refactor: less code for cache

lua/lazy/core/cache.lua

@@ -1,14 +1,13 @@
 -- Simple string cache with fast saving and loading from file
 local M = {}
 
-local cache_path = vim.fn.stdpath("state") .. "/lazy/plugins.state"
+M.dirty = false
----@type string
-local cache_hash = nil
-local dirty = false
 
+local cache_path = vim.fn.stdpath("state") .. "/lazy.state"
+---@type string
+local cache_hash = ""
 ---@type table<string,boolean>
 local used = {}
-
 ---@type table<string,string>
 local cache = {}
 
@@ -23,24 +22,12 @@ end
 function M.set(key, value)
   cache[key] = value
   used[key] = true
-  dirty = true
+  M.dirty = true
 end
 
 function M.del(key)
   cache[key] = nil
-  dirty = true
+  M.dirty = true
-end
-
-function M.dirty()
-  dirty = true
-end
-
-function M.use(pattern)
-  for key, _ in pairs(cache) do
-    if key:find(pattern) then
-      used[key] = true
-    end
-  end
 end
 
 function M.hash(file)
@@ -56,7 +43,7 @@ function M.setup()
     callback = function()
       vim.api.nvim_create_autocmd("VimLeavePre", {
         callback = function()
-          if dirty then
+          if M.dirty then
             local hash = M.hash(cache_path)
             -- abort when the file was changed in the meantime
             if hash == nil or cache_hash == hash then
@@ -70,10 +57,9 @@ function M.setup()
 end
 
 function M.save()
-  require("lazy.core.state").save()
+  require("lazy.core.plugin").save()
   require("lazy.core.module").save()
 
-  vim.fn.mkdir(vim.fn.fnamemodify(cache_path, ":p:h"), "p")
   local f = assert(io.open(cache_path, "wb"))
   for key, value in pairs(cache) do
     if used[key] then