It turns out to be a really old version! I've updated to the latest and 
it's working now, thanks.

On Wednesday, 12 July 2017 17:37:40 UTC+1, Rickard von Essen wrote:
>
> Which version of Packer? 
>
> On Jul 12, 2017 17:55, "Matt Brewster" <[email protected] 
> <javascript:>> wrote:
>
>> That doesn't work I'm afraid, it creates the tag but the value is "<no 
>> value>".
>>
>> On Wednesday, 12 July 2017 15:11:21 UTC+1, Rickard von Essen wrote:
>>>
>>> This should work:
>>>
>>> "tags": {
>>> "based_on_ami": "{{.SourceAMI}}"
>>> }
>>>
>>> On Jul 12, 2017 15:38, "Matt Brewster" <[email protected]> wrote:
>>>
>>>> Hi all,
>>>>
>>>> Most of my builders look up an AMI based on a source_ami_filter. I'd 
>>>> like to tag the created AMI with the source AMI ID so there's an audit of 
>>>> the hierarchy. The documentation states:
>>>>
>>>> tags <https://www.packer.io/docs/builders/amazon-ebs.html#tags> (object 
>>>>> of key/value strings) - Tags applied to the AMI and relevant snapshots. 
>>>>> This is a template engine 
>>>>> <https://www.packer.io/docs/templates/engine.html> where the SourceAMI 
>>>>> variable 
>>>>> is replaced with the source AMI ID and BuildRegion variable is 
>>>>> replaced with the value of region.
>>>>
>>>>
>>>> So far I have tried:
>>>>
>>>> {
>>>> "variables": {
>>>> "SourceAMI": ""
>>>> },
>>>> "builders": [
>>>> {
>>>> "type": "amazon-ebs",
>>>> "region": "eu-west-2",
>>>> "instance_type": "t2.small",
>>>> "ssh_username": "ec2-user",
>>>> "ami_name": "root-{{timestamp}}",
>>>> "source_ami": "ami-11130775",
>>>> "tags": {
>>>> "based_on_ami": "{{user `SourceAMI`}}"
>>>> }
>>>> }
>>>> ]
>>>> }
>>>>
>>>>
>>>> {
>>>> "builders": [
>>>> {
>>>> "type": "amazon-ebs",
>>>> "region": "eu-west-2",
>>>> "instance_type": "t2.small",
>>>> "ssh_username": "ec2-user",
>>>> "ami_name": "root-{{timestamp}}",
>>>> "source_ami": "ami-11130775",
>>>> "tags": {
>>>> "based_on_ami": "{{user `SourceAMI`}}"
>>>> }
>>>> }
>>>> ]
>>>> }
>>>>
>>>>
>>>> {
>>>> "builders": [
>>>> {
>>>> "type": "amazon-ebs",
>>>> "region": "eu-west-2",
>>>> "instance_type": "t2.small",
>>>> "ssh_username": "ec2-user",
>>>> "ami_name": "root-{{timestamp}}",
>>>> "source_ami": "ami-11130775",
>>>> "tags": {
>>>> "based_on_ami": "{{`SourceAMI`}}"
>>>> }
>>>> }
>>>> ]
>>>> }
>>>>
>>>>
>>>> {
>>>> "builders": [
>>>> {
>>>> "type": "amazon-ebs",
>>>> "region": "eu-west-2",
>>>> "instance_type": "t2.small",
>>>> "ssh_username": "ec2-user",
>>>> "ami_name": "root-{{timestamp}}",
>>>> "source_ami": "ami-11130775",
>>>> "tags": {
>>>> "based_on_ami": "{{`.SourceAMI`}}"
>>>> }
>>>> }
>>>> ]
>>>> }
>>>>
>>>>
>>>> So far none of these have worked. Can someone point me in the right 
>>>> direction please..?
>>>>
>>>> Thanks
>>>> Matt
>>>>
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>>>> This mailing list is governed under the HashiCorp Community Guidelines 
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>>>>  
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>>>>  
>>>> <https://groups.google.com/d/msgid/packer-tool/3b7d907b-2fc2-40f6-9e73-2ed00b501c6b%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>> .
>>>> For more options, visit https://groups.google.com/d/optout.
>>>>
>>> -- 
>> This mailing list is governed under the HashiCorp Community Guidelines - 
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>> violation of those guidelines may result in your removal from this mailing 
>> list.
>>  
>> GitHub Issues: https://github.com/mitchellh/packer/issues
>> IRC: #packer-tool on Freenode
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>> You received this message because you are subscribed to the Google Groups 
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>> To unsubscribe from this group and stop receiving emails from it, send an 
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>> To view this discussion on the web visit 
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>>  
>> <https://groups.google.com/d/msgid/packer-tool/07a2373f-3a0a-47da-8a9b-6c046c49ac1a%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>> For more options, visit https://groups.google.com/d/optout.
>>
>

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