#!/usr/bin/env python
"""
Like xargs but with a temporary file from stdin instead of the arguments
themselves.  Read a file from stdin, copy it to a temporary file and call the
given command line with the temporary filename as an argument.

For example, you can use this to view PDF files read from stdin::

  dot -Tps file.dot | ps2pdf - | xargf acroread

"""

import sys, shutil, tempfile
from subprocess import Popen

def main():
    f = tempfile.NamedTemporaryFile('w', suffix='.pdf')
    shutil.copyfileobj(sys.stdin, f)
    f.flush()
    p = Popen(" ".join(sys.argv[1:] + [f.name]), shell=True)
    p.wait()
    f.close()

if __name__ == '__main__':
    main()