Git Excited – Task: Versioning – Task: Experimenting

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Git Excited – Task: Versioning – Task: Experimenting

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git-pres

Git/GitHub presentation for LASA's Web Apps course

On Github cerivera / git-pres

Git Excited

Created by Carlos Rivera

A World Without Git

Task: Backing up code

Problems?

Task: Versioning

v0.1, v0.5, v2.0, ...

Naming

  • helloworld.py
  • helloworld-2.py
  • helloworld-FINAL.py
  • helloworld-REAL-FINAL.py

Comment Blocks

class List():
    def append():
        ...
    def delete():
        ...
# class List():
#     def append():
#         ...
#     def delete():
#         ...
# class List():
#     def append():
#         ...
#     def delete():
#         ...
class BetterList():
    def append():
        ...
    def delete()
        ...

Stale Files

Keeping obsolete files around

Task: Experimenting

Steps:

(without breaking existing app!)

  • Make copy of app directory
  • Make your changes
  • Deploy new app to test
  • Toss it or manually merge into original directory (not fun!)

Task: Collaboration

What if you want to work on same file?

Same function?

Git to the rescue

Overview

  • Git manages versions of your files/code
  • Keeps track of changes throughout the life of a project
  • commits are used to create snapshots of your project
  • View what your codebase looked like at time of a commit
  • Easy to undo changes. Hard to break stuff after a commit
  • Easy to clone your project for experimenting (branches)
  • Easily merge different versions of a file

Basic Workflow

  • Set up directory with git
  • Make some changes to files
  • Looks good? commit. Otherwise, easy to undo all changes.

(This is all happening on your local computer)

Git Server

  • Setup the same repo on a remote computer
  • Not required, but very helpful
  • Like DropBox, but only syncs to the cloud when you tell it
  • After you're done with commits, you need to push your changes to the specific server
  • Other developers can access that server to use or contribute to your project
  • After new commits are pushed to server, everyone else needs to pull those changes
  • A Git server already setup for you
  • Community of developers
  • Have official desktop application to make Git easier
  • Research or contribute to other projects
  • Online resume/portfolio for developers
  • Free!

Big Projects on GitHub

Class Project

  • Find the ChatterBox project by LasaComputerScience user on GitHub
  • Claim an issue in the Issues tab
  • Fork the project (create a clone of the project under your account)
  • clone the project on your computer.
  • Run app locally using App Engine (don't need to deploy it)
  • Fix your issue
  • Commit it (with comment!). Then push changes to GitHub (Sync)
  • Create pull request in GitHub
  • After accepted, go to your GitHub profile to view list of contributed projects

Get more help at help.github.com