The bare minimum for syncing Git repos | Hacker News Reader

The bare minimum for syncing Git repos

alexwlchan.net

67 pointsspeckx35 comments

It's interesting to me every time one of these "I just figured out I can use git without GitHub" posts comes up.

The entire design of git was intended to be decentralized. You really don't even need the centralized bare repo! You can just point your machines at each other. With Tailscale these days that's especially easy.

Admittedly, I'm getting old, but for the first couple years I used git professionally ~2008-2011 we just pulled from each other's machines. Directly over SSH. We worked in an office, all had each other's machines as remotes. "Hey, is that feature done? Cool, I'll pull it". It worked really well.

Eventually we tossed a bare repo up on a server in the office and switched to push instead of pull. Finish a feature? Push it up! At some point our devops guy installed Gitlab around that, but we never really used the web ui.

Winds changed, we moved to GitHub, eventually a pull request / code review workflow. Here we are now.

Yeah, you can even just push to an USB stick, if you don't have an Ethernet cable available.

I sometimes clone stuff around my local filesystem and pretty much yeah it's a shame GitHub has captured so much of the mindshare around git.

Funny you mentioned Tailscale, since the Author seems to work there.

> Admittedly, I'm getting old, but for the first couple years I used git professionally ~2008-2011 we just pulled from each other's machines. Directly over SSH. We worked in an office, all had each other's machines as remotes. "Hey, is that feature done? Cool, I'll pull it". It worked really well.

Haha I'm jealous.

We used Airdrop.

And then I was like "shouldn't we use git?"

"Nah, this works fine, you have the code you need now, don't you?"

I was still in my second year of my information science bachelor and he was +60 years old and had programmed for over 2 decades. I was not going to argue with someone that experienced. In retrospect, I should have. But I'd probably been shot down with being "that youngster that always wants to use new technologies" (despite git not being that new anymore).

I recall a time when github was having an outage at the same time me and a coworker were trying to fix a high priority issue. I had pushed my changes before the outage but he couldn't pull them. I proposed that I share my repo locally so he could pull from me, but he looked confused and didn't get it, so I let it drop.

GitHub did an incredibly good job of capturing mindspace around git, to the extent that many users don’t realize that there is any distinction between the tool and the hosting platform.

I’m not sure if this is a large scale thing, but I know it’s definitely true for myself and some others.

My first exposure to Git and GitHub was through GitHub Pages. I was told to use the GitHub web editor, ignore all the ‘git’ stuff, and just write the HTML files there. Then I grew into using GitHub desktop and later VSCode’s git integration. At no point did I have to use ‘git’ on the command line so I didn’t really understand what the tool did or why. I think many people simply don’t see git without GitHub. Some even see GitHub without touching git eg. see the infamous ‘I am new to GitHub and I have lots to say’ post https://www.reddit.com/r/github/comments/1at9br4/i_am_new_to...

Indeed.

The best way to make the distinction really obvious is the phrase: "Github is to git what Pornhub is to porn".

Alas, not a phrase you can use in an educational setting though. And I haven't really found other "hub" examples which would be as instantly recognisable and demonstrative of the difference.

It's a good metaphor, and one could easily substitute "YouTube" into the explanation in really sensitive situations. In less sensitive situations, you might be able to still use "PornHub" so long as you do enough throat-clearing to make it seem like you're not speaking glowingly of it, and YouTube is helpful here, too.

PornHub didn't invent online videos, and the fact that just because someone was talking about watching a video online doesn't mean it wouldn't be really weird for someone else to assume that they meant it was something on PornHub, instead of just an ordinary video on YouTube.

Exactly! I was in university around that time. Our team project needed a non-public repo for us to sync to. Free/Personal Github at the time did not allow for private repos, so I just used my Dropbox folder as the "server". Worked well enough for a bunch of students to use that as a centralized repo.

> You can’t push changes to a non-bare repo – if you try, Git will reject your push.

Sure you can. If the repo has branch foo checked out, but you're changing branch bar, it will happily let you push to bar (or bar->baz). And even if both are working with the same branch, whether or not you get a warning or it's accepted or rejected is controlled by 'receive.denyCurrentBranch'.

