lsp-execute-code-action: executes code action, like “did you mean X instead of Y?”.lsp-rename: renames the symbol (and all references to it) under point to a new name.lsp-describe-thing-at-point: displays the full documentation of the thing at point.The results are displayed this way due to the helm and helm-xref packages. Next, let’s try to find references of parse_args() by placing the cursor on it and The minibuffer will display (the PID will differ): Usually the last option is what you want. Import project by selecting root directory interactively.Do nothing and ask me again when opening other files from the folder.Do not ask more for the current project (select ignore path interactively).Do not ask more for the current project (add “~/git/vermin/” to lsp-session-folder-blacklist).In this case I’m testing using my vermin project: When LSP does not know which project to associate a file, usually the first time visiting a file, it will ask what to do. If no running language server is handling the particular project, a new one will be spun up to communicate with lsp-mode. Using LSP is easy: open a source code file with one of the major modes associated the lsp hook. Skip the rustup installation if Rust is already installed. % rustup component add rls rust-analysis rust-src The initial configuration is very simple: 2 ![]() Emacs configurationįirst install the lsp-mode package, which is the LSP client that we will be using: Additionally, I use macOS but the installation commands can easily be translated to other solutions and other OSs. ![]() It is assumed that Emacs version 25.1 or later is already installed and setup for basic usage, and that you’re familiar with editing its config file. In this article, I will go over the configuration and setup of Emacs for LSP support of C++, Python, and Rust. LSP reduces an \(m \times n\) complexity problem to \(m + n\): the latter refers to only needing a language server for each language and a client for each IDE, whereas the former means that for every language each IDE would require, in most cases, standalone support. ![]() Adoption is already very good across the field. When running, all editors and IDEs supporting LSP will be able to employ its features. It tackles the code intelligence problem quite nicely: To support a given programming language with LSP, a language server program must be implemented. The Language Server protocol is used between a tool (the client) and a language smartness provider (the server) to integrate features like auto complete, go to definition, find all references and alike into the tool. Mix of static and dynamic (introspection-based) analysis.Having used Emacs since 2006, I never found a good, reliable, and general enough solution to code completion, symbol cross referencing, go-to definition until I stumbled upon the Language Server Protocol ( LSP). This often gives better and more detailed results than When you open the file, the pyls should be automatically started up, and youĬan edit away with LSP-powered code intelligence. ![]() Something similar to switch to the relevant virtualenv before opening the first ( use-package lsp-mode :ensure t :config make sure we have lsp-imenu everywhere we have LSP ( require 'lsp-imenu ) ( add-hook 'lsp-after-open-hook 'lsp-enable-imenu ) get lsp-python-enable defined NB: use either projectile-project-root or ffip-get-project-root-directory or any other function that can be used to find the root directory of a project ( lsp-define-stdio-client lsp-python "python" #' projectile-project-root ' ( "pyls" )) make sure this is activated when python-mode is activated lsp-python-enable is created by macro above ( add-hook 'python-mode-hook ( lambda () ( lsp-python-enable ))) lsp extras ( use-package lsp-ui :ensure t :config ( setq lsp-ui-sideline-ignore-duplicate t ) ( add-hook 'lsp-mode-hook 'lsp-ui-mode )) ( use-package company-lsp :config ( push 'company-lsp company-backends )) NB: only required if you prefer flake8 instead of the default send pyls config via lsp-after-initialize-hook - harmless for other servers due to pyls key, but would prefer only sending this when pyls gets initialised (:initialize function in lsp-define-stdio-client is invoked too early (before server start)) - cpbotha ( defun lsp-set-cfg () ( let (( lsp-cfg ` ( :pyls ( :configurationSources ( "flake8" ))))) TODO: check lsp-cur-workspace here to decide per server / project ( lsp-set-configuration lsp-cfg ))) ( add-hook 'lsp-after-initialize-hook 'lsp-set-cfg ))
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