git

Git is a distributed version control and source code management (SCM) system.

http://git-scm.com/

SSH public key generation

• ls ~/.ssh
• ssh-keygen # create ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub keys
• cat ~/.ssh/id_rsa.pub # shows key to be sent to the git server admin

Config

• git config --global user.name "John Doe"

• git config --global user.email johndoe@example.com

• git config --list

Local config for repository

• git config user.name "John Doe"

• git config user.email johndoe@example.com

• git config --local --list
• cat .git/config # [user]

Create repository

• cd <project>

• git init #create folder .git
• touch README.md
• touch .gitignore
• git add .
• git commit -m 'Initial commit'
• git remote add origin git@gitserver:/opt/git/project.git # setup origin for repository
• git push origin master

Edit .gitignore #for Java

• *.jar
• *.war
• *.ear
• *.zip

Sample .gitignore

*~
.metadata
*.class
*.jar
*.war 
*.ear 
*.zip
target/

Clone repository

• git clone git@git.server.net:repository.git # by ssh

• git clone https://git.server.net/repository.git #by https

• cd repository

Branch creation based on current branch

• git branch #show current branch
• git checkout -b B/20130801/BRANCH-XYZ master # create new branch based on branch master
• git branch -m B/20130801/BRANCH-XYZ B/20130801/BRANCH-ZZZ # rename local branch
• git push origin B/20130801/BRANCH-ZZZ # push branch B/20130801/BRANCH-ZZZ to remote

Commit to remote branch

• git commit -am 'Message commit xyz ' --all #commit locally
• git pull origin B/20130801/BRANCH-ZZZ # sync with remote branch # fix conflicts and commit conflict resolution
• git push origin B/20130801/BRANCH-ZZZ # send changes to remote branch
• git commit -am 'Message commit asdf ' --all #commit locally
• git pull --rebase origin B/20130801/BRANCH-ZZZ # sync with remote branch with rebase # fix conflicts and commit conflict resolution
• git push origin B/20130801/BRANCH-ZZZ # send changes to remote branch

Merge to other branch

• git checkout master # merge destination branch
• git pull origin master # sync dest branch
• git merge --no-ff B/20130801/BRANCH-ZZZ # merge branch B/20130801/BRANCH-ZZZ to branch master
• git pull origin master
• git push origin master

Reapply .gitignore

• cd <projectFolder>

• git rm -r -f --cached .
• git add .
• git status #check files to be commited

Setup git server on RHEL

http://git-scm.com/book/en/Git-on-the-Server-Setting-Up-the-Server

   1 sudo bash 
   2 adduser git
   3 su git
   4 cd
   5 mkdir .ssh
   6 cd .ssh
   7 git --version # git version 1.7.1
   8 
   9 #generate and paste the pub key from my user on local machine
  10 ssh-keygen -f id_rsa -p
  11 cat ~/.ssh/id_rsa.pub #local machine
  12 
  13 # in the git server
  14 cd .ssh # git account
  15 vim authorized_keys  #git server, paste the content of id_rsa.pub
  16 cd ~
  17 chmod 700 .ssh/
  18 chmod 600 .ssh/authorized_keys 
  19 ssh git@bitarus.allowed.org # test connection from local machine
  20 vim /etc/passwd #change shell for git user
  21 git:x:505:505::/home/git:/usr/bin/git-shell 
  22 
  23 # create project on git server
  24 cd /home/git
  25 mkdir hello.git
  26 cd hello.git
  27 git --bare init
  28 
  29 #create project on local machine
  30 cd ~
  31 cd gitRepository
  32 mkdir hello
  33 cd hello
  34 git init
  35 touch README
  36 git add .
  37 git commit -m 'initial commit'
  38 git config --list #check config
  39 git remote add origin git@bitarus.allowed.org:/home/git/hello.git
  40 git push origin master
  41 git log

Revert file to original

• git checkout -- testFile.txt

Github change from https to ssh

• git remote -v # check current remote repository

• git remote set-url origin git@github.com:user/project.git

Delete local branch development and checkout remote development branch

• git branch -d development
• git checkout -b development origin/development # get local branch from remote branch

Switch between branches

• git checkout development
• git branch # check current branch
• git checkout master
• git branch # check current branch

Get remote branch to local branch

• git fetch origin
• git checkout -b wiki origin/wiki # local branch wiki from remote origin/wiki

Revert to HEAD revision

• git reset --hard HEAD

Make colors show properly on git diff and git log

• git config --global core.pager 'less -R'

Change commit message before a push

• git commit --amend

Files in branch changed between revisions

• git diff --name-only hash1 hash2
• git diff --name-only hash1 HEAD

Clean untracked files and folders

• git clean -n -d
• git clean -f -d

Reset to version in remote repository

• git fetch origin
• git reset --hard origin/master

Git for windows (git bash)

• https://git-scm.com/download/win

Join several commits not pushed

Use the git rebase.

• git rebase -i origin/master

Pick (choose) several commits and put them all with the "squash" commit that usually is the most recent one. It may be cancelled using git rebase --abort.

Difference between remote and local branch

• git diff origin/master..master