fix: error when editing a dir, and still missing parent window (#40)

lua/oil/init.lua

@@ -673,11 +673,13 @@ M.setup = function(opts)
     callback = function()
       local util = require("oil.util")
       local view = require("oil.view")
-      local scheme = util.parse_url(vim.api.nvim_buf_get_name(0))
+      local bufname = vim.api.nvim_buf_get_name(0)
+      local scheme = util.parse_url(bufname)
       if scheme and config.adapters[scheme] then
         view.maybe_set_cursor()
-      else
+      elseif vim.fn.isdirectory(bufname) == 0 then
-        -- Only run this logic if we are *not* in an oil buffer.
+        -- Only run this logic if we are *not* in an oil buffer (and it's not a directory, which
+        -- will be replaced by an oil:// url)
         -- Oil buffers have to run it in BufReadCmd after confirming they are a directory or a file
         restore_alt_buf()
       end

lua/oil/util.lua

@@ -127,12 +127,14 @@ M.rename_buffer = function(src_bufnr, dest_buf_name)
         end
       end
     end
+    if vim.api.nvim_buf_is_valid(src_bufnr) then
       if vim.bo[src_bufnr].modified then
         local src_lines = vim.api.nvim_buf_get_lines(src_bufnr, 0, -1, true)
         vim.api.nvim_buf_set_lines(dest_bufnr, 0, -1, true, src_lines)
       end
       -- Try to delete, but don't if the buffer has changes
       pcall(vim.api.nvim_buf_delete, src_bufnr, {})
+    end
   end)
   return true
 end