GIT Introduction

Two Git groups: David and Nazario

Git for beginners with Nazario

Assuming some use of Git and starting at the bottom level.

Resources

• Video "Git for 4-year-olds"
• Article "Understanding Git conceptually"
• Practice: Git is source control; off-line; keeping track of changes;

Locally On Your Computer

Git as software tool installed on your computer.

• There are graphical tools as well as command line.
• Starting with cmd line...
  • Creating folder and file in folder -- then turn into a repository using "git init"
  • Start locally. Type "git status"
  • On branch master
  • see untracked file, To add to repository, "git add -A"
    • "add" is not the same as "commit" it is an intermediate step (like adding to shopping cart but not yet committing to buying)
    • "-A" means all additions, changes and deletions.
    • git commit -m with "message for the commit"
  • git show
  • git diff -- filename.txt
    • will show the difference between the earlier committed file and the modified (saved) file (labeled a and b).
  • Committed files reside in a "secret" folder (.git)
    • Must Add before Commit (must be in shopping cart before purchase!)
    • Commit is a cohesive collection of Adds that all relate to each other.
  • binaries (pdf, png, etc.)
  • Empty folders are ignored, git only cares about files.
  • If you want a folder to be in hte Commit create an empty file called .gitkeep (by convention)
  • Use touch command to create empty file with leading dot
  • git log
  • shows log of all changes; every Commit has a unique number
  • HEAD
    • Copy the Commit number and type
    • git checkout number
    • "you are in detached HEAD"
    • HEAD is your time machine; checkout a commit will take you back in time, and git log will show you only changes made up to this point in time.
    • To get back to the present time type
    • git checkout master (master is the name of the branch you are in)