wip START

lua/telescope/finders/executor.lua

@@ -0,0 +1,57 @@
+local uv = vim.loop
+
+local modes = setmetatable({
+  init = "init",
+  next = "next",
+  done = "done",
+}, { __index = function(_, k)
+  error(string.format("'%s' is not a valid mode", k))
+end })
+
+local Executor = {}
+Executor.__index = Executor
+
+function Executor:new()
+  return setmetatable({
+    tasks = {},
+    mode = modes.next,
+    index = 1,
+    _idle = nil,
+  }, self)
+end
+
+function Executor:run()
+  if not self._idle then
+    self._idle = uv.new_idle()
+  end
+
+  self._idle:start(function()
+    if #self.tasks == 0 then
+      return self:stop()
+    end
+
+    if self.mode == modes.init 
+        or self.mode == modes.next then
+      self:step()
+    elseif self.mode == modes.done then
+      self:complete()
+    else
+      error(debug.traceback("Unknown mode: " .. tostring(self.mode)))
+    end
+  end)
+end
+
+function Executor:complete()
+end
+
+function Executor:step()
+  if #self.tasks == 0 then return end
+end
+
+function Executor:stop()
+  self._idle:stop()
+  self._idle:close()
+  self._idle = nil
+
+  return self
+end