Version as an environment variable

Description

Right now the version of the project is defined explicitly here: https://github.com/pydanny/cookiecutter-django/blob/master/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/__init__.py

Rationale

It is possible that I am missing the purpose of the __version__ variable, but it would fit the current structure of the project, if this value was set as an environment variable.

What are your thoughts on this?

[luzfcb]

@demestav maybe something like this in your config/settings/base.py

from subprocess import check_output

def get_current_git_tag():
     current_commit_short_hash = check_output("git log -n1 --pretty='%h'".split()).decode().replace("\n", "").replace("'", "")
     return check_output(f"git describe --exact-match --tags {current_commit_short_hash}".split()).decode().replace("\n", "").replace("'", "")

CURRENT_GIT_TAG = get_current_git_tag()

[demestav]

@luzfcb Thank you for the insightful information! Indeed what you describe is what I want to achieve. How would you go and define the version variable to the git tag? This is where I thought the environment variable fits in; it is set before the application starts to the appropriate value which is then injected in the Django application.