Git - Revision history

Graggle at 22:03, 21 April 2026

2026-04-21T22:03:14Z

← Older revision		Revision as of 22:03, 21 April 2026
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	[[Category:Helpdesk]]		[[Category:Helpdesk]]
			[[Category:Software]]

Graggle at 09:20, 21 April 2026

2026-04-21T09:20:39Z

← Older revision		Revision as of 09:20, 21 April 2026
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	You can also specifically allow files or directories inside of ignored directories using an !:		You can also specifically allow files or directories inside of ignored directories using an !:
	!/foo/bar # specifically allows the file bar in the foo directory, even though foo is in the gitignore file		!/foo/bar # specifically allows the file bar in the foo directory, even though foo is in the gitignore file

			[[Category:Helpdesk]]

Digi at 21:42, 11 April 2026

2026-04-11T21:42:49Z

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 If you are looking for a guide on how to host your git repo on Redbrick, click [[Hosting_a_Git_Repo_on_Redbrick|here]]!
 == What is Git? ==
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 * You "stage" the files you've changed
 * You then "commit" these staged files, adding them to the repository.

Digi at 21:23, 11 April 2026

2026-04-11T21:23:28Z

← Older revision		Revision as of 21:23, 11 April 2026
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	== What is Git? ==		== What is Git? ==

	Git is a version control system, used by almost every developer. It allows you to see changes you've made to your code and roll back the project or specific files to previous versions. It is extremely useful for collaborating with several developers via a remote repository and for finding out what happened when a change breaks your project.		Git is a version control system, used by almost every developer. It allows you to see changes you've made to your code and roll back the project or specific files to previous versions. It is extremely useful for collaborating with several developers via a remote repository and for finding out what happened when a change breaks your project.

	== How does it work? ==		== How does it work? ==
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	There are three main states in a git repository:		There are three main states in a git repository:
	- The Working Directory. This the code you are working on, and you can make changes as you like!		* The Working Directory. This the code you are working on, and you can make changes as you like!
	- The Staging Area. These are the files that you plan for git to save a snapshot of.		* The Staging Area. These are the files that you plan for git to save a snapshot of.
	- The Git Repository (repo). This is the ".git" directory made when you initialize a new repo. It tracks and saves the snapshots of your files.		* The Git Repository (repo). This is the ".git" directory made when you initialize a new repo. It tracks and saves the snapshots of your files.

	In practice, it looks like this:		In practice, it looks like this:
	- You work on your code and make changes		* You work on your code and make changes
	- You "stage" the files you've changed		* You "stage" the files you've changed
	- You then "commit" these staged files, adding them to the repository.		* You then "commit" these staged files, adding them to the repository.

Digi at 21:21, 11 April 2026

2026-04-11T21:21:59Z

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 Git is a distributed version control system, like Mercurial.
-At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.
+If you are looking for a guide on how to host your git repo on Redbrick, click [[Hosting_a_Git_Repo_on_Redbrick|here]]!
-== Getting a git repository on Redbrick ==
+== What is Git? ==
-Redbrick hosts git repositories for users. You (and any other users you want) can have write access to the repositories. The world has read-only access via the web interface at [[http://git.redbrick.dcu.ie]]. It's perfect for any small open source projects you feel like starting, or if you want to branch/fork an existing open source project that's hosted on git.
+**Git** is a version control system, used by almost every developer. It allows you to see changes you've made to your code and roll back the project or specific files to previous versions. It is extremely useful for collaborating with several developers via a remote repository and for finding out what happened when a change breaks your project.
-=== Can I have a private repository that the world can't see? ===
+== How does it work? ==
-=== Can I use this to host my third year/fourth year/other important college project? ===
+Git takes "snapshots" of your project whenever a change was made. To save on space, if a file was not changed it will link to the original file instead of making a copy. Think of it as copy and pasting a directory and making a change on the new one, but all of the unchanged files in the new copy are just shortcuts to the files in the old one.
-Long answer: If you have other copies of your code, and Redbrick isn't the primary (only) backup of it, and you just wanted to have yet another backup of it "just because", then ''maybe'' it might make sense to put it on redbrick. But I still wouldn't.
+There are three main states in a git repository:
+- The Working Directory. This the code you are working on, and you can make changes as you like!
-=== Creating an SSH key pair ===
+- The Staging Area. These are the files that you plan for git to save a snapshot of.
-Before you can use redbrick's git repositories from one of your computers (or from your redbrick shell), you need to create a public/private SSH keypair there if you haven't already. You'll need to do this for every device/place that you want to access git from. This might sound annoying, but it also lets you use git without having to type a password every time you need to clone/push/pull.
+- The Git Repository (repo). This is the ".git" directory made when you initialize a new repo. It tracks and saves the snapshots of your files.
-To do this on a Unixey (Linux/Mac OS X/on redbrick) system, run:
+In practice, it looks like this:
+- You work on your code and make changes
-  ssh-keygen -t rsa
+- You "stage" the files you've changed
+- You then "commit" these staged files, adding them to the repository.

