41 lines
1.7 KiB
Markdown
41 lines
1.7 KiB
Markdown
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---
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title: "Lightning talk: Jujutsu"
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date: 2024-11-26
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---
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_This article is also available as a lightning talk: [pdf](./jujutsu_slides.pdf)_
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## What is it?
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[Jujutsu](https://github.com/martinvonz/jj) is a new version control software
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(VCS), like git, mercurial, etc. Git is the actual gold standard for VCS, even if its
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UX could be better. There is a whole ecosystem around git that makes switching
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to similar projects (eg. mercurial) a daunting task. How does jujutsu plans on
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making us switch?
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Jujutsu separates the frontend (what the user interacts with) and the
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backend (how the information is stored). And the main backend is actually git
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repositories. There is a native backend being developed but it's not ready for
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prime time. Sharing the same backend as the most popular VCS, Jujutsu aims to
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improve on the frontend.
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## How does it compare?
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### No branch, only revisions
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Jujutsu understand git commits, but operates at a higher level with revisions.
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Revisions wrap commits, however as you move revisions around (edit with changes,
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or rebase), they keep their id. Only their underlying commit id changes.
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With revision ids being stable, you don't need branches to start working: create
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a new revision, and start working. You will need to create a branch (or bookmark
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in jujutsu world) to push your changes, but it can be done at the end.
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There is no special mode like git's "Detached HEAD", you are always on a revision. You can jump around
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## VCS landscape
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> I was part of the team at Meta that built Sapling for many years. I’m no
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> longer at Meta and I use jj full time.
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>
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> _[Discussion on Lobste.rs](https://lobste.rs/s/rojoz1/jujutsu_jj_git_compatible_vcs#c_foqya4)_
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