perl-Devel-Hide - Forces the unavailability of specified Perl modules (for testing)
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Given a list of Perl modules/filenames, this module makes 'require' and
'use' statements fail (no matter the specified files/modules are installed
They _die_ with a message like:
Can't locate Module/ToHide.pm (hidden)
The original intent of this module is to allow Perl developers to test for
alternative behavior when some modules are not available. In a Perl
installation, where many modules are already installed, there is a chance
to screw things up because you take for granted things that may not be
there in other machines.
For example, to test if your distribution does the right thing when a
module is missing, you can do
perl -MDevel::Hide=Test::Pod Makefile.PL
forcing 'Test::Pod' to not be found (whether it is installed or not).
Another use case is to force a module which can choose between two
requisites to use the one which is not the default. For example,
'XML::Simple' needs a parser module and may use 'XML::Parser' or 'XML::SAX'
(preferring the latter). If you have both of them installed, it will always
try 'XML::SAX'. But you can say:
perl -MDevel::Hide=XML::SAX script_which_uses_xml_simple.pl
NOTE. This module does not use the Carp manpage. As said before, denial
This module is pretty trivial. It uses a code reference in @INC to get rid
of specific modules during require - denying they can be successfully
loaded and stopping the search before they have a chance to be found.
There are three alternative ways to include modules in the hidden list:
environment variable DEVEL_HIDE_PM
Optionally, you can propagate the list of hidden modules to your process'
child processes, by passing '-from:children' as the first option when you
use() this module. This works by populating 'PERL5OPT', and is incompatible
with Taint mode, as explained in the perlrun manpage.
Install perl-Devel-Hide rpm package:
# zypper install perl-Devel-Hide