This file is indexed.

/usr/share/perl5/Stow/Util.pm is in stow 2.2.0-2.

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
package Stow::Util;

=head1 NAME

Stow::Util - general utilities

=head1 SYNOPSIS

    use Stow::Util qw(debug set_debug_level error ...);

=head1 DESCRIPTION

Supporting utility routines for L<Stow>.

=cut

use strict;
use warnings;

use POSIX qw(getcwd);

use base qw(Exporter);
our @EXPORT_OK = qw(
    error debug set_debug_level set_test_mode
    join_paths parent canon_path restore_cwd
);

our $ProgramName = 'stow';

#############################################################################
#
# General Utilities: nothing stow specific here.
#
#############################################################################

=head1 IMPORTABLE SUBROUTINES

=head2 error($format, @args)

Outputs an error message in a consistent form and then dies.

=cut

sub error {
    my ($format, @args) = @_;
    die "$ProgramName: ERROR: " . sprintf($format, @args) . " ($!)\n";
}

=head2 set_debug_level($level)

Sets verbosity level for C<debug()>.

=cut

our $debug_level = 0;

sub set_debug_level {
    my ($level) = @_;
    $debug_level = $level;
}

=head2 set_test_mode($on_or_off)

Sets testmode on or off.

=cut

our $test_mode = 0;

sub set_test_mode {
    my ($on_or_off) = @_;
    if ($on_or_off) {
        $test_mode = 1;
    }
    else {
        $test_mode = 0;
    }
}

=head2 debug($level, $msg)

Logs to STDERR based on C<$debug_level> setting.  C<$level> is the
minimum verbosity level required to output C<$msg>.  All output is to
STDERR to preserve backward compatibility, except for in test mode,
when STDOUT is used instead.  In test mode, the verbosity can be
overridden via the C<TEST_VERBOSE> environment variable.

Verbosity rules:

=over 4

=item    0: errors only

=item >= 1: print operations: LINK/UNLINK/MKDIR/RMDIR/MV

=item >= 2: print operation exceptions

e.g. "_this_ already points to _that_", skipping, deferring,
overriding, fixing invalid links

=item >= 3: print trace detail: trace: stow/unstow/package/contents/node

=item >= 4: debug helper routines

=item >= 5: debug ignore lists

=back

=cut

sub debug {
    my ($level, $msg) = @_;
    if ($debug_level >= $level) {
        if ($test_mode) {
            print "# $msg\n";
        }
        else {
            warn "$msg\n";
        }
    }
}

#===== METHOD ===============================================================
# Name      : join_paths()
# Purpose   : concatenates given paths
# Parameters: path1, path2, ... => paths
# Returns   : concatenation of given paths
# Throws    : n/a
# Comments  : factors out redundant path elements:
#           : '//' => '/' and 'a/b/../c' => 'a/c'
#============================================================================
sub join_paths {
    my @paths = @_;

    # weed out empty components and concatenate
    my $result = join '/', grep {! /\A\z/} @paths;

    # factor out back references and remove redundant /'s)
    my @result = ();
    PART:
    for my $part (split m{/+}, $result) {
        next PART if $part eq '.';
        if (@result && $part eq '..' && $result[-1] ne '..') {
            pop @result;
        }
        else {
            push @result, $part;
        }
    }

    return join '/', @result;
}

#===== METHOD ===============================================================
# Name      : parent
# Purpose   : find the parent of the given path
# Parameters: @path => components of the path
# Returns   : returns a path string
# Throws    : n/a
# Comments  : allows you to send multiple chunks of the path
#           : (this feature is currently not used)
#============================================================================
sub parent {
    my @path = @_;
    my $path = join '/', @_;
    my @elts = split m{/+}, $path;
    pop @elts;
    return join '/', @elts; 
}

#===== METHOD ===============================================================
# Name      : canon_path
# Purpose   : find absolute canonical path of given path
# Parameters: $path
# Returns   : absolute canonical path
# Throws    : n/a
# Comments  : is this significantly different from File::Spec->rel2abs?
#============================================================================
sub canon_path {
    my ($path) = @_;

    my $cwd = getcwd();
    chdir($path) or error("canon_path: cannot chdir to $path from $cwd");
    my $canon_path = getcwd();
    restore_cwd($cwd);

    return $canon_path;
}

sub restore_cwd {
    my ($prev) = @_;
    chdir($prev) or error("Your current directory $prev seems to have vanished");
}

=head1 BUGS

=head1 SEE ALSO

=cut

1;

# Local variables:
# mode: perl
# cperl-indent-level: 4
# end:
# vim: ft=perl