I have this (real but simplified) workflow, where I would like in short to nest ${{ ${{...}} }}. In all cases, 'does not work' means syntax error when I attempt to run the workflow.
- steps:
- name: login to AWS
id: login-aws
uses: <some custom action finding automagically the aws account id>
# has an output: account-id
- name: Login to ECR
id: login-ecr
uses: aws-actions/amazon-ecr-login@v2
with:
mask-password: 'false' # needed to be able to use the password in the next step
# has an output which uses the aws account id in the variable name
- name: sort out variables
run: |
# what I would like
# nested ${{ does not work
echo ${{ steps.login-ecr.outputs.docker_username_${{ steps.login-aws.outputs.account-id }}_dkr_ecr_eu_central_1_amazonaws_com }}
# another attempt, still does not work
accountid=${{ steps.login-aws.outputs.account-id }}
echo ${{ format(steps.login-ecr.outputs.docker_username_{0}_dkr_ecr_eu_central_1_amazonaws_com, $accountid) }}" password_{0}_dkr_ecr_eu_central_1_amazonaws_com, $accountid) }}"
How could I get this variable steps.login-ecr.outputs.docker_username_{0} where {0} is itself a variable?
This was partly a stupid error (missing quotes) and partly helped by @jonrsharpe comment:
echo ${{ steps.login-ecr.outputs[format('docker_username_{0}_dkr_ecr_eu_central_1_amazonaws_com', steps.login-aws.outputs.account-id)] }}
format() needs quotes, and using the index ([]) operator instead of the dot notation, format can be properly used.