*lsp.txt* LSP NVIM REFERENCE MANUAL LSP client/framework *lsp* *LSP* Nvim supports the Language Server Protocol (LSP), which means it acts as a client to LSP servers and includes a Lua framework `vim.lsp` for building enhanced LSP tools. https://microsoft.github.io/language-server-protocol/ LSP facilitates features like go-to-definition, find-references, hover, completion, rename, format, refactor, etc., using semantic whole-project analysis (unlike |ctags|). Type |gO| to see the table of contents. ============================================================================== QUICKSTART *lsp-quickstart* Nvim provides an LSP client, but the servers are provided by third parties. Follow these steps to get LSP features: 1. Install the nvim-lspconfig plugin. It provides common configuration for various servers so you can get started quickly. https://github.com/neovim/nvim-lspconfig 2. Install a language server. A list of language servers can be found here: https://microsoft.github.io/language-server-protocol/implementors/servers/ See individual server documentation for installation instructions. 3. Add `lua require('lspconfig').xx.setup{…}` to your init.vim, where "xx" is the name of the relevant config. See the nvim-lspconfig README for details. NOTE: Make sure to restart nvim after installing and configuring. 4. Check that an LSP client has attached to the current buffer: > :lua print(vim.inspect(vim.lsp.buf_get_clients())) < *lsp-config* Inline diagnostics are enabled automatically, e.g. syntax errors will be annotated in the buffer. But you probably also want to use other features like go-to-definition, hover, etc. While Nvim does not provide an "auto-completion" framework by default, it is still possible to get completions from the LSP server. To incorporate these completions, it is recommended to use |vim.lsp.omnifunc|, which is an 'omnifunc' handler. When 'omnifunc' is set to `v:lua.vim.lsp.omnifunc`, |i_CTRL-X_CTRL-O| will provide completions from the language server. Example config (in init.vim): > lua << EOF local custom_lsp_attach = function(client) -- See `:help nvim_buf_set_keymap()` for more information vim.api.nvim_buf_set_keymap(0, 'n', 'K', 'lua vim.lsp.buf.hover()', {noremap = true}) vim.api.nvim_buf_set_keymap(0, 'n', '', 'lua vim.lsp.buf.definition()', {noremap = true}) -- ... and other keymappings for LSP -- Use LSP as the handler for omnifunc. -- See `:help omnifunc` and `:help ins-completion` for more information. vim.api.nvim_buf_set_option(0, 'omnifunc', 'v:lua.vim.lsp.omnifunc') -- For plugins with an `on_attach` callback, call them here. For example: -- require('completion').on_attach() end -- An example of configuring for `sumneko_lua`, -- a language server for Lua. -- set the path to the sumneko installation local system_name = "Linux" -- (Linux, macOS, or Windows) local sumneko_root_path = '/path/to/lua-language-server' local sumneko_binary = sumneko_root_path.."/bin/"..system_name.."/lua-language-server" require('lspconfig').sumneko_lua.setup({ cmd = {sumneko_binary, "-E", sumneko_root_path .. "/main.lua"}; -- An example of settings for an LSP server. -- For more options, see nvim-lspconfig settings = { Lua = { runtime = { -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim) version = 'LuaJIT', -- Setup your lua path path = vim.split(package.path, ';'), }, diagnostics = { -- Get the language server to recognize the `vim` global globals = {'vim'}, }, workspace = { -- Make the server aware of Neovim runtime files library = { [vim.fn.expand('$VIMRUNTIME/lua')] = true, [vim.fn.expand('$VIMRUNTIME/lua/vim/lsp')] = true, }, }, } }, on_attach = custom_lsp_attach }) EOF < Full list of features provided by default can be found in |lsp-buf|. ================================================================================ FAQ *lsp-faq* - Q: How to force-reload LSP? A: Stop all clients, then reload the buffer. > :lua vim.lsp.stop_client(vim.lsp.get_active_clients()) :edit - Q: Why isn't completion working? A: In the buffer where you want to use LSP, check that 'omnifunc' is set to "v:lua.vim.lsp.omnifunc": > :verbose set omnifunc? < Some other plugin may be overriding the option. To avoid that, you could set the option in an |after-directory| ftplugin, e.g. "after/ftplugin/python.vim". - Q: How do I run a request synchronously (e.g. for formatting on file save)? A: Use the `_sync` variant of the function provided by |lsp-buf|, if it exists. E.g. code formatting: > " Auto-format *.rs (rust) files prior to saving them autocmd BufWritePre *.rs lua vim.lsp.buf.formatting_sync(nil, 1000) < *lsp-vs-treesitter* - Q: How do LSP and Treesitter compare? A: LSP requires a client and language server. The language server uses semantic analysis to understand code at a project level. This provides language servers with the ability to rename across files, find definitions in external libraries and more. Treesitter is a language parsing library that provides excellent tools for incrementally parsing text and handling errors. This makes it a great fit for editors to understand the contents of the current file for things like syntax highlighting, simple goto-definitions, scope analysis and more. LSP and Treesitter are both great tools for editing and inspecting code. ================================================================================ LSP API *lsp-api* LSP core API is described at |lsp-core|. Those are the core functions for creating and managing clients. The `vim.lsp.buf_…` functions perform operations for all LSP clients attached to the given buffer. |lsp-buf| LSP request/response handlers are implemented as Lua functions (see |lsp-handler|). The |vim.lsp.handlers| table defines default handlers used when creating a new client. Keys are LSP method names: > :lua print(vim.inspect(vim.tbl_keys(vim.lsp.handlers))) < *lsp-method* Methods are the names of requests and notifications as defined by the LSP specification. These LSP requests/notifications are defined by default: callHierarchy/incomingCalls callHierarchy/outgoingCalls textDocument/codeAction textDocument/completion textDocument/declaration* textDocument/definition textDocument/documentHighlight textDocument/documentSymbol textDocument/formatting textDocument/hover textDocument/implementation* textDocument/publishDiagnostics textDocument/rangeFormatting textDocument/references textDocument/rename textDocument/signatureHelp textDocument/typeDefinition* window/logMessage window/showMessage window/showMessageRequest workspace/applyEdit workspace/symbol * NOTE: These are sometimes not implemented by servers. *lsp-handler* lsp-handlers are functions with special signatures that are designed to handle responses and notifications from LSP servers. For |lsp-request|, each |lsp-handler| has this signature: > function(err, method, result, client_id, bufnr, config) < Parameters: ~ {err} (table|nil) When the language server is unable to complete a request, a table with information about the error is sent. Otherwise, it is `nil`. See |lsp-response|. {method} (string) The |lsp-method| name. {result} (Result | Params | nil) When the language server is able to succesfully complete a request, this contains the `result` key of the response. See |lsp-response|. {client_id} (number) The ID of the |vim.lsp.client|. {bufnr} (Buffer) Buffer handle, or 0 for current. {config} (table) Configuration for the handler. Each handler can define it's own configuration table that allows users to customize the behavior of a particular handler. To configure a particular |lsp-handler|, see: |lsp-handler-configuration| Returns: ~ The |lsp-handler| can respond by returning two values: `result, err` Where `err` must be shaped like an RPC error: `{ code, message, data? }` You can use |vim.lsp.rpc_response_error()| to create this object. For |lsp-notification|, each |lsp-handler| has this signature: > function(err, method, params, client_id, bufnr, config) < Parameters: ~ {err} (nil) This is always `nil`. See |lsp-notification| {method} (string) The |lsp-method| name. {params} (Params) This contains the `params` key of the notification. See |lsp-notification| {client_id} (number) The ID of the |vim.lsp.client| {bufnr} (nil) `nil`, as the server doesn't have an associated buffer. {config} (table) Configuration for the handler. Each handler can define it's own configuration table that allows users to customize the behavior of a particular handler. For an example, see: |vim.lsp.diagnostic.on_publish_diagnostics()| To configure a particular |lsp-handler|, see: |lsp-handler-configuration| Returns: ~ The |lsp-handler|'s return value will be ignored. *lsp-handler-configuration* To configure the behavior of a builtin |lsp-handler|, the convenient method |vim.lsp.with()| is provided for users. To configure the behavior of |vim.lsp.diagnostic.on_publish_diagnostics()|, consider the following example, where a new |lsp-handler| is