How to specify variable for 'bool' item

[Yusuke Masuda]

Hi.

I want to specify a variable for 'bool' type item such as "keep_input_artifact".

Firstly, I tried this.

  "keep_input_artifact": "{{user `keep_input_artifact`}}",
   :
   :
  "variables": {
    "keep_input_artifact": true,
  }

Then I got an error below.

Failed to parse template: 2 errors occurred:
        * variable keep_input_artifact: '' expected type 'string', got unconvertible type 'bool'
        * post-processor 1.1: 1 error(s) decoding:

* 'keep_input_artifact' expected type 'bool', got unconvertible type 'string'

It seems to say that it is wrong to specify the string value to 'bool' type.

Next I tried removing the quotes.

  "keep_input_artifact": {{user `keep_input_artifact`}},
   :
   :
  "variables": {
    "keep_input_artifact": true,
  }

So I got another error below.

Failed to parse template: Error parsing JSON: invalid character '{' looking for beginning of object key string
At line 42, column 34 (offset 1204):
   41:         "type": "vagrant",
   42:         "keep_input_artifact": {{
                                       ^

The error was a kind of JSON syntax error, seemed that it interpret the bracket for template as a part of JSON object.

I wonder I cannot use a variable for not string fields.
Please give me any advice for this, if you have.

Sincerly,

Yusuke

[Rickard von Essen]

See https://github.com/hashicorp/packer/issues/2630

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[Yusuke Masuda]

Thank you for informing it.
I understood this is a known issue, and it is difficult to fix without architectural improvement.

Will wait for new version rolling out.

Thanks,

Yusuke.