Pass PowerShell variables to Docker commands


I’d like to script the management of Docker containers, but I find it difficult to pass PS variables to Docker commands, in particular due to path format differences.

The following line (*) and the likes you can find here do work, however they are inconvenient:

Indeed, PS Start-Process is perfect for an MSI installer where you need to see the popup and to control its level of visibility so as to understand that a silent installer is going. Instead, you don’t want to start a new window each time you run a console app and particularly in Docker, where you interact back and forth with caller and called shell.

To “Run a command, script, or script block” PS specifically provides &, “the call operator, also known as the ‘invocation operator'”. However, I attempted without success with:

Cmd.exe would perhaps make things easier, but PowerShell is the official shell to interact with Docker for Windows. Thus, there should be a reliable way to pass variable arguments to Docker commands.

(*) The remove switch -rm is used here only for the purpose of experimenting with the answer avoiding cluttering your workspace. Of course, I do not usually destroy the container as soon as I create it, but rather interact with it passing -ti.


@AnsgarWiechers proposes parameters splatting in a comment:

Assuming I am implementing it properly, it doesn’t work either and gives:


There is no need for parameter splatting or even the call operator, double-quoting solves:


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