{ pkgs, config, lib, ... }: with lib; with builtins; let cfg = config.vim.languages.python; defaultServer = "pyright"; servers = { pyright = { package = pkgs.nodePackages.pyright; lspConfig = '' lspconfig.pyright.setup{ capabilities = capabilities; on_attach = default_on_attach; cmd = ${ if isList cfg.lsp.package then nvim.lua.expToLua cfg.lsp.package else ''{"${cfg.lsp.package}/bin/pyright-langserver", "--stdio"}'' } } ''; }; }; defaultFormat = "black"; formats = { black = { package = pkgs.black; nullConfig = '' table.insert( ls_sources, null_ls.builtins.formatting.black.with({ command = "${cfg.format.package}/bin/black", }) ) ''; }; }; defaultDebugger = "debugpy"; debuggers = { debugpy = { # idk if this is the best way to install/run debugpy package = pkgs.python3.withPackages (ps: with ps; [debugpy]); dapConfig = '' dap.adapters.python = function(cb, config) if config.request == 'attach' then ---@diagnostic disable-next-line: undefined-field local port = (config.connect or config).port ---@diagnostic disable-next-line: undefined-field local host = (config.connect or config).host or '127.0.0.1' cb({ type = 'server', port = assert(port, '`connect.port` is required for a python `attach` configuration'), host = host, options = { source_filetype = 'python', }, }) else cb({ type = 'executable', command = '${getExe cfg.dap.package}', args = { '-m', 'debugpy.adapter' }, options = { source_filetype = 'python', }, }) end end dap.configurations.python = { { -- The first three options are required by nvim-dap type = 'python'; -- the type here established the link to the adapter definition: `dap.adapters.python` request = 'launch'; name = "Launch file"; -- Options below are for debugpy, see https://github.com/microsoft/debugpy/wiki/Debug-configuration-settings for supported options program = "''${file}"; -- This configuration will launch the current file if used. pythonPath = function() -- debugpy supports launching an application with a different interpreter then the one used to launch debugpy itself. -- The code below looks for a `venv` or `.venv` folder in the current directly and uses the python within. -- You could adapt this - to for example use the `VIRTUAL_ENV` environment variable. local cwd = vim.fn.getcwd() if vim.fn.executable(cwd .. '/venv/bin/python') == 1 then return cwd .. '/venv/bin/python' elseif vim.fn.executable(cwd .. '/.venv/bin/python') == 1 then return cwd .. '/.venv/bin/python' elseif vim.fn.executable("python") == 1 then return vim.fn.exepath("python") else -- WARNING cfg.dap.package probably has NO libraries other than builtins and debugpy return '${getExe cfg.dap.package}' end end; }, } ''; }; }; in { options.vim.languages.python = { enable = mkEnableOption "Python language support"; treesitter = { enable = mkEnableOption "Enable Python treesitter" // {default = config.vim.languages.enableTreesitter;}; package = mkOption { description = "Python treesitter grammar to use"; type = types.package; default = pkgs.vimPlugins.nvim-treesitter.builtGrammars.python; }; }; lsp = { enable = mkEnableOption "Enable Python LSP support" // {default = config.vim.languages.enableLSP;}; server = mkOption { description = "Python LSP server to use"; type = with types; enum (attrNames servers); default = defaultServer; }; package = mkOption { description = "python LSP server package"; type = with types; either package (listOf string); default = servers.${cfg.lsp.server}.package; }; }; format = { enable = mkEnableOption "Enable Python formatting" // {default = config.vim.languages.enableFormat;}; type = mkOption { description = "Python formatter to use"; type = with types; enum (attrNames formats); default = defaultFormat; }; package = mkOption { description = "Python formatter package"; type = types.package; default = formats.${cfg.format.type}.package; }; }; # TODO this implementation is very bare bones, I don't know enough python to implement everything dap = { enable = mkOption { description = "Enable Python Debug Adapter"; type = types.bool; default = config.vim.languages.enableDAP; }; debugger = mkOption { description = "Python debugger to use"; type = with types; enum (attrNames debuggers); default = defaultDebugger; }; package = mkOption { description = '' Python debugger package. This is a python package with debugpy installed, see https://nixos.wiki/wiki/Python#Install_Python_Packages. ''; example = literalExpression "with pkgs; python39.withPackages (ps: with ps; [debugpy])"; type = types.package; default = debuggers.${cfg.dap.debugger}.package; }; }; }; config = mkIf cfg.enable (mkMerge [ (mkIf cfg.treesitter.enable { vim.treesitter.enable = true; vim.treesitter.grammars = [cfg.treesitter.package]; }) (mkIf cfg.lsp.enable { vim.lsp.lspconfig.enable = true; vim.lsp.lspconfig.sources.python-lsp = servers.${cfg.lsp.server}.lspConfig; }) (mkIf cfg.format.enable { vim.lsp.null-ls.enable = true; vim.lsp.null-ls.sources.python-format = formats.${cfg.format.type}.nullConfig; }) (mkIf cfg.dap.enable { vim.debugger.nvim-dap.enable = true; vim.debugger.nvim-dap.sources.python-debugger = debuggers.${cfg.dap.debugger}.dapConfig; }) ]); }