intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 29 insertions, 0 deletions

diff --git a/build/scripts/retry.py b/build/scripts/retry.py
new file mode 100644
index 00000000000..d14170bfec1
--- /dev/null
+++ b/build/scripts/retry.py
@@ -0,0 +1,29 @@
+import time
+import functools
+
+
+# Partly copy-pasted from contrib/python/retry
+def retry_func(f, exceptions=Exception, tries=-1, delay=1, max_delay=None, backoff=1):
+    _tries, _delay = tries, delay
+    while _tries:
+        try:
+            return f()
+        except exceptions as e:
+            _tries -= 1
+            if not _tries:
+                raise
+
+            time.sleep(_delay)
+            _delay *= backoff
+
+            if max_delay is not None:
+                _delay = min(_delay, max_delay)
+
+
+def retry(**retry_kwargs):
+    def decorator(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kwargs):
+            return retry_func(lambda: func(*args, **kwargs), **retry_kwargs)
+        return wrapper
+    return decorator