Description
This project aims to create a Linux equivalent to the git/fs concept from git9. Now, I'm aware that git provides worktrees, but they are not enough for many use cases. Having a read-only representation of the whole repository simplifies scripting by quite a bit and, most importantly, reduces disk space usage. For instance, during kernel livepatching development, we need to process and analyze the source code of hundreds of kernel versions simultaneously.This is rather painful with git-worktrees, as each kernel branch requires no less than 1G of disk space.
As for the technical details, I'll implement the file system using FUSE. The project itself should not take much time to complete, but let's see where it takes me.
I'll try to keep the same design as git9, so the file system will look something like:
/mnt/git
+-- ctl
+-- HEAD
| +-- tree
| | +--files
| | +--in
| | +--head
| |
| +-- hash
| +-- msg
| +-- parent
|
+-- branch
| |
| +-- heads
| | +-- master
| | +-- [commit files, see HEAD]
| +-- remotes
| +-- origin
| +-- master
| +-- [commit files, see HEAD]
+-- object
+-- 00051fd3f066e8c05ae7d3cf61ee363073b9535f # blob contents
+-- 00051fd3f066e8c05ae7d3cf61ee363073b9535c
+-- [tree contents, see HEAD/tree]
+-- 3f5dbc97ae6caba9928843ec65fb3089b96c9283
+-- [commit files, see HEAD]
So, if you wanted to look at the commit message of the current branch, you could simply do:
cat /mnt/git/HEAD/msg No collaboration needed. This is a solo project.
Goals
Implement a working prototype.
Measure and improve the performance if possible. This step will be the most crucial one. User space filesystems are slower by nature.
Resources
This project is part of:
Hack Week 25
Activity
Comments
-
about 18 hours ago by e_bischoff | Reply
Something similar already exists:
https://github.com/presslabs/gitfs
I don't know how good it is.
SUSE Multi-Linux Manager and Salt also use python311-pygit2 to offer the equivalent.
https://documentation.suse.com/suma/5.0/en/suse-manager/specialized-guides/salt/salt-gitfs.html https://docs.saltproject.io/en/latest/topics/tutorials/gitfs.html
I hope that helps.
-
about 9 hours ago by fgonzalez | Reply
Hi, thanks! Right, there are quite a few similar projects to this one. Unfortunately, all public ones are abandoned and broken (e.g. presslabs/gitfs), and too complex, with many features and dependencies. I just want to build something robust and simple, following the "Unix philosophy", so to speak :)
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Resources