Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Python Script to Delete Merged Git Branches

DZone's Guide to

Python Script to Delete Merged Git Branches

· DevOps Zone ·
Free Resource

Learn more about how CareerBuilder was able to resolve customer issues 5x faster by using Scalyr, the fastest log management tool on the market. 

One of the great things about git is how fast it is. You can create a new branch, or switch to another branch, almost as fast as you can type the command. This tends to lower the impedance of branching. As a result, many individuals and teams will naturally converge on a process where they create many, many branches.

If you’re like me, you may have 30 branches at any given time. This can make viewing all the branches unwieldy. Once I week or so, I would go on a branch deletion spree by manually copying and pasting multiple branch names into a git branch -D statement.

The basic use case is that you want to delete any branches that are already merged into master. Here is a python script that automated just that.

from subprocess import check_output
import sys


def get_merged_branches():
    ''' a list of merged branches, not couting the current branch or master '''
    raw_results = check_output('git branch --merged upstream/master', shell=True)
    return [b.strip() for b in raw_results.split('\n')
        if b.strip() and not b.startswith('*') and b.strip() != 'master']


def delete_branch(branch):
    return check_output('git branch -D %s' % branch, shell=True).strip()


if __name__ == '__main__':
    dry_run = '--confirm' not in sys.argv
    for branch in get_merged_branches():
        if dry_run:
            print branch
        else:
            print delete_branch(branch)
    if dry_run:
        print '*****************************************************************'
        print 'Did not actually delete anything yet, pass in --confirm to delete'
        print '*****************************************************************'

To print the branches that would be deleted, just execute python delete_merged_branches.py. To actually delete the branches, execute python delete_merged_branches.py --confirm.

Find out more about how Scalyr built a proprietary database that does not use text indexing for their log management tool.

Topics:

Published at DZone with permission of

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}