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app/settings_utils.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+import os
+from datetime import date
+
+from app.logging import Ansi
+from app.logging import log
+
+
+def read_bool(value: str) -> bool:
+    return value.lower() in ("true", "1", "yes")
+
+
+def read_list(value: str) -> list[str]:
+    return [v.strip() for v in value.split(",")]
+
+
+def support_deprecated_vars(
+    new_name: str,
+    deprecated_name: str,
+    *,
+    until: date,
+    allow_empty_string: bool = False,
+) -> str:
+    val1 = os.getenv(new_name)
+    if val1:
+        return val1
+
+    val2 = os.getenv(deprecated_name)
+    if val2:
+        if until < date.today():
+            raise ValueError(
+                f'The "{deprecated_name}" config option has been deprecated as of {until.isoformat()} and is no longer supported. Use {new_name} instead.',
+            )
+
+        log(
+            f'The "{deprecated_name}" config option has been deprecated and will be supported until {until.isoformat()}. Use {new_name} instead.',
+            Ansi.LYELLOW,
+        )
+        return val2
+
+    if allow_empty_string:
+        if val1 is not None:
+            return val1
+        if val2 is not None:
+            return val2
+
+    raise KeyError(f"{new_name} is not set in the environment")