Update web-platform-tests to revision 00fa50687cab43b660296389acad6cc48717f1d1

tests/wpt/web-platform-tests/tools/docker/retry.py

@@ -0,0 +1,58 @@
+#! /usr/bin/env python
+import argparse
+import subprocess
+import time
+import sys
+
+
+def get_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--delay", action="store", type=float, default=3, help="Initial delay before retry, in seconds")
+    parser.add_argument("--count", action="store", type=int, default=5, help="Total number of tries")
+    parser.add_argument("--factor", action="store", type=float, default=2, help="Exponential backoff factor")
+    parser.add_argument("cmd", nargs=argparse.REMAINDER)
+    return parser
+
+
+def iter_range(n):
+    i = 0
+    while i < n:
+        yield i
+        i += 1
+
+
+def main():
+    args = get_args().parse_args()
+
+    if not args.cmd:
+        print("No command supplied")
+        sys.exit(1)
+
+    retcode = None
+
+    for n in iter_range(args.count):
+        try:
+            print("Running %s [try %d/%d]" % (" ".join(args.cmd), (n+1), args.count))
+            subprocess.check_call(args.cmd)
+        except subprocess.CalledProcessError as e:
+            retcode = e.returncode
+        else:
+            print("Command succeeded")
+            retcode = 0
+            break
+
+        if args.factor == 0:
+            wait_time = (n+1) * args.delay
+        else:
+            wait_time = args.factor**n * args.delay
+        if n < args.count - 1:
+            print("Command failed, waiting %s seconds to retry" % wait_time)
+            time.sleep(wait_time)
+        else:
+            print("Command failed, out of retries")
+
+    sys.exit(retcode)
+
+
+if __name__ == "__main__":
+    main()