git - How to increment docker tag automatically? -

i planning increment docker tag automatically using shell script. right using date function insert %m%d%y%h%m docker tag. every time, current month year , date hours , mins inserting 03262016091.

but when see in docker hub, it's not looking , planning keep version names 1.0.0 or git commit number.

i using travis ci continuous integration not build docker images. have shell script using docker file.

my requirement is:

i have increment below version number everytime when execute build.

version=1.0.0

could please me how this?

if repository named your/project , tagged 1.0, following should rebuild tag 1.01:

docker build -t your/project:$(docker images | awk '($1 == "your/project") {print $2 += .01; exit}') .