This file is indexed.

/usr/share/perl5/Log/Contextual/WarnLogger.pm is in liblog-contextual-perl 0.007000-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
package Log::Contextual::WarnLogger;
$Log::Contextual::WarnLogger::VERSION = '0.007000';
# ABSTRACT: logger for libraries using Log::Contextual

use strict;
use warnings;

use Carp 'croak';

my @default_levels = qw( trace debug info warn error fatal );

# generate subs to handle the default levels
# anything else will have to be handled by AUTOLOAD at runtime
{
   for my $level (@default_levels) {

      no strict 'refs';

      my $is_name = "is_$level";
      *{$level} = sub {
         my $self = shift;

         $self->_log($level, @_)
           if $self->$is_name;
      };

      *{$is_name} = sub {
         my $self = shift;
         return 1 if $ENV{$self->{env_prefix} . '_' . uc $level};
         my $upto = $ENV{$self->{env_prefix} . '_UPTO'};
         return unless $upto;
         $upto = lc $upto;

         return $self->{level_num}{$level} >= $self->{level_num}{$upto};
      };
   }
}

our $AUTOLOAD;

sub AUTOLOAD {
   my $self = $_[0];

   (my $name = our $AUTOLOAD) =~ s/.*:://;
   return if $name eq 'DESTROY';

   # extract the log level from the sub name
   my ($is, $level) = $name =~ m/^(is_)?(.+)$/;
   my $is_name = "is_$level";

   no strict 'refs';
   *{$level} = sub {
      my $self = shift;

      $self->_log($level, @_)
        if $self->$is_name;
   };

   *{$is_name} = sub {
      my $self = shift;

      my $prefix_field = $self->{env_prefix} . '_' . uc $level;
      return 1 if $ENV{$prefix_field};

      # don't log if the variable specifically says not to
      return 0 if defined $ENV{$prefix_field} and not $ENV{$prefix_field};

      my $upto_field = $self->{env_prefix} . '_UPTO';
      my $upto       = $ENV{$upto_field};

      if ($upto) {
         $upto = lc $upto;

         croak "Unrecognized log level '$upto' in \$ENV{$upto_field}"
           if not defined $self->{level_num}{$upto};

         return $self->{level_num}{$level} >= $self->{level_num}{$upto};
      }

      # if we don't recognize this level and nothing says otherwise, log!
      return 1 if not $self->{custom_levels};
   };
   goto &$AUTOLOAD;
}

sub new {
   my ($class, $args) = @_;

   my $levels = $args->{levels};
   croak 'invalid levels specification: must be non-empty arrayref'
     if defined $levels and (ref $levels ne 'ARRAY' or !@$levels);

   my $custom_levels = defined $levels;
   $levels ||= [@default_levels];

   my %level_num;
   @level_num{@$levels} = (0 .. $#{$levels});

   my $self = bless {
      levels        => $levels,
      level_num     => \%level_num,
      custom_levels => $custom_levels,
   }, $class;

   $self->{env_prefix} = $args->{env_prefix}
     or die 'no env_prefix passed to Log::Contextual::WarnLogger->new';
   return $self;
}

sub _log {
   my $self    = shift;
   my $level   = shift;
   my $message = join("\n", @_);
   $message .= "\n" unless $message =~ /\n$/;
   warn "[$level] $message";
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

Log::Contextual::WarnLogger - logger for libraries using Log::Contextual

=head1 VERSION

version 0.007000

=head1 SYNOPSIS

 package My::Package;
 use Log::Contextual::WarnLogger;
 use Log::Contextual qw( :log ),
   -default_logger => Log::Contextual::WarnLogger->new({
      env_prefix => 'MY_PACKAGE',
      levels => [ qw(debug info notice warning error critical alert emergency) ],
   });

 # warns '[info] program started' if $ENV{MY_PACKAGE_TRACE} is set
 log_info { 'program started' }; # no-op because info is not in levels
 sub foo {
   # warns '[debug] entered foo' if $ENV{MY_PACKAGE_DEBUG} is set
   log_debug { 'entered foo' };
   ...
 }

=head1 DESCRIPTION

This module is a simple logger made for libraries using L<Log::Contextual>.  We
recommend the use of this logger as your default logger as it is simple and
useful for most users, yet users can use L<Log::Contextual/set_logger> to override
your choice of logger in their own code thanks to the way L<Log::Contextual>
works.

=head1 METHODS

=head2 new

Arguments: C<< Dict[ env_prefix => Str, levels => List ] $conf >>

 my $l = Log::Contextual::WarnLogger->new({ env_prefix => 'BAR' });

or:

 my $l = Log::Contextual::WarnLogger->new({
   env_prefix => 'BAR',
   levels => [ 'level1', 'level2' ],
 });

Creates a new logger object where C<env_prefix> defines what the prefix is for
the environment variables that will be checked for the log levels.

The log levels may be customized, but if not defined, these are used:

=over 4

=item trace

=item debug

=item info

=item warn

=item error

=item fatal

=back

For example, if C<env_prefix> is set to C<FREWS_PACKAGE> the following environment
variables will be used:

 FREWS_PACKAGE_UPTO

 FREWS_PACKAGE_TRACE
 FREWS_PACKAGE_DEBUG
 FREWS_PACKAGE_INFO
 FREWS_PACKAGE_WARN
 FREWS_PACKAGE_ERROR
 FREWS_PACKAGE_FATAL

Note that C<UPTO> is a convenience variable.  If you set
C<< FOO_UPTO=TRACE >> it will enable all log levels.  Similarly, if you
set it to C<FATAL> only fatal will be enabled.

=head2 $level

Arguments: C<@anything>

All of the following six methods work the same.  The basic pattern is:

 sub $level {
   my $self = shift;

   warn "[$level] " . join qq{\n}, @_;
      if $self->is_$level;
 }

=head3 trace

 $l->trace( 'entered method foo with args ' join q{,}, @args );

=head3 debug

 $l->debug( 'entered method foo' );

=head3 info

 $l->info( 'started process foo' );

=head3 warn

 $l->warn( 'possible misconfiguration at line 10' );

=head3 error

 $l->error( 'non-numeric user input!' );

=head3 fatal

 $l->fatal( '1 is never equal to 0!' );

If different levels are specified, appropriate functions named for your custom
levels work as you expect.

=head2 is_$level

All of the following six functions just return true if their respective
environment variable is enabled.

=head3 is_trace

 say 'tracing' if $l->is_trace;

=head3 is_debug

 say 'debuging' if $l->is_debug;

=head3 is_info

 say q{info'ing} if $l->is_info;

=head3 is_warn

 say 'warning' if $l->is_warn;

=head3 is_error

 say 'erroring' if $l->is_error;

=head3 is_fatal

 say q{fatal'ing} if $l->is_fatal;

If different levels are specified, appropriate is_$level functions work as you
would expect.

=head1 AUTHOR

Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2016 by Arthur Axel "fREW" Schmidt.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut