How to use string substitution (hyphen to underscore) for key inside strenv?

[sanzoghenzo]

Hi there, first of all, many thanks for this wonderful tool!

I'm trying to handle docker swarm secrets and configs updates as described here, but using Task and yq.

My docker compose file (I call it stack.yaml) is something like this

services:
  # various containers
configs:
  first-config:
    file: ./configs/first.yaml
  # other configs here
secrets:
  first-secret:
    file: ./secrets/my-first-secret
  # and so on

To sum up: for each entry in the configs and secrets sections, I need to add the name attribute and set it to the key + the md5sum of the .file.

With the following I can successfully build the envvars with the md5sum of the files

tasks:
  deploy-stack:
    desc: Deploy the stack specified in STACK_NAME envvar
    vars:
      STACK_DIR: stacks/{{.STACK_NAME}}
      COMPOSE_FILE: '{{.STACK_DIR}}/stack.yaml'
      HASHES:
        sh: "yq -o=shell '.secrets + .configs | map(key: \"$(md5sum {{.STACK_DIR}}/\" + .file + \" | cut -f 1 -d \\\" \\\")\") | flatten | .[]' {{.COMPOSE_FILE}}"
    cmds:
      - cmd: echo "{{.HASHES}}"

$ STACK_NAME=test task deploy-stack
first_config=<hash of ./configs/first.yaml>
first_secret=<hash of ./secrets/my-first-secret>

I'm stuck on the second part, which is to set the name attribute; since the variables from the -o=shell output have underscores in place of hyphens, I need to replace them in the keys in order to match them with strenv. I tried with this:

      - cmd: "{{.HASHES}} yq 'with(.secrets[]; .name = key + strenv(key | sub(\"-\", \"_\")))' {{.COMPOSE_FILE}} | yq 'with(.configs[]; .name = key + strenv(key | sub(\"-\", \"_\")))'"

but I got Error: bad expression, got close brackets without matching opening bracket

I bet this is because the pipe operator is not allowed inside parenthesis of other operators (strenv in this case).
Is there a smarter way to solve this?

[sanzoghenzo]

Oh wait, I just tried to use underscores in my secrets keys instead of hyphens, but I realized that the value inside the strenv needs to be the actual environment variable name.

Is there any way to use the key (or better yet, the result of an operator) as a dynamic parameter for strenv?

[sanzoghenzo]

....aaaaaand now I see that there's an open issue for this

#1995