call svn as a subprocess to check out source code and expect returns

Question

hi, guys,

if i use python write a script to call svn as a subprocess to checkout source code, e.g.

p = subprocess.Popen("svn checkout file:///tmp/repos/test mine"),

what is the return value of the success or failure of svn-checkout subprocess?

Thanks

Answer 1

Have you read the docs about Subprocess ?

 returnCode = p.returncode

This will contain the return code of the svn call.

Answer 2

According to this Python 2.7 spec, calling Popen.wait() or Popen.poll() sets the Popen.returncode attribute. I guess you can try:

p = subprocess.Popen("svn checkout file:///tmp/repos/test mine")
p.wait() # this deadlocks the thread until process completion, so use with care

# There was an error
if p.returncode != 0:
   # ...

According to the spec:

The child return code, set by poll() and wait() (and indirectly by communicate()). A None value indicates that the process hasn’t terminated yet. A negative value -N indicates that the child was terminated by signal N (Unix only).