# Git 101

### [Official Documentation](https://git-scm.com/docs/git)

* What is a modern VCS i.e git
* How is it different from the ABAP version management

### Traditional Version Control System:

Check out file --> Modify --> Check in new version

### Decentralized Version Control System:

Everyone has local copy --> Modify and upload to master version control

### GIT Flow:

![](/files/zRNq1vFjJo0LUQed1UT6)

### GIT Steps:

```bash
0. git pull
1. git add
2. git commit -m "message to the moon"
3. git push
4. git pull
```

### How to install, configure a repo and use GUI or cmdline to manage a project

* [GIT-BASH](https://git-scm.com/download/win)

```bash
git config --global user.name 'myuser'
git config --global user.email 'myemail@mydomain.com'
git add -h (better than --help)
```

### Either/Or

1. Local codebase to git (uncommon -it's usually the second option below)

```bash
git init
git status (--short)
touch .gitignore
git add -A
git reset && git status || git rm --cached ONEFILE && git status
```

2\. Git repo to local (common -like hypeyledgy. You're already a developer with access to a project. Code away after you clone it. )

```bash
git clone <url> dir
git remote -v
git branch -a
git pullorigin master ( !! Always check you're on latest version with a pull !! )
git pushorigin master
git diff --staged ( after a git add )
git commit -a -m " git add & git commit in one! "
```

### Nitty gritty and useful

```bash
git log -p --since=" 2 weeks ago "
Pages 1-100 Page 3
git log -p --since=" 2 weeks ago "
git log -S "codethatisbroken" (the grep)
git commit --amend
git checkout --file ## revert modified file to original
git remote -v
git remote add projectos <url>
git remote show origin
git fetch <url>
git checkout sha-1 . || git reset --hard [sha-1]
```

### Branches

```bash
git branch vladut-bugfix
git checkout vladut-bugfix
git push-uorigin vladut-bugfix
```

### Shortcuts

```bash
git config --global alias.co checkout
git config --global alias.br branch
git config --global alias.ci commit
git config --global alias.st status
git mv permissions2.txt permissions.acl
git status
git commit -m "fixed filesname"
git push origin master
```


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