git: detect existing symlink hooks before overwriting - only update plain files If the existing hook is a symlink, the hook is not what we put in place, and we should stay away - no matter if it points at something that looks like a Kallithea hook.

[tox]
minversion = 1.8
envlist = py27-pytest

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    -r{toxinidir}/dev_requirements.txt
    python-ldap
    python-pam
commands =
    pytest: py.test {posargs}