-9_.-])}{ |
58
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sprintf('%%%02X', ord(\$1)) |
59
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}eg; |
60
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\$_; |
61
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} ($ivar)); |
62
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}; |
63
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} |
64
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else |
65
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{ |
66
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14
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37
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$perl_line = qq{ |
67
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;print join('', map { |
68
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local \$_ = \$_; |
69
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s{([&"'<>])}{ |
70
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sprintf('%d;', ord(\$1)) |
71
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}eg; |
72
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\$_; |
73
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} ($ivar)); |
74
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}; |
75
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} |
76
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16
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88
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$perl_line =~ s/\n/\040/gs; |
77
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16
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175
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$perl_line =~ s/\s+/\040/g; |
78
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16
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55
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$perl_line =~ s/^\s*//g; |
79
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16
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251
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$perl_line =~ s/\s*$//g; |
80
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16
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60
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return $perl_line . "\n"; |
81
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} |
82
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83
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84
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sub expand_template |
85
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{ |
86
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9
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9
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1
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33
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my %opt = @_; |
87
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88
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# Various options |
89
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9
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14
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my ($in_buf, $filename, $errors_to, @inc); |
90
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9
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100
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12
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@inc = @{$opt{include_path} || []}; |
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9
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61
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91
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9
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50
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50
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$errors_to = $opt{errors_to} || 'die'; |
92
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93
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# Pick an input source |
94
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9
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50
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26
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if ($opt{source}) |
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0
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95
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{ |
96
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9
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16
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$in_buf = $opt{source}; |
97
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9
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17
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$filename = "AnonString"; |
98
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} |
99
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elsif ($opt{source_file}) |
100
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{ |
101
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0
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0
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my $file = $opt{source_file}; |
102
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0
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0
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0
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if (ref $file) |
103
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{ |
104
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0
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0
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$filename = "AnonFilehandle"; |
105
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0
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0
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local $/; undef $/; |
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0
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0
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106
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0
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0
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$in_buf = <$file>; |
107
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} |
108
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else |
109
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{ |
110
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0
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0
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__slurp($file, \$in_buf); |
111
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0
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0
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$filename = $file; |
112
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} |
113
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} |
114
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else |
115
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{ |
116
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0
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0
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croak "No source: use either 'source' or 'source_text'"; |
117
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} |
118
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119
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# Decide on where to stuff the output |
120
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9
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11
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my ($out_buf, $out_fh, $close_out); |
121
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9
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17
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$out_buf = ''; |
122
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9
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50
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33
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if ($opt{output_file}) |
123
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{ |
124
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0
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0
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my $file = $opt{output_file}; |
125
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0
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0
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local $/; |
126
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0
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0
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undef $/; |
127
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0
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0
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0
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if (ref $file) |
128
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{ |
129
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0
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0
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$out_fh = $file; |
130
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} |
131
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else |
132
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{ |
133
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0
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0
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$out_fh = gensym(); |
134
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0
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0
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0
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open($out_fh, '>', $file) |
135
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or croak("open $file: $!"); |
136
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0
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0
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$close_out = 1; |
137
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} |
138
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} |
139
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else |
140
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{ |
141
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9
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50
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37
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if ($] < 5.008) |
142
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{ |
143
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# They'll end up with weirdly-named files in the CWD |
144
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# if we don't give up here. |
145
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0
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0
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croak("Store-and-return is not supported for ". |
146
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"versions of Perl older than 5.8: you must use " . |
147
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"\"output_file\" instead. Croaked"); |
148
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} |
149
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4
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50
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4
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4671
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open($out_fh, '>>', \$out_buf) |
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4
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48
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4
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24
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9
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198
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150
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or croak("open-string failed: $!"); |
151
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9
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5162
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$close_out = 1; |
152
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} |
153
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154
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9
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50
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30
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if ($opt{reported_filename}) |
155
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{ |
156
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0
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0
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$filename = $opt{reported_filename}; |
157
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} |
158
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159
