.gitignore

build/*
waf-*
.waf*
.lock-wafbuild

main.tex

% -*- mode: tex -*-
\documentclass[10pt]{article}
\usepackage{graphicx}
\begin{document}
\LaTeX document with generated figures.

\includegraphics[width=90mm]{sin.pdf}

\end{document}

sin.py

import sys
import pylab
import numpy

figpath =  sys.argv[1]
x = numpy.linspace(0, 10, num=200)
y = numpy.sin(x)
pylab.plot(x, y)
pylab.savefig(figpath)

waf

# -*- sh -*-
waf=waf-1.6.1

if [ ! -e $waf ]
then
    wget http://waf.googlecode.com/files/$waf
fi

python $waf "$@"

wscript

top = '.'
out = 'build'


def configure(conf):
    ## http://alan.lamielle.net/2009/09/29/using-waf-to-build-latex-documents
    conf.check_tool('tex')  ## not conf.load!
    if not conf.env.PDFLATEX:
        conf.fatal('could not find the program pdflatex')


def build(bld):
    bld(rule='python ${SRC} ${TGT}',
        target='sin.pdf',
        source='sin.py',
        before='pdflatex',
        )

    figs = 'sin.pdf'
    bld(name = 'main',
        features = 'tex',
        source = 'main.tex',
        ## after = figs,
        deps = figs,
        outs = 'pdf',
        prompt = 0,  ## 1 to see output of pdflatex
        )