ctnd/version.sh

if [ -f version.dat ]; then
    > version.dat
fi

commit=$(git rev-parse --short HEAD)
ts=$(date +%s)
changed=$(git diff --name-only HEAD)
dirty=1

if [ -z "${commit}" ];
then
    echo "commit is unset or set to the empty string"
    if [ -f version.dat ]; then
        rm version.dat
    fi
    exit
else
    echo "commit is set to '$commit'"
fi

if [ -z "${ts}" ];
then
    echo "ts is unset or set to the empty string"
    if [ -f version.dat ]; then
        rm version.dat
    fi
    exit
else
    echo "ts is set to '$ts'"
fi


if [ -z "${changed}" ];
then
    dirty=0
fi
echo "modify flag is set to '$dirty'"

echo "generate version.dat"
echo $commit-$ts-$dirty >> version.dat

arm-linux-gnueabihf-ld -r -b binary -o version.o version.dat
arm-linux-gnueabihf-readelf -a version.o

# gcc data.c version.o -o data
# ./data