Convert tex to png, per folder or per file. http://hpurmann.com/2015/04/12/gitdags-my-workflow/

tex2png

#!/bin/bash

texPath="_graphs"
outPath="graphimages"
tmpPath="tmp"
png_density="300"; # convert -density
png_quality="90"; # convert -quality

function convert_file {
  f=${1}
  echo "Processing ${f} ...";
  filename=${f##*/}

  cd ${texPath};
  mkdir -p ${tmpPath}
  pdflatex -output-directory=${tmpPath} ${filename} # > /dev/null
  cd "..";
  convert -density ${png_density} ${texPath}/${tmpPath}/${filename%.tex}.pdf -quality ${png_quality} ${outPath}/${filename%.tex}.png

  rm -r ${texPath}/${tmpPath}
}

if [ ${#} == 0 ];
then
  echo "Processing all tex files in ${texPath} ...";
  for f in ${texPath}/*
    do
      convert_file ${f}
    done
else
  fileName=${1}
  convert_file ${fileName}
fi