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Path::IsDev - Determine if a given Path resembles a development source tree


version 0.2.1


use Path::IsDev qw(is_dev);

if( is_dev('/some/path') ) {
} else {


This module is more or less a bunch of heuristics for determining if a given path is a development tree root of some kind.

This has many useful applications, notably ones that require behaviours for "installed" modules to be different to those that are still "in development"



Debug callback.

To enable debugging:



Using an import'ed is_dev:

if( is_dev( $path ) ) {


Though the actual heuristics used will be based on how import was called.

Additionally, you can call


without importing anything, and it will behave exactly the same as if you'd imported it using

use Path::IsDev qw( is_dev );

That is, no set specification is applicable, so you'll only get the "default".


Custom Sets

Path::IsDev has a system of "sets" of Heuristics, in order to allow for pluggable and flexible heuristic types.

Though, for the vast majority of cases, this is not required.

use Path::IsDev is_dev => { set => 'Basic' };
use Path::IsDev is_dev => { set => 'SomeOtherSet' , -as => 'is_dev_other' };

Overriding the default set

If for whatever reason the Basic set is insufficient, or if it false positives on your system for some reason, the "default" set can be overridden.

export PATH_ISDEV_DEFAULT_SET="SomeOtherSet"

use Path::IsDev qw( is_dev );
is_dev('/some/path') # uses SomeOtherSet

Though this will only take priority in the event the set is not specified during import

If this poses a security concern for the user, then this security hole can be eliminated by declaring the set you want in code:

export PATH_ISDEV_DEFAULT_SET="SomeOtherSet"

use Path::IsDev  is_dev => { set => 'Basic' };
is_dev('/some/path') # uses Basic, regardless of ENV


Its conceivable, than an evil user could construct an evil set, containing arbitrary and vulnerable code, and possibly stash that evil set in a poorly secured privileged users @INC

And if they managed to achieve that, if they could poison the privileged users %ENV, they could trick the privileged user into executing arbitrary code.

Though granted, if you can do either of those 2 things, you're probably security vulnerable anyway, and granted, if you could do either of those 2 things you could do much more evil things by the following:

export PERL5OPT="-MEvil::Module"

So with that in understanding, saying this modules default utility is "insecure" is mostly a bogus argument.

And to that effect, this module does nothing to "lock down" that mechanism, and this module encourages you to NOT force a set, unless you NEED to, and strongly suggests that forcing a set for the purpose of security will achieve no real improvement in security, while simultaneously reducing utility.

{ "namespace":"Path::IsDev", "interface":"exporter" }


Kent Fredric


This software is copyright (c) 2013 by Kent Fredric

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

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