Env var expansion in env vars?

Support
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1

Hello,

I’m using the new environment variables settings to set different values for each deploy context. On deploy previews, I would like to make the value dynamic by using the Git metadata REVIEW_ID. For example:

Env var Context bar
API_URL Production https://domain.com/api
API_URL Deploy Previews https://$REVIEW_ID.domain.com/api

I’ve tried using both $REVIEW_ID and ${REVIEW_ID} in the value but neither appears to work. Is it possible to do this?

Thanks

2

Hi Alistair,

Indeed that is not possible.

If both variables are available, of course you can achieve equivalent results by interpolating twice:

#!/bin/sh
DOMAIN=domain.com
PATH=/api
METHOD="https://"
INTERPOLATED_SUBDOMAIN=$REVIEW_ID
INTERPOLATED_URL=${METHOD}{$INTERPOLATED_SUBDOMAIN}.{$DOMAIN}{$PATH}
npm run build -d MYVAR=$INTERPOLATED_URL