{ config, pkgs, lib, ... }: let inherit (lib.generators) mkLuaInline; inherit (lib.modules) mkIf mkMerge; inherit (lib.nvim.binds) mkMappingOption; inherit (lib.nvim.dag) entryAfter; inherit (lib.nvim.lua) toLuaObject; inherit (lib.nvim.types) mkGrammarOption luaInline; inherit (lib.options) mkOption mkEnableOption mkPackageOption; inherit (lib.strings) optionalString; inherit (lib.types) attrsOf anything bool; listCommandsAction = if config.vim.telescope.enable then ''require("telescope").extensions.metals.commands()'' else ''require("metals").commands()''; cfg = config.vim.languages.scala; usingDap = config.vim.debugger.nvim-dap.enable && cfg.dap.enable; usingLualine = config.vim.statusline.lualine.enable; in { options.vim.languages.scala = { enable = mkEnableOption "Scala language support"; treesitter = { enable = mkEnableOption "Scala treesitter" // {default = config.vim.languages.enableTreesitter;}; package = mkGrammarOption pkgs "scala"; }; lsp = { enable = mkEnableOption "Scala LSP support (metals)" // {default = config.vim.languages.enableLSP;}; package = mkPackageOption pkgs "metals" { default = ["metals"]; }; extraMappings = { listCommands = mkMappingOption "List Metals commands" "<leader>lc"; }; extraSettings = mkOption { type = attrsOf anything; description = "Extra settings passed to the metals config. Check nvim-metals docs for available options"; default = { showImplicitArguments = true; showImplicitConversionsAndClasses = true; showInferredType = true; excludedPackages = [ "akka.actor.typed.javadsl" "com.github.swagger.akka.javadsl" ]; }; }; }; dap = { enable = mkEnableOption "Scala Debug Adapter support (metals)" // {default = config.vim.languages.enableDAP;}; config = mkOption { description = "Lua configuration for dap"; type = luaInline; default = mkLuaInline '' dap.configurations.scala = { { type = "scala", request = "launch", name = "RunOrTest", metals = { runType = "runOrTestFile", --args = { "firstArg", "secondArg", "thirdArg" }, -- here just as an example }, }, { type = "scala", request = "launch", name = "Test Target", metals = { runType = "testTarget", }, }, } ''; }; }; fixShortmess = mkOption { type = bool; description = "Remove the 'F' flag from shortmess to allow messages to be shown. Without doing this, autocommands that deal with filetypes prohibit messages from being shown"; default = true; }; }; config = mkIf cfg.enable ( mkMerge [ (mkIf cfg.treesitter.enable { vim.treesitter.enable = true; vim.treesitter.grammars = [cfg.treesitter.package]; }) (mkIf (cfg.lsp.enable || cfg.dap.enable) { vim = { startPlugins = ["nvim-metals"]; pluginRC.nvim-metals = entryAfter ["lsp-setup"] '' local metals_caps = capabilities -- from lsp-setup local attach_metals_keymaps = function(client, bufnr) attach_keymaps(client, bufnr) -- from lsp-setup vim.api.nvim_buf_set_keymap(bufnr, 'n', '${cfg.lsp.extraMappings.listCommands}', '<cmd>lua ${listCommandsAction}<CR>', {noremap=true, silent=true, desc='Show all Metals commands'}) end metals_config = require('metals').bare_config() ${optionalString usingLualine "metals_config.init_options.statusBarProvider = 'on'"} metals_config.capabilities = metals_caps metals_config.on_attach = function(client, bufnr) ${optionalString usingDap "require('metals').setup_dap()"} attach_metals_keymaps(client, bufnr) end metals_config.settings = ${toLuaObject cfg.lsp.extraSettings} metals_config.settings.metalsBinaryPath = "${cfg.lsp.package}/bin/metals" metals_config.handlers["textDocument/publishDiagnostics"] = vim.lsp.with( vim.lsp.diagnostic.on_publish_diagnostics, { virtual_text = { prefix = '⚠', } } ) ${optionalString cfg.fixShortmess ''vim.opt_global.shortmess:remove("F")''} local lsp_group = vim.api.nvim_create_augroup('lsp', { clear = true }) vim.api.nvim_create_autocmd('FileType', { group = lsp_group, pattern = {'java', 'scala', 'sbt'}, callback = function() require('metals').initialize_or_attach(metals_config) end, }) ''; }; }) ] ); }