#! /bin/bash

set -e
set -x

if test "$1" = "" || test "$2" = ""; then
  echo "Usage: $0 pic.tikz pic.png [CONVERT FLAGS ...]"
  exit 1
fi

TIKZ="$1"
OUTF="$2"
shift
shift

TMPDIR=$(mktemp -d)
TEX="$TMPDIR/source.tex"

cat <<END > $TEX
\documentclass[preview]{standalone}
\nonstopmode
\usepackage{tikz}
\usetikzlibrary{calc}
\usetikzlibrary{positioning}
\usetikzlibrary{fadings}
\usetikzlibrary{chains}
\usetikzlibrary{scopes}
\usetikzlibrary{shadows}
\usetikzlibrary{arrows}
\usetikzlibrary{snakes}
\usetikzlibrary{shapes.misc}
\usetikzlibrary{shapes.symbols}
\usetikzlibrary{shapes.multipart}
\usetikzlibrary{fit}
\usetikzlibrary{shapes.arrows}
\usetikzlibrary{shapes.geometric}
\usetikzlibrary{shapes.callouts}
\usetikzlibrary{decorations.text}

\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background,main,foreground}

\renewcommand*\familydefault{\sfdefault}

\begin{document}
END

cat $TIKZ >> $TEX

cat <<END >> $TEX
\end{document}
END

(cd "$TMPDIR"; pdflatex source)
(cd "$TMPDIR"; convert "$@" source.pdf source.png)
cp "$TMPDIR/source.png" "$OUTF"