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# Transform |
160
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9
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30
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my $perl = template_to_perl($in_buf, $filename, @inc); |
161
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9
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27
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my $pkg = __make_package_name(); |
162
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9
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54
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my $old_out_fh = select($out_fh); |
163
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4
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4
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28
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eval "package $pkg;\nno strict;\n$perl"; |
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4
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2
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5
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4
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1
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1745
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2
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1
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12
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2
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1
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4
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2
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551
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1
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6
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1
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3
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1
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322
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1
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8
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1
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2
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1
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155
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1
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6
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1
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2
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1
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131
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9
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851
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164
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9
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781
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select($old_out_fh); |
165
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9
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50
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43
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close($out_fh) if $close_out; |
166
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9
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50
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35
|
if ($@) |
167
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{ |
168
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0
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0
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0
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if (! defined $errors_to) |
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0
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169
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{ |
170
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# suppress: no-op |
171
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} |
172
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elsif (ref($errors_to)) |
173
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{ |
174
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0
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0
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0
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if (ref($errors_to) eq 'CODE') |
175
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{ |
176
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0
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0
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$errors_to->($@); |
177
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} |
178
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else |
179
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{ |
180
|
0
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0
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print $errors_to $@; |
181
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} |
182
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} |
183
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else |
184
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{ |
185
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0
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0
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die $@; |
186
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} |
187
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|
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} |
188
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9
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|
58
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return $out_buf; #potentially undef |
189
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|
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} |
190
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191
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192
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sub expand |
193
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{ |
194
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9
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|
9
|
1
|
2373
|
my $self = shift; |
195
|
9
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|
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|
|
42
|
goto &expand_template; |
196
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} |
197
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198
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199
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sub template_to_perl |
200
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{ |
201
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10
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10
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1
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23
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my ($tmpl, $filename, @inc) = @_; |
202
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10
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44
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$filename =~ m/^(.*)$/; |
203
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10
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31
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$filename = $1; |
204
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10
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19
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$filename =~ s/\"/\"\"/g; |
205
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10
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14
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my $nlines = 1; |
206
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10
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16
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my $perl_script = ''; |
207
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10
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30
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pos($tmpl) = 0; |
208
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10
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99
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while ($tmpl =~ m{ |
209
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\G (.*?) #1: preceding or final plaintext |
210
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(?: \{ ([\%\$\@] \w+) #2: scalar interpolation |
211
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(?:,(\w+))? \} #3: ... with explicit escaping |
212
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| \<\?include (\s+.*?) \?\> #4: textual inclusion |
213
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| \<\?perl (\s+.*?) \?\> #5: perl blocks |
214
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| \z |
215
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) |
216
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}gsxi) |
217
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{ |
218
|
55
|
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93
|
my $txt = $1; |
219
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55
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|
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|
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104
|
my ($ivar, $itype) = ($2, $3); |
220
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55
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120
|
my $include = $4; |
221
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55
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|
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|
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80
|
my $perl = $5; |
222
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55
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100
|
66
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|
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233
|
if (defined($txt) && $txt ne '') |
223
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|
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|
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{ |
224
|
31
|
|
|
|
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49
|
$txt =~ s/([\'\\])/\\$1/gs; |
225
|
31
|
|
|
|
|
56
|
$perl_script .= "\n#line $nlines"; |
226
|
31
|
50
|
|
|
|
74
|
$perl_script .= " \"$filename\"" |
227
|
|
|
|
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|
|
if defined $filename; |
228
|
31
|
|
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|
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54
|
$perl_script .= "\n;print '$txt';\n"; |
229
|
31
|
|
|
|
|
92
|
$nlines += ($txt =~ s/\n/\n/g); |
230
|
|
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|
|
|
|
} |
231
|
55
|
100
|
|
|
|
202
|
if (defined $ivar) |
|
|
100
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
232
|
|
|
|
|
|
|
{ |
233
|
18
|
|
|
|
|
30
|
$perl_script .= "\n#line $nlines"; |
234
|
18
|
50
|
|
|
|
51
|
$perl_script .= " \"$filename\"" |
235
|
|
|
|
|
|
|
if defined $filename; |
236
|
18
|
|
|
|
|
20
|
$perl_script .= "\n"; |
237
|
|
|
|
|
|
|
|
238
|
18
|
|
100
|
|
|
53
|
$itype ||= ',xml'; |
239
|
18
|
|
|
|
|
43
|
$itype =~ s/^,//; |
240
|
18
|
|
|
|
|
30
|
$itype = lc($itype); |
241
|
18
|
|
|
|
|
152
|
$perl_script .= __make_interpolation($ivar, $itype); |
242
|
18
|
|
|
|
|
102
|
$nlines += ($ivar =~ s/\n/\n/g); |
243
|
|
|
|
|
|
|
} |
244
|
|
|
|
|
|
|
elsif (defined $include) |
245
|
|
|
|
|
|
|
{ |
246
|
1
|
|
|
|
|
2
|
my $ifile = $include; |
247
|
1
|
|
|
|
|
4
|
$ifile =~ s/\s+/\040/sg; |
248
|
1
|
|
|
|
|
5
|
$ifile =~ s/\s*$//; |
249
|
1
|
|
|
|
|
3
|
$ifile =~ s/^\s*//; |
250
|
1
|
|
|
|
|
5
|
my $ipath = __path_search($ifile, @inc); |
251
|
1
|
50
|
|
|
|
4
|
if (! $ipath) |
252
|
|
|
|
|
|
|
{ |
253
|
0
|
|
|
|
|
0
|
my $msg = "Can't locate \"$ifile\" in " |
254
|
|
|
|
|
|
|
. "include_path (include_path contains: " |
255
|
|
|
|
|
|
|
. join(" ", @inc) . ")"; |
256
|
0
|
|
|
|
|
0
|
carp $msg; |
257
|
|
|
|
|
|
|
} |
258
|
|
|
|
|
|
|
else |
259
|
|
|
|
|
|
|
{ |
260
|
1
|
|
|
|
|
2
|
my $ibuf; |
261
|
1
|
|
|
|
|
4
|
__slurp($ipath, \$ibuf); |
262
|
1
|
|
|
|
|
8
|
$perl_script .= template_to_perl |
263
|
|
|
|
|
|
|
($ibuf, $ipath, @inc); |
264
|
|
|
|
|
|
|
} |
265
|
1
|
|
|
|
|
7
|
$nlines += ($include =~ s/\n/\n/g); |
266
|
|
|
|
|
|
|
} |
267
|
|
|
|
|
|
|
elsif (defined $perl) |
268
|
|
|
|
|
|
|
{ |
269
|
|
|
|
|
|
|
# $perl =~ s/^\040//; |
270
|
20
|
|
|
|
|
39
|
$perl_script .= "\n#line $nlines"; |
271
|
20
|
50
|
|
|
|
56
|
$perl_script .= " \"$filename\"" |
272
|
|
|
|
|
|
|
if defined $filename; |
273
|
20
|
|
|
|
|
41
|
$perl_script .= "\n$perl\n"; |
274
|
20
|
|
|
|
|
170
|
$nlines += ($perl =~ s/\n/\n/g); |
275
|
|
|
|
|
|
|
} |
276
|
|
|
|
|
|
|
} |
277
|
10
|
|
|
|
|
33
|
return $perl_script; |
278
|
|
|
|
|
|
|
} |
279
|
|
|
|
|
|
|
|
280
|
|
|
|
|
|
|
1; |