Middleware Language server parsing diffs
Acts as a server from your editor's point-of-view, and as a client to your "backend" LSPs (such as rust-analyzer or gopls).
Editor -> diff-lsp -> [rust-analyzer, gopls, pylsp, etc]
Allows your editor to use the following lsp capabilities in diffs
- Hover
- Jump Definition
- Find References
- Jump to type definition
- Breadcrumb mode.
Finding the references for a code-review by calling out to rust-analyzer.
diff-lsp mostly follows the standard language-server protocol, so you can configure your clients to use this LSP server. However, diff-lsp typically works on ephemeral buffers (such as git-status or code reviews), and LSP is a file-based protocol. This means that for usage in these buffers, some client modifications are required.
See Documentation for full docs
See diff-lsp.el for configuring & running with emacs.
diff-lsp.el can manage diff-lsp for the following modes:
- magit status
- code-review-server emacs client
- code-review
Right now I have a limitation where you can't add more clients for backend servers in a single sesion with the LSP, and you have to restart it. Normally this is not a problem and is trivial to do. The reason is because of the types with the backends hashmap being not mutable I'd need to put the whole hashmap behind a mutex which gets me into a ton of rust typing headaches.
diff-lsp supports an optional Worktree: parameter in its initialization tempfile. If provided, diff-lsp will attempt to start backend LSP clients in the specified subfolder. This is useful for monorepos or when working in a specific part of a large project. If the worktree subfolder does not exist, it gracefully falls back to the project root.