The "images" command is a fairly heavyweight command to run as it
involves searching the whole docker file-system inventory. On a
machine with a lot of images this makes start-up fairly expensive.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
commands = [["docker"], ["sudo", "-n", "docker"]]
for cmd in commands:
try:
- if subprocess.call(cmd + ["images"],
+ # docker version will return the client details in stdout
+ # but still report a status of 1 if it can't contact the daemon
+ if subprocess.call(cmd + ["version"],
stdout=DEVNULL, stderr=DEVNULL) == 0:
return cmd
except OSError: