Merge branch 'main' of https://forgejo.skynet.ie/Computer_Society/presentations_compsoc

src/slides/compsoc/3_git.md

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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+title   = "Git"
+date    = 2024-09-18
+slides  = true
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+# Git
+
+-------------------------------------------------------------------------
+
+The 4 Ws of Git
+
+-------------------------------------------------------------------------
+
+WHAT is Git?
+
+-------------------------------------------------------------------------
+
+WHO is Git made for?
+
+-------------------------------------------------------------------------
+
+WHY is Git used?
+
+-------------------------------------------------------------------------
+
+WHEN is Git used?
+
+-------------------------------------------------------------------------
+
+Last but not least, HOW do we use Git?
+
+-------------------------------------------------------------------------
+
+Let's start with the WHAT
+
+-------------------------------------------------------------------------
+
+Git is tool that's used in the programming Industry.
+
+-------------------------------------------------------------------------
+
+Specifically to track project work done, and the changes to files we've made.
+
+-------------------------------------------------------------------------
+
+The more correct term is Source Control.
+
+-------------------------------------------------------------------------
+
+It is NOT a programming language.
+
+-------------------------------------------------------------------------
+
+Now we move onto the WHO.
+
+-------------------------------------------------------------------------
+
+Git is a tool made for (usually) us programmers to track the work we've done.
+
+-------------------------------------------------------------------------
+
+Programmer socks (not) included.
+
+-------------------------------------------------------------------------
+
+Now we need to ask the WHY.
+
+-------------------------------------------------------------------------
+
+Why would we need a tool like this?
+
+-------------------------------------------------------------------------
+
+Why not use Google Drive instead?
+
+-------------------------------------------------------------------------
+
+I will find your IP address.
+
+-------------------------------------------------------------------------
+
+In all honesty,
+
+-------------------------------------------------------------------------
+
+It's to help keep track of who did what.
+
+-------------------------------------------------------------------------
+
+And to work on unique features...
+
+-------------------------------------------------------------------------
+
+without affecting the main area/branch (we'll return to this) of our work.
+
+-------------------------------------------------------------------------
+
+Now finally the WHEN.
+
+-------------------------------------------------------------------------
+
+When DO we use git?
+
+-------------------------------------------------------------------------
+
+Because Git keeps track of the changes we've made to files,
+
+-------------------------------------------------------------------------
+
+We can then use it to commit and stage these files,
+
+-------------------------------------------------------------------------
+
+and push them to a place where we can store them.
+
+-------------------------------------------------------------------------
+
+This place is called a Repository.
+
+-------------------------------------------------------------------------
+
+But, an interesting feature of git, is that it allows you to time-travel.
+
+-------------------------------------------------------------------------
+
+Meaning that if a project breaks, you can go back to before it broke.
+
+-------------------------------------------------------------------------
+
+Now I hear you in the audience asking...
+
+-------------------------------------------------------------------------
+
+Why not use SVN?
+
+-------------------------------------------------------------------------
+
+The answer is simple.
+
+-------------------------------------------------------------------------
+
+![NAH](3_git/NAH.jpg)
+
+-------------------------------------------------------------------------
+
+An actual answer is that Git is Distributed, and SVN in centralized.
+
+-------------------------------------------------------------------------
+
+Simply put, devs can store their changes locally on their machines,
+
+-------------------------------------------------------------------------
+
+where on SVN they're stored on a central system.
+
+-------------------------------------------------------------------------
+
+With a central system you NEED to be connected at all times to work on it.
+
+-------------------------------------------------------------------------
+
+You can work locally on git without having to be connected,
+
+-------------------------------------------------------------------------
+
+and then push once you're reconnected.
+
+-------------------------------------------------------------------------
+
+Back to git.
+
+-------------------------------------------------------------------------
+
+Let's start with the basics.
+
+-------------------------------------------------------------------------
+
+# Live demonstration time
+
+Please get your laptop out
+
+-------------------------------------------------------------------------
+
+How to download git & git LFS
+
+-------------------------------------------------------------------------
+
+## Download
+<<https://git-scm.com/downloads>>
+
+-------------------------------------------------------------------------
+
+![img.png](img.png)
+
+-------------------------------------------------------------------------
+
+![img_1.png](img_1.png)
+
+-------------------------------------------------------------------------
+
+![img_2.png](img_2.png)
+
+-------------------------------------------------------------------------
+
+![img_3.png](img_3.png)
+
+-------------------------------------------------------------------------
+
+![img_4.png](img_4.png)
+
+-------------------------------------------------------------------------
+
+![img_5.png](img_5.png)
+
+-------------------------------------------------------------------------
+
+<<https://forgejo.skynet.ie/Skynet/deploy_user>>
+
+
+-------------------------------------------------------------------------
+Don't do this
+![BAD](3_git/bad_message.png)
+
+-------------------------------------------------------------------------
+
+![img_6.png](img_6.png)
+
+-------------------------------------------------------------------------
+
+![img_7.png](img_7.png)
+
+-------------------------------------------------------------------------
+
+![img_8.png](img_8.png)
+
+-------------------------------------------------------------------------
+
+Setup SSH key (see Readme.md))
+
+-------------------------------------------------------------------------
+
+![img_9.png](img_9.png)
+
+-------------------------------------------------------------------------
+
+![img_10.png](img_10.png)
+
+-------------------------------------------------------------------------
+
+![img_12.png](img_12.png)
+
+-------------------------------------------------------------------------
+
+![img_11.png](img_11.png)
+
+-------------------------------------------------------------------------
+
+````bash
+git init
+git remote add origin <repo_url>
+git pull origin <branch_name>
+git add <file_name>
+git commit -m "<commit_message>"
+git push origin <branch_name>
+````
+-------------------------------------------------------------------------
+
+``https://<username>.users.skynet.ie/``