Find local Git branches that haven't got remotes

find_local_only_branches.py

import os
import subprocess

# only look in home and subdirectories
home_dir = os.path.expanduser('~')
git_repos = [root for root, dirs, _ in os.walk(home_dir) if '.git' in dirs ]

row_format = '{:30s} {:40s} ({})'
print(row_format.format('Repository', 'Branch', 'Path'))

def cd_run_report(directory, commands):
    os.chdir(directory)
    process = subprocess.Popen(commands, stdout=subprocess.PIPE)
    return (process.communicate())

for repo in git_repos:
    
    # list all the local branches in the repository
    commands = ['git', 'branch']
    out, err = cd_run_report(repo, commands)
    
    if err:
        print('Error: {}'.format(err))
        break;
    
    # ignore first 2 chars (either whitespace or *) and ignore final empty string
    branches = [ branch[2:].strip() for branch in out.split('\n') ][:-1]
    
    # check each branch for its remote
    for branch in branches:
        commands = ['git', 'rev-parse', '--symbolic-full-name', branch + '@{u}']
        out, err = cd_run_report(repo, commands)
        
        remote_branch = out.strip()
        
        if not remote_branch:
            print(row_format.format(repo.split(os.sep)[-1], branch, repo))