daemontools is not available on fedora

[asmodehn]

daemontools https://cr.yp.to/daemontools.html is not available as a package on fedora.

Therefore we cannot release catkin_pip 0.2 just yet, since we are using setlock from daemontools to prevent concurrent run of pip (which is not protected, see : pypa/pip#2361)

We should implement a shell only version of setlock, and use it as a catkin_pip script, like path_prepend.sh. A starting point for implementation can be found there : http://wordpress.barrycarter.org/index.php/2010/04/25/whats-the-fedora-11-equivalent-of-setlock-2/#.WMoEukclH0o

[asmodehn]

@yotabits FYI

[asmodehn]

This has been solved by using flock from utils-linux instead of setlock from daemontools.