I've been having a go at injecting secrets into config files using the op inject CLI command, which is nice, but I'm already running into some problems. What I'm running in to right now is a way to indent secrets that have multi-line values. For instance, I'd like to inject a Google Service Account JSON key into my YAML config:


my_config:
gcs:
service_account_key: |
{{ op://my-secret/gcs_service_account_key }}


This will result in malformed YAML:


my_config:
gcs:
service_account_key: |
{
"type": "service_account",
"project_id": "myproject-12345",
[...]
}

It would be really nice if the op inject command would support basic filters, for instance to fix the indentation:


my_config:
gcs:
service_account_key: |
{{ op://my-secret/gcs_service_account_key | indent }} # autodetect indentation

or:

my_config:
gcs:
service_account_key: |
{{ op://my-secret/gcs_service_account_key | indent 6 }} # specify the exact indentation

I'm sure there are many other useful filters (like base64 for instance).

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