created using |vim.lsp.with()| that no longer generates signs for the diagnostics: > vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with( vim.lsp.diagnostic.on_publish_diagnostics, { -- Disable signs signs = false, } ) < To enable signs, use |vim.lsp.with()| again to create and assign a new |lsp-handler| to |vim.lsp.handlers| for the associated method: > vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with( vim.lsp.diagnostic.on_publish_diagnostics, { -- Enable signs signs = true, } ) < To configure a handler on a per-server basis, you can use the {handlers} key for |vim.lsp.start_client()| > vim.lsp.start_client { ..., -- Other configuration omitted. handlers = { ["textDocument/publishDiagnostics"] = vim.lsp.with( vim.lsp.diagnostic.on_publish_diagnostics, { -- Disable virtual_text virtual_text = false, } }, } < or if using 'nvim-lspconfig', you can use the {handlers} key of `setup()`: > require('lspconfig').rust_analyzer.setup { handlers = { ["textDocument/publishDiagnostics"] = vim.lsp.with( vim.lsp.diagnostic.on_publish_diagnostics, { -- Disable virtual_text virtual_text = false } ), } } < Some handlers do not have an explicitly named handler function (such as |on_publish_diagnostics()|). To override these, first create a reference to the existing handler: > local on_references = vim.lsp.handlers["textDocument/references"] vim.lsp.handlers["textDocument/references"] = vim.lsp.with( on_references, { -- Use location list instead of quickfix list loclist = true, } ) < *lsp-handler-resolution* Handlers can be set by: - Setting a field in |vim.lsp.handlers|. *vim.lsp.handlers* |vim.lsp.handlers| is a global table that contains the default mapping of |lsp-method| names to |lsp-handlers|. To override the handler for the `"textDocument/definition"` method: > vim.lsp.handlers["textDocument/definition"] = my_custom_default_definition < - The {handlers} parameter for |vim.lsp.start_client|. This will set the |lsp-handler| as the default handler for this server. For example: > vim.lsp.start_client { ..., -- Other configuration ommitted. handlers = { ["textDocument/definition"] = my_custom_server_definition }, } - The {handler} parameter for |vim.lsp.buf_request()|. This will set the |lsp-handler| ONLY for the current request. For example: > vim.lsp.buf_request( 0, "textDocument/definition", definition_params, my_request_custom_definition ) < In summary, the |lsp-handler| will be chosen based on the current |lsp-method| in the following order: 1. Handler passed to |vim.lsp.buf_request()|, if any. 2. Handler defined in |vim.lsp.start_client()|, if any. 3. Handler defined in |vim.lsp.handlers|, if any. VIM.LSP.PROTOCOL *vim.lsp.protocol* Module `vim.lsp.protocol` defines constants dictated by the LSP specification, and helper functions for creating protocol-related objects. https://github.com/microsoft/language-server-protocol/raw/gh-pages/_specifications/specification-3-14.md For example `vim.lsp.protocol.ErrorCodes` allows reverse lookup by number or name: > vim.lsp.protocol.TextDocumentSyncKind.Full == 1 vim.lsp.protocol.TextDocumentSyncKind[1] == "Full" < *lsp-response* For the format of the response message, see: https://microsoft.github.io/language-server-protocol/specifications/specification-current/#responseMessage *lsp-notification* For the format of the notification message, see: https://microsoft.github.io/language-server-protocol/specifications/specification-current/#notificationMessage ================================================================================ LSP HIGHLIGHT *lsp-highlight* Reference Highlights: Highlight groups that are meant to be used by |vim.lsp.buf.document_highlight()|. You can see more about the differences in types here: https://microsoft.github.io/language-server-protocol/specification#textDocument_documentHighlight *hl-LspReferenceText* LspReferenceText used for highlighting "text" references *hl-LspReferenceRead* LspReferenceRead used for highlighting "read" references *hl-LspReferenceWrite* LspReferenceWrite used for highlighting "write" references *lsp-highlight-diagnostics* All highlights defined for diagnostics begin with `LspDiagnostics` followed by the type of highlight (e.g., `Sign`, `Underline`, etc.) and then the Severity of the highlight (e.g. `Error`, `Warning`, etc.) Sign, underline and virtual text highlights (by default) are linked to their corresponding LspDiagnosticsDefault highlight. For example, the default highlighting for |hl-LspDiagnosticsSignError| is linked to |hl-LspDiagnosticsDefaultError|. To change the default (and therefore the linked highlights), use the |:highlight| command: > highlight LspDiagnosticsDefaultError guifg="BrightRed" < *hl-LspDiagnosticsDefaultError* LspDiagnosticsDefaultError Used as the base highlight group. Other LspDiagnostic highlights link to this by default (except Underline) *hl-LspDiagnosticsDefaultWarning* LspDiagnosticsDefaultWarning Used as the base highlight group. Other LspDiagnostic highlights link to this by default (except Underline) *hl-LspDiagnosticsDefaultInformation* LspDiagnosticsDefaultInformation Used as the base highlight group. Other LspDiagnostic highlights link to this by default (except Underline) *hl-LspDiagnosticsDefaultHint* LspDiagnosticsDefaultHint Used as the base highlight group. Other LspDiagnostic highlights link to this by default (except Underline) *hl-LspDiagnosticsVirtualTextError* LspDiagnosticsVirtualTextError Used for "Error" diagnostic virtual text. See |vim.lsp.diagnostic.set_virtual_text()| *hl-LspDiagnosticsVirtualTextWarning* LspDiagnosticsVirtualTextWarning Used for "Warning" diagnostic virtual text. See |vim.lsp.diagnostic.set_virtual_text()| *hl-LspDiagnosticsVirtualTextInformation* LspDiagnosticsVirtualTextInformation Used for "Information" diagnostic virtual text. See |vim.lsp.diagnostic.set_virtual_text()| *hl-LspDiagnosticsVirtualTextHint* LspDiagnosticsVirtualTextHint Used for "Hint" diagnostic virtual text. See |vim.lsp.diagnostic.set_virtual_text()| *hl-LspDiagnosticsUnderlineError* LspDiagnosticsUnderlineError Used to underline "Error" diagnostics. See |vim.lsp.diagnostic.set_underline()| *hl-LspDiagnosticsUnderlineWarning* LspDiagnosticsUnderlineWarning Used to underline "Warning" diagnostics. See |vim.lsp.diagnostic.set_underline()| *hl-LspDiagnosticsUnderlineInformation* LspDiagnosticsUnderlineInformation Used to underline "Information" diagnostics. See |vim.lsp.diagnostic.set_underline()| *hl-LspDiagnosticsUnderlineHint* LspDiagnosticsUnderlineHint Used to underline "Hint" diagnostics. See |vim.lsp.diagnostic.set_underline()| *hl-LspDiagnosticsFloatingError* LspDiagnosticsFloatingError Used to color "Error" diagnostic messages in diagnostics float. See |vim.lsp.diagnostic.show_line_diagnostics()| *hl-LspDiagnosticsFloatingWarning* LspDiagnosticsFloatingWarning Used to color "Warning" diagnostic messages in diagnostics float. See |vim.lsp.diagnostic.show_line_diagnostics()| *hl-LspDiagnosticsFloatingInformation* LspDiagnosticsFloatingInformation Used to color "Information" diagnostic messages in diagnostics float. See |vim.lsp.diagnostic.show_line_diagnostics()| *hl-LspDiagnosticsFloatingHint* LspDiagnosticsFloatingHint Used to color "Hint" diagnostic messages in diagnostics float. See |vim.lsp.diagnostic.show_line_diagnostics()| *hl-LspDiagnosticsSignError* LspDiagnosticsSignError Used for "Error" signs in sign column. See |vim.lsp.diagnostic.set_signs()| *hl-LspDiagnosticsSignWarning* LspDiagnosticsSignWarning Used for "Warning" signs in sign column. See |vim.lsp.diagnostic.set_signs()| *hl-LspDiagnosticsSignInformation* LspDiagnosticsSignInformation Used for "Information" signs in sign column. See |vim.lsp.diagnostic.set_signs()| *hl-LspDiagnosticsSignHint* LspDiagnosticsSignHint Used for "Hint" signs in sign column. See |vim.lsp.diagnostic.set_signs()| *lsp-highlight-codelens* Highlight groups related to |lsp-codelens| functionality. *hl-LspCodeLens* LspCodeLens Used to color the virtual text of the codelens. See |nvim_buf_set_extmark()|. LspCodeLensSeparator *hl-LspCodeLensSeparator* Used to color the seperator between two or more code lens. *lsp-highlight-signature* Highlight groups related to |vim.lsp.handlers.signature_help()|. *hl-LspSignatureActiveParameter* LspSignatureActiveParameter Used to highlight the active parameter in the signature help. See |vim.lsp.handlers.signature_help()|. ============================================================================== AUTOCOMMANDS *lsp-autocommands* *LspDiagnosticsChanged* LspDiagnosticsChanged After receiving publishDiagnostics server response ============================================================================== Lua module: vim.lsp *lsp-core* buf_attach_client({bufnr}, {client_id}) *vim.lsp.buf_attach_client()* Implements the `textDocument/did…` notifications required to track a buffer for any language server. Without calling this, the