Unable to read multiple variables from an external file in cloudbuild.yaml

[Dhamodharan]

Hello All,

I am trying to execute a cloudbuild pipeline on part of a project, I have couple of variables configured in the code and I have passed those variable values through the CloudBuild environment variable settings,

But I would be having more variables for every releases, so instead of configuring the variables in pipeline settings, I am thinking we can pass those variables in an external file and read that variable in the cloudbuild.yaml config, I have tried but its not working,

Can someone help me with this? Or is there any other best approach to read the variables from an external file.