process.py

#!/usr/bin/env python3
import sys
import git
import whatthepatch

# git hash-object -t tree /dev/null
EMPTY_TREE_SHA = "4b825dc642cb6eb9a060e54bf8d69288fbee4904"

repo = git.Repo(".")

file_name = sys.argv[1:]

commits = list(repo.iter_commits(paths=file_name))
commits.reverse()

# first commit hack
patch = commits[0].diff(EMPTY_TREE_SHA, file_name, True)[0].diff.decode("utf-8")
for diff in whatthepatch.parse_patch(patch):
	for (i, d, t, _) in diff.changes:
		print((d, i, t))

print((commits[0].author.name, commits[0].message))

for i, c in enumerate(commits):

	if i==0: continue

	patch = commits[i-1].diff(c, file_name, True)[0].diff.decode("utf-8")

	for diff in whatthepatch.parse_patch(patch):
		for (d, i, t, _) in diff.changes:
			if d==None or i==None:
				print((d, i, t))

	print((c.author.name, c.message))