Digi at 20:40, 11 April 2026

2026-04-11T20:40:37Z

← Older revision		Revision as of 20:40, 11 April 2026
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	== Getting a git repository on Redbrick ==		== Getting a git repository on Redbrick ==

	`Redbrick hosts git repositories for users. You (and any other users you want) can have write access to the repositories. The world has read-only access via the web interface at [[http://git.redbrick.dcu.ie]]. It's perfect for any small open source projects you feel like starting, or if you want to branch/fork an existing open source project that's hosted on git.		Redbrick hosts git repositories for users. You (and any other users you want) can have write access to the repositories. The world has read-only access via the web interface at [[http://git.redbrick.dcu.ie]]. It's perfect for any small open source projects you feel like starting, or if you want to branch/fork an existing open source project that's hosted on git.

	=== Can I have a private repository that the world can't see? ===		=== Can I have a private repository that the world can't see? ===

Butlerx at 21:02, 3 May 2017

2017-05-03T21:02:26Z

← Older revision		Revision as of 21:02, 3 May 2017
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	At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.		At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.
	[[https://git.redbrick.dcu.ie git.redbrick.dcu.ie]] is alive again.		[https://git.redbrick.dcu.ie git.redbrick.dcu.ie] is alive again.

	== Getting a git repository on Redbrick ==		== Getting a git repository on Redbrick ==

Butlerx at 21:02, 3 May 2017

2017-05-03T21:02:13Z

← Older revision		Revision as of 21:02, 3 May 2017
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	At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.		At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.
	[[https://git.redbrick.dcu.ie]] is alive again.		[[https://git.redbrick.dcu.ie git.redbrick.dcu.ie]] is alive again.

	== Getting a git repository on Redbrick ==		== Getting a git repository on Redbrick ==

Butlerx at 20:59, 3 May 2017

2017-05-03T20:59:11Z

← Older revision		Revision as of 20:59, 3 May 2017
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	At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.		At some stage, someone might put up a full tutorial showing how to use git, but for now, here's a badly written and terribly phrased guide on how to get and use a repository on redbrick's git hosting area.
			[[https://git.redbrick.dcu.ie]] is alive again.
	~~Redbrick do not host your gits any more. The best place for this is~~ [~~http~~://~~www~~.~~github~~.~~com github~~]

	== Getting a git repository on Redbrick ==		== Getting a git repository on Redbrick ==

	~~<strike>~~Redbrick hosts git repositories for users.~~</strike>~~ You (and any other users you want) can have write access to the ~~repository~~. The world has read-only access via the web interface at http://git.redbrick.dcu.ie ~~(although I'm not sure that they can actually pull from there - the system is still a bit of a work in progress), so don't use this to host any code you don't want the world to see~~. It's perfect for any small open source projects you feel like starting ~~though~~, or if you want to branch/fork an existing open source project that's hosted on git.		`Redbrick hosts git repositories for users. You (and any other users you want) can have write access to the repositories. The world has read-only access via the web interface at [[http://git.redbrick.dcu.ie]]. It's perfect for any small open source projects you feel like starting, or if you want to branch/fork an existing open source project that's hosted on git.

