[PATCH 2/8] docker.py/build: support binary files in --extra-files

[Paolo Bonzini]

Read the --extra-files in binary mode to avoid encoding errors.

Signed-off-by: Paolo Bonzini <address@hidden>
---
 tests/docker/docker.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index ad61747bae..85e1dda10f 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -56,15 +56,19 @@ class EngineEnum(enum.IntEnum):
 
 USE_ENGINE = EngineEnum.AUTO
 
+def _bytes_checksum(bytes):
+    """Calculate a digest string unique to the text content"""
+    return hashlib.sha1(bytes).hexdigest()
+
 def _text_checksum(text):
     """Calculate a digest string unique to the text content"""
-    return hashlib.sha1(text.encode('utf-8')).hexdigest()
+    return _bytes_checksum(text.encode('utf-8'))
 
 def _read_dockerfile(path):
     return open(path, 'rt', encoding='utf-8').read()
 
 def _file_checksum(filename):
-    return _text_checksum(_read_dockerfile(filename))
+    return _bytes_checksum(open(filename, 'rb').read())
 
 
 def _guess_engine_command():
-- 
2.18.2