How to catch command line print output of git bash when calling from python?

Asked Oct 27 '20 at 10:18

Active Oct 27 '20 at 11:17

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Suppose I have 3 text files ours.txt, base.txt and theirs.txt and want to do a three way merge on them. When I call git merge-file -p ours.txt base.txt theirs.txt in Git Bash, it will print the merged text.

Whereas, when I run

import subprocess

dir = "path/to/text files"
cmd = ["git", "merge-file", "-p ", "ours.txt", "base.txt", "theirs.txt"]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, cwd=dir)

I can access stdout and stderr through

(out, error) = p.communicate()

But can't seem to store the merged text that gets printed in Git Bash in a variable.

Does anybody have any ideas on how to retrieve it?

Thanks in advance.

asked Oct 27 '20 at 10:18

Benjamin4991

You can get the text read into a file with var=$(git merge-file -p ours.txt base.txt theirs.txt) – Raman Sailopal Oct 27 '20 at 10:48
That would be a variable in git BASH, right? – Benjamin4991 Oct 27 '20 at 12:07
your code works on my machine (python 3.8.5, linux). What python/OS are you running ? – LeGEC Oct 27 '20 at 13:56
Python 3.8.5, Windows 10. – Benjamin4991 Oct 27 '20 at 14:34
what happens if you *don't* capture stdout ? does the expected output get printed on the console you run your python program from ? – LeGEC Oct 27 '20 at 17:10

How to catch command line print output of git bash when calling from python?

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