Sprinter Internals

This page discusses the internals of a sprinter environment. Specifically, the building blocks that constitute a sprinter environment.

Environment activation/deactivation

The main tool that environments are activated and deactivated is through “injections” of text into various configuration files on a client machine. A common injections that occurs is injecting the .rc file for an environment into a .bashrc/.bash_profile like so:

inject environment

Injections can be performed on any set of files that exist with an environment. An example of common ones are:

  • the .ssh/config file
  • .pypirc for local repositories
  • .vimrc for vim configuration
  • .emacs for emacs configuration

And more! Any file can have configuration injected, which should be removed in the activate/deactivate step.

The .rc file

Every sprinter environment has a .rc file at it’s core. Identical in concept to a .bashrc or .bash_profile, this .rc file contains a majority of the configuration of the setup for an environment.

The .sprinter-ENVIRONMENT directory

A majority of the files required for a sprinter environment are stored in a .sprinter-ENVIRONMENT directory within


Each section in a sprinter configuration represents a “feature”, which exists in a particular state. Each service is dealt with separately, and is designed a service directory within the configuration root that it can use to place whatever it would like (clone a git repository, unpack a package, etc).