docker builder: double backslash breaks exec form of changes about packer-plugin-docker HOT 2 OPEN

I think this should be way better with HCL2 config files. Please tell me if that is not the case. We'll soon close this issue otherwise.

from packer-plugin-docker.

I've noticed the same issue in my.pkr.hcl

changes = [
    "ENTRYPOINT [\"powershell.exe\", \"-NoProfile\", \"-ExecutionPolicy\", \"Bypass\", \"-Command\", \"C:\\entrypoint.ps1\", \";\"]"
  ]

which generates

"Entrypoint": [
      "cmd /S /C [\"powershell.exe\", \"-NoProfile\", \"-ExecutionPolicy\", \"Bypass\", \"-Command\", \"C:\\entrypoint.ps1\", \";\"]"
  ],

Changing my.pkr.hcl to

changes = [
  "ENTRYPOINT [\"powershell.exe\", \"-NoProfile\", \"-ExecutionPolicy\", \"Bypass\", \"-Command\", \"Set-Location\", \"C:/\", \";\"]",
    "CMD [\"./entrypoint.ps1\"]"
]

seems to be the right workaround and it generates correct syntax:

"Cmd": [
    "./entrypoint.ps1"
],
"Entrypoint": [
    "powershell.exe",
    "-NoProfile",
    "-ExecutionPolicy",
    "Bypass",
    "-Command",
    "Set-Location",
    "C:/",
    ";"
],

By the way, there is this old issue which also touches on this topic, but the documented syntax does not seem working, hashicorp/packer#8225

$ packer version
Packer v1.8.7
$ packer plugins installed
C:\Users\MateuszL\AppData\Roaming\packer.d\plugins\github.com\hashicorp\docker\packer-plugin-docker_v1.0.8_x5.0_windows_amd64.exe

from packer-plugin-docker.