server won't be notified of changes to a buffer. Parameters: ~ {bufnr} (number) Buffer handle, or 0 for current {client_id} (number) Client id buf_get_clients({bufnr}) *vim.lsp.buf_get_clients()* Gets a map of client_id:client pairs for the given buffer, where each value is a |vim.lsp.client| object. Parameters: ~ {bufnr} (optional, number): Buffer handle, or 0 for current buf_is_attached({bufnr}, {client_id}) *vim.lsp.buf_is_attached()* Checks if a buffer is attached for a particular client. Parameters: ~ {bufnr} (number) Buffer handle, or 0 for current {client_id} (number) the client id buf_notify({bufnr}, {method}, {params}) *vim.lsp.buf_notify()* Send a notification to a server Parameters: ~ {bufnr} [number] (optional): The number of the buffer {method} [string]: Name of the request method {params} [string]: Arguments to send to the server Return: ~ true if any client returns true; false otherwise *vim.lsp.buf_request()* buf_request({bufnr}, {method}, {params}, {handler}) Sends an async request for all active clients attached to the buffer. Parameters: ~ {bufnr} (number) Buffer handle, or 0 for current. {method} (string) LSP method name {params} (optional, table) Parameters to send to the server {handler} (optional, function) See |lsp-handler| Return: ~ 2-tuple: • Map of client-id:request-id pairs for all successful requests. • Function which can be used to cancel all the requests. You could instead iterate all clients and call their `cancel_request()` methods. *vim.lsp.buf_request_all()* buf_request_all({bufnr}, {method}, {params}, {callback}) Sends an async request for all active clients attached to the buffer. Executes the callback on the combined result. Parameters are the same as |vim.lsp.buf_request()| but the return result and callback are different. Parameters: ~ {bufnr} (number) Buffer handle, or 0 for current. {method} (string) LSP method name {params} (optional, table) Parameters to send to the server {callback} (function) The callback to call when all requests are finished. Return: ~ (function) A function that will cancel all requests which is the same as the one returned from `buf_request` . *vim.lsp.buf_request_sync()* buf_request_sync({bufnr}, {method}, {params}, {timeout_ms}) Sends a request to all server and waits for the response of all of them. Calls |vim.lsp.buf_request_all()| but blocks Nvim while awaiting the result. Parameters are the same as |vim.lsp.buf_request()| but the return result is different. Wait maximum of {timeout_ms} (default 1000) ms. Parameters: ~ {bufnr} (number) Buffer handle, or 0 for current. {method} (string) LSP method name {params} (optional, table) Parameters to send to the server {timeout_ms} (optional, number, default=1000) Maximum time in milliseconds to wait for a result. Return: ~ Map of client_id:request_result. On timeout, cancel or error, returns `(nil, err)` where `err` is a string describing the failure reason. client() *vim.lsp.client* LSP client object. You can get an active client object via |vim.lsp.get_client_by_id()| or |vim.lsp.get_active_clients()|. • Methods: • request(method, params, [handler], bufnr) Sends a request to the server. This is a thin wrapper around {client.rpc.request} with some additional checking. If {handler} is not specified, If one is not found there, then an error will occur. Returns: {status}, {[client_id]}. {status} is a boolean indicating if the notification was successful. If it is `false` , then it will always be `false` (the client has shutdown). If {status} is `true` , the function returns {request_id} as the second result. You can use this with `client.cancel_request(request_id)` to cancel the request. • request_sync(method, params, timeout_ms, bufnr) Sends a request to the server and synchronously waits for the response. This is a wrapper around {client.request} Returns: { err=err, result=result }, a dictionary, where `err` and `result` come from the |lsp-handler|. On timeout, cancel or error, returns `(nil, err)` where `err` is a string describing the failure reason. If the request was unsuccessful returns `nil` . • notify(method, params) Sends a notification to an LSP server. Returns: a boolean to indicate if the notification was successful. If it is false, then it will always be false (the client has shutdown). • cancel_request(id) Cancels a request with a given request id. Returns: same as `notify()` . • stop([force]) Stops a client, optionally with force. By default, it will just ask the server to shutdown without force. If you request to stop a client which has previously been requested to shutdown, it will automatically escalate and force shutdown. • is_stopped() Checks whether a client is stopped. Returns: true if the client is fully stopped. • on_attach(client, bufnr) Runs the on_attach function from the client's config if it was defined. Useful for buffer-local setup. • Members • {id} (number): The id allocated to the client. • {name} (string): If a name is specified on creation, that will be used. Otherwise it is just the client id. This is used for logs and messages. • {rpc} (table): RPC client object, for low level interaction with the client. See |vim.lsp.rpc.start()|. • {offset_encoding} (string): The encoding used for communicating with the server. You can modify this in the `config` 's `on_init` method before text is sent to the server. • {handlers} (table): The handlers used by the client as described in |lsp-handler|. • {config} (table): copy of the table that was passed by the user to |vim.lsp.start_client()|. • {server_capabilities} (table): Response from the server sent on `initialize` describing the server's capabilities. • {resolved_capabilities} (table): Normalized table of capabilities that we have detected based on the initialize response from the server in `server_capabilities` . client_is_stopped({client_id}) *vim.lsp.client_is_stopped()* Checks whether a client is stopped. Parameters: ~ {client_id} (Number) Return: ~ true if client is stopped, false otherwise. flush({client}) *vim.lsp.flush()* TODO: Documentation get_active_clients() *vim.lsp.get_active_clients()* Gets all active clients. Return: ~ Table of |vim.lsp.client| objects *vim.lsp.get_buffers_by_client_id()* get_buffers_by_client_id({client_id}) Parameters: ~ {client_id} client id Return: ~ list of buffer ids get_client_by_id({client_id}) *vim.lsp.get_client_by_id()* Gets a client by id, or nil if the id is invalid. The returned client may not yet be fully initialized. Parameters: ~ {client_id} client id number Return: ~ |vim.lsp.client| object, or nil get_log_path() *vim.lsp.get_log_path()* Gets the path of the logfile used by the LSP client. Return: ~ (String) Path to logfile. omnifunc({findstart}, {base}) *vim.lsp.omnifunc()* Implements 'omnifunc' compatible LSP completion. Parameters: ~ {findstart} 0 or 1, decides behavior {base} If findstart=0, text to match against Return: ~ (number) Decided by`findstart`: • findstart=0: column where the completion starts, or -2 or -3 • findstart=1: list of matches (actually just calls |complete()|) See also: ~ |complete-functions| |complete-items| |CompleteDone| *vim.lsp.prepare()* prepare({bufnr}, {firstline}, {new_lastline}, {changedtick}) TODO: Documentation reset({client_id}) *vim.lsp.reset()* TODO: Documentation reset_buf({client}, {bufnr}) *vim.lsp.reset_buf()* TODO: Documentation set_log_level({level}) *vim.lsp.set_log_level()* Sets the global log level for LSP logging. Levels by name: "trace", "debug", "info", "warn", "error" Level numbers begin with "trace" at 0 Use `lsp.log_levels` for reverse lookup. Parameters: ~ {level} [number|string] the case insensitive level name or number See also: ~ |vim.lsp.log_levels| start_client({config}) *vim.lsp.start_client()* Starts and initializes a client with the given configuration. Parameters `cmd` and `root_dir` are required. The following parameters describe fields in the {config} table. Parameters: ~ {root_dir} (string) Directory where the LSP server will base its rootUri on initialization. {cmd} (required, string or list treated like |jobstart()|) Base command that initiates the LSP client. {cmd_cwd} (string, default=|getcwd()|) Directory to launch the `cmd` process. Not related to `root_dir` . {cmd_env} (table) Environment flags to pass to the LSP on spawn. Can be specified using keys like a map or as a list with `k=v` pairs or both. Non-string values are coerced to string. Example: > { "PRODUCTION=true"; "TEST=123"; PORT = 8080; HOST = "0.0.0.0"; } < {capabilities} Map overriding the default capabilities defined by |vim.lsp.protocol.make_client_capabilities()|, passed to the language server on initialization. Hint: use make_client_capabilities() and modify its result. • Note: To send an empty dictionary use `{[vim.type_idx]=vim.types.dictionary}` , else it will be encoded as an array. {handlers} Map of language server method names to |lsp-handler| {settings} Map with