autocompletion not working on windows bash & powershell

[patricklx]

its possible to remove the .exe extension to use binaries in windows git bash by specifying shopt -s completion_strip_exe
but bash still calls it with the exe extension. this leads to the issue that the completions are only registerd for the binary.exe and not also for just binary

e.g.: containers/podman#16499

it registers only podman.exe: complete -o default -F __start_podman.exe podman.exe
it should also inlclude without .exe extension: complete -o default -F __start_podman.exe podman.exe podman.

[patricklx]

autocompletion for powerhsell also does not work as its using e.g podman.exe in the variable names, turning it into a property lookup

[github-actions]

The Cobra project currently lacks enough contributors to adequately respond to all issues. This bot triages issues and PRs according to the following rules:

• After 60d of inactivity, lifecycle/stale is applied. - After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied and the issue is closed.
  You can:
• Make a comment to remove the stale label and show your support. The 60 days reset. - If an issue has lifecycle/rotten and is closed, comment and ask maintainers if they'd be interested in reopening

[rhatdan]

We still want this one.

[Aetylus]

I'm unsure of how to fix the Powershell completer to register both to the .exe and non-.exe variant of the command in the template, but as far as getting the generated script to work, would it be safer to just always wrap potentially problematic names in curly braces {}?

For example, based off podman.exe, there are issues with the following lines in the Powershell template:

[scriptblock]$__%[2]sCompleterBlock = {

    # First disable ActiveHelp which is not supported for Powershell
    $env:%[10]s=0

Register-ArgumentCompleter -CommandName '%[1]s' -ScriptBlock $__%[2]sCompleterBlock

For Podman, these end up creating the following:

[scriptblock]$__podman.exeCompleterBlock = {

    # First disable ActiveHelp which is not supported for Powershell
    $env:PODMAN.EXE_ACTIVE_HELP=0

Register-ArgumentCompleter -CommandName 'podman','podman.exe' -ScriptBlock $__podman.exeCompleterBlock

All of these have problems due to the period making Powershell interpret them as properties. However, the following would work:

[scriptblock]${__podman.exeCompleterBlock} = {

    # First disable ActiveHelp which is not supported for Powershell
    ${env:PODMAN.EXE_ACTIVE_HELP}=0

Register-ArgumentCompleter -CommandName 'podman.exe' -ScriptBlock ${__podman.exeCompleterBlock}

The only thing otherwise that needs to be handled for it to work is adding the non-.exe form of the command as part of the argument completer register. E.g.

Register-ArgumentCompleter -CommandName 'podman.exe','podman' -ScriptBlock ${__podman.exeCompleterBlock}

Though as mentioned, not familiar enough with what's going on here to know how that might be done generically and comprehensively.