pre-commit

#!/usr/bin/env python

# Example pre-commit hook written in python
# (c) 2016 Brent Laster

import sys, os, subprocess

# define the string we want to check for
IUO_WEBSITE='http://internal.mycompany.com'
try:
             # Get the status from Git in the short form
             # Note: Could use -s instead of --porcelain
             #  but porcelain is guaranteed not to break 
             #  backwards-compatibility between releases.
             status_output = subprocess.check_output(
                    ["git","status","-uno","--porcelain"],
                    stderr=subprocess.STDOUT).decode("utf-8")
		
             # create a list of status lines
             status_list = status_output.splitlines()
		
             for status_line in status_list:
                    # if the status line starts with A, then it is in the staging area
                    if status_line.startswith('A'):
                           status, _, status_file = status_line.partition(" ")
                           staged_file = status_file.lstrip()
                           # git the relative path from Git in case the file
                           #  is in a subdirectory of the working directory
                           rpath = subprocess.check_output(
                                 ["git","rev-parse","--show-prefix"],
                                stderr=subprocess.STDOUT).decode("ISO-8859-1")
                           relative_path = rpath.rstrip()
				
                           # construct the :<path> syntax needed for show
                           #  to dump the contents of the staged version
                           staged_fullpath = ":" + relative_path + staged_file
		
                           # Use the git show :<path> syntax to get the contents
                           #  of the actual staged version
                           staged_content = subprocess.check_output(
                                 ["git","show",staged_fullpath],
                                 stderr=subprocess.STDOUT).decode("ISO-8859-1")
                           # if we find the forbidden string, then abort the commit
				
                           if IUO_WEBSITE in staged_content:
                                 tpath = relative_path + staged_file
                                 print ("Error!",IUO_WEBSITE,"found in file",tpath)
                                 print ("Commit disallowed due to error.")
                                 sys.exit(-1)
               sys.exit(0)
					
except subprocess.CalledProcessError:
       print ("error!")
       sys.exit(-2)