在https://packer.io/guides/hcl/from-json-v1/中，它说
注意：从 1.5.0 版本开始，Packer 可以读取 HCL2 文件。
而我的packer_1.5.5_linux_amd64.zip打包程序应该能够读取 HCL2 文件。但是，当我尝试它时，我得到了
$ packer build -only=docker hcl-example
Failed to parse template: Error parsing JSON: invalid character '#' looking for beginning of value
At line 1, column 1 (offset 1):
1: #
^
==> Builds finished but no artifacts were created.
$ packer build -h
Usage: packer build [options] TEMPLATE
Will execute multiple builds in parallel as defined in the template.
The various artifacts created by the template will be outputted.
Options:
-color=false Disable color output. (Default: color)
-debug Debug mode enabled for builds.
-except=foo,bar,baz Run all builds and post-procesors other than these.
-only=foo,bar,baz Build only the specified builds.
-force Force a build to continue if artifacts exist, deletes existing artifacts.
-machine-readable Produce machine-readable output.
-on-error=[cleanup|abort|ask] If the build fails do: clean up (default), abort, or ask.
-parallel=false Disable parallelization. (Default: true)
-parallel-builds=1 Number of builds to run in parallel. 0 means no limit (Default: 0)
-timestamp-ui Enable prefixing of each ui output with an RFC3339 timestamp.
-var 'key=value' Variable for templates, can be used multiple times.
-var-file=path JSON file containing user variables. [ Note that even in HCL mode this expects file to contain JSON, a fix is comming soon ]
而且我没有看到任何从上面切换到 HCL2 模式的开关。
我在这里缺少什么？
$ packer version
Packer v1.5.5
$ cat hcl-example
# the source block is what was defined in the builders section and represents a
# reusable way to start a machine. You build your images from that source.source
"amazon-ebs" "example" {
ami_name = "packer-test"
region = "us-east-1"
instance_type = "t2.micro"
}
[更新：]
为了解决马特的评论/担忧，我已将 hcl-example 的内容更改为https://packer.io/guides/hcl/from-json-v1/中的整个列表，并且
mv hcl-example hcl-example.hcl
$ packer validate hcl-example.hcl
Failed to parse template: Error parsing JSON: invalid character '#' looking for beginning of value
At line 1, column 1 (offset 1):
1: #
^