First commit

src/setting/config.py

@@ -0,0 +1,29 @@
+import os
+import sys
+from dataclasses import dataclass
+
+
+def env(name: str) -> str:
+    v = os.getenv(name)
+    if not v:
+        print(f"[ERR] env {name} is required.", file=sys.stderr)
+        sys.exit(1)
+    return v.strip()
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    grafana_url: str
+    grafana_api_key: str
+    grafana_dashboard_uid: str
+    mattermost_webhook: str
+
+    @staticmethod
+    def load() -> "AppConfig":
+        url = env("GRAFANA_URL").rstrip("/")
+        return AppConfig(
+            grafana_url=url,
+            grafana_api_key=env("GRAFANA_API_KEY"),
+            grafana_dashboard_uid=env("GRAFANA_DASHBOARD_UID"),
+            mattermost_webhook=env("MATTERMOST_WEBHOOK"),
+        )