Mac support: This process cannot access the file because it is being used by another process

[Downchuck]

This appears to be broken on Mac because when it runs the "cm" tool it does not set the working directory correctly in process execution.

Using zsh to get around that, however, I wind up with "This process cannot access the file because it is being used by another process" which seems to come from RunCommand being run concurrently, as though it is being threaded when only a single process descriptor is open.

Both seem like trivial fixes that would make Mac work.

[SRombauts]

Hello,

What do you mean by that?

static bool _StartBackgroundPlasticShell(const FString& InPathToPlasticBinary, const FString& InWorkingDirectory)
{
	 ...
	ShellProcessHandle = FPlatformProcess::CreateProc(*InPathToPlasticBinary, *FullCommand, bLaunchDetached, bLaunchHidden, bLaunchReallyHidden, nullptr, 0, *InWorkingDirectory, ShellOutputPipeWrite, ShellInputPipeRead);

Is that that using the WorkspaceRoot as the InWorkingDirectory not what is expected by "cm"?

Or do you mean that somehow Unreal's FPlatformProcess::CreateProc() doesn't work correctly on macOS?

Asking genuinly since I haven't had the opportunity to check myslef the plugin on Mac (yet)

[aTanguay]

Any movement on a Mac version? We're really hoping for one. Not a programmer, but I'd love to help getting a version going.

[SRombauts]

Hello @aTanguay, would you be able to compile the plugin yourself as part as your game project, or do you need a binary version?
What would help the most in order would be:

1. If you can built it yourself, test and report here with the logs on what isn't working
2. Or create a support ticket to help us deduce the importance of this, raise priority

[aTanguay]

Thanks...I need a binary version. I'm a technical director for UE projects, but not a programmer. We're hoping to use Plastic on our project, but we have Macs in our mix.

[SRombauts]

Ok, noted! I am currently out for the week.
Would you be able to create a support ticket with the few useful info, most notably the Engine version you use, and perhaps the number of expected users on MacOS?
You can find various support links and email the team, but the most up to date form is https://support.unity.com/hc/en-us/requests/new

[aTanguay]

Will do! Thanks for your support. We'll see what we can do on our end too. Maybe one of our devs can see what might be involved.

[SRombautsU]

Hey, checking back on the topic before I try to dig in.
Did you ever get someone to try to fix it?