counting SwiftStackers' contributions to Swift

swift_authors.py

from collections import Counter
import subprocess
import re

# run in a clone of git@github.com:openstack/swift.git

# thanks to http://stackoverflow.com/a/13687302
blame_output = subprocess.check_output('''git ls-tree --name-only -z -r HEAD | egrep -z -Z -E '\.py$' | xargs -0 -n1 git blame --line-porcelain | grep "^author " | sort | uniq -c | sort -nr''', shell=True)

number_regex = re.compile("(\d+)")

swiftstack_peeps = ["Samuel Merritt", "Clay Gerrard", "John Dickinson", "Darrell Bishop", "Jon Snitow", "Leah Klearman", "Joe Arnold"]
swiftstack_counts = {p: 0 for p in swiftstack_peeps}
total_lines = 0

for listing in blame_output.split('\n'):
    try:
        lines_here = int(number_regex.search(listing).group(0))
    except:
        continue
    total_lines += lines_here
    for p in swiftstack_peeps:
        if p in listing:
            swiftstack_counts[p] += lines_here
            break

print swiftstack_counts
print "GRAND PERCENTAGE", float(sum(v for k, v in swiftstack_counts.items()))/total_lines