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-rwxr-xr-xtests/docker/docker.py13
1 files changed, 7 insertions, 6 deletions
diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index c9f20d8d09..356d7618f1 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -24,7 +24,7 @@ import tempfile
import re
import signal
from tarfile import TarFile, TarInfo
-from io import StringIO
+from io import StringIO, BytesIO
from shutil import copy, rmtree
from pwd import getpwuid
from datetime import datetime, timedelta
@@ -541,13 +541,14 @@ class UpdateCommand(SubCommand):
# Create a Docker buildfile
df = StringIO()
- df.write("FROM %s\n" % args.tag)
- df.write("ADD . /\n")
- df.seek(0)
+ df.write(u"FROM %s\n" % args.tag)
+ df.write(u"ADD . /\n")
+
+ df_bytes = BytesIO(bytes(df.getvalue(), "UTF-8"))
df_tar = TarInfo(name="Dockerfile")
- df_tar.size = len(df.buf)
- tmp_tar.addfile(df_tar, fileobj=df)
+ df_tar.size = df_bytes.getbuffer().nbytes
+ tmp_tar.addfile(df_tar, fileobj=df_bytes)
tmp_tar.close()