Problem with split a cmd string in python

Question

The cmd.split() does not work:

cmd = f'git log --all --grep="fixed bug" --pretty="%H|%an"'
process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)

Generate this error:

With this code instead it works.

cmd = f'git log --reverse --pretty=format:"%H|%an|%at"'

It is not a problem of "bugs" because leaving only "fixed" does not generate anything. In addition, these 2 words are present in commits. I’m afraid it’s a "–grepp" problem.

Asked By: Marriv99

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Source

Answer 1

Split, splits using spaces as separators.

In [2]: cmd = f'git log --all --grep="fixed bug" --pretty="%H|%an"'

In [3]: cmd.split()
Out[3]: ['git', 'log', '--all', '--grep="fixed', 'bug"', '--pretty="%H|%an"']

So the command that gets executed is something like:

git log --all --grep=fixed bug --pretty="%H|%an"

which is not valid since ‘fixed bug’ are taken as 2 different arguments

The preferred solution seems to be using shlex.split function instead that takes this into account.

In [5]: shlex.split(cmd)
Out[5]: ['git', 'log', '--all', '--grep=fixed bug', '--pretty=%H|%an']

Answered By: Gonzalo Matheu

Problem with split a cmd string in python

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