4 files changed, 177 insertions, 0 deletions
diff --git a/nvim/lua/user/lsp/handlers.lua b/nvim/lua/user/lsp/handlers.lua
new file mode 100644
index 0000000..8de0abd
--- /dev/null
+++ b/nvim/lua/user/lsp/handlers.lua
@@ -0,0 +1,104 @@
+local M = {}
+
+-- TODO: backfill this to template
+M.setup = function()
+  local signs = {
+    { name = "DiagnosticSignError", text = "" },
+    { name = "DiagnosticSignWarn", text = "" },
+    { name = "DiagnosticSignHint", text = "" },
+    { name = "DiagnosticSignInfo", text = "" },
+  }
+
+  for _, sign in ipairs(signs) do
+    vim.fn.sign_define(sign.name, { texthl = sign.name, text = sign.text, numhl = "" })
+  end
+
+  local config = {
+    -- disable virtual text
+    virtual_text = false,
+    -- show signs
+    signs = {
+      active = signs,
+    },
+    update_in_insert = true,
+    underline = true,
+    severity_sort = true,
+    float = {
+      focusable = false,
+      style = "minimal",
+      border = "rounded",
+      source = "always",
+      header = "",
+      prefix = "",
+    },
+  }
+
+  vim.diagnostic.config(config)
+
+  vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, {
+    border = "rounded",
+  })
+
+  vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, {
+    border = "rounded",
+  })
+end
+
+local function lsp_highlight_document(client)
+  -- Set autocommands conditional on server_capabilities
+  if client.server_capabilities.documentHighlight then
+    vim.api.nvim_exec(
+      [[
+      augroup lsp_document_highlight
+        autocmd! * <buffer>
+        autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
+        autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
+      augroup END
+    ]],
+      false
+    )
+  end
+end
+
+local function lsp_keymaps(bufnr)
+  local opts = { noremap = true, silent = true }
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<cmd>lua vim.lsp.buf.declaration()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "K", "<cmd>lua vim.lsp.buf.hover()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "<C-k>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)
+  -- vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)
+  -- vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<cmd>lua vim.lsp.buf.code_action()<CR>", opts)
+  -- vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>f", "<cmd>lua vim.diagnostic.open_float()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "[d", '<cmd>lua vim.diagnostic.goto_prev({ border = "rounded" })<CR>', opts)
+  vim.api.nvim_buf_set_keymap(
+    bufnr,
+    "n",
+    "gl",
+    '<cmd>lua vim.diagnostic.open_float()<CR>',
+    opts
+  )
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "]d", '<cmd>lua vim.diagnostic.goto_next({ border = "rounded" })<CR>', opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>q", "<cmd>lua vim.diagnostic.setloclist()<CR>", opts)
+  vim.cmd [[ command! Format execute 'lua vim.lsp.buf.formatting()' ]]
+end
+
+M.on_attach = function(client, bufnr)
+  if client.name == "tsserver" then
+    client.server_capabilities.documentFormattingProvider = false
+  end
+  lsp_keymaps(bufnr)
+  lsp_highlight_document(client)
+end
+
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+
+local status_ok, cmp_nvim_lsp = pcall(require, "cmp_nvim_lsp")
+if not status_ok then
+  return
+end
+
+M.capabilities = cmp_nvim_lsp.default_capabilities(capabilities)
+
+return M
diff --git a/nvim/lua/user/lsp/init.lua b/nvim/lua/user/lsp/init.lua
new file mode 100644
index 0000000..8a84467
--- /dev/null
+++ b/nvim/lua/user/lsp/init.lua
@@ -0,0 +1,7 @@
+local status_ok, _ = pcall(require, "lspconfig")
+if not status_ok then
+  return
+end
+
+require "user.lsp.mason"
+require("user.lsp.handlers").setup()
diff --git a/nvim/lua/user/lsp/mason.lua b/nvim/lua/user/lsp/mason.lua
new file mode 100644
index 0000000..a2e5384
--- /dev/null
+++ b/nvim/lua/user/lsp/mason.lua
@@ -0,0 +1,47 @@
+local servers = {
+	"lua_ls",
+	"pyright",
+	"jsonls",
+}
+
+local settings = {
+	ui = {
+		border = "none",
+		icons = {
+			package_installed = "◍",
+			package_pending = "◍",
+			package_uninstalled = "◍",
+		},
+	},
+	log_level = vim.log.levels.INFO,
+	max_concurrent_installers = 4,
+}
+
+require("mason").setup(settings)
+require("mason-lspconfig").setup({
+	ensure_installed = servers,
+	automatic_installation = true,
+})
+
+local lspconfig_status_ok, lspconfig = pcall(require, "lspconfig")
+if not lspconfig_status_ok then
+	return
+end
+
+local opts = {}
+
+for _, server in pairs(servers) do
+	opts = {
+		on_attach = require("user.lsp.handlers").on_attach,
+		capabilities = require("user.lsp.handlers").capabilities,
+	}
+
+	server = vim.split(server, "@")[1]
+
+	local require_ok, conf_opts = pcall(require, "user.lsp.settings." .. server)
+	if require_ok then
+		opts = vim.tbl_deep_extend("force", conf_opts, opts)
+	end
+
+	lspconfig[server].setup(opts)
+end
diff --git a/nvim/lua/user/lsp/null-ls.lua b/nvim/lua/user/lsp/null-ls.lua
new file mode 100644
index 0000000..874e19c
--- /dev/null
+++ b/nvim/lua/user/lsp/null-ls.lua
@@ -0,0 +1,19 @@
+local null_ls_status_ok, null_ls = pcall(require, "null-ls")
+if not null_ls_status_ok then
+	return
+end
+
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/formatting
+local formatting = null_ls.builtins.formatting
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/diagnostics
+local diagnostics = null_ls.builtins.diagnostics
+
+null_ls.setup({
+	debug = false,
+	sources = {
+		formatting.prettier.with({ extra_args = { "--no-semi", "--single-quote", "--jsx-single-quote" } }),
+		formatting.black.with({ extra_args = { "--fast" } }),
+		formatting.stylua,
+    -- diagnostics.flake8
+	},
+})