Late interpolation

[KalleDK]

Description

When using a variable with another inside, I would expect it to be interpolated at use time.
I don't know if I'm doing something wrong

version: '3'

vars:
  A: "a"
  B: "b"
  AB: "{{ .A }}{{ .B }}"

tasks:
  default:
    vars:
      A: "aa"
    cmds:
      - echo "{{ .AB }}"

I would expect it to output aab not ab (even with A: '{{ default "a" .A }}' ) is it not working

The whole problem arises from me setting a BUILD_DIR as a var and calculate that based on other variables.. Now if I include this taskfile and change some of the variables that are used in the BUILD_DIR, then these are updated, but BUILD_DIR stays default

Version

3.50.0

Operating system

Win 11 / Linux

Experiments Enabled

No response

Example Taskfile

version: '3'

vars:
  A: "a"
  B: "b"
  AB: "{{ .A }}{{ .B }}"

tasks:
  default:
    vars:
      A: "aa"
    cmds:
      - echo "{{ .AB }}"

[trulede]

@KalleDK global vars are resolved before task vars, so rework your example like this and you will get your expected outcome. I've used coalesce here because its useful for selecting a var to use, but you don't need it.

version: '3'

vars:
  A: "a"
  B: "b"
  Default_AB: "{{ .A }}{{ .B }}"

tasks:
  default:
    vars:
      A: "aa"
     Task_AB: "{{ .A }}{{ .B }}"
     AB: "{{coalesce Task_AB Default_AB}}"
    cmds:
      - echo "{{ .AB }}"

[KalleDK]

Thanks 👍 Seems I need to find another way to pass vars to included taskfiles if globals is evaluated before. As you write I could only have default in globals and select in each task, though that feels quite errorprone.