1 files changed, 23 insertions, 0 deletions
diff --git a/python/mozbuild/mozbuild/buildversion.py b/python/mozbuild/mozbuild/buildversion.py
new file mode 100644
index 0000000000..a0a767ab82
--- /dev/null
+++ b/python/mozbuild/mozbuild/buildversion.py
@@ -0,0 +1,23 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import os
+from pathlib import Path
+
+from packaging.version import Version
+
+
+def mozilla_build_version():
+    mozilla_build = os.environ.get("MOZILLABUILD")
+
+    version_file = Path(mozilla_build) / "VERSION"
+
+    assert version_file.exists(), (
+        f'The MozillaBuild VERSION file was not found at "{version_file}".\n'
+        "Please check if MozillaBuild is installed correctly and that the"
+        "`MOZILLABUILD` environment variable is to the correct path."
+    )
+
+    with version_file.open() as file:
+        return Version(file.readline().rstrip("\n"))