works for now

lua/config/lazy.lua

@@ -48,3 +48,94 @@ require("lazy").setup({
     },
   },
 })
+
+---------------------------
+-------  TEMPORARY  -------
+---------------------------
+-- textDocument/diagnostic support until 0.10.0 is released
+local _timers = {}
+local function setup_diagnostics(client, buffer)
+  if require("vim.lsp.diagnostic")._enable then
+    return
+  end
+
+  local diagnostic_handler = function()
+    local params = vim.lsp.util.make_text_document_params(buffer)
+    client.request("textDocument/diagnostic", { textDocument = params }, function(err, result)
+      if err then
+        local err_msg = string.format("diagnostics error - %s", vim.inspect(err))
+        vim.lsp.log.error(err_msg)
+      end
+      local diagnostic_items = {}
+      if result then
+        diagnostic_items = result.items
+      end
+      vim.lsp.diagnostic.on_publish_diagnostics(
+        nil,
+        vim.tbl_extend("keep", params, { diagnostics = diagnostic_items }),
+        { client_id = client.id }
+      )
+    end)
+  end
+
+  diagnostic_handler() -- to request diagnostics on buffer when first attaching
+
+  vim.api.nvim_buf_attach(buffer, false, {
+    on_lines = function()
+      if _timers[buffer] then
+        vim.fn.timer_stop(_timers[buffer])
+      end
+      _timers[buffer] = vim.fn.timer_start(200, diagnostic_handler)
+    end,
+    on_detach = function()
+      if _timers[buffer] then
+        vim.fn.timer_stop(_timers[buffer])
+      end
+    end,
+  })
+end
+
+-- adds ShowRubyDeps command to show dependencies in the quickfix list.
+-- add the `all` argument to show indirect dependencies as well
+local function add_ruby_deps_command(client, bufnr)
+  vim.api.nvim_buf_create_user_command(bufnr, "ShowRubyDeps", function(opts)
+    local params = vim.lsp.util.make_text_document_params()
+    local showAll = opts.args == "all"
+
+    client.request("rubyLsp/workspace/dependencies", params, function(error, result)
+      if error then
+        print("Error showing deps: " .. error)
+        return
+      end
+
+      local qf_list = {}
+      for _, item in ipairs(result) do
+        if showAll or item.dependency then
+          table.insert(qf_list, {
+            text = string.format("%s (%s) - %s", item.name, item.version, item.dependency),
+
+            filename = item.path,
+          })
+        end
+      end
+
+      vim.fn.setqflist(qf_list)
+      vim.cmd("copen")
+    end, bufnr)
+  end, {
+    nargs = "?",
+    complete = function()
+      return { "all" }
+    end,
+  })
+end
+
+require("lspconfig").ruby_ls.setup({
+  on_attach = function(client, buffer)
+    setup_diagnostics(client, buffer)
+    add_ruby_deps_command(client, buffer)
+  end,
+})
+---------------------------
+-------  TEMPORARY  -------
+---------------------------