How can I check out a github repo from Heroku?

Question

I would like to be able to log the number of words in certain files in a Github repo whenever there is a new push to the repo. I have set up a hook on Github to hit a Django Heroku app url after each push, but I don't know how to run a git pull in python from a Django app running on Heroku. Is it possible to write to the local file system in Heroku?

Answer 1

Check out github repo from Heroku?

from the command line you can pull from heroku easily: git pull heroku master

have set up a hook on Github to hit a Django Heroku app url after each push, but I don't know how to run a git pull in python from a Django app running on Heroku?

Is it a different heroku App (from the one that was deployed) that will be doing the pull?

• Yes? then you are going to have issues. Because the pull app needs permission (heroku login) to pull... and it wont have it. Also, b/c of the ephemeral filesystem, even if you login (via heroku run bash or the like) to it, the pull app will eventually lose its logged in session (see why below)
• No? then don't pull. just use the os filesystem libraries to look into the application directory...

Is it even possible to write to the local file system in Heroku?

Yes and No. You can write to the local filesystem, but its going to get nuked. See: https://devcenter.heroku.com/articles/dynos#ephemeral-filesystem

Also, with the EFS, each dyno is going to have a different EFS - so each web process is in a way sandboxed.