[r3wretrhy]

Description

The powershell provisioner's default execute command sets ProgressPreference with:

Set-Variable -Name variable:global:ProgressPreference -Value 'SilentlyContinue'

Set-Variable -Name takes the variable name, so that looks for a variable literally called variable:global:ProgressPreference and never assigns $ProgressPreference. Scripts still see Continue (issue #13490).

Use $ProgressPreference='SilentlyContinue', matching packer-plugin-sdk's WinRM connect check.

Tested: go test ./provisioner/powershell/

Resolved Issues

Closes #13490

Rollback Plan

If a change needs to be reverted, we will roll out an update to the code within 7 days.

Changes to Security Controls

No.

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