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afnanenayet/diffsitter

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A tree-sitter based AST difftool to get meaningful semantic diffs

17 mentions on Hacker News by 17 people: 3 stories, 14 comments · first 2021-07-08 · latest 2026-06-17

Mentions per year 17 mentions · busiest year 2021 (6)
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  1. …can use custom diffs for merges, git diff, etc. pretty easily. There are projects like diffsitter ( https://github.com/afnanenayet/diffsitter ) for doing more intelligent diffs like this for supported languages. EDIT: and then an example…
    comment by simcop2387 · 2026-06-17 · in Lore – Open source version control system designed for scalability
  2. ▲ 151
    Diffsitter – A Tree-sitter based AST difftool to get meaningful semantic diffs
    story by mihau · 2025-07-10 · 46 comments
  3. …pattern matching would be awesome. Nothing wrong with being a Rust fanboy :), I have written some ( https://github.com/afnanenayet/diffsitter ).
    comment by affyboi · 2025-05-08 · in Matt Godbolt sold me on Rust by showing me C++
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    Diffsitter, a tree-sitter based AST difftool to get meaningful semantic diffs
    story by cosmojg · 2025-03-07 · 0 comments
  5. for diffing syntax trees, I've been trying out diffsitter, and it feels pretty good so far https://github.com/afnanenayet/diffsitter
    comment by amar1729 · 2025-01-06 · in The evolution of a structural code editor
  6. I'm pretty sure this counts. https://github.com/afnanenayet/diffsitter Certainly the idea has been suggested many times. I think people end up formatting both before/after and doing a diff on formatted before against formatted after. I've…
    comment by benatkin · 2025-01-03 · in Types are a basic tool of software design (2018)
  7. …exactly means, but diffsitter uses tree-sitter and it is comparing ASTs and CSTs of the files. [1] https://github.com/afnanenayet/diffsitter
    comment by emporas · 2024-07-22 · in How far should a programming language aware diff go?
  8. Or https://github.com/afnanenayet/diffsitter . I've tried both and I like them. No preference or notable opinions on them yet!
    comment by dorian-graph · 2023-12-10 · in AST-grep(sg) is a CLI tool for code structural search, lint, and rewriting
  9. …two tools that I have seen that use tree-sitter for diffing: https://github.com/wilfred/difftastic https://github.com/afnanenayet/diffsitter (I have not tried either personally.)
    comment by b3morales · 2022-11-24 · in Emacs: Feature/tree-sitter merged into master
  10. One more tree-sitter based diffing tool - diffsitter https://github.com/afnanenayet/diffsitter
    comment by yewenjie · 2022-09-07 · in Difftastic, the fantastic diff
  11. …I know a lot of people who have a lot of hope for diffsitter (or something like it): https://github.com/afnanenayet/diffsitter Personally, I think the reason most "good" semantic diff tools are proprietary is that they are huge amounts of…
    comment by WorldMaker · 2022-07-05 · in What comes after Git
  12. …Git diffs, there is Diffsitter, which uses Tree Sitter to generate semantic diffs of code files: https://github.com/afnanenayet/diffsitter I have not used it, but it is high on my todo list.
    comment by nerdponx · 2021-09-28 · in What if Git worked with programming languages?
  13. I think everyone may be interested in: https://github.com/afnanenayet/diffsitter Github having an option to have their PR GUI use an AST diff like this could be a fun and useful option.
    comment by res0nat0r · 2021-09-27 · in What if Git worked with programming languages?
  14. Counterpoint: a quick google reveals diffsitter: https://github.com/afnanenayet/diffsitter The output could be a lot more compact, it could do better at adding context (in the same way https://github.com/romgrk/nvim-treesitter-context…
    comment by cormacrelf · 2021-09-27 · in What if Git worked with programming languages?
  15. …tree-sitter. The method used by diffsitter is to compute the path with minimal editing distance: https://github.com/afnanenayet/diffsitter/blob/main/src/ast.... . In the case where the edits are known (because you're re-creating the AST…
    comment by bhl · 2021-07-18 · in Diffsitter: A tree-sitter based AST difftool to get meaningful semantic diffs
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    Diffsitter: A tree-sitter based AST difftool to get meaningful semantic diffs
    story by todsacerdoti · 2021-07-18 · 53 comments
  17. …this project, I wondered specifically about Treesitter's applicability to this problem, and I found https://github.com/afnanenayet/diffsitter . Maybe there's something to be learned there?
    comment by zhengyi13 · 2021-07-08 · in Difftastic: Syntax-aware structured diff tool