invoke a command for every directory in a git repo

walk.py

#!/usr/bin/python3
import os
import sys

USAGE = """
    $ ./walk.py <repo> <outputdir>
"""

if len(sys.argv) != 3:
    print(USAGE)
    sys.exit()

if not (os.path.isdir(sys.argv[1])):
    print(USAGE)
    sys.exit()

repo = os.path.abspath(sys.argv[1])

if not (os.path.isdir(sys.argv[2])):
    print(USAGE)
    sys.exit()

outputDir = os.path.abspath(sys.argv[2])

os.chdir(repo)
files = [line.rstrip() for line in os.popen("git ls-files").readlines()]

paths = sorted(list(set([os.path.dirname(f) for f in files])))

def writeOutput(path, output):
    filename = os.path.join(outputDir, path.replace("/", "-") + '.txt')
    outputfile = open(filename, "w")
    outputfile.write(output)
    outputfile.close()

def doFame(path):
    print(path)
    output = os.popen('find .').read()
    print(output)
    writeOutput(path, output)

for p in paths:
    os.chdir(os.path.abspath(os.path.join(repo, p)))
    doFame(p)