consider to allow for variable substitution in the inputs section

testing #64214:

I assume that variable substitution in the “inputs” section is disabled to avoid recursion…

However, I think it would be helpful to allow “simple” non-interactive variables like ${env:…}, ${config:…}, ${workspaceFolder:…}. This makes it possible to do something like this:

{
			"label": "echoPrompt",
			"description": "Please enter a folder name",
			"default": "${env:HOME}",
			"type": "prompt",
}

[alexvy86]

My use case would be to use the path to the current file as the default value for one of my inputs.

"inputs": [
  {
    "id": "which-file",
    "description": "Enter the path to a .py file",
    "default": "${file}",
    "type": "promptString",
  }
]

[codewrite]

Are there any workarounds? i.e. any way to have a variable input default?