addrevision: rename 'd' to 'delta'
That variable is quite central to the whole function. Giving it a more explicit
name help with code readability.
FROM fedora:21
RUN yum install -y gcc
RUN yum install -y python-devel python-docutils
RUN yum install -y make
RUN yum install -y rpm-build
RUN yum install -y gettext
# For creating repo meta data
RUN yum install -y createrepo