main.tex内のinputを展開して、一つのall.texをつくる

merge_tex.py

#!/usr/bin/python
import shutil

shutil.copyfile("./main.tex", "all.tex")

flg = True
while flg:
  flg = False
  out = []
  with open("all.tex", "r") as f:
    lines = f.readlines()
    for l in lines:
      l = l.lstrip()
      if l[0:7] == "\input{":
        fname = "./" + l.rstrip()[7:-1] + ".tex"
        with open(fname, "r") as g:
          out += g.readlines()
        out.append("\n")
        flg = True
      else:
        out.append(l)
  with open("all.tex", "w") as f:
    for l in out:
      f.write(l)

latexpand を使おう