fix: type annotations and type errors

lua/oil/mutator/init.lua

@@ -184,8 +184,9 @@ M.enforce_action_order = function(actions)
   --   a. TODO optimization: check immediate parents to see if they have no dependencies now
   -- 5. repeat
 
-  -- Gets the dependencies of a particular action. Effectively dynamically calculates the dependency
-  -- "edges" of the graph.
+  ---Gets the dependencies of a particular action. Effectively dynamically calculates the dependency
+  ---"edges" of the graph.
+  ---@param action oil.Action
   local function get_deps(action)
     local ret = {}
     if action.type == "delete" then
@@ -357,7 +358,9 @@ M.process_actions = function(actions, cb)
       if v.type == "delete" then
         local scheme, path = util.parse_url(v.url)
         if config.adapters[scheme] == "files" then
-          actions[i] = {
+          assert(path)
+          ---@type oil.MoveAction
+          local move_action = {
             type = "move",
             src_url = v.url,
             entry_type = v.entry_type,
@@ -366,6 +369,7 @@ M.process_actions = function(actions, cb)
               math.random(999999)
             ),
           }
+          actions[i] = move_action
         end
       end
     end
@@ -439,6 +443,7 @@ M.process_actions = function(actions, cb)
       end
     end)
     if action.type == "change" then
+      ---@cast action oil.ChangeAction
       columns.perform_change_action(adapter, action, callback)
     else
       adapter.perform_action(action, callback)

lua/oil/mutator/preview.lua

@@ -76,6 +76,7 @@ M.show = vim.schedule_wrap(function(actions, should_confirm, cb)
     local adapter = util.get_adapter_for_action(action)
     local line
     if action.type == "change" then
+      ---@cast action oil.ChangeAction
       line = columns.render_change_action(adapter, action)
     else
       line = adapter.render_action(action)

lua/oil/mutator/progress.lua

@@ -169,6 +169,7 @@ function Progress:set_action(action, idx, total)
   local adapter = util.get_adapter_for_action(action)
   local change_line
   if action.type == "change" then
+    ---@cast action oil.ChangeAction
     change_line = columns.render_change_action(adapter, action)
   else
     change_line = adapter.render_action(action)

lua/oil/mutator/trie.lua

@@ -1,6 +1,10 @@
 local util = require("oil.util")
+
+---@class oil.Trie
+---@field private root table
 local Trie = {}
 
+---@return oil.Trie
 Trie.new = function()
   return setmetatable({
     root = { values = {}, children = {} },
@@ -13,6 +17,7 @@ end
 ---@return string[]
 function Trie:_url_to_path_pieces(url)
   local scheme, path = util.parse_url(url)
+  assert(path)
   local pieces = vim.split(path, "/")
   table.insert(pieces, 1, scheme)
   return pieces
@@ -131,7 +136,7 @@ end
 ---Add all actions at a specific path
 ---@param url string
 ---@param ret oil.InternalEntry[]
----@param filter nil|fun(entry: oil.InternalEntry): boolean
+---@param filter? fun(entry: oil.InternalEntry): boolean
 function Trie:accum_actions_at(url, ret, filter)
   local pieces = self:_url_to_path_pieces(url)
   local current = self.root