📌 Git Quick Tips :

git-tips

GIT INIT : 
= Add new repositry in local machin 
   - `git init`
   
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GIT ADD : 
= Add files to git track them 
   - `git add .`
   - `git add -A`
   
=? FAQ :
  ?? What actually do `git add` command ?
    - quick answer - `git add` command, added all untracked files to git that git can track them. 
      this command prepare files to track with git before send a commit to repository.
      
   
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GIT STATUS :
= Show git status for 
  - git status
  <?> note : this command show some information about your current working branch status like untracked and tracked files and commit status

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GIT RM :
= Remove a file from cached 
  - git rm --cached [file-name]
   <?> note : sometimes after use `git add .` command to track files. needing to remove a file from cached list. 
              that's made with `git add .` . the above command help us to remove a file from cache list.

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GIT REMOTE :

= Add new remote repository in to git
  - `git remote add [project-name] [url]`

= Remove old remote repository from git
  - `git remote remove [project-name]`
  
= Update exists remote repository url
  - `git remote set-url [project-name] [url]`

= show list of remote repository
  - `git remote -v`
  - `git remote`

?= FAQ:
   ?? can i have multiple repository on a project ?
      - quick answer yes - during a development a project you might have 2 or more remote repository
        you can add all them to git remote then work with them like send push or pull
  
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GIT PULL :
= Pull remote 'origin' repositry and merge it on local 'master' repository  
  - `git pull [remote-repositry] [local-repository]` 
  <?> note: origin is a name to remote repository you can change it name for ex : `remote-repo` or `github-master` or somthing else

= Pulling unrelated histories repository
  - `git pull [remote-repository] [local-repository] --allow-unrelated-histories`
  <?> note: --allow-unrelated-histories option help us to merging unrelated histories repository.
  <?> note: if during pull command has this error `fata: refusing to marge unrelated histories` ,
            this command help us to mergin and resolve problem.
  
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GIT PUSH :

= Push a local [master] repository to remote [origin] repository for ex on gihub 
  - git push [remote-repository] [local-repository]
  <?> note: after fire this command maybe git needed your username and password on remote repository
            that you must insert your username and password to git that it update your remote repository

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GIT BRANCH
= Show list of branch
  - `git branch`
  <?> note : this command show only local branch on your local git repositry
  - `git brand -a`
  <?> note : this command show list both [remote-branch] and [local-branch]
= Show current branch 
  - `git branch --show-current`
= Create new branch 
  - `git branch [branch-name]`
= Remove a branch
  - `git branch -D [branch-name]`
= Switch to another exists branch 
  - `git checkout [branch-name]`
= Merge a branch on another brand
  - `git merge [another-branch]`
  <?> note : suppose you have 3 branch , 'master', 'dev1', 'dev1_hotfix', you change sometihng in 'dev1_hotfix' and now
             you want merge 'dev1_hotfix' last change 'dev1'. `git merge dev1_hotfix` command help us to merge 'dev1_hotfix'
             to 'dev1'.
  <?> note : to use `git merge dev1_hotfix` frist of all you must switch to 'dev1' branch with `git checkout dev1` then
             use `get merge dev1_hotfi`
  <?> note : after run merge command you can remove another branch for ex: 'dev1_hotfix' with 'get brand -d dev1_hotfix' command.

?= FAQ:
   ?? why we create some branch on a project ?
      - quick answer to add some features and fix some issuse. branchs on git allow us to create a full copy from main source code.
        then it help us to change , fix and update it and after test merged it with main source code.
  
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GIT LOG :
= Show last log commits on your repository
  - `git log`
= Show the number of last log commits 
  - `git log -n 1`
  - `git log -n 10`
= Get help 
  - `git log -help`

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GIT DIFF :
= Show last changes between to commit 
  `git diff`
  
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GIT SUBMODULE :

= Add submodule project in to own project :
   - `git submodule add http://github.com/username/project-name.git`