Compare version numbers using jinja2

问题

I am using jinja2 template to install/upgrade packages.

The logic was setting a variable for current installed version and compare it with the available version. It was working fine but once we passed in to 10.x, comparison quit working.

Is it possible to cast the variable so it can correctly identify 10.9.8 is greater than 9.8.7?

Thanks

current_version=['9.8.7']

{% if current_version < '10.9.8' %}

回答1:

There's a special test version_compare:

{% if current_version | version_compare('10.9.8', '<') %}

current_version should be string (it is a list in your example).

回答2:

In saltstack you can use pkg.version_cmp

See my reply here: How to compare version strings in salt sls files

来源：https://stackoverflow.com/questions/46324330/compare-version-numbers-using-jinja2