/usr/share/perl5/Petal/Functions.pm is in libpetal-perl 2.23-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Petal::Functions - Helper functions for the Petal.pm wrapper
# ------------------------------------------------------------------
# Author: Jean-Michel Hiver
# Description: This class parses a template in 'canonical syntax'
# (referred as the 'UGLY SYNTAX' in the manual) and generates Perl
# code that can be turned into a subroutine using eval().
# ------------------------------------------------------------------
package Petal::Functions;
use strict;
use warnings;
# find_filepath ($filename, @paths);
# ----------------------------------
# Finds the filepath for $filename in @paths
# and returns it.
sub find_filepath
{
my $filename = shift;
for (@_)
{
s/\/$//;
return $_ if (-e "$_/$filename");
}
}
# find_filename ($language, @paths);
# ----------------------------------
# Finds the filename for $language in @paths.
# For example, if $language is 'fr-CA' it might return
#
# fr-CA.html
# fr-CA.xml
# fr.html
# en.html
sub find_filename
{
my $lang = shift;
my @paths = @_;
while (defined $lang)
{
foreach my $path (@paths)
{
my $filename = exists_filename ($lang, $path);
defined $filename and return $filename;
}
$lang = parent_language ($lang);
}
return;
}
# parent_language ($lang);
# ------------------------
# Returns the parent language for $lang, i.e.
# 'fr-CA' => 'fr' => $Petal::LANGUAGE => undef.
#
# $DEFAULT is set to 'en' by default but that can be changed, e.g.
# local $Petal::LANGUAGE = 'fr' for example
sub parent_language
{
my $lang = shift;
$lang =~ /-/ and do {
($lang) = $lang =~ /^(.*)\-/;
return $lang;
};
$lang eq $Petal::LANGUAGE and return;
return $Petal::LANGUAGE;
}
# exists_filename ($language, $path);
# -----------------------------------
# looks for a file that matches $langage.<extension> in $path
# if the file is found, returns the filename WITH its extension.
#
# example:
#
# # $filename will be either 'en-US.html, en-US.xml, ... or 'undef'.
# my $filename = exists_filename ('en-US', './scratch');
sub exists_filename
{
my $language = shift;
my $path = shift;
return (map { s{\Q$path\E/?}{}; $_ } <$path/$language.*>)[0];
}
1;
__END__
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