Initial curated EventLens source from 0d80d3b38dfb817285481665b9e71e4b8a0656a0

backend/app/version.py

@@ -0,0 +1,25 @@
+import os
+import re
+from pathlib import Path
+
+_VERSION_PATTERN = re.compile(r"^\d+\.\d+\.\d+(?:[-+][0-9A-Za-z.-]+)?$")
+_REVISION_PATTERN = re.compile(r"^[0-9a-f]{40}$")
+_VERSION_FILE = Path(__file__).resolve().parents[2] / "VERSION"
+LOCAL_REVISION = "local"
+
+
+def read_version() -> str:
+    value = _VERSION_FILE.read_text(encoding="utf-8").strip()
+    if not _VERSION_PATTERN.fullmatch(value):
+        raise RuntimeError("Invalid EventLens VERSION file")
+    return value
+
+
+def read_revision() -> str:
+    value = os.environ.get("EVENTLENS_REVISION", "")
+    if _REVISION_PATTERN.fullmatch(value):
+        return value
+    return LOCAL_REVISION
+
+
+VERSION = read_version()