Work around Python bug, appending to a FIFO in python >=3 <3.8 is broken

(https://bugs.python.org/issue27805).

No issue #

Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward@curii.com>

diff --git a/sdk/python/tests/run_test_server.py b/sdk/python/tests/run_test_server.py
index f4c1230cc8cf9ef30004cec3954ea52b9bc31e12..358608d63c5718f2161973808e0233bc5f6b74a8 100644 (file)
--- a/sdk/python/tests/run_test_server.py
+++ b/sdk/python/tests/run_test_server.py
@@ -327,7 +327,10 @@ def run(leave_running_atexit=False):
     env.pop('ARVADOS_API_HOST', None)
     env.pop('ARVADOS_API_HOST_INSECURE', None)
     env.pop('ARVADOS_API_TOKEN', None)
-    logf = open(_logfilename('railsapi'), 'a')
+    if not os.environ.get('ARVADOS_DEBUG', ''):
+        logf = open(_logfilename('railsapi'), 'a')
+    else:
+        logf = open(_logfilename('railsapi'), 'w')
     railsapi = subprocess.Popen(
         ['bundle', 'exec',
          'passenger', 'start', '-p{}'.format(port),