This is hard to fix in a non breaking way and I think it will nut be fixed
in the short term. Hopefully by the end of the year Packer uses HCL2 and
that will fix this problem.
This is very easily handled with jq.
$ echo '{ "a": "", "b": "X" }' | jq '.a=[ 1, 2, 3 ]'
{
"a": [
1,
2,
3
],
"b": "X"
}
On Thu, Mar 14, 2019 at 5:45 PM Todd Foley <[email protected]> wrote:
> Okay, i'll create a single template for each build; sounds like we need to
> write a tool that generates the template from a script to get around this.
> Any chance for this to be a feature request the team might take up?
>
> On Wednesday, March 13, 2019 at 9:48:51 PM UTC-7, Rickard von Essen wrote:
>>
>> You can't.
>>
>> On Thu, Mar 14, 2019, 00:39 Todd Foley <[email protected]> wrote:
>>
>>> How do you escape a comma in a user variable?
>>>
>>> This breaks the functionality of the build. this example is based off
>>> the defined example:
>>> https://packer.io/docs/builders/docker.html#run_command
>>> The only difference is this is going through a user variable, which
>>> breaks because the parsing has no way to escape the comma that has to be
>>> ignored.
>>>
>>> {
>>> "variables": {
>>> "changes": "CMD [\"nginx\", \"-g\", \"daemon off;\"]"
>>> },
>>>
>>> "builders": [
>>> {
>>> "type": "docker",
>>> "image": "ubuntu:16.04",
>>> "run_command": ["-d", "{{.Image}}"],
>>> "changes": "{{ user `changes`}}",
>>> "commit": true
>>> }
>>> ],
>>> "post-processors": [
>>> [
>>> {
>>> "type": "docker-tag",
>>> "repository": "my/ubuntu",
>>> "tag": "16.04"
>>> }
>>> ]
>>> ]
>>> }
>>>
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