ENV variables from app.yaml not available during npm postinstall

[Adnan Ibrišimbegović]

Using App Engine Flexible, nodeJS v8+.

I have a npm postinstall script that requires some env variables from app.yaml, but these vars are seemingly not available at the time "postinstall" script is running.

Can anyone point me to a documentation that explains what happens during deploy to App Engine, 

specifically, which services and variables become available in which order during deployment?

Can someone explain at what point do env vars from app.yaml become available under "process.env"?

Thank you.

[Steren Giannini]

Hi,

The install and postinstall steps do not happen in the same environment as the serving environment, they are done in Google Container Builder.

Once the app is built, it is moved to the serving environment.

I would need to double check, but I do not think env variables defined in app.yaml are injected in the build steps.

Could you tell us more about your use case?

Thanks

Steren

Product Manager

Google Cloud Platform

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