Add cspell, exclusively use null-ls for formatting

Add cspell extension and initial cspell.json ignore list
Disable formatting in all other language servers, use null-ls
exclusively for finer control over formatters
Add additional formatters

.stylua.toml

@@ -0,0 +1,3 @@
+indent_type = "Spaces"
+call_parentheses = "None"
+collapse_simple_statement = "Always"

cspell.json

@@ -0,0 +1,19 @@
+{
+  "flagWords": [],
+  "words": [
+    "builtins",
+    "gitsigns",
+    "autoflake",
+    "beautysh",
+    "fixjson",
+    "fprettify",
+    "isort",
+    "nixfmt",
+    "mdformat",
+    "nixpkgs",
+    "shellharden",
+    "stylua"
+  ],
+  "version": "0.2",
+  "language": "en"
+}

lua/lsp/attach.lua

@@ -1,12 +1,3 @@
--- LSP format call with options
-local lsp_formatting = function(bufnr)
-    vim.lsp.buf.format {
-        bufnr = bufnr,
-        timeout_ms = 2000,
-        async = true,
-    }
-end
-
 -- Use an on_attach function to only map the following keys
 -- after the language server attaches to the current buffer
 local on_attach = function(client, bufnr)
@@ -20,7 +11,18 @@ local on_attach = function(client, bufnr)
     vim.keymap.set("n", "<leader>D", vim.lsp.buf.type_definition, bufopts)
     vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, bufopts)
     vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, bufopts)
-    vim.keymap.set("n", "<leader>i", lsp_formatting, bufopts)
+    vim.keymap.set(
+        "n",
+        "<leader>i",
+        function() vim.lsp.buf.format { bufnr = bufnr, timeout_ms = 2000, async = true } end,
+        bufopts
+    )
+
+    -- specific client tweaks
+    if client.name ~= "null-ls" then client.server_capabilities.documentFormattingProvider = false end
+    if client.name == "ruff_lsp" then client.server_capabilities.hoverProvider = false end
+
+    -- Attach navic and navbuddy if applicable
     if client.server_capabilities.documentSymbolProvider then
         require("nvim-navic").attach(client, bufnr)
         require("nvim-navbuddy").attach(client, bufnr)

lua/lsp/null_ls_sources.lua

@@ -1,8 +1,23 @@
 local null_ls = require "null-ls"
+local cspell = require "cspell"
 return {
+    cspell.code_actions,
     null_ls.builtins.code_actions.gitsigns,
+
+    cspell.diagnostics,
+
+    null_ls.builtins.formatting.alejandra,
+    null_ls.builtins.formatting.autoflake,
+    null_ls.builtins.formatting.beautysh,
     null_ls.builtins.formatting.black,
+    null_ls.builtins.formatting.fixjson,
+    -- null_ls.builtins.formatting.fprettify,
     null_ls.builtins.formatting.isort,
-    null_ls.builtins.formatting.prettier,
-    null_ls.builtins.formatting.trim_whitespace,
+    null_ls.builtins.formatting.mdformat,
+    -- null_ls.builtins.formatting.nixfmt,
+    -- null_ls.builtins.formatting.nixpkgs_fmt,
+    null_ls.builtins.formatting.shellharden,
+    null_ls.builtins.formatting.stylua,
+
+    null_ls.builtins.hover.dictionary,
 }

lua/plugins/lspconfig.lua

@@ -9,7 +9,7 @@ return {
         { "L3MON4D3/LuaSnip", dependencies = { "hrsh7th/nvim-cmp", "saadparwaiz1/cmp_luasnip" } },
         { "windwp/nvim-autopairs", dependencies = { "hrsh7th/nvim-cmp" } },
         { "folke/neodev.nvim", dependencies = { "hrsh7th/nvim-cmp" } },
-        "jose-elias-alvarez/null-ls.nvim",
+        { "jose-elias-alvarez/null-ls.nvim", dependencies = { "davidmh/cspell.nvim" } },
     },
     config = function()
         require "lsp.config"