pony

pony.py

import collections

# NOTE requires GitPython>=0.3.2.RC1 for 'blame' support
from git import Repo


def autodict():
    return collections.defaultdict(autodict)

repo = Repo('/path/to/repo')
line_counts = autodict()

for f in repo.tree().traverse():
    if f.type == 'blob':
        try:
            for com in repo.blame('master', f.path):
                if com[0]:
                    pointer = line_counts
                    # vivify to filepath
                    for part in f.path.split('/'):
                        pointer = pointer[part]

                    if not pointer[com[0].committer.name]:
                        pointer[com[0].committer.name] = len(com[1])
                    else:
                        pointer[com[0].committer.name] += len(com[1])
        except AttributeError:
            # AttributeError: 'NoneType' object has no attribute 'groups' git/repo/base.py", line 625, in blame
            pass

# now calculate sub-tree aggregate line counts for every node in the tree


def aggregate(pointer, prev_pointer=None, fpath=''):
    if type(collections.defaultdict()) == type(pointer):
        # pointer is on a directory with subchildren
        for k in pointer.keys():
            if type(collections.defaultdict()) == type(pointer[k]):
                if fpath:
                    aggregate(pointer[k], pointer, fpath + "/" + k)
                else:
                    aggregate(pointer[k], pointer, k)
            else:
                aggregate(pointer[k], pointer, fpath)
    else:
        # pointer is at the end of the line -- int
        if prev_pointer:
            print fpath
            for k in prev_pointer.keys():
                print k, "-", prev_pointer[k], "lines total"
            print "\n"

aggregate(line_counts)