git post-commit hook to tweet your commit messages using twidge

post-commit.py

#!/usr/bin/python3.3
import sys
import subprocess

# The git hook will invoke this script with some data in STDIN
# So, let's re-assign stdin to /dev/tty so we can grab user input
# and decide whether or not to tweet this commit
sys.stdin = open('/dev/tty')
shouldTweet = input('Tweet this commit? y/n: ')
if shouldTweet != "y" and shouldTweet != "Y":
    quit()

MAX_LEN = 140
tweets = []

def trimString(inputStr):
  if len(inputStr) <= MAX_LEN:
    #print("tweet: " + inputStr)
    tweets.append(inputStr)
  else:
    tweet = inputStr[:MAX_LEN - 3] + "..."
    #print("tweet: " + tweet)
    tweets.append(tweet)
    trimString(inputStr[MAX_LEN - 3:])

p = subprocess.Popen(['git', 'log', '-1', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

out, err = p.communicate()
out = out.decode("utf-8").split("\n")
out = [segment for segment in out if segment]

author = out[1] # "Author: Zach <zachelko@gmail.com>"
tweet = author + " "
message = out[3].strip()
trimString(author + " " + message)

tweetStr = ""
for tweet in tweets:
  tweetOption = "update"
  subprocess.call(["twidge", tweetOption, tweet])