feat(extra): add flag 'current_dir' to oldfiles() picker

doc/mini-extra.txt

@@ -640,7 +640,9 @@ Pick from |v:oldfiles| entries representing readable files.
 
 Parameters ~
 {local_opts} `(table|nil)` Options defining behavior of this particular picker.
-  Not used at the moment.
+  Possible fields:
+  - <current_dir> `(boolean|nil)` - whether to return files only from
+    current working directory and its subdirectories. Default: `false`.
 {opts} `(table|nil)` Options forwarded to |MiniPick.start()|.
 
 Return ~

lua/mini/extra.lua

@@ -1151,20 +1151,28 @@ end
 --- Pick from |v:oldfiles| entries representing readable files.
 ---
 ---@param local_opts __extra_pickers_local_opts
----   Not used at the moment.
+---   Possible fields:
+---   - <current_dir> `(boolean|nil)` - whether to return files only from
+---     current working directory and its subdirectories. Default: `false`.
 ---@param opts __extra_pickers_opts
 ---
 ---@return __extra_pickers_return
 MiniExtra.pickers.oldfiles = function(local_opts, opts)
   local pick = H.validate_pick('oldfiles')
+  local_opts = vim.tbl_deep_extend('force', { current_dir = false }, local_opts or {})
   local oldfiles = vim.v.oldfiles
   if not H.islist(oldfiles) then H.error('`pickers.oldfiles` picker needs valid `v:oldfiles`.') end
 
+  local show_all = not local_opts.current_dir
+  local sep = vim.loop.os_uname().sysname == 'Windows_NT' and [[%\]] or '%/'
   local items = vim.schedule_wrap(function()
     local cwd = pick.get_picker_opts().source.cwd
+    local cwd_pattern = '^' .. vim.pesc(cwd) .. sep
     local res = {}
     for _, path in ipairs(oldfiles) do
-      if vim.fn.filereadable(path) == 1 then table.insert(res, H.short_path(path, cwd)) end
+      if vim.fn.filereadable(path) == 1 and (show_all or path:find(cwd_pattern) ~= nil) then
+        table.insert(res, H.short_path(path, cwd))
+      end
     end
     pick.set_picker_items(res)
   end)

tests/test_extra.lua

@@ -2684,6 +2684,18 @@ T['pickers']['oldfiles()']['respects `opts.source.cwd`'] = function()
   expect.match(items[2], vim.pesc(child.fn.fnamemodify(ref_oldfiles[2], ':~')))
 end
 
+T['pickers']['oldfiles()']['respects `local_opts.current_dir'] = function()
+  child.set_size(10, 70)
+  local ref_oldfiles = { full_path(real_file('LICENSE')), full_path(make_testpath('mocks', 'diagnostic.lua')) }
+  child.v.oldfiles = ref_oldfiles
+
+  pick_oldfiles({ current_dir = true }, { source = { cwd = real_files_dir } })
+  local items = get_picker_items()
+  -- - Only paths inside `cwd` are shown
+  eq(#items, 1)
+  eq(items[1], 'LICENSE')
+end
+
 T['pickers']['options()'] = new_set()
 
 local pick_options = forward_lua_notify('MiniExtra.pickers.options')