Barrett Ruth
da7b76555a
Treesitter parses diff hunks in isolation without surrounding code
context, which can cause incorrect highlighting when hunks show partial
blocks (e.g., adding lines inside `return { ... }` without seeing the
`return`). Document this as a known limitation in README and vimdoc.
68 lines
2.5 KiB
Markdown
68 lines
2.5 KiB
Markdown
# diffs.nvim
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**Syntax highlighting for diffs in Neovim**
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Enhance `vim-fugitive` and Neovim's built-in diff mode with language-aware
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syntax highlighting.
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## Features
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- Treesitter syntax highlighting in `:Git` diffs and commit views
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- `:Gdiffsplit` / `:Gvdiffsplit` syntax through diff backgrounds
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- Background-only diff colors for any `&diff` buffer (`:diffthis`, `vimdiff`)
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- Vim syntax fallback for languages without a treesitter parser
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- Hunk header context highlighting (`@@ ... @@ function foo()`)
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- Configurable debouncing, max lines, and diff prefix concealment
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## Requirements
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- Neovim 0.9.0+
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## Installation
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Install with your package manager of choice or via
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[luarocks](https://luarocks.org/modules/barrettruth/diffs.nvim):
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```
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luarocks install diffs.nvim
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```
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## Documentation
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```vim
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:help diffs.nvim
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```
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## Known Limitations
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- **Incomplete syntax context**: Treesitter parses each diff hunk in isolation
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without surrounding code context. When a hunk shows lines added to an existing
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block (e.g., adding a plugin inside `return { ... }`), the parser doesn't see
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the `return` statement and may produce incorrect highlighting. This is
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inherent to parsing code fragments—no diff tooling solves this without
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significant complexity.
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- **Syntax flashing**: `diffs.nvim` hooks into the `FileType fugitive` event
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triggered by `vim-fugitive`, at which point the buffer is preliminarily
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painted. The buffer is then re-painted after `debounce_ms` milliseconds,
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causing an unavoidable visual "flash" even when `debounce_ms = 0`.
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- **Conflicting diff plugins**: `diffs.nvim` may not interact well with other
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plugins that modify diff highlighting. Known plugins that may conflict:
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- [`diffview.nvim`](https://github.com/sindrets/diffview.nvim) - provides its
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own diff highlighting and conflict resolution UI
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- [`mini.diff`](https://github.com/echasnovski/mini.diff) - visualizes buffer
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differences with its own highlighting system
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- [`gitsigns.nvim`](https://github.com/lewis6991/gitsigns.nvim) - generally
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compatible, but both plugins modifying line highlights may produce
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unexpected results
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- [`git-conflict.nvim`](https://github.com/akinsho/git-conflict.nvim) -
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conflict marker highlighting may overlap with `diffs.nvim`
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# Acknowledgements
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- [`vim-fugitive`](https://github.com/tpope/vim-fugitive)
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- [`codediff.nvim`](https://github.com/esmuellert/codediff.nvim)
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- [`diffview.nvim`](https://github.com/sindrets/diffview.nvim)
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