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Good git for the UCB-HBGD team

The purpose of this document is to provide support for the use of version control (a lá git) in our data analysis and software development efforts. In order to effectively use the git repository available to us via the HBGDki collaboration, we will reserve that repository for (cleaned/curated) data sets that will be used in our analysis and demonstration code. Rather than using the GHAP git server to version code we produce, we will generate and use repos under the HBGD-UCB GitHub Organization. Since we expect all analysis code to rely on the data sets stored in the private GHAP git repo, there is no need for our analysis code to be held in private repositories (it ought to be useless to those unaffiliated with our work).

The HBGDki git repo is available for cloning (when on a GHAP session) via

# ssh user.name@IP
# enter password
git clone https://user.name@git.ghap.io/stash/scm/hbgd-teams/UCB-SuperLearner.git

N.B., the GHAP data repo may only be cloned when logged in to a session associated with the GHAP system.

Any given git repo associated with the software development and data analysis efforts may easily be cloned from the HBGD-UCB organization. For example, to clone this repository, try:

git clone git@github.com:HBGD-UCB/good-git.git

Unlike the repo on the GHAP git server, all repos affiliated with our GitHub organization ought to be clone-able from any system (provided your GitHub credentials are set up properly) -- this means they ought to be accessible when logged in to a GHAP session or on your local machine.

"Good Enough" Practices

  • When developing code (for data analysis or the software products), work on a new branch that is aptly named with respect to the functionality you hope to add with your work. Commit often, and once you've completed your work, generate a pull request to the master or develop branch of the target repo as appropriate.
  • We will be using the "git flow" branching model. This will help keep us on the same page about how and when to create branches as well as how to merge new additions to existing long-lasting branches (e.g., develop).

BAD Practices

The most common bad practice in using git is to store your version controlled repos in a system that provides automatic backups (e.g., Dropbox). DON'T DO THIS -- especially for repos on which you expect collaborators to contribute. Why? Well, git works by storing snapshots (of the changes in a given plain-text file between commits) while Dropbox makes near-constant backups. This has the potential to lead to a conflicting HEAD, a problem that no one wants to resolve.

tl;dr -- please, please don't use Dropbox with the git repos.

Resources

Here are a few useful notes and readings that may be useful in remedying any problems that may arise when working with git. These range the spectrum from applied to fairly technical: