feat: LSP for Luau and diagnostics keymap

.config/nvim/lua/null/lsp-diagnostics.lua

@@ -0,0 +1,57 @@
+-- REF: https://github.com/lukas-reineke/dotfiles/blob/master/vim/lua/lsp/diagnostics.lua
+
+local M = {}
+
+local serverity_map = {
+    "DiagnosticError",
+    "DiagnosticWarn",
+    "DiagnosticInfo",
+    "DiagnosticHint",
+}
+local icon_map = {
+    "  ",
+    "  ",
+    "  ",
+    "  ",
+}
+
+local function source_string(source, code)
+    if code then
+        return string.format("  [%s %s]", source, code)
+    else
+        return string.format("  [%s]", source)
+    end
+end
+
+M.line_diagnostics = function()
+    local bufnr, lnum = unpack(vim.fn.getcurpos())
+    local diagnostics = vim.diagnostic.get(bufnr, { lnum = lnum - 1, })
+    if vim.tbl_isempty(diagnostics) then
+        return
+    end
+
+    local lines = {}
+
+    for _, diagnostic in ipairs(diagnostics) do
+        table.insert(
+            lines,
+            icon_map[diagnostic.severity]
+                .. " "
+                .. diagnostic.message:gsub("\n", " ")
+                .. source_string(diagnostic.source, diagnostic.code)
+        )
+    end
+
+    local floating_bufnr, _ = vim.lsp.util.open_floating_preview(lines, "plaintext", {
+        border = vim.g.floating_window_border_dark,
+        focus_id = "line",
+    })
+
+    for i, diagnostic in ipairs(diagnostics) do
+        local message_length = #lines[i] - #source_string(diagnostic.source, diagnostic.code)
+        vim.api.nvim_buf_add_highlight(floating_bufnr, -1, serverity_map[diagnostic.severity], i - 1, 0, message_length)
+        vim.api.nvim_buf_add_highlight(floating_bufnr, -1, "DiagnosticSource", i - 1, message_length, -1)
+    end
+end
+
+return M