Per-user mock build chroot

gistfile1.txt

# Add this code to your /etc/mock/site-defaults.cfg file, and then
# all of your mock builds will take place in ${HOME}/.mockbuild/CONFIG.

# This will allow many users to build the same package config (-r)
# at any given time; so john, tom, dick and harry can build epel-5-noarch
# at the same time, and john can build epel-5-noarch, epel-6-x86_64,
# and fedora-13-x86_64 at the same time, because they all have their own
# build basedir.

# Note that this is very linux specific, YMMV on other platforms.

import pwd
import os
sudouser=os.environ.get('SUDO_USER', '')
if sudouser:
    homedir=pwd.getpwnam(sudouser).pw_dir
else:
    homedir=pwd.getpwuid(os.getuid()).pw_dir
mockdir=os.path.join(homedir, ".mockbuild")
config_opts['basedir']=os.path.abspath(mockdir)

Also, the sudo checking is because mock performs privilege escalation, so by the time this code is being executed, python already thinks we're root, so we have to backtrack and find who we really are.