In order to radically simplify how we prepare the service
venvs, we use a common role to do the wheel builds and the
venv preparation. This makes the process far simpler to
understand, because the role does its own building and
installing. It also reduces the code maintenance burden,
because instead of duplicating the build processes in the
repo_build role and the service role - we only have it all
done in a single place.
We also change the role venv tag var to use the integrated
build's common venv tag so that we can remove the role's
venv tag in group_vars in the integrated build. This reduces
memory consumption and also reduces the duplication.
This is by no means the final stop in the simplification
process, but it is a step forward. The will be work to follow
which:
1. Replaces 'developer mode' with an equivalent mechanism
that uses the common role and is simpler to understand.
We will also simplify the provisioning of pip install
arguments when doing this.
2. Simplifies the installation of optional pip packages.
Right now it's more complicated than it needs to be due
to us needing to keep the py_pkgs plugin working in the
integrated build.
Depends-On: https://review.openstack.org/598957
Change-Id: I2eba8e7ca3f66169094264f31f3e182287dfa9b2
Implements: blueprint python-build-install-simplification
Signed-off-by: Jesse Pretorius <jesse.pretorius@rackspace.co.uk>
Consolidate distro package install tasks into a
single task using the package module and pass
the package list into the name instead of using
a with_items loop.
The minimum Ansible version is raised to 2.2 due to a
known bug [1] in Ansible's apt module which does not
update the cache properly if the cache update and the
install are combined in a single task.
[1] https://github.com/ansible/ansible-modules-core/issues/1497
Also:
- split install tasks into pre-install, install and
post-install tasks and tag them appropriately.
Change-Id: I0c5cc16ba1d82b7fd169156d1890c86614210cad
Guilherme Steinmüller