	=== Can I have a private repository that the world can't see? ===		=== Can I have a private repository that the world can't see? ===
	~~Not on git~~.~~redbrick.dcu.ie. You could create one in your own home directory if you wanted to do this, but you'll need to figure out how to do it yourself :)~~		Yes any repository can be public or private.

	=== Can I use this to host my third year/fourth year/other important college project? ===		=== Can I use this to host my third year/fourth year/other important college project? ===
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	This has created two files on your computer - id_rsa and id_rsa.pub. id_rsa is your '''private''' SSH key, and id_rsa.pub is the corresponding public key. You keep id_rsa to yourself, and you can give id_rsa.pub to admins to allow you to access a repository. You can also upload it to a remote server (like redbrick) and put it in a specific location to allow you passwordless logins, but you can google for how to do that.		This has created two files on your computer - id_rsa and id_rsa.pub. id_rsa is your '''private''' SSH key, and id_rsa.pub is the corresponding public key. You keep id_rsa to yourself, and you can give id_rsa.pub to admins to allow you to access a repository. You can also upload it to a remote server (like redbrick) and put it in a specific location to allow you passwordless logins, but you can google for how to do that.

	~~=== Ask the admins ===~~
	Find an admin, and ask him/her/it if they'll add your repository to the system. They'll need the name of the repo, and any SSH '''public''' keys (not the private ones) belonging to devices that you want to be able to access your repository from sent to them. For example, if you want to be able to access the repository from your laptop, send them the id_rsa.pub file that you generated on your laptop (you'll find it in ~/.ssh). If you want to get at it from your desktop and your redbrick account, send them the id_rsa.pub files from your redbrick account and your desktop.

	~~If you want to add more devices later, you can always ask the admins to add (or remove) some public keys.~~

	=== Create the repository ===		=== Create the repository ===
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	git push origin master:refs/heads/master		git push origin master:refs/heads/master

	''Things to look out for:'' When you're doing the "git remote add origin" command, make sure you add ".git" to the end of the repository name. The system that redbrick uses (called ~~Gitosis~~, if anybody cares) to manage repositories needs that there. Also, in "git@git.redbrick.dcu.ie", the "git" user isn't a placeholder. You need use that user, not your own redbrick username.		''Things to look out for:'' When you're doing the "git remote add origin" command, make sure you add ".git" to the end of the repository name. The system that redbrick uses (called Gitea, if anybody cares) to manage repositories needs that there. Also, in "git@git.redbrick.dcu.ie", the "git" user isn't a placeholder. You need use that user, not your own redbrick username.

Greenday: /* Getting a git repository on Redbrick */

2016-10-16T21:39:20Z

Getting a git repository on Redbrick

← Older revision		Revision as of 21:39, 16 October 2016
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	== Getting a git repository on Redbrick ==		== Getting a git repository on Redbrick ==

	<strike>Redbrick hosts git repositories for users.</strike> ~~(The admins use it for themselves)~~ You (and any other users you want) can have write access to the repository. The world has read-only access via the web interface at http://git.redbrick.dcu.ie (although I'm not sure that they can actually pull from there - the system is still a bit of a work in progress), so don't use this to host any code you don't want the world to see. It's perfect for any small open source projects you feel like starting though, or if you want to branch/fork an existing open source project that's hosted on git.		<strike>Redbrick hosts git repositories for users.</strike> You (and any other users you want) can have write access to the repository. The world has read-only access via the web interface at http://git.redbrick.dcu.ie (although I'm not sure that they can actually pull from there - the system is still a bit of a work in progress), so don't use this to host any code you don't want the world to see. It's perfect for any small open source projects you feel like starting though, or if you want to branch/fork an existing open source project that's hosted on git.

	=== Can I have a private repository that the world can't see? ===		=== Can I have a private repository that the world can't see? ===