fix: new oil buffers are nomodifiable during mutation processing

lua/oil/mutator/init.lua

@@ -431,19 +431,24 @@ M.process_actions = function(actions, cb)
   next_action()
 end
 
+local mutation_in_progress = false
+
 ---@param confirm nil|boolean
 M.try_write_changes = function(confirm)
+  if mutation_in_progress then
+    error("Cannot perform mutation when already in progress")
+    return
+  end
   local current_buf = vim.api.nvim_get_current_buf()
   local was_modified = vim.bo.modified
   local buffers = view.get_all_buffers()
   local all_diffs = {}
   local all_errors = {}
 
-  local was_modifiable = {}
+  mutation_in_progress = true
+  -- Lock the buffer to prevent race conditions from the user modifying them during parsing
+  view.lock_buffers()
   for _, bufnr in ipairs(buffers) do
-    was_modifiable[bufnr] = vim.bo[bufnr].modifiable
-    -- Lock the buffer to prevent race conditions
-    vim.bo[bufnr].modifiable = false
     if vim.bo[bufnr].modified then
       local diffs, errors = parser.parse(bufnr)
       all_diffs[bufnr] = diffs
@@ -453,13 +458,12 @@ M.try_write_changes = function(confirm)
     end
   end
   local function unlock()
-    for _, bufnr in ipairs(buffers) do
-      pcall(vim.api.nvim_buf_set_option, bufnr, "modifiable", was_modifiable[bufnr])
-    end
+    view.unlock_buffers()
     -- The ":write" will set nomodified even if we cancel here, so we need to restore it
     if was_modified then
       vim.bo[current_buf].modified = true
     end
+    mutation_in_progress = false
   end
 
   local ns = vim.api.nvim_create_namespace("Oil")
@@ -500,8 +504,10 @@ M.try_write_changes = function(confirm)
       M.process_actions(
         actions,
         vim.schedule_wrap(function(err)
+          view.unlock_buffers()
           if err then
             vim.notify(string.format("[oil] Error applying actions: %s", err), vim.log.levels.ERROR)
+            view.rerender_all_oil_buffers({ preserve_undo = false })
           else
             local current_entry = oil.get_cursor_entry()
             if current_entry then
@@ -513,6 +519,7 @@ M.try_write_changes = function(confirm)
             end
             view.rerender_all_oil_buffers({ preserve_undo = M.trash })
           end
+          mutation_in_progress = false
         end)
       )
     end)

lua/oil/mutator/progress.lua

@@ -69,7 +69,9 @@ function Progress:close()
     self.timer = nil
   end
   if self.winid then
-    vim.api.nvim_win_close(self.winid, true)
+    if vim.api.nvim_win_is_valid(self.winid) then
+      vim.api.nvim_win_close(self.winid, true)
+    end
     self.winid = nil
   end
 end

lua/oil/view.lua

@@ -103,6 +103,30 @@ M.get_all_buffers = function()
   return vim.tbl_filter(vim.api.nvim_buf_is_loaded, vim.tbl_keys(session))
 end
 
+local buffers_locked = false
+---Make all oil buffers nomodifiable
+M.lock_buffers = function()
+  buffers_locked = true
+  for bufnr in pairs(session) do
+    if vim.api.nvim_buf_is_loaded(bufnr) then
+      vim.bo[bufnr].modifiable = false
+    end
+  end
+end
+
+---Restore normal modifiable settings for oil buffers
+M.unlock_buffers = function()
+  buffers_locked = false
+  for bufnr in pairs(session) do
+    if vim.api.nvim_buf_is_loaded(bufnr) then
+      local adapter = util.get_adapter(bufnr)
+      if adapter then
+        vim.bo[bufnr].modifiable = adapter.is_modifiable(bufnr)
+      end
+    end
+  end
+end
+
 ---@param opts table
 ---@note
 --- This DISCARDS ALL MODIFICATIONS a user has made to oil buffers
@@ -350,7 +374,7 @@ local function render_buffer(bufnr, opts)
   })
   local scheme = util.parse_url(bufname)
   local adapter = util.get_adapter(bufnr)
-  if not adapter then
+  if not scheme or not adapter then
     return false
   end
   local entries = cache.list_url(bufname)
@@ -539,7 +563,7 @@ M.render_buffer_async = function(bufnr, opts, callback)
     if not preserve_undo then
       vim.bo[bufnr].undolevels = vim.api.nvim_get_option("undolevels")
     end
-    vim.bo[bufnr].modifiable = adapter.is_modifiable(bufnr)
+    vim.bo[bufnr].modifiable = not buffers_locked and adapter.is_modifiable(bufnr)
     if callback then
       callback()
     end