* HCL2: Test that the packer block passes in packer validate
* HCL2: Test invalid packer blocks are invalid
* docs: state from which version the packer block is available
* handle template_dir, pwd funcs, handle min_packer_version
* gotpl packer_version becomes hcl2 packer.version
* uuid becomes hcl2 uuidv4
* test code with emojis
* handle all cases were we cannot guess what the argument was
* handle clean_resource_name cases
* up docs
* add the possibility to set the packer.required_version field; to make sure the template file works with that version of Packer
* add tests
* add documentation on packer.required_version
Example:
packer {
required_version = ">= 1.2.0, < 2.0.0"
}
hcl2_upgrade transforms a JSON build-file in a HCL2 build-file.
This starts a validated Packer core and from that core we generate an HCL 'block' per plugin/configuration. So for a builder, a provisioner, a post-processor or a variable. The contents of each block is just transformed as is and basically all fields are HCL2-ified.
A generated field can be valid in JSON but invalid on HCL2; for example JSON templating (in mapstructure) allows to set arrays of strings - like `x = ["a", "b"]` - with single strings - like `x="a"` -, HCL does not allow this.
Since JSON does not make the distinction between variables and locals, everything will be a variable. So variables that use other variables will not work.
hcl2_upgrade tries to transform go templating interpolation calls to HCL2 calls when possible, leaving the go templating calls like they are in case it cannot.
Work:
* transpiler
* tests
* update hcl v2 library so that output looks great.
* update docs
added `post-processors` block to run chained post-processors after a build.
Before this, defining multiple `post-processor` blocks after
provisioning steps would run them sequentially, now doing this makes them start
from the build's artifact. To queue post-processors you now have to define them
in a `post-processors` block.
This is a breaking change.
The initialization of packer core in JSON also validates that `null` variables were set, except in the case of `packer validate --syntax-only` , but after the refactor to allow to have all commands work with HCL2 and JSON this subtlety was lost.
This refactors the initialisation of the core in order to allow to have `packer validate --syntax-only` not error in case a variable is not set. Since these calls are refactored this works for HCL2 too.
fix#9478
Wilken Rivera
Megan Marsh
Adrien Delorme
Adrien Delorme
Peter Willis
sylviamoss