add gemini compat class

Author: leafo

lua-openai-dev-1.rockspec

@@ -25,6 +25,7 @@ build = {
    modules = {
       ["openai"] = "openai/init.lua",
       ["openai.chat_completions"] = "openai/chat_completions.lua",
-      ["openai.responses"] = "openai/responses.lua"
+      ["openai.responses"] = "openai/responses.lua",
+      ["openai.compat.gemini"] = "openai/compat/gemini.lua"
    }
 }

openai/compat/gemini.lua

@@ -0,0 +1,47 @@
+local OpenAI
+OpenAI = require("openai").OpenAI
+local Gemini
+do
+  local _class_0
+  local _parent_0 = OpenAI
+  local _base_0 = {
+    api_base = "https://generativelanguage.googleapis.com/v1beta/openai",
+    default_model = "gemini-2.5-flash"
+  }
+  _base_0.__index = _base_0
+  setmetatable(_base_0, _parent_0.__base)
+  _class_0 = setmetatable({
+    __init = function(self, ...)
+      return _class_0.__parent.__init(self, ...)
+    end,
+    __base = _base_0,
+    __name = "Gemini",
+    __parent = _parent_0
+  }, {
+    __index = function(cls, name)
+      local val = rawget(_base_0, name)
+      if val == nil then
+        local parent = rawget(cls, "__parent")
+        if parent then
+          return parent[name]
+        end
+      else
+        return val
+      end
+    end,
+    __call = function(cls, ...)
+      local _self_0 = setmetatable({}, _base_0)
+      cls.__init(_self_0, ...)
+      return _self_0
+    end
+  })
+  _base_0.__class = _class_0
+  if _parent_0.__inherited then
+    _parent_0.__inherited(_parent_0, _class_0)
+  end
+  Gemini = _class_0
+end
+return {
+  Gemini = Gemini,
+  new = Gemini
+}