Get contributors for each file using git shortlog in python subprocesses

Question

I've got a problem, when I'm trying to obtain output of following command: git shortlog -s -- [file_path] using python 3.6 subprocess module.

Here the code:

import subprocess

x = subprocess.Popen(['git shortlog -s -- ' + file_path], cwd=path, 
shell=True, stdin=subprocess.PIPE, 
stdout=subprocess.PIPE).communicate()[0]
print(x)

The result of execution is empty. What had I done wrong?

Answer 1

you need to call git shortlog HEAD

subprocess.Popen(['git shortlog HEAD -s -- ' + file_path],
                  cwd=path,  shell=True, stdin=subprocess.PIPE, 
                  stdout=subprocess.PIPE).communicate()[0]

To learn why, see https://stackoverflow.com/a/43042420/4381942