[Cuis-dev] problems in OSProcess

[David T. Lewis]

Merged. Thank you Nicola.

Dave


On Sat, Oct 16, 2021 at 02:26:51PM +0200, Nicola Mingotti via Cuis-dev wrote:
> 
> Hi David,
> 
> thank you for your feedback. After It i wiped out all my Cuis related 
> dir in this
> computer and restarted from scratch.
> 
> It was silly dependency problem. For some reason I was forgetting to
> load OSProcess before loading CommandShell, and, If I do it ex-post,
> it does not solve the problem.
> 
> To fix this once and for all, I put the explicit dependency on OSProcess 
> in the
> package CommandShell and sent you a pull request, i hope you
> are happy having a contributor to the package :)
> 
> bye
> Nicola
> 
> On 10/16/21 01:32, David T. Lewis via Cuis-dev wrote:
> >On Fri, Oct 15, 2021 at 04:52:22PM +0200, Nicola Mingotti via Cuis-dev 
> >wrote:
> >>Hi guys,
> >>
> >>I think there was a problematic change somewhere in OSProcess
> >>
> >>----- up to 4-5 days ago image this was ok ----
> >>ExternalUnixOSProcess command: ' ls -la '.???????????? # works
> >>PipeableOSProcess waitForCommand: 'ls -la' .???????? # works
> >>
> >>
> >>----- today updated Cuis-Smalltalk-Dev ----
> >>ExternalUnixOSProcess command: ' ls -la '.?????????? # works
> >>PipeableOSProcess waitForCommand: 'ls -la' .?????? # does not work
> >>
> >>=> warning: aio event forwarding not supported
> >>=> If i proceed I get this error: https://pasteboard.co/HFvroC7n6eEz.png
> >>
> >>. CommandShell was not changed, so i suppose it was a change in Cuis
> >>
> >>
> >>
> >Hi Nicola,
> >
> >I cannot reproduce this problem, but there are two things that
> >seem strange to me here.
> >
> >First, the emergency evaluator seems to be showing that an
> >instance of PipeableOSProcess does not understand the message
> >#inspectorClass. But #inspectorClass is implemented in Object
> >and PipeableOSProcess inherits from Object so this does not
> >seem possible. Can you check and make sure that the hierarchy
> >looks right? Maybe there was some problem in the way that the
> >CommandShell package was loaded in your image.
> >
> >Second, the 'warning: aio event forwarding not supported' is
> >a warning to tell you AioPlugin is not present in the VM.
> >AioPlugin is not required, but some OSProcess/CommandShell
> >functions may be less responsive if it is not there, hence the
> >warning message. For most Unix VMs, the AioPlugin is present (see
> >'Smalltalk listBuiltInModules' and 'Smalltalk listLoadedModules'
> >to check). So maybe you are running a different VM, or perhaps
> >the problem with PipeableOSProcess class hierarchy is somehow
> >causing the primitive to fail. I am not sure, but I suspect
> >some issue related to the way the CommandShell package was
> >installed.
> >
> >HTH,
> >Dave
> >
> 
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