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package ExtUtils::InferConfig; |
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use strict; |
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use Config; |
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use Carp qw/croak/; |
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use IPC::Cmd qw//; |
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use vars qw/$VERSION/; |
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BEGIN { |
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$VERSION = '1.04'; |
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} |
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#use constant ISWIN32 => ($^O =~ /win32/i ? 1 : 0); |
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=head1 NAME |
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ExtUtils::InferConfig - Infer Perl Configuration for non-running interpreters |
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=head1 SYNOPSIS |
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use ExtUtils::InferConfig; |
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my $eic = ExtUtils::InferConfig->new( |
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perl => '/path/to/a/perl' |
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); |
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# Get that interpreters %Config as hash ref |
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my $Config = $eic->get_config; |
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29
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# Get that interpreters @INC as array ref |
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my $INC = $eic->get_inc; |
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=head1 DESCRIPTION |
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This module can determine the configuration and C<@INC> of a perl |
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interpreter given its path and that it is runnable by the current |
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user. |
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It runs the interpreter with a one-liner and grabs the C<%Config> |
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hash via STDOUT capturing. Getting the module load paths, C<@INC>, |
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works the same way for C<@INC> entries that are plain paths. |
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=head1 METHODS |
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44
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=head2 new |
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Requires one named parameter: C, the path to the perl |
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interpreter to query for information. |
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49
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Optional parameter: C 1> enables the debugging mode. |
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51
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=cut |
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53
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sub new { |
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2
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1
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1791
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my $class = shift; |
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2
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33
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19
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$class = ref($class) || $class; |
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57
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2
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8
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my %args = @_; |
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59
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60
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2
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87
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my $self = { |
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perl => undef, |
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config => undef, |
63
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inc => undef, |
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($args{debug} ? (debug => 1) : ()), |
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}; |
66
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2
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11
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bless $self => $class; |
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68
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# get interpreter, check that we have access |
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2
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33
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9
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my $perl = $args{perl} || $^X; |
70
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2
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8
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$perl = $self->_perl_to_file($perl); |
71
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72
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2
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50
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9
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if (not defined $perl) { |
73
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0
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0
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croak( |
74
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"Invalid perl interpreter specified. " |
75
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."It was either not found or it is not executable." |
76
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); |
77
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} |
78
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79
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2
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50
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17
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warn "Using perl '$perl'" if $self->{debug}; |
80
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81
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2
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5
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$self->{perl} = $perl; |
82
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83
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2
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8
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return $self; |
84
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} |
85
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86
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sub _perl_to_file { |
87
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# see perldoc perlvar about this. Look for $^X |
88
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2
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2
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3
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my $self = shift; |
89
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2
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5
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my $perl = shift; |
90
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91
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2
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50
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13
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return() if not defined $perl; |
92
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2
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50
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33
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137
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return $perl if -f $perl and -x _; |
93
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94
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# Build up a set of file names (not command names). |
95
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0
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0
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0
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if ($^O ne 'VMS') { |
96
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0
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0
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0
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$perl .= $Config{_exe} |
97
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unless $perl =~ m/\Q$Config{_exe}$/i; |
98
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} |
99
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100
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0
