GIT_GITHUB_2016_06_17

GIT && GITHUB Date / Time : 17.06.2016 / 6 P.M to 7 P.M (IST) Presented by: Sivaram.N

Agenda ❏ Introduction ❏ Why Git ❏ Install && Setup Git ❏ Git Workflow ❏ Git && Git Hub && Gist ❏ GitHub Pages (gh-pages) ❏ Git Commands ❏ Where Can I Learn More ❏ Misc

Introduction ● Distributed version control system ○ Eg:http://www.compuquip.com/2009/11/20/centralized-vs-distributed-computing/ ● Developed by Linus Torvalds for the development of the Linux Kernel in 2005 ○ Eg:https://www.atlassian.com/git/articles/10-years-of-git/ ● A version control application keeps track of all the changes that you do in the files of your project. ● Eg: VCS : svn, cvs .., DVCS : git, Mercurial...

Why Git ● Free and OpenSource ● It is distributed not centralised ● Everything is local / Offline Usage ● Ignoring Certain Files ● CI friendly repos ● Git hooks for CI ● Collaborative/Individual Development

Install && Setup Install ● Linux ○ $ sudo apt-get install git-all ○ $ git --version # To check version ○ $ git help # To get help ● Mac : https://git-scm.com/download/mac ● Windows: http://windows.github.com

Install && Setup First time Setup : [$git config --list] [‘--global’ is optional] ● Identity ○ $ git config --global user.name "<username>” ○ $ git config --global user.email user@example.com ● Editor ○ $ git config --global core.editor <emacs,vi,nano> ● Color ○ $ git config --global color.ui auto ● Checking Configuration ○ $ git config --list

Git Workflow ● Obtain repository (init/clone/fork) ● Make Some edits/additions (modified) ● Stage your changes (add) ● Commit your work (commit) ● Push to remote (push)

Git && GitHub && Gist Git ● The version control tool which is CLI ● Decentralized source code management protocol GitHub ● Free web based software project hosting ● Git is used as underlying scm protocol Gist ● Gists are a particular service offered on that site, namely code snippets GitHub Pages (gh-pages) ● Hosting static site on GitHub

Github pages (gh-pages) ● Steps to create Github Pages ○ Create new repo ○ Add gh-pages branch ○ Pick Bootstrap template and customize or use Jekyll to generate site ○ Commit the site to the gh-pages branch ● Ref ○ https://pages.github.com/ ○ https://guides.github.com/features/pages/

Git Commands ❏ Setup / Create Repositories ❏ Saving Changes (add / remove / move / commit) ❏ Viewing History / Logs ❏ Branching / Merging ❏ Undoing Changes ❏ Stashing ❏ Remote Commands ❏ Release & Tags ❏ Others

Setup / Create Repositories ● Start a new repository ● Obtain a repository from URL (Download) ● Fork an existing repository ○ A fork is a copy of a repository. ○ Forked project is on your online repository (repo). ○ It allows you to freely exp with changes without affecting the original proj.

Start a new repository ● Adding local project to github repository ○ Create a new repo from github (gui) ○ $ mkdir <name> ○ $ cd <name> ○ $ git init #initialize local directory as git repo ○ $ ls -a # observes ‘.git’ in current directory ○ $ git add . #Adds the files in the local repository ○ $ git commit -m "First commit" #Commits the tracked changes ○ $ git remote add origin remote repository URL # sets remote repo ○ $ git remote -v # Verifies the new remote URL ○ $ git push origin master ● Create a new repo directly from CLI ○ https://coderwall.com/p/mnwcog/create-new-github-repo-from-command-line ○ https://www.viget.com/articles/create-a-github-repo-from-the-command-line

Obtain a repository from URL (Download) ● $ git clone <URL> # URL is either ssh / https ● $ git log # viewing history ● $ git add . #Adds the files in the local repository ● $ git status # checking status ● $ git diff # checking difference ● $ git commit -m "First commit" #Commits the tracked changes ● $ git push origin master

Saving Changes ● $ git status ● $ touch <file_name> ● $ git add <file_name> ● $ git commit -m “added message here…” ● $ git log ---------------------------------------------------------------------------------------------------------------- ● $ git rm <file> ● $ git status ● $ git commit -m “remove message here…” ● $ git mv <old> <new> # renaming file

Viewing History / Logs ● $ git show <commit> ● $ git diff / $ git diff <file1> <file2> .... / $ git diff --name-only ● $ git log ● $ git log -p -2 #show diff & last2 ● $ git log --stat # show stats (file changes) ● $ git log --pretty=online ● git log --pretty=format:”%h-%an, %ar: %s

Branching / Merging ● $ git checkout <branch> ● $ git checkout -b <new_branch> # creating new branch ● $ git branch # show the current branch ● $ git branch -d <branch> # deleting the branch, we must away from group

Undoing Changes ● $ git reset (--hard, --soft) ● $ git revert ● $ git rebase ● $ git cherry-pick # picking specific commit from any branch

Stashing ● $ git stash save # temporary saves the local changes to stack ● $ git stash list # save the local changes ● $ git stash apply/pop # grab the item from stash list) ● $ git stash drop # droping stash changes

Remote ● $ git remote ● $ git push # push the changes to remote repo ● $ git pull # pull the changes from remote repo ● $ git fetch # Fetch all the recent changes from remote repo ● $ git apply <patch> # Apply patch

Release && Tag ● $ git tag <tag_release> # creating tag ● $ git fetch origin --tags # fetching tags ● $ git name-rev --tag --name-only # show current tag

Others ● Pull-requests ● SSH Agent Forwarding ○ https://gist.github.com/apoo/2279196 ○ http://cakebox.readthedocs.io/en/latest/ tutorials/connecting-your-github-ssh-key/ ● Git Hookups with CI && CD

Where Can I Learn More -- Official Site: https://git-scm.com/ - Github: https://github.com/ - Slideshare: http://www.slideshare.net/chacon/getting-git - Try Git : https://try.github.io/levels/1/challenges/1 - Git Test : https://help.github.com/articles/about-gists/ - Code tutorials: http://code.tutsplus.com/tutorials, https://www.atlassian.com/git/tutorials/ - Deploy : https://about.gitlab.com/gitlab-ci/, http://blogs.atlassian.com/2014/04/practical- continuous-deployment/

Thanks for listening ... Sivaram.N Software Engineer

GIT_GITHUB_2016_06_17

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