expressions: json to raw

[static-moonlight]

I have a workflow that is being triggered by a message. This is a simplified version of it:

{
  "data": {
    "files": [
      {
        "name": "path/to/file1",
        "size": 23
      },
      {
        "name": "path/to/file2",
        "size": 42
      }
    ]
  }
}

What I need is a flat list of the files names (no json structure):

path/to/file1
path/to/file2

Currently, I am extracting that list with jq in an extra workflow step:

$ echo ${MESSAGE} | jq --raw-output ".data.files[].name"

I was playing around with Argo's expressions but couldn't get the desired result. I tried using jsonpath and map and also sprig function. The closed I got was a json array of the files names. Is there any way to do that with Argo's expressions?

[wesleyscholl]

@static-moonlight

This Argo expression:

'{{=join(jsonpath(inputs.parameters.message, "$.data.files[*].name"), "\n")}}'

Outputs:

path/to/file1
path/to/file2

See Workflow Variables for more info:

https://argo-workflows.readthedocs.io/en/latest/variables/#expression