Find the first tag a file was in and the last tag it was changed in

find_tags.py

import subprocess

tags = [
    subprocess.check_output(["git", "rev-list", "--max-parents=0", "HEAD"]).strip()
]
tags.extend(
    subprocess.check_output(["git", "tag", "-l"]).split(),
)

added = {}
changed = {}

for left, right in zip(tags, tags[1:]):
    files = set(subprocess.check_output(
        ["git", "show", "{}...{}".format(left, right), "--no-commit-id", "-r", "--name-only", "--format=format:"]
    ).strip().split())

    for file in files:
        if file not in added:
            added[file] = right
        changed[file] = right


for file, version in added.items():
    print file, version, changed[file]