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0
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0
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0
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return $perl if -f $perl and -x _; |
101
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0
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0
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return(); |
102
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} |
103
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104
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105
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=head2 get_config |
106
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107
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Returns a copy of the C<%Config::Config> hash of the |
108
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intepreter which was specified as a parameter to the |
109
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constructor. |
110
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111
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The first time this method (or the get_inc method below) |
112
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is called, the perl binary is run. For subsequent calls |
113
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of this method, the information is cached. |
114
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115
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=cut |
116
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117
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sub get_config { |
118
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1
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1
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1
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498
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my $self = shift; |
119
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1
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50
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4
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return $self->{config} if defined $self->{config}; |
120
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121
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1
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3
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$self->{config} = $self->_infer_config($self->{perl}); |
122
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123
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1
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10
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return $self->{config}; |
124
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} |
125
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126
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sub _infer_config { |
127
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1
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1
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1
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my $self = shift; |
128
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1
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2
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my $perl = shift; |
129
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1
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1
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my $code = <<'HERE'; |
130
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use Config; |
131
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foreach my $k (keys %Config) { |
132
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my $ek = $k; |
133
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$ek =~ s/([\n\t\r%])/q{%}.ord($1).q{;}/ge; |
134
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my $ev = $Config{$k}; |
135
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if (defined $ev) { |
136
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$ev =~ s/([\n\t\r%])/q{%}.ord($1).q{;}/ge; |
137
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} else { |
138
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$ev = q{%-1;}; |
139
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} |
140
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print qq{$ek\n$ev\n}; |
141
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} |
142
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HERE |
143
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144
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1
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50
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4
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warn "Running the following code:\n---$code\n---" if $self->{debug}; |
145
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146
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1
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10
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$code =~ s/\s+$//; |
147
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1
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6
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$code =~ s/\n/ /g; |
148
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149
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1
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3
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my @command = ( |
150
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$perl, '-e', $code |
151
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); |
152
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1
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50
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3
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warn "Running the following command: '@command'" if $self->{debug}; |
153
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154
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1
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2
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my $old_use_run = $IPC::Cmd::USE_IPC_RUN; |
155
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1
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2
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$IPC::Cmd::USE_IPC_RUN = 1; |
156
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1
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4
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my ($success, $error_code, undef, $buffer, $error) = IPC::Cmd::run( |
157
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command => \@command, |
158
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); |
159
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1
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171713
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$IPC::Cmd::USE_IPC_RUN = $old_use_run; |
160
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161
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162
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1
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50
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18
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warn "Returned buffer is:\n---\n".join("\n",@$buffer)."\n---" if $self->{debug}; |
163
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1
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50
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14
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warn "Returned error buffer is:\n---\n".join("\n",@$error)."\n---" if $self->{debug}; |
164
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165
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1
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50
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8
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if (not $success) { |
166
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0
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0
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croak( |
167
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"Could not run the specified perl interpreter to determine \%Config. Error code (if any) was: $error_code. STDERR was (if any): ".join('', @$error) |
168
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); |
169
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} |
170
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171
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1
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2
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my %Config; |
172
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1
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1051
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my @data = split /\n/, join '', @$buffer; |
173
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1
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69
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while (@data) { |
174
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1119
