Python Create Timeout for subprocess

Question

I'm writing a Python script that will refresh a Git repository, then build it.
The script is to be run daily (e.g. running on a daily build server).

The issue is that git commands to our server sometimes never complete (ok, I terminate the processes after 10 minutes or more).

I would like to set a Timeout for the subprocess (and probably put into a retry loop).
How do I set up the Timeout for a subprocess.

Here's my code so far:

#------------------------------------------------------------------------------
#   Script to daily build Voyant 3
#------------------------------------------------------------------------------
import subprocess
import os

#------------------------------------------------------------------------------
#   Main program starts here.
#------------------------------------------------------------------------------
repo_dir = "c:/sandboxes/git/voyant-3"

#------------------------------------------------------------------------------
#   Change to repo (repository) folder.
#------------------------------------------------------------------------------
os.chdir(repo_dir);

#------------------------------------------------------------------------------
#   Refresh the repo (sandbox)
#------------------------------------------------------------------------------
subprocess.run(["git", "fetch", "--all]"]);

Notes:

Using Python 27 (preferred) or Python 36
Using Windows 10 (The script will be registered as a service on the PC)
Research on using PyGit is not impressive; most Users say to use Python Subprocess.
From the Python documentation: (https://docs.python.org/3/library/subprocess.html):

subprocess.run(args, *, stdin=None, input=None, stdout=None, stderr=None, capture_output=False, shell=False, cwd=None, timeout=None, check=False, encoding=None, errors=None, text=None, env=None, universal_newlines=None, **other_popen_kwargs)

set timeout parameter and catch the TimeoutExpired error? — Jan Wilamowski
– Jan Wilamowski, Commented Jul 7, 2021 at 3:26
As an alternative, you could use the timeout command, which can also do the "TERM, then KILL" sequence; subprocess.run(["timeout", "-k30", "600", "git", "fetch", "--all"]) — Jiří Baum
– Jiří Baum, Commented Jul 7, 2021 at 7:22

Fractal · Accepted Answer · 2021-07-07 07:19:28Z

3

while True:
    try: subprocess.run(["git", "fetch", "--all"], timeout=600);
    except subprocess.TimeoutExpired: continue
    break

answered Jul 7, 2021 at 7:19

Fractal

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