feat: resolve provider api keys from env (#4696)

astrbot/core/provider/manager.py

@@ -1,5 +1,6 @@
 import asyncio
 import copy
+import os
 import traceback
 from typing import Protocol, runtime_checkable
 
@@ -406,10 +407,40 @@ class ProviderManager:
                 pc = merged_config
         return pc
 
+    def _resolve_env_key_list(self, provider_config: dict) -> dict:
+        keys = provider_config.get("key", [])
+        if not isinstance(keys, list):
+            return provider_config
+        resolved_keys = []
+        for idx, key in enumerate(keys):
+            if isinstance(key, str) and key.startswith("$"):
+                env_key = key[1:]
+                if env_key.startswith("{") and env_key.endswith("}"):
+                    env_key = env_key[1:-1]
+                if env_key:
+                    env_val = os.getenv(env_key)
+                    if env_val is None:
+                        provider_id = provider_config.get("id")
+                        logger.warning(
+                            f"Provider {provider_id} 配置项 key[{idx}] 使用环境变量 {env_key} 但未设置。",
+                        )
+                        resolved_keys.append("")
+                    else:
+                        resolved_keys.append(env_val)
+                else:
+                    resolved_keys.append(key)
+            else:
+                resolved_keys.append(key)
+        provider_config["key"] = resolved_keys
+        return provider_config
+
     async def load_provider(self, provider_config: dict):
         # 如果 provider_source_id 存在且不为空，则从 provider_sources 中找到对应的配置并合并
         provider_config = self.get_merged_provider_config(provider_config)
 
+        if provider_config.get("provider_type", "") == "chat_completion":
+            provider_config = self._resolve_env_key_list(provider_config)
+
         if not provider_config["enable"]:
             logger.info(f"Provider {provider_config['id']} is disabled, skipping")
             return