language server specific settings. These are returned to the language server if requested via `workspace/configuration` . Keys are case-sensitive. {init_options} Values to pass in the initialization request as `initializationOptions` . See `initialize` in the LSP spec. {name} (string, default=client-id) Name in log messages. {workspace_folders} (table) List of workspace folders passed to the language server. Defaults to root_dir if not set. See `workspaceFolders` in the LSP spec {get_language_id} function(bufnr, filetype) -> language ID as string. Defaults to the filetype. {offset_encoding} (default="utf-16") One of "utf-8", "utf-16", or "utf-32" which is the encoding that the LSP server expects. Client does not verify this is correct. {on_error} Callback with parameters (code, ...), invoked when the client operation throws an error. `code` is a number describing the error. Other arguments may be passed depending on the error kind. See |vim.lsp.client_errors| for possible errors. Use `vim.lsp.client_errors[code]` to get human-friendly name. {before_init} Callback with parameters (initialize_params, config) invoked before the LSP "initialize" phase, where `params` contains the parameters being sent to the server and `config` is the config that was passed to |vim.lsp.start_client()|. You can use this to modify parameters before they are sent. {on_init} Callback (client, initialize_result) invoked after LSP "initialize", where `result` is a table of `capabilities` and anything else the server may send. For example, clangd sends `initialize_result.offsetEncoding` if `capabilities.offsetEncoding` was sent to it. You can only modify the `client.offset_encoding` here before any notifications are sent. Most language servers expect to be sent client specified settings after initialization. Neovim does not make this assumption. A `workspace/didChangeConfiguration` notification should be sent to the server during on_init. {on_exit} Callback (code, signal, client_id) invoked on client exit. • code: exit code of the process • signal: number describing the signal used to terminate (if any) • client_id: client handle {on_attach} Callback (client, bufnr) invoked when client attaches to a buffer. {trace} "off" | "messages" | "verbose" | nil passed directly to the language server in the initialize request. Invalid/empty values will default to "off" {flags} A table with flags for the client. The current (experimental) flags are: • allow_incremental_sync (bool, default true): Allow using incremental sync for buffer edits • debounce_text_changes (number, default nil): Debounce didChange notifications to the server by the given number in milliseconds. No debounce occurs if nil Return: ~ Client id. |vim.lsp.get_client_by_id()| Note: client may not be fully initialized. Use `on_init` to do any actions once the client has been initialized. stop_client({client_id}, {force}) *vim.lsp.stop_client()* Stops a client(s). You can also use the `stop()` function on a |vim.lsp.client| object. To stop all clients: > vim.lsp.stop_client(vim.lsp.get_active_clients()) < By default asks the server to shutdown, unless stop was requested already for this client, then force-shutdown is attempted. Parameters: ~ {client_id} client id or |vim.lsp.client| object, or list thereof {force} boolean (optional) shutdown forcefully with({handler}, {override_config}) *vim.lsp.with()* Function to manage overriding defaults for LSP handlers. Parameters: ~ {handler} (function) See |lsp-handler| {override_config} (table) Table containing the keys to override behavior of the {handler} ============================================================================== Lua module: vim.lsp.buf *lsp-buf* *vim.lsp.buf.add_workspace_folder()* add_workspace_folder({workspace_folder}) Add the folder at path to the workspace folders. If {path} is not provided, the user will be prompted for a path using |input()|. clear_references() *vim.lsp.buf.clear_references()* Removes document highlights from current buffer. code_action({context}) *vim.lsp.buf.code_action()* Selects a code action from the input list that is available at the current cursor position. Parameters: ~ {context} (table, optional) Valid `CodeActionContext` object See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_codeAction completion({context}) *vim.lsp.buf.completion()* Retrieves the completion items at the current cursor position. Can only be called in Insert mode. Parameters: ~ {context} (context support not yet implemented) Additional information about the context in which a completion was triggered (how it was triggered, and by which trigger character, if applicable) See also: ~ |vim.lsp.protocol.constants.CompletionTriggerKind| declaration() *vim.lsp.buf.declaration()* Jumps to the declaration of the symbol under the cursor. Note: Many servers do not implement this method. Generally, see |vim.lsp.buf.definition()| instead. definition() *vim.lsp.buf.definition()* Jumps to the definition of the symbol under the cursor. document_highlight() *vim.lsp.buf.document_highlight()* Send request to the server to resolve document highlights for the current text document position. This request can be triggered by a key mapping or by events such as `CursorHold` , eg: > vim.api.nvim_command [[autocmd CursorHold lua vim.lsp.buf.document_highlight()]] vim.api.nvim_command [[autocmd CursorHoldI lua vim.lsp.buf.document_highlight()]] vim.api.nvim_command [[autocmd CursorMoved lua vim.lsp.buf.clear_references()]] < Note: Usage of |vim.lsp.buf.document_highlight()| requires the following highlight groups to be defined or you won't be able to see the actual highlights. |LspReferenceText| |LspReferenceRead| |LspReferenceWrite| document_symbol() *vim.lsp.buf.document_symbol()* Lists all symbols in the current buffer in the quickfix window. execute_command({command}) *vim.lsp.buf.execute_command()* Executes an LSP server command. Parameters: ~ {command} A valid `ExecuteCommandParams` object See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#workspace_executeCommand formatting({options}) *vim.lsp.buf.formatting()* Formats the current buffer. Parameters: ~ {options} (optional, table) Can be used to specify FormattingOptions. Some unspecified options will be automatically derived from the current Neovim options. See also: ~ https://microsoft.github.io/language-server-protocol/specification#textDocument_formatting *vim.lsp.buf.formatting_seq_sync()* formatting_seq_sync({options}, {timeout_ms}, {order}) Formats the current buffer by sequentially requesting formatting from attached clients. Useful when multiple clients with formatting capability are attached. Since it's synchronous, can be used for running on save, to make sure buffer is formatted prior to being saved. {timeout_ms} is passed on to the |vim.lsp.client| `request_sync` method. Example: > vim.api.nvim_command[[autocmd BufWritePre lua vim.lsp.buf.formatting_seq_sync()]] < Parameters: ~ {options} (optional, table) `FormattingOptions` entries {timeout_ms} (optional, number) Request timeout {order} (optional, table) List of client names. Formatting is requested from clients in the following order: first all clients that are not in the `order` list, then the remaining clients in the order as they occur in the `order` list. *vim.lsp.buf.formatting_sync()* formatting_sync({options}, {timeout_ms}) Performs |vim.lsp.buf.formatting()| synchronously. Useful for running on save, to make sure buffer is formatted prior to being saved. {timeout_ms} is passed on to |vim.lsp.buf_request_sync()|. Example: > vim.api.nvim_command[[autocmd BufWritePre lua vim.lsp.buf.formatting_sync()]] < Parameters: ~ {options} Table with valid `FormattingOptions` entries {timeout_ms} (number) Request timeout See also: ~ |vim.lsp.buf.formatting_seq_sync| hover() *vim.lsp.buf.hover()* Displays hover information about the symbol under the cursor in a floating window. Calling the function twice will jump into the floating window. implementation() *vim.lsp.buf.implementation()* Lists all the implementations for the symbol under the cursor in the quickfix window. incoming_calls() *vim.lsp.buf.incoming_calls()* Lists all the call sites of the symbol under the cursor in the |quickfix| window. If the symbol can resolve to multiple items, the user can pick one in the |inputlist|. list_workspace_folders() *vim.lsp.buf.list_workspace_folders()* List workspace folders. outgoing_calls() *vim.lsp.buf.outgoing_calls()* Lists all the items that are called by the symbol under the cursor in the |quickfix| window. If the symbol can resolve to multiple items, the user can pick one in the |inputlist|. *vim.lsp.buf.range_code_action()* range_code_action({context}, {start_pos}, {end_pos}) Performs |vim.lsp.buf.code_action()| for a given range. Parameters: ~ {context} (table, optional) Valid `CodeActionContext` object {start_pos} ({number, number}, optional) mark-indexed