git-basics

Take you through an everyday git workflow

Need help at anytime?
http://git-scm.com/book/

 man git
 git help
 man git-<verb> #eg man git-bisect

First Time Setup

Set your user name and email address. Necessary for commits

 git config --global user.name "Rusty Taco"
 git config --global user.email rustytaco@yolo.com

Import A New Project

 git clone git@github.com:amasare/git-basics.git

Make Changes

Modify existing file "donkey.txt"
Create 3 new files "playArea1.txt", "playArea2.txt", "playArea3.txt"
Stage files
Modify existing file "donkey.txt" again
Notice staged and unstaged state when you run a git status.

 git status
 git status -s (--short)
 git diff (--staged)
 git add .
 git commit -m "Short message describing what you did. "

Remove newly created file "playArea1.txt" from git (staging and working directory -becomes untracked)

git rm playArea1.txt

######Commit Messages Guide

• Separate subject from body with a blank line
• Limit the subject line to 50 characters
• Capitalize the subject line
• Do not end the subject line with a period
• Use the imperative mood in the subject line
• Wrap the body at 72 characters
• Use the body to explain what and why vs. how

#### View changes ```console git log [-p|--stat|--graph|--oneline][--pretty=short|full|fuller][--since="2 weeks ago"] ``` #### Undo changes *Anything that you lose that you have not commited can never be gotten back* ######If you forgot to add "i_forgot_you.txt" to your commit. ```console git add . git commit --amend ``` ######If you want to unstage (remove from snapshot ready for commit) a file Modify and stage "donkey.txt" ```console git add . ``` Remove file from index ```console git reset HEAD donkey.txt ``` File is in working directory and modified state only. To unmodify (revert it to it's last committed state) DANGEROUS: ```console git checkout -- donkey.txt ``` #### Share With Others ```ShellSession git push ``` #### Update Your Repository ```ShellSession git pull --rebase ``` #### Tag Tag specific version in history as important ```console git tag 'release1' git status git show 'release1' ``` Tag information doesn't usually go with a push. To push tag: ```console git push origin 'release1' ``` ####Aliases Shortcuts for specified commands ```console git config --global alias.co checkout #Next time run 'git co' instead of 'git checkout' git config --global alias.unstage 'reset HEAD --' git config --global alias.last 'log -1 HEAD' ``` Modify playArea2.txt, stage it, then unstage with your new alias

###Branches

Create Branch

git branch 'awesome_branch'
git log --decorate #observe which commits all the branches are pointing to

HEAD - branch git is on at the moment

Switch To New Branch

git checkout 'awesome_branch'

Create commit on new branch and check commits pointed to again
Switch to master, check commits pointed to. Changes are isolated!

git log --decorate --all

Merge Branch

Replay changes in awesome_branch since it diverged from master, record result in a new commit on top of master

git merge master

Random Favourites

git blame
git bisect
git log -Sfind_log_this_word_was_introduced
git stash