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1709
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my $key = shift(@data); |
175
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1119
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1214
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chomp $key; |
176
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1119
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2684
|
my $value = shift(@data); |
177
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1119
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100
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2187
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$value = '' if !defined $value; #in case of last value |
178
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1119
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1069
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chomp $value; |
179
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1119
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5265
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$key =~ s/%(\d+);/chr($1)/eg; |
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0
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0
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180
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1119
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100
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1713
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if ($value eq '%-1;') { |
181
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198
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212
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$value = undef; |
182
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} |
183
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else { |
184
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921
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1045
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$value =~ s/%(\d+);/chr($1)/eg; |
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0
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0
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185
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} |
186
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1119
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3879
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$Config{$key} = $value; |
187
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} |
188
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189
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1
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15
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return \%Config; |
190
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} |
191
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192
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193
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=head2 get_inc |
194
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195
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Returns a copy of the C<@INC> array of the |
196
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intepreter which was specified as a parameter to the |
197
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constructor. B This skips any references |
198
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(subroutines, C refs, objects) in the C<@INC> |
199
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array because they cannot be reliably stringified! |
200
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201
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The first time this method (or the get_config method avove) |
202
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is called, the perl binary is run. For subsequent calls |
203
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of this method, the information is cached. |
204
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205
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=cut |
206
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207
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|
|
sub get_inc { |
208
|
1
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|
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1
|
1
|
512
|
my $self = shift; |
209
|
1
|
50
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6
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return $self->{config} if defined $self->{inc}; |
210
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|
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211
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1
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3
|
$self->{inc} = $self->_infer_inc($self->{perl}); |
212
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213
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1
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68
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return $self->{inc}; |
214
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} |
215
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216
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217
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sub _infer_inc { |
218
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1
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|
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1
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|
3
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my $self = shift; |
219
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1
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|
|
|
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1
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my $perl = shift; |
220
|
1
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|
|
|
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2
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my $code = <<'HERE'; |
221
|
|
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|
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|
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foreach my $inc (@INC) { |
222
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|
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|
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my $i = $inc; |
223
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|
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|
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|
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if (not ref($i)) { |
224
|
|
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|
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$i =~ s/([\n\t\r%])/q{%}.ord($1).q{;}/ge; |
225
|
|
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|
|
|
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} |
226
|
|
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|
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|
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print qq{$i\n}; |
227
|
|
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|
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} |
228
|
|
|
|
|
|
|
HERE |
229
|
1
|
50
|
|
|
|
5
|
warn "Running the following code:\n---$code\n---" if $self->{debug}; |
230
|
|
|
|
|
|
|
|
231
|
1
|
|
|
|
|
9
|
$code =~ s/\s+$//; |
232
|
1
|
|
|
|
|
7
|
$code =~ s/\n/ /g; |
233
|
|
|
|
|
|
|
|
234
|
1
|
|
|
|
|
3
|
my @command = ( |
235
|
|
|
|
|
|
|
$perl, '-e', $code |
236
|
|
|
|
|
|
|
); |
237
|
1
|
50
|
|
|
|
3
|
warn "Running the following command: '@command'" if $self->{debug}; |
238
|
|
|
|
|
|
|
|
239
|
1
|
|
|
|
|
2
|
my $old_use_run = $IPC::Cmd::USE_IPC_RUN; |
240
|
1
|
|
|
|
|
2
|
$IPC::Cmd::USE_IPC_RUN = 1; |
241
|
1
|
|
|
|
|
5
|
my ($success, $error_code, undef, $buffer, $error) = IPC::Cmd::run( |
242
|
|
|
|
|
|
|
command => \@command, |
243
|
|
|
|
|
|
|
); |
244
|
1
|
|
|
|
|
116547
|
$IPC::Cmd::USE_IPC_RUN = $old_use_run; |
245
|
|
|
|
|
|
|
|
246
|
1
|
50
|
|
|
|
15
|
warn "Returned buffer is:\n---\n".join("\n",@$buffer)."\n---" if $self->{debug}; |
247
|
1
|
50
|
|
|
|
10
|
warn "Returned error buffer is:\n---\n".join("\n",@$error)."\n---" if $self->{debug}; |
248
|
|
|
|
|
|
|
|
249
|
1
|
50
|
|
|
|
10
|
if (not $success) { |
250
|
0
|
|
|
|
|
0
|
croak( |
251
|
|
|
|
|
|
|
"Could not run the specified perl interpreter to determine \@INC. Error code (if any) was: $error_code. STDERR was (if any): ".join('', @$error) |
252
|
|
|
|
|
|
|
); |
253
|
|
|
|
|
|
|
} |
254
|
|
|
|
|
|
|
|
255
|
1
|
|
|
|
|
5
|
my @inc; |
256
|
1
|
|
|
|
|
15
|
my @data = split /\n/, join '', @$buffer; |
257
|
1
|
|
|
|
|
6
|
foreach my $line (@data) { |
258
|
7
|
|
|
|
|
21
|
chomp $line; |
259
|
7
|
50
|
|
|
|
20
|
if ($line eq '%-1;') { |
260
|
0
|
|
|
|
|
0
|
$line = undef; |
261
|
|
|
|
|
|
|
} |
262
|
|
|
|
|
|
|
else { |
263
|
7
|
|
|
|
|
16
|
$line =~ s/%(\d+);/chr($1)/eg; |
|
0
|
|
|
|
|
0
|
|
264
|
|
|
|
|
|
|
} |
265
|
7
|
|
|
|
|
40
|
push @inc, $line; |
266
|
|
|
|
|
|
|
} |
267
|
|
|
|
|
|
|
|
268
|
1
|
|
|
|
|
10
|
return \@inc; |
269
|
|
|
|
|
|
|
} |
270
|
|
|
|
|
|
|
|
271
|
|
|
|
|
|
|
|
272
|
|
|
|
|
|
|
1; |
273
|
|
|
|
|
|
|
__END__ |