Need help on generating opendistro-alerting zip using a modified version of opendistro-alerting

I am using alerting-kibana-plugin (GitHub - opendistro-for-elasticsearch/alerting-kibana-plugin: 📟 Open Distro Kibana Alerting Plugin)
to generate How could I generate a custom alerting zip that will contain my enhancement changes made to alerting (GitHub - opendistro-for-elasticsearch/alerting: 📟 Open Distro Alerting Plugin) instead of opendistro-alerting-

Did you try the instructions on the build section?
I will try to use the branches of opendistro-1.2 to make sure to build it for those versions and follow the instructions on the build sections

opendistro-for-elasticsearch/alerting at opendistro-1.2 → Build
opendistro-for-elasticsearch/alerting-kibana-plugin at opendistro-1.2 → Build

The setup section in alerting kibana plugin specifies
Download and install the appropriate Open Distro for Elasticsearch Alerting plugin.

How do I install specific alerting changes that I have made and package it into a zip file?

Hi @sakthik26,
Once you have built the zip you can install it from your elasticsearch / kibana directory using the elasticsearch-plugin install file:///path/to/your/ and kibana-plugin install file:///path/to/your/ respectively. Both of those commands are located in the elasticsearch / kibana bin directory.