position. Defaults to the start of the last visual selection. {end_pos} ({number, number}, optional) mark-indexed position. Defaults to the end of the last visual selection. *vim.lsp.buf.range_formatting()* range_formatting({options}, {start_pos}, {end_pos}) Formats a given range. Parameters: ~ {options} Table with valid `FormattingOptions` entries. {start_pos} ({number, number}, optional) mark-indexed position. Defaults to the start of the last visual selection. {end_pos} ({number, number}, optional) mark-indexed position. Defaults to the end of the last visual selection. references({context}) *vim.lsp.buf.references()* Lists all the references to the symbol under the cursor in the quickfix window. Parameters: ~ {context} (table) Context for the request See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_references *vim.lsp.buf.remove_workspace_folder()* remove_workspace_folder({workspace_folder}) Remove the folder at path from the workspace folders. If {path} is not provided, the user will be prompted for a path using |input()|. rename({new_name}) *vim.lsp.buf.rename()* Renames all references to the symbol under the cursor. Parameters: ~ {new_name} (string) If not provided, the user will be prompted for a new name using |input()|. server_ready() *vim.lsp.buf.server_ready()* Checks whether the language servers attached to the current buffer are ready. Return: ~ `true` if server responds. signature_help() *vim.lsp.buf.signature_help()* Displays signature information about the symbol under the cursor in a floating window. type_definition() *vim.lsp.buf.type_definition()* Jumps to the definition of the type of the symbol under the cursor. workspace_symbol({query}) *vim.lsp.buf.workspace_symbol()* Lists all symbols in the current workspace in the quickfix window. The list is filtered against {query}; if the argument is omitted from the call, the user is prompted to enter a string on the command line. An empty string means no filtering is done. Parameters: ~ {query} (string, optional) ============================================================================== Lua module: vim.lsp.diagnostic *lsp-diagnostic* *vim.lsp.diagnostic.apply_to_diagnostic_items()* apply_to_diagnostic_items({item_handler}, {command}, {opts}) Gets diagnostics, converts them to quickfix/location list items, and applies the item_handler callback to the items. Parameters: ~ {item_handler} function Callback to apply to the diagnostic items {command} string|nil Command to execute after applying the item_handler {opts} table|nil Configuration table. Keys: • {client_id}: (number) • If nil, will consider all clients attached to buffer. • {severity}: (DiagnosticSeverity) • Exclusive severity to consider. Overrides {severity_limit} • {severity_limit}: (DiagnosticSeverity) • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. • {workspace}: (boolean, default false) • Set the list with workspace diagnostics *vim.lsp.diagnostic.clear()* clear({bufnr}, {client_id}, {diagnostic_ns}, {sign_ns}) Clears the currently displayed diagnostics Parameters: ~ {bufnr} number The buffer number {client_id} number the client id {diagnostic_ns} number|nil Associated diagnostic namespace {sign_ns} number|nil Associated sign namespace disable({bufnr}, {client_id}) *vim.lsp.diagnostic.disable()* Disable diagnostics for the given buffer and client Parameters: ~ {bufnr} (optional, number): Buffer handle, defaults to current {client_id} (optional, number): Disable diagnostics for the given client. The default is to disable diagnostics for all attached clients. enable({bufnr}, {client_id}) *vim.lsp.diagnostic.enable()* Enable diagnostics for the given buffer and client Parameters: ~ {bufnr} (optional, number): Buffer handle, defaults to current {client_id} (optional, number): Enable diagnostics for the given client. The default is to enable diagnostics for all attached clients. get({bufnr}, {client_id}, {predicate}) *vim.lsp.diagnostic.get()* Return associated diagnostics for bufnr Parameters: ~ {bufnr} number {client_id} number|nil If nil, then return all of the diagnostics. Else, return just the diagnostics associated with the client_id. {predicate} function|nil Optional function for filtering diagnostics get_all({client_id}) *vim.lsp.diagnostic.get_all()* Get all diagnostics for clients Parameters: ~ {client_id} number Restrict included diagnostics to the client If nil, diagnostics of all clients are included. Return: ~ table with diagnostics grouped by bufnr (bufnr:Diagnostic[]) *vim.lsp.diagnostic.get_count()* get_count({bufnr}, {severity}, {client_id}) Get the counts for a particular severity Useful for showing diagnostic counts in statusline. eg: > function! LspStatus() abort let sl = '' if luaeval('not vim.tbl_isempty(vim.lsp.buf_get_clients(0))') let sl.='%#MyStatuslineLSP#E:' let sl.='%#MyStatuslineLSPErrors#%{luaeval("vim.lsp.diagnostic.get_count(0, [[Error]])")}' let sl.='%#MyStatuslineLSP# W:' let sl.='%#MyStatuslineLSPWarnings#%{luaeval("vim.lsp.diagnostic.get_count(0, [[Warning]])")}' else let sl.='%#MyStatuslineLSPErrors#off' endif return sl endfunction let &l:statusline = '%#MyStatuslineLSP#LSP '.LspStatus() < Parameters: ~ {bufnr} number The buffer number {severity} DiagnosticSeverity {client_id} number the client id *vim.lsp.diagnostic.get_line_diagnostics()* get_line_diagnostics({bufnr}, {line_nr}, {opts}, {client_id}) Get the diagnostics by line Parameters: ~ {bufnr} number|nil The buffer number {line_nr} number|nil The line number {opts} table|nil Configuration keys • severity: (DiagnosticSeverity, default nil) • Only return diagnostics with this severity. Overrides severity_limit • severity_limit: (DiagnosticSeverity, default nil) • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. {client_id|nil} number the client id Return: ~ table Table with map of line number to list of diagnostics. get_next({opts}) *vim.lsp.diagnostic.get_next()* Get the next diagnostic closest to the cursor_position Parameters: ~ {opts} table See |vim.lsp.diagnostic.goto_next()| Return: ~ table Next diagnostic get_next_pos({opts}) *vim.lsp.diagnostic.get_next_pos()* Return the pos, {row, col}, for the next diagnostic in the current buffer. Parameters: ~ {opts} table See |vim.lsp.diagnostic.goto_next()| Return: ~ table Next diagnostic position get_prev({opts}) *vim.lsp.diagnostic.get_prev()* Get the previous diagnostic closest to the cursor_position Parameters: ~ {opts} table See |vim.lsp.diagnostic.goto_next()| Return: ~ table Previous diagnostic get_prev_pos({opts}) *vim.lsp.diagnostic.get_prev_pos()* Return the pos, {row, col}, for the prev diagnostic in the current buffer. Parameters: ~ {opts} table See |vim.lsp.diagnostic.goto_next()| Return: ~ table Previous diagnostic position *vim.lsp.diagnostic.get_virtual_text_chunks_for_line()* get_virtual_text_chunks_for_line({bufnr}, {line}, {line_diags}, {opts}) Default function to get text chunks to display using |nvim_buf_set_extmark()|. Parameters: ~ {bufnr} number The buffer to display the virtual text in {line} number The line number to display the virtual text on {line_diags} Diagnostic [] The diagnostics associated with the line {opts} table See {opts} from |vim.lsp.diagnostic.set_virtual_text()| Return: ~ an array of [text, hl_group] arrays. This can be passed directly to the {virt_text} option of |nvim_buf_set_extmark()|. goto_next({opts}) *vim.lsp.diagnostic.goto_next()* Move to the next diagnostic Parameters: ~ {opts} table|nil Configuration table. Keys: • {client_id}: (number) • If nil, will consider all clients attached to buffer. • {cursor_position}: (Position, default current position) • See |nvim_win_get_cursor()| • {wrap}: (boolean, default true) • Whether to loop around file or not. Similar to 'wrapscan' • {severity}: (DiagnosticSeverity) • Exclusive severity to consider. Overrides {severity_limit} • {severity_limit}: (DiagnosticSeverity) • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. • {enable_popup}: (boolean, default true) • Call |vim.lsp.diagnostic.show_line_diagnostics()| on jump • {popup_opts}: (table) • Table to pass as {opts} parameter to |vim.lsp.diagnostic.show_line_diagnostics()| • {win_id}: (number, default 0) • Window ID goto_prev({opts}) *vim.lsp.diagnostic.goto_prev()* Move to the previous diagnostic Parameters: ~ {opts} table See |vim.lsp.diagnostic.goto_next()| *vim.lsp.diagnostic.on_publish_diagnostics()* on_publish_diagnostics({_}, {_}, {params}, {client_id}, {_}, {config}) |lsp-handler| for the method "textDocument/publishDiagnostics" Note: Each of the configuration options accepts: • `false` : Disable this feature • `true` : Enable this feature, use default settings. • `table` : Enable this feature, use overrides. • `function`: Function with signature (bufnr, client_id) that returns any of the above.> vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with( vim.lsp.diagnostic.on_publish_diagnostics, { -- Enable underline, use default values underline = true, -- Enable virtual text, override spacing to 4 virtual_text = { spacing = 4, }, -- Use a function to dynamically turn signs off -- and on, using buffer local variables signs = function(bufnr, client_id) return vim.bo[bufnr].show_signs == false end, -- Disable a feature update_in_insert = false, } ) < Parameters: ~ {config} table Configuration table. • underline: (default=true) • Apply underlines to diagnostics. • See |vim.lsp.diagnostic.set_underline()| • virtual_text: (default=true) • Apply virtual text to line endings. • See |vim.lsp.diagnostic.set_virtual_text()| • signs: (default=true) • Apply signs for diagnostics. • See |vim.lsp.diagnostic.set_signs()| • update_in_insert: (default=false) • Update diagnostics in InsertMode or wait until InsertLeave • severity_sort: (default=false) • Sort diagnostics (and thus signs and virtual text) redraw({bufnr}, {client_id}) *vim.lsp.diagnostic.redraw()* Redraw diagnostics for the given buffer and client This calls the "textDocument/publishDiagnostics" handler manually using the cached diagnostics already received from the server. This can be useful for redrawing diagnostics after making changes in diagnostics configuration. |lsp-handler-configuration| Parameters: ~ {bufnr} (optional, number): Buffer handle, defaults to current {client_id} (optional, number): Redraw diagnostics for the given client. The default is to redraw diagnostics for all attached clients. reset({client_id}, {buffer_client_map}) *vim.lsp.diagnostic.reset()* Clear diagnotics and diagnostic cache Handles saving diagnostics from multiple clients in the same buffer. Parameters: ~ {client_id} number {buffer_client_map} table map of buffers to active clients save({diagnostics}, {bufnr}, {client_id}) *vim.lsp.diagnostic.save()* Save diagnostics to the current buffer. Handles saving diagnostics from multiple clients in the same buffer. Parameters: ~ {diagnostics} Diagnostic [] {bufnr} number {client_id} number set_loclist({opts}) *vim.lsp.diagnostic.set_loclist()* Sets the location list Parameters: ~ {opts} table|nil Configuration table. Keys: • {open}: (boolean, default true) • Open loclist after set • {client_id}: (number) • If nil, will consider all clients attached to buffer. • {severity}: (DiagnosticSeverity) • Exclusive severity to consider. Overrides {severity_limit} • {severity_limit}: (DiagnosticSeverity) • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. • {workspace}: (boolean, default false) • Set the list with workspace diagnostics set_qflist({opts}) *vim.lsp.diagnostic.set_qflist()* Sets the quickfix list Parameters: ~ {opts} table|nil Configuration table. Keys: • {open}: (boolean, default true) • Open quickfix list after set • {client_id}: (number) • If nil, will consider all clients attached to buffer. • {severity}: (DiagnosticSeverity) • Exclusive severity to consider. Overrides {severity_limit} • {severity_limit}: (DiagnosticSeverity) • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. • {workspace}: (boolean, default true) • Set the list with workspace diagnostics *vim.lsp.diagnostic.set_signs()* set_signs({diagnostics}, {bufnr}, {client_id}, {sign_ns}, {opts}) Set signs for given diagnostics Sign characters can be customized with the following commands: > sign define LspDiagnosticsSignError text=E texthl=LspDiagnosticsSignError linehl= numhl= sign define LspDiagnosticsSignWarning text=W texthl=LspDiagnosticsSignWarning linehl= numhl= sign define LspDiagnosticsSignInformation text=I texthl=LspDiagnosticsSignInformation linehl= numhl= sign define LspDiagnosticsSignHint text=H texthl=LspDiagnosticsSignHint linehl= numhl= < Parameters: ~ {diagnostics} Diagnostic [] {bufnr} number The buffer number {client_id} number the client id {sign_ns} number|nil {opts} table Configuration for signs. Keys: • priority: Set the priority of the signs. • severity_limit (DiagnosticSeverity): • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. *vim.lsp.diagnostic.set_underline()* set_underline({diagnostics}, {bufnr}, {client_id}, {diagnostic_ns}, {opts}) Set underline for given diagnostics Underline highlights can be customized by changing the following |:highlight| groups. > LspDiagnosticsUnderlineError LspDiagnosticsUnderlineWarning LspDiagnosticsUnderlineInformation LspDiagnosticsUnderlineHint < Parameters: ~ {diagnostics} Diagnostic [] {bufnr} number: The buffer number {client_id} number: The client id {diagnostic_ns} number|nil: The namespace {opts} table: Configuration table: • severity_limit (DiagnosticSeverity): • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. *vim.lsp.diagnostic.set_virtual_text()* set_virtual_text({diagnostics}, {bufnr}, {client_id}, {diagnostic_ns}, {opts}) Set virtual text given diagnostics Virtual text highlights can be customized by changing the following |:highlight| groups. > LspDiagnosticsVirtualTextError LspDiagnosticsVirtualTextWarning LspDiagnosticsVirtualTextInformation LspDiagnosticsVirtualTextHint < Parameters: ~ {diagnostics} Diagnostic [] {bufnr} number {client_id} number {diagnostic_ns} number {opts} table Options on how to display virtual text. Keys: • prefix (string): Prefix to display before virtual text on line • spacing (number): Number of spaces to insert before virtual text • severity_limit (DiagnosticSeverity): • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. *vim.lsp.diagnostic.show_diagnostics()* show_diagnostics({opts}, {diagnostics}) Open a floating window with the provided diagnostics The floating window can be customized with the following highlight groups: > LspDiagnosticsFloatingError LspDiagnosticsFloatingWarning LspDiagnosticsFloatingInformation LspDiagnosticsFloatingHint < Parameters: ~ {opts} table Configuration table • show_header (boolean, default true): Show "Diagnostics:" header • all opts for |vim.lsp.util.open_floating_preview()| can be used here {diagnostics} table: The diagnostics to display Return: ~ table {popup_bufnr, win_id} *vim.lsp.diagnostic.show_line_diagnostics()* show_line_diagnostics({opts}, {buf_nr}, {line_nr}, {client_id}) Parameters: ~ {opts} table Configuration table • all opts for |vim.lsp.diagnostic.get_line_diagnostics()| and |show_diagnostics()| can be used here {buf_nr} number|nil The buffer number {line_nr} number|nil The line number {client_id} number|nil the client id Return: ~ table {popup_bufnr, win_id} *vim.lsp.diagnostic.show_position_diagnostics()* show_position_diagnostics({opts}, {buf_nr}, {position}) Parameters: ~ {opts} table|nil Configuration keys • severity: (DiagnosticSeverity, default nil) • Only return diagnostics with this severity. Overrides severity_limit • severity_limit: (DiagnosticSeverity, default nil) • Limit severity of diagnostics found. E.g. "Warning" means { "Error", "Warning" } will be valid. • all opts for |show_diagnostics()| can be used here {buf_nr} number|nil The buffer number {position} table|nil The (0,0)-indexed position Return: ~ table {popup_bufnr, win_id} ============================================================================== Lua module: vim.lsp.codelens *lsp-codelens* display({lenses}, {bufnr}, {client_id}) *vim.lsp.codelens.display()* Display the lenses using virtual text Parameters: ~ {lenses} table of lenses to display ( `CodeLens[] | null` ) {bufnr} number {client_id} number get({bufnr}) *vim.lsp.codelens.get()* Return all lenses for the given buffer Return: ~ table ( `CodeLens[]` ) *vim.lsp.codelens.on_codelens()* on_codelens({err}, {_}, {result}, {client_id}, {bufnr}) |lsp-handler| for the method `textDocument/codeLens` refresh() *vim.lsp.codelens.refresh()* Refresh the codelens for the current buffer It is recommended to trigger this using an autocmd or via keymap. > autocmd BufEnter,CursorHold,InsertLeave lua vim.lsp.codelens.refresh() < run() *vim.lsp.codelens.run()* Run the code lens in the current line save({lenses}, {bufnr}, {client_id}) *vim.lsp.codelens.save()* Store lenses for a specific buffer and client Parameters: ~ {lenses} table of lenses to store ( `CodeLens[] | null` ) {bufnr} number {client_id} number ============================================================================== Lua module: vim.lsp.handlers *lsp-handlers* *vim.lsp.handlers.hover()* hover({_}, {method}, {result}, {_}, {_}, {config}) |lsp-handler| for the method "textDocument/hover" > vim.lsp.handlers["textDocument/hover"] = vim.lsp.with( vim.lsp.handlers.hover, { -- Use a sharp border with `FloatBorder` highlights border = "single" } ) < Parameters: ~ {config} table Configuration table. • border: (default=nil) • Add borders to the floating window • See |vim.api.nvim_open_win()| *vim.lsp.handlers.signature_help()* signature_help({_}, {method}, {result}, {client_id}, {bufnr}, {config}) |lsp-handler| for the method "textDocument/signatureHelp". The active parameter is highlighted with |hl-LspSignatureActiveParameter|. > vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with( vim.lsp.handlers.signature_help, { -- Use a sharp border with `FloatBorder` highlights border = "single" } ) < Parameters: ~ {config} table Configuration table. • border: (default=nil) • Add borders to the floating window • See |vim.api.nvim_open_win()| ============================================================================== Lua module: vim.lsp.util *lsp-util* *vim.lsp.util.apply_text_document_edit()* apply_text_document_edit({text_document_edit}, {index}) Applies a `TextDocumentEdit` , which is a list of changes to a single document. Parameters: ~ {text_document_edit} table: a `TextDocumentEdit` object {index} number: Optional index of the edit, if from a list of edits (or nil, if not from a list) See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentEdit *vim.lsp.util.apply_text_edits()* apply_text_edits({text_edits}, {bufnr}) Applies a list of text edits to a buffer. Parameters: ~ {text_edits} (table) list of `TextEdit` objects {buf_nr} (number) Buffer id See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textEdit *vim.lsp.util.apply_workspace_edit()* apply_workspace_edit({workspace_edit}) Applies a `WorkspaceEdit` . Parameters: ~ {workspace_edit} (table) `WorkspaceEdit` buf_clear_references({bufnr}) *vim.lsp.util.buf_clear_references()* Removes document highlights from a buffer. Parameters: ~ {bufnr} buffer id *vim.lsp.util.buf_highlight_references()* buf_highlight_references({bufnr}, {references}) Shows a list of document highlights for a certain buffer. Parameters: ~ {bufnr} buffer id {references} List of `DocumentHighlight` objects to highlight See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-3-17/#documentHighlight buf_lines({bufnr}) *vim.lsp.util.buf_lines()* TODO: Documentation *vim.lsp.util.character_offset()* character_offset({bufnr}, {row}, {col}) Returns the UTF-32 and UTF-16 offsets for a position in a certain buffer. Parameters: ~ {buf} buffer id (0 for current) {row} 0-indexed line {col} 0-indexed byte offset in line Return: ~ (number, number) UTF-32 and UTF-16 index of the character in line {row} column {col} in buffer {buf} *vim.lsp.util.close_preview_autocmd()* close_preview_autocmd({events}, {winnr}) Creates autocommands to close a preview window when events happen. Parameters: ~ {events} (table) list of events {winnr} (number) window id of preview window See also: ~ |autocmd-events| *vim.lsp.util.compute_diff()* compute_diff({old_lines}, {new_lines}, {start_line_idx}, {end_line_idx}, {offset_encoding}) Returns the range table for the difference between old and new lines Parameters: ~ {old_lines} table list of lines {new_lines} table list of lines {start_line_idx} int line to begin search for first difference {end_line_idx} int line to begin search for last difference {offset_encoding} string encoding requested by language server Return: ~ table start_line_idx and start_col_idx of range *vim.lsp.util.convert_input_to_markdown_lines()* convert_input_to_markdown_lines({input}, {contents}) Converts any of `MarkedString` | `MarkedString[]` | `MarkupContent` into a list of lines containing valid markdown. Useful to populate the hover window for `textDocument/hover` , for parsing the result of `textDocument/signatureHelp` , and potentially others. Parameters: ~ {input} ( `MarkedString` | `MarkedString[]` | `MarkupContent` ) {contents} (table, optional, default `{}` ) List of strings to extend with converted lines Return: ~ {contents}, extended with lines of converted markdown. See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_hover *vim.lsp.util.convert_signature_help_to_markdown_lines()* convert_signature_help_to_markdown_lines({signature_help}, {ft}, {triggers}) Converts `textDocument/SignatureHelp` response to markdown lines. Parameters: ~ {signature_help} Response of `textDocument/SignatureHelp` {ft} optional filetype that will be use as the `lang` for the label markdown code block {triggers} optional list of trigger characters from the lsp server. used to better determine parameter offsets Return: ~ list of lines of converted markdown. See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_signatureHelp create_file({change}) *vim.lsp.util.create_file()* TODO: Documentation delete_file({change}) *vim.lsp.util.delete_file()* TODO: Documentation *vim.lsp.util.diagnostics_to_items()* diagnostics_to_items({diagnostics_by_bufnr}, {predicate}) Convert diagnostics grouped by bufnr to a list of items for use in the quickfix or location list. Parameters: ~ {diagnostics_by_bufnr} table bufnr -> Diagnostic [] {predicate} an optional function to filter the diagnostics. If present, only diagnostic items matching will be included. Return: ~ table (A list of items) *vim.lsp.util.extract_completion_items()* extract_completion_items({result}) Can be used to extract the completion items from a `textDocument/completion` request, which may return one of `CompletionItem[]` , `CompletionList` or null. Parameters: ~ {result} (table) The result of a `textDocument/completion` request Return: ~ (table) List of completion items See also: ~ https://microsoft.github.io/language-server-protocol/specification#textDocument_completion get_effective_tabstop({bufnr}) *vim.lsp.util.get_effective_tabstop()* Returns visual width of tabstop. Parameters: ~ {bufnr} (optional, number): Buffer handle, defaults to current Return: ~ (number) tabstop visual width See also: ~ |softtabstop| get_line({uri}, {row}) *vim.lsp.util.get_line()* Gets the zero-indexed line from the given uri. Parameters: ~ {uri} string uri of the resource to get the line from {row} number zero-indexed line number Return: ~ string the line at row in filename get_lines({uri}, {rows}) *vim.lsp.util.get_lines()* Gets the zero-indexed lines from the given uri. Parameters: ~ {uri} string uri of the resource to get the lines from {rows} number[] zero-indexed line numbers Return: ~ table a table mapping rows to lines get_progress_messages() *vim.lsp.util.get_progress_messages()* TODO: Documentation jump_to_location({location}) *vim.lsp.util.jump_to_location()* Jumps to a location. Parameters: ~ {location} ( `Location` | `LocationLink` ) Return: ~ `true` if the jump succeeded locations_to_items({locations}) *vim.lsp.util.locations_to_items()* Returns the items with the byte position calculated correctly and in sorted order, for display in quickfix and location lists. Parameters: ~ {locations} (table) list of `Location` s or `LocationLink` s Return: ~ (table) list of items lookup_section({settings}, {section}) *vim.lsp.util.lookup_section()* Helper function to return nested values in language server settings Parameters: ~ {settings} a table of language server settings {section} a string indicating the field of the settings table Return: ~ (table or string) The value of settings accessed via section *vim.lsp.util.make_floating_popup_options()* make_floating_popup_options({width}, {height}, {opts}) Creates a table with sensible default options for a floating window. The table can be passed to |nvim_open_win()|. Parameters: ~ {width} (number) window width (in character cells) {height} (number) window height (in character cells) {opts} (table, optional) Return: ~ (table) Options *vim.lsp.util.make_formatting_params()* make_formatting_params({options}) Creates a `DocumentFormattingParams` object for the current buffer and cursor position. Parameters: ~ {options} Table with valid `FormattingOptions` entries Return: ~ `DocumentFormattingParams` object See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_formatting *vim.lsp.util.make_given_range_params()* make_given_range_params({start_pos}, {end_pos}) Using the given range in the current buffer, creates an object that is similar to |vim.lsp.util.make_range_params()|. Parameters: ~ {start_pos} ({number, number}, optional) mark-indexed position. Defaults to the start of the last visual selection. {end_pos} ({number, number}, optional) mark-indexed position. Defaults to the end of the last visual selection. Return: ~ { textDocument = { uri = `current_file_uri` }, range = { start = `start_position` , end = `end_position` } } make_position_params() *vim.lsp.util.make_position_params()* Creates a `TextDocumentPositionParams` object for the current buffer and cursor position. Return: ~ `TextDocumentPositionParams` object See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentPositionParams make_range_params() *vim.lsp.util.make_range_params()* Using the current position in the current buffer, creates an object that can be used as a building block for several LSP requests, such as `textDocument/codeAction` , `textDocument/colorPresentation` , `textDocument/rangeFormatting` . Return: ~ { textDocument = { uri = `current_file_uri` }, range = { start = `current_position` , end = `current_position` } } make_text_document_params() *vim.lsp.util.make_text_document_params()* Creates a `TextDocumentIdentifier` object