# Prerequisites (depends on distribution)

apt-get install libcairo2-dev
apt-get install libgit2-dev
apt-get install qiv

# Get all the things we need

git clone http://neo900.org/git/ee.git newdir
cd newdir/hw
git clone git://projects.qi-hardware.com/kicad-libs.git
git clone git://projects.qi-hardware.com/eda-tools.git
make -C eda-tools/sch2fig

# Generate PNG for old, new, and difference

LIBS="neo900.lib kicad-libs/components/powered.lib"
eda-tools/sch2fig/sch2fig $LIBS 6a9f71:neo900_SS_5.sch -- png -s 2 -o old.png
eda-tools/sch2fig/sch2fig $LIBS neo900_SS_5.sch -- png -s 2 -o new.png
eda-tools/sch2fig/sch2fig $LIBS 6a9f71:neo900_SS_5.sch -- \
  diff -s 2 -o diff.png $LIBS neo900_SS_5.sch

# View the result

qiv -t diff.png old.png new.png