split.py

"""Outputs the LaTeX source for a single chapter."""

import sys

def main(tex, num):
 src = open(tex)
 # copy the preamble
 for line in src:
 print line,
 if line.startswith("\\begin{document}"):
 print "\\setcounter{chapter}{" + str(num - 1) + "}\n"
 break
 # copy the chapter
 i = -1
 for line in src:
 if line.startswith("\\backmatter"):
 break
 if line.startswith("\\chapter"):
 i += 1
 if i > num:
 break
 if i == num:
 print line,
 print "\\end{document}"

if __name__ == "__main__":
 if len(sys.argv) == 3:
 main(sys.argv[1], int(sys.argv[2]))
 else:
 print "Usage: python split.py MAIN.tex NUMBER"