> Because nobody can “work” inside a bare repo, it’s always safe to receive pushes from other locations

Mmm... it's "safe" depending on what you're pushing and what's on the other end, which is no different from trying to push to a non-bare repo.

This is one of gits best features . SSH deploys with offline remote version tracking

GitHub having a connection of ssh public keys is another feature that's really neat. You can give someone access to your server without having to give them a password somehow.

Exactly. And it’s great to move code around without having to add keys to GitHub/gitlab. Wherever you have ssh access you can push refs , build and deploy. Great for embedded systems where you may have dozens and you don’t want to add keys to GitHub for each one.

Another nice little "hidden" thing is that you can get people's public keys from just a GitHub username, and be kind of sure it is keys in active use, by doing http://github.com/$username.keys.

Adding access to a new user? `curl https://github.com/embedding-shapes.keys >> /home/user/.ssh/authorized_keys`

this is a really neat trick

That is what I was saying. Thank you for giving the instructions I didn't have the time to write out!

> You can’t push changes to a non-bare repo – if you try, Git will reject your push.

You can push to a folder with a non-bare Git repo, it’s just that you can’t push the same branch which it has checked out.

Or in other words, if you get an error when trying to push to a folder with a checked out repo, push to a different remote branch.

(I do this regularly between WSL and the Windows host)

It's common to sync via ssh

    git clone ssh://mydyn.dns/path/to/repo

If you have unique ssh settings you can put them in .ssh/config

but fyi, depending on your needs, git clone/push/pull doesn't sync everything. For example it doesn't sync .git/hooks

When I quit my last job, I was the only employee left that understood our tech stack. The other was a mechanical engineer and industrial designer. Because I felt that CEO could barely comprehend what git is or why it's important to pay AWS on time, I made a full backup of everything on a USB hard drive.

If you ever need to do this, it can be as simple as "git mirror", with extra steps for LFS and other addons.

That guy definitely did not deserve me to give him $100 of my own personal hard drive stash but out of some sick sense of professionalism I felt I had to give him a failsafe archive. Because, you guessed it, not one byte of the entire company was backed up anywhere.

I'd be careful with that. He sounds like he'd be the dog that bites the hands and sue your for stealing company code

Cool! I wrote a similar blog post last year when I decided to "Cut GitHub out of the loop"

https://www.circusscientist.com/2025/07/23/cutting-github-ou...

My motivation was mainly the fact that Bitbucket cut their free tier, and who knows how long GitHub will be free? So I tried and found out how easy git actually is to sync without third parties

> and who knows how long GitHub will be free?

Apparently for as long as it will enable Microsoft to profit by training its LLMs on people's code.

For people uncomfortable with working on free/libre stuff with git directly I always suggest Codeberg as an alternative, but hands on git is also an excellent option.

I use bare git repos and then a statically generated git web viewer using https://pgit.pico.sh

> I used to throw every scrap of code onto GitHub in the vague hope of “sharing knowledge”

I looked at a random repo today, and used some of its (MIT licensed) code as a starting point.

It was an expo plugin for managing android key stores, I didn't need most of what it did, and I went a different direction in the remaining bits - but it still helped me do that quickly. That won't show up in any stats the author can see, but I appreciate their contribution

I had a collection of bare repos like this on a private server for a while, but eventually decided to move them to a self-hosted forgejo instance. It provides a nice web interface, and can be configured to create a new repo simply by pushing to a new non-existing repo name, super handy.

I know you're not really supposed to do it, but I've kept my git bare repos in syncthing for years

as long as you don't work on two machines at once and they're always online it's ... fine

(I do have a daily backup though)

Im quite happy with my setup.

I have the stock git server on a vm, gitweb to view things in the browser and gitolite for basic permission management.

Very low tech, almost no maintenance necessary and I dont more for hosting personal projects

You know you can send commit by email ?

Funny to imagine they may have thought this would be a key USP when developing the feature.

Git was designed for Linux kernel development, which still uses email patches for contributions.

I stand corrected, email appears to be a perfectly logical way of sharing pull requests.

Comment threads certainly work better through email than on GitHub PRs, at least when you can use a good email client (i.e., running locally, and not Outlook).

The challenge is integration with CI and other automatic work flows.

Wait until you hear about subtree

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