Installation permissions issue `$dir.config`

[daithi-coombes]

Hi,

I'm trying to install pyrus on a Debian Wheezy vagrant box, my php version is 5.4.39-0+deb7u1 (cli). Also I have downloaded the latest phar to /opt which has permission as normal user, vagrant in this case. No matter what I try pyrus is trying to create a .config directory from the parent dir that is chosen. ie if I choose /home/vagrant as the default dir, pyrus will try to create /home/vagrant.config

To reproduce:

/opt$ php --version
PHP 5.4.39-0+deb7u1 (cli) (built: Mar 20 2015 15:16:28) 
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies

vagrant@vagrant-debian-wheezy64:/opt$ php pyrus.phar install pear/PHP_CodeSniffer
Pyrus version 2.0.0a4 SHA-1: 72271D92C3AA1FA96DF9606CD538868544609A52
Pyrus: No user configuration file detected
It appears you have not used Pyrus before, welcome!  Initialize install?
Please choose:
  yes
  no
[yes] : 
Great.  We will store your configuration in:
  /home/vagrant/.pear/pearconfig.xml
Where would you like to install packages by default?
[/opt] : 
You have chosen:
/opt
Pyrus\Config\Exception: Cannot save configuration, no filesystem permissions to modify PEAR directory /opt.config
vagrant@vagrant-debian-wheezy64:/opt$

Seems to me that pyrus might be getting a null value from somewhere instead of a directory seperator? The only similar issue I could find was from 2010 - so this might not be bug, as such, and might be my server setup?