Task•4mo ago

yaml formatted data

Assuming a variable ARRAY like in https://taskfile.dev/blog/any-variables/#arrays , but YAML formatted. Is it possible, loop over a variable containing YAML formatted data (in this case a list) either inline or loaded from a .yaml file with templating functions? example data:

mydata:
  - one
  - two
  - three

mydata:
  - one
  - two
  - three

Any Variables | Task

Task variables are no longer limited to strings!

4 Replies

pbitty•4mo ago

@cloudneopren , I want to make sure I understand your question. The example in the docs shows:

tasks:
  foo:
    vars:
      ARRAY: [1, 2, 3]

tasks:
  foo:
    vars:
      ARRAY: [1, 2, 3]

Are you asking about whether you can format the array like this?

tasks:
  foo:
    vars:
      ARRAY:
        - 1
        - 2
        - 3

tasks:
  foo:
    vars:
      ARRAY:
        - 1
        - 2
        - 3

If so, yes. Both formats are valid YAML. If that is not your question, could you expand on it?

cloudneoprenOP•3mo ago

Hi @pbitty, this goes into the right direction. My use case: In case there is a file file.json with a list of tools to be installed each with configurable package managers: [{"cosign":{"pkm":"arkade"}},{"flux":{"pkm":"go"}},{"kubectl":{"pkm":"arkade"}}] Not sure, how to reference the key of the map and the "pkm" field:

  json-from-file:
    vars:
      FILE:
        sh: cat file.json
      ARRAY:
        ref: "fromJson .FILE"
    cmds:
      - echo FILE={{.FILE}}
      - echo ARRAY={{.ARRAY}}
      - for:
          var: ARRAY
        cmd: echo ITEM={{.ITEM.pkm}}  KEY={{.KEY}}

  json-from-file:
    vars:
      FILE:
        sh: cat file.json
      ARRAY:
        ref: "fromJson .FILE"
    cmds:
      - echo FILE={{.FILE}}
      - echo ARRAY={{.ARRAY}}
      - for:
          var: ARRAY
        cmd: echo ITEM={{.ITEM.pkm}}  KEY={{.KEY}}

pbitty•3mo ago

I think your issue is that the top-level type in file.json is not a map but an array. If I use the following file.json:

{
  "cosign":{"pkm":"arkade"},
  "flux":{"pkm":"go"},
  "kubectl":{"pkm":"arkade"}
}

{
  "cosign":{"pkm":"arkade"},
  "flux":{"pkm":"go"},
  "kubectl":{"pkm":"arkade"}
}

And the following Taskfile:

version: '3'

tasks:
  default:
    vars:
      FILE:
        sh: cat file.json
      ARRAY:
        ref: "fromJson .FILE"
    cmds:
      - for:
          var: ARRAY
        cmd: |
          echo '{{.KEY}}: {{.ITEM.pkm}}'

version: '3'

tasks:
  default:
    vars:
      FILE:
        sh: cat file.json
      ARRAY:
        ref: "fromJson .FILE"
    cmds:
      - for:
          var: ARRAY
        cmd: |
          echo '{{.KEY}}: {{.ITEM.pkm}}'

I get the output:

task: [default] echo 'cosign: arkade'

cosign: arkade
task: [default] echo 'flux: go'

flux: go
task: [default] echo 'kubectl: arkade'

kubectl: arkade

task: [default] echo 'cosign: arkade'

cosign: arkade
task: [default] echo 'flux: go'

flux: go
task: [default] echo 'kubectl: arkade'

kubectl: arkade

Would something like that work for your use-case?

cloudneoprenOP•3mo ago

Thanks, looks good

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yaml formatted data