Function main

update-exercise-branch.py:24–35

(chapter)

def main(chapter):
    exercise_chapter = f'{chapter}_exercise'
    assert exercise_chapter in all_branches

    run(['git', 'checkout', exercise_chapter])
    commits = list(reversed(run([
        'git', 'log', '--pretty=%h',
        f'{exercise_chapter}^{{/{chapter}_ends}}..{exercise_chapter}',
    ]).split()))
    run(['git', 'reset', '--hard', chapter])
    run(['git', 'cherry-pick', *commits])
    run(['git', 'checkout', 'master'])

if __name__ == '__main__':
    main(sys.argv[1])