TextMate command to smart-wrap a line to 78 chars, accounting for indent.

example.html

<!-- before -->
<p>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
</p>

<!-- after -->
<p>
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
    veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
    commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
    velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint
    occaecat cupidatat non proident, sunt in culpa qui officia deserunt
    mollit anim id est laborum.
</p>

textmate-smart-wrap.py

#!/usr/local/bin/python

import os
import re

line = os.environ['TM_CURRENT_LINE'] 
line_length = len(line)

p = re.compile('^\s*')
indent = p.match(line).group()
indent = indent.expandtabs(2)
indent_size = len(indent)

line = line.lstrip()
chunk_size = 78 - indent_size

out = []
i = 0
while len(line.strip()) and i < 100:
	idx = line.rfind(' ', 0, chunk_size)
	idx2 = line.find(' ', chunk_size)
	if idx < 0 or len(line) < chunk_size:
		if idx2 < 0:
			out.append(indent + line)
			break
		out.append(indent + line[0:idx2])
		line = line[idx2+1:]
	else:
		out.append(indent + line[0:idx])
		line = line[idx+1:]
	i = i + 1

print ('\n'.join(out))

Do we have to do anything else to install this?
Restart textmate, only works on certain OSs or anything?

Adjust any settings afterward in Textmate?
I just created the file and I notice no changes to the way it soft wraps.