for the current buffer. Return: ~ `TextDocumentIdentifier` See also: ~ https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentIdentifier *vim.lsp.util.make_workspace_params()* make_workspace_params({added}, {removed}) Create the workspace params Parameters: ~ {added} {removed} *vim.lsp.util.open_floating_preview()* open_floating_preview({contents}, {syntax}, {opts}) Shows contents in a floating window. Parameters: ~ {contents} table of lines to show in window {syntax} string of syntax to set for opened buffer {opts} dictionary with optional fields • height of floating window • width of floating window • wrap boolean enable wrapping of long lines (defaults to true) • wrap_at character to wrap at for computing height when wrap is enabled • max_width maximal width of floating window • max_height maximal height of floating window • pad_left number of columns to pad contents at left • pad_right number of columns to pad contents at right • pad_top number of lines to pad contents at top • pad_bottom number of lines to pad contents at bottom • focus_id if a popup with this id is opened, then focus it • close_events list of events that closes the floating window • focusable (boolean, default true): Make float focusable Return: ~ bufnr,winnr buffer and window number of the newly created floating preview window parse_snippet({input}) *vim.lsp.util.parse_snippet()* Parses snippets in a completion entry. Parameters: ~ {input} (string) unparsed snippet Return: ~ (string) parsed snippet preview_location({location}, {opts}) *vim.lsp.util.preview_location()* Previews a location in a floating window behavior depends on type of location: • for Location, range is shown (e.g., function definition) • for LocationLink, targetRange is shown (e.g., body of function definition) Parameters: ~ {location} a single `Location` or `LocationLink` Return: ~ (bufnr,winnr) buffer and window number of floating window or nil rename({old_fname}, {new_fname}, {opts}) *vim.lsp.util.rename()* Rename old_fname to new_fname Parameters: ~ {opts} (table) set_lines({lines}, {A}, {B}, {new_lines}) *vim.lsp.util.set_lines()* Replaces text in a range with new text. CAUTION: Changes in-place! Parameters: ~ {lines} (table) Original list of strings {A} (table) Start position; a 2-tuple of {line, col} numbers {B} (table) End position; a 2-tuple of {line, col} numbers {new_lines} A list of strings to replace the original Return: ~ (table) The modified {lines} object set_loclist({items}, {win_id}) *vim.lsp.util.set_loclist()* Fills target window's location list with given list of items. Can be obtained with e.g. |vim.lsp.util.locations_to_items()|. Defaults to current window. Parameters: ~ {items} (table) list of items set_qflist({items}) *vim.lsp.util.set_qflist()* Fills quickfix list with given list of items. Can be obtained with e.g. |vim.lsp.util.locations_to_items()|. Parameters: ~ {items} (table) list of items *vim.lsp.util.stylize_markdown()* stylize_markdown({bufnr}, {contents}, {opts}) Converts markdown into syntax highlighted regions by stripping the code blocks and converting them into highlighted code. This will by default insert a blank line separator after those code block regions to improve readability. This method configures the given buffer and returns the lines to set. If you want to open a popup with fancy markdown, use `open_floating_preview` instead Parameters: ~ {contents} table of lines to show in window {opts} dictionary with optional fields • height of floating window • width of floating window • wrap_at character to wrap at for computing height • max_width maximal width of floating window • max_height maximal height of floating window • pad_left number of columns to pad contents at left • pad_right number of columns to pad contents at right • pad_top number of lines to pad contents at top • pad_bottom number of lines to pad contents at bottom • separator insert separator after code block Return: ~ width,height size of float symbols_to_items({symbols}, {bufnr}) *vim.lsp.util.symbols_to_items()* Converts symbols to quickfix list items. Parameters: ~ {symbols} DocumentSymbol[] or SymbolInformation[] *vim.lsp.util.text_document_completion_list_to_complete_items()* text_document_completion_list_to_complete_items({result}, {prefix}) Turns the result of a `textDocument/completion` request into vim-compatible |complete-items|. Parameters: ~ {result} The result of a `textDocument/completion` call, e.g. from |vim.lsp.buf.completion()|, which may be one of `CompletionItem[]` , `CompletionList` or `null` {prefix} (string) the prefix to filter the completion items Return: ~ { matches = complete-items table, incomplete = bool } See also: ~ |complete-items| trim_empty_lines({lines}) *vim.lsp.util.trim_empty_lines()* Removes empty lines from the beginning and end. Parameters: ~ {lines} (table) list of lines to trim Return: ~ (table) trimmed list of lines *vim.lsp.util.try_trim_markdown_code_blocks()* try_trim_markdown_code_blocks({lines}) Accepts markdown lines and tries to reduce them to a filetype if they comprise just a single code block. CAUTION: Modifies the input in-place! Parameters: ~ {lines} (table) list of lines Return: ~ (string) filetype or 'markdown' if it was unchanged. ============================================================================== Lua module: vim.lsp.log *lsp-log* get_filename() *vim.lsp.log.get_filename()* Returns the log filename. Return: ~ (string) log filename set_level({level}) *vim.lsp.log.set_level()* Sets the current log level. Parameters: ~ {level} (string or number) One of `vim.lsp.log.levels` should_log({level}) *vim.lsp.log.should_log()* Checks whether the level is sufficient for logging. Parameters: ~ {level} number log level Return: ~ (bool) true if would log, false if not ============================================================================== Lua module: vim.lsp.rpc *lsp-rpc* format_rpc_error({err}) *vim.lsp.rpc.format_rpc_error()* Constructs an error message from an LSP error object. Parameters: ~ {err} (table) The error object Return: ~ (string) The formatted error message notify({method}, {params}) *vim.lsp.rpc.notify()* Sends a notification to the LSP server. Parameters: ~ {method} (string) The invoked LSP method {params} (table): Parameters for the invoked LSP method Return: ~ (bool) `true` if notification could be sent, `false` if not request({method}, {params}, {callback}) *vim.lsp.rpc.request()* Sends a request to the LSP server and runs {callback} upon response. Parameters: ~ {method} (string) The invoked LSP method {params} (table) Parameters for the invoked LSP method {callback} (function) Callback to invoke Return: ~ (bool, number) `(true, message_id)` if request could be sent, `false` if not *vim.lsp.rpc.rpc_response_error()* rpc_response_error({code}, {message}, {data}) Creates an RPC response object/table. Parameters: ~ {code} RPC error code defined in `vim.lsp.protocol.ErrorCodes` {message} (optional) arbitrary message to send to server {data} (optional) arbitrary data to send to server *vim.lsp.rpc.start()* start({cmd}, {cmd_args}, {dispatchers}, {extra_spawn_params}) Starts an LSP server process and create an LSP RPC client object to interact with it. Parameters: ~ {cmd} (string) Command to start the LSP server. {cmd_args} (table) List of additional string arguments to pass to {cmd}. {dispatchers} (table, optional) Dispatchers for LSP message types. Valid dispatcher names are: • `"notification"` • `"server_request"` • `"on_error"` • `"on_exit"` {extra_spawn_params} (table, optional) Additional context for the LSP server process. May contain: • {cwd} (string) Working directory for the LSP server process • {env} (table) Additional environment variables for LSP server process Return: ~ Client RPC object. Methods: • `notify()` |vim.lsp.rpc.notify()| • `request()` |vim.lsp.rpc.request()| Members: • {pid} (number) The LSP server's PID. • {handle} A handle for low-level interaction with the LSP server process |vim.loop|. ============================================================================== Lua module: vim.lsp.protocol *lsp-protocol* *vim.lsp.protocol.make_client_capabilities()* make_client_capabilities() Gets a new ClientCapabilities object describing the LSP client capabilities. *vim.lsp.protocol.resolve_capabilities()* resolve_capabilities({server_capabilities}) `*` to match one or more characters in a path segment `?` to match on one character in a path segment `**` to match any number of path segments, including none `{}` to group conditions (e.g. `**​/*.{ts,js}` matches all TypeScript and JavaScript files) `[]` to declare a range of characters to match in a path segment (e.g., `example.[0-9]` to match on `example.0` , `example.1` , …) `[!...]` to negate a range of characters to match in a path segment (e.g., `example.[!0-9]` to match on `example.a` , `example.b` , but not `example.0` ) vim:tw=78:ts=8:ft=help:norl: