nvalt_preprocess4marked.py

#! /usr/bin/python

# author: Steve Harris
# Convert short nvAlt image links to full path for previewing in Marked

# Todo
# ====
# - move the pathto line to a variable
# - post this script as a gist

# Log
# ===
# 140712
# - adapted from https://github.com/potsky/SublimeBuildForMarked/blob/master/Py%20Preprocessor%20for%20Marked/preprocessor.py

import sys
import re

insert_full_image_path = re.compile(r"!\[(.*?)\]\((.*?\.png|jpg|gif|svg|tif|pdf|eps)\)")

try:
	for line in sys.stdin:
		print re.sub(insert_full_image_path, r"![\1](/users/steve/pictures/nvalt-img/\2)", line)
except KeyboardInterrupt:
	sys.stdout.flush()
	pass

Full explanation here