feat: do not close preview when cd into dir

lua/oil/init.lua

@@ -529,6 +529,7 @@ M.select = function(opts, callback)
     vim.api.nvim_win_close(preview_win, true)
   end
   local prev_win = vim.api.nvim_get_current_win()
+  local keep_preview_alive
 
   local scheme, dir = util.parse_url(bufname)
   assert(scheme and dir)
@@ -602,6 +603,14 @@ M.select = function(opts, callback)
         vim.bo[filebufnr].buflisted = true
       end
 
+      -- If a preview window is open, and we are selecting a directory,
+      -- persist the preview window
+      if not opts.preview and preview_win then
+        if vim.endswith(normalized_url, "/") then
+          keep_preview_alive = true
+        end
+      end
+
       local cmd
       if opts.preview and preview_win then
         vim.api.nvim_set_current_win(preview_win)
@@ -643,6 +652,9 @@ M.select = function(opts, callback)
         M.close()
       end)
     end
+    if keep_preview_alive then
+      M.select({preview = true})
+    end
     finish()
   end)
 end

lua/oil/view.lua

@@ -426,6 +426,31 @@ M.initialize = function(bufnr)
     end,
   })
 
+  vim.api.nvim_create_autocmd("BufWinEnter", {
+    desc = "Update preview window when displaying a buffer",
+    group = "Oil",
+    buffer = bufnr,
+    callback = function()
+      local oil = require("oil")
+      if vim.wo.previewwindow then
+        return
+      end
+
+      if vim.api.nvim_get_current_buf() ~= bufnr then
+        return
+      end
+      local entry = oil.get_cursor_entry()
+      if entry then
+        local preview_win_id = util.get_preview_win()
+        if preview_win_id then
+          if entry.id ~= vim.w[preview_win_id].oil_entry_id then
+            oil.select({ preview = true })
+          end
+        end
+      end
+    end,
+  })
+
   -- Watch for TextChanged and update the trash original path extmarks
   local adapter = util.get_adapter(bufnr)
   if adapter and adapter.name == "trash" then