Quick script to delete old branches

old-branches.py

#!/usr/bin/env python3
import sys
import subprocess
from datetime import datetime, timezone

try:
  date = sys.argv[1]
  yyyy,mm,dd = date.split("-")
except Exception:
    print(f"Missing data argument, usage {__file__} YYYY-MM-DD")
    sys.exit()

if any(var is None for var in (yyyy, dd, mm)):
    print(f"Missing data argument, usage {__file__} YYYY-MM-DD")
    sys.exit()

print(f"Searching for branches older than {mm}/{dd}/{yyyy}")

def get_remote_branches_by_date(remote):
    # Get the list of remote branches
    output = subprocess.check_output(['git', 'ls-remote', '--heads', remote]).decode('utf-8').split('\n')

    branches_by_date = []

    # Iterate over the remote branches
    for line in output:
        if not line.strip():
            continue
        # print("line: " + line)
        commit_hash, branch_ref = line.split('\t')
        branch_name = branch_ref.split('refs/heads/')[-1]
        # print(f"  commit_hash: {commit_hash}")
        # Get the date of the last commit in the branch
        last_commit_date_output = subprocess.check_output(['git', 'show', '-s', '--format=%ci', commit_hash]).decode('utf-8')
        # print(f"  last_commit_date_output: {last_commit_date_output}")
        last_commit_date = datetime.strptime(last_commit_date_output.strip(), '%Y-%m-%d %H:%M:%S %z')
        # print(f"  last_commit_date: {last_commit_date}")

        branches_by_date.append((branch_name, last_commit_date))

    return branches_by_date

# Replace 'origin' with your remote name
remote_branches = get_remote_branches_by_date('origin')

# Make the cutoff_date timezone-aware using UTC timezone
cutoff_date = datetime(int(yyyy), int(mm), int(dd), tzinfo=timezone.utc)

recent_branches = [(name, date) for name, date in remote_branches if cutoff_date > date ]
for branch_name, last_commit_date in recent_branches:
    print(f"{last_commit_date} -- {branch_name}")
    print(f"  git push origin :{branch_name}\n")