nvim: bootstrap minimal nix-first config

.config/nvim/lua/plugins/lsp.lua

@@ -0,0 +1,158 @@
+return {
+  {
+    "folke/lazydev.nvim",
+    ft = "lua",
+    opts = {
+      library = {
+        { path = "${3rd}/luv/library", words = { "vim%.uv" } },
+      },
+    },
+  },
+
+  {
+    "neovim/nvim-lspconfig",
+    event = { "BufReadPre", "BufNewFile" },
+    config = function()
+      -- Nix-first workflow:
+      -- - install language servers with nix profile / flake / devShell
+      -- - start Neovim from a direnv-loaded shell
+      -- - Neovim uses server binaries from PATH only
+      local lspconfig = require("lspconfig")
+      local util = require("lspconfig.util")
+
+      vim.diagnostic.config({
+        severity_sort = true,
+        virtual_text = {
+          spacing = 2,
+          source = "if_many",
+        },
+        float = { border = "rounded" },
+      })
+
+      vim.api.nvim_create_autocmd("LspAttach", {
+        group = vim.api.nvim_create_augroup("user-lsp-attach", { clear = true }),
+        callback = function(event)
+          local map = function(keys, func, desc)
+            vim.keymap.set("n", keys, func, { buffer = event.buf, desc = desc })
+          end
+
+          map("gd", vim.lsp.buf.definition, "Goto definition")
+          map("gD", vim.lsp.buf.declaration, "Goto declaration")
+          map("gr", vim.lsp.buf.references, "Goto references")
+          map("gi", vim.lsp.buf.implementation, "Goto implementation")
+          map("K", vim.lsp.buf.hover, "Hover")
+          map("<leader>rn", vim.lsp.buf.rename, "Rename")
+          map("<leader>ca", vim.lsp.buf.code_action, "Code action")
+          map("<leader>cd", vim.diagnostic.open_float, "Line diagnostics")
+
+          if vim.lsp.inlay_hint then
+            map("<leader>uh", function()
+              vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled({ bufnr = event.buf }), { bufnr = event.buf })
+            end, "Toggle inlay hints")
+          end
+        end,
+      })
+
+      local capabilities = vim.lsp.protocol.make_client_capabilities()
+
+      local ok_blink, blink = pcall(require, "blink.cmp")
+      if ok_blink then
+        capabilities = blink.get_lsp_capabilities(capabilities)
+      end
+
+      local missing = {}
+
+      local function setup(server, bin, config)
+        config = config or {}
+        config.capabilities = vim.tbl_deep_extend("force", capabilities, config.capabilities or {})
+
+        if vim.fn.executable(bin) ~= 1 then
+          table.insert(missing, string.format("%s (%s)", server, bin))
+          return
+        end
+
+        lspconfig[server].setup(config)
+      end
+
+      setup("lua_ls", "lua-language-server", {
+        cmd = { "lua-language-server" },
+        settings = {
+          Lua = {
+            completion = { callSnippet = "Replace" },
+            diagnostics = { globals = { "vim" } },
+            telemetry = { enable = false },
+            workspace = { checkThirdParty = false },
+          },
+        },
+      })
+
+      setup("nixd", "nixd", {
+        cmd = { "nixd" },
+      })
+
+      setup("bashls", "bash-language-server", {
+        cmd = { "bash-language-server", "start" },
+      })
+
+      setup("marksman", "marksman", {
+        cmd = { "marksman", "server" },
+      })
+
+      setup("ts_ls", "typescript-language-server", {
+        cmd = { "typescript-language-server", "--stdio" },
+        root_dir = util.root_pattern("tsconfig.json", "jsconfig.json", "package.json", ".git"),
+        single_file_support = false,
+      })
+
+      setup("gopls", "gopls", {
+        cmd = { "gopls" },
+        settings = {
+          gopls = {
+            gofumpt = true,
+            analyses = {
+              unusedparams = true,
+            },
+            staticcheck = true,
+          },
+        },
+      })
+
+      setup("rust_analyzer", "rust-analyzer", {
+        cmd = { "rust-analyzer" },
+        settings = {
+          ["rust-analyzer"] = {
+            cargo = {
+              allFeatures = true,
+            },
+            checkOnSave = {
+              command = "clippy",
+            },
+          },
+        },
+      })
+
+      setup("pyright", "pyright-langserver", {
+        cmd = { "pyright-langserver", "--stdio" },
+        settings = {
+          python = {
+            analysis = {
+              autoSearchPaths = true,
+              useLibraryCodeForTypes = true,
+              diagnosticMode = "workspace",
+            },
+          },
+        },
+      })
+
+      if #missing > 0 and #vim.api.nvim_list_uis() > 0 then
+        vim.schedule(function()
+          vim.notify(
+            "LSP not on PATH (install with Nix):\n- " .. table.concat(missing, "\n- "),
+            vim.log.levels.INFO,
+            { title = "nvim-lspconfig" }
+          )
+        end)
+      end
+    end,
+  },
+}