[Newbies] Using squeak with a script?

[Jacques Harmand]

Thank you also for your answer!
Alas it doesn't work: the VM just waits forever (at least it does not
execute the "Smalltalk snapshot: false andQuit: true." on the next line),
and nothing is printed at all...
And yes, I run Squeak in the foreground without a '&' at the end of the
command line, with:
/path/to/squeak <options> /path/to/Squeak.image $(readlink -f "$1")
where <options> are "-headless" or "-vm-display-null -vm-sound-null".

If that's important, the Squeak 5.0-201608171728 VM I use
is cogspur64linux, compiled by myself, because the standard VM that can be
downloaded on squeak.org aborts with:
"pthread_setschedparam failed: Operation not permitted Read e.g.
https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/tag/r3732#linux"
and I cannot do what is explained on that page because I'm not the admin of
the computer.

2017-02-23 1:47 GMT+01:00 David T. Lewis <lewis at mail.msen.com>:

> Hi Jacques,
>
> Output to the standard output stream may be buffered, and that may be part
> of the problem. Try doing this and see if you get the expected output:
>
>   StandardFileStream stdout nextPutAll: 'Hello world'; cr; flush.
>
>
> On Wed, Feb 22, 2017 at 05:09:21PM +0100, Jacques Harmand wrote:
> > Thanks for your answers.
> > Alas ExternalCommandShell does not seem to work, the VM seems to wait
> > forever.
>
> Be sure that you are running Squeak in the foreground with no '&' at the
> end of your command. If you start it in background with a '&' then the
> stdin, stdout, and stderr streams will be disconnected from your console,
> and both the image and the VM will appear to be stuck as the
> ExternalCommandShell
> tries to read from the disconnected input stream.
>
> I just tried ExternalCommandShell with the latest Squeak, and I see
> that it probably needs a few more #flush to get the prompt to display
> properly. I'll have to look into that :-)
>
> Dave
>
>
> > I also tried various other ways:
> > "OSProcess thisOSProcess stdOut nextPutAll: 'Hello world'."
> > "FileStream stdout nextPutAll: 'Hello world'."
> > "StandardFileStream stdout nextPutAll: 'Hello world'."
> > "TranscriptStream redirectToStdOut: true. Transcript show: 'Hello
> world'."
> > ... but so far none of them seems to work.
> > I also tried "-headless" and "-vm-display-null", but again this does not
> > seem to help.
> > Any pointer would be appreciated!
> >
> > 2017-02-22 15:49 GMT+01:00 H. Hirzel <hannes.hirzel at gmail.com>:
> >
> > > Maybe
> > >
> > >       ExternalCommandShell
> > >
> > >      http://wiki.squeak.org/squeak/6023
> > >
> > > this is of some help?
> > >
> > > --Hannes
> > >
> > > On 2/22/17, G??ran Krampe <goran at krampe.se> wrote:
> > > > On 21/02/17 20:51, Jacques Harmand wrote:
> > > >> Hi list,
> > > >> I try to use squeak to execute the following basic Smalltalk script
> (in
> > > >> a file "hello.st <http://hello.st>")
> > > >> "Transcript show: 'Hello world'; cr."
> > > >> from the command line with Squeak.  This works as expected with
> both GNU
> > > >> Smalltalk and Pharo, but with Squeak nothing happens: Squeak seems
> to
> > > >> wait forever.  If I add
> > > >> "Smalltalk snapshot: false andQuit: true."
> > > >> after the above line, the execution of the script terminates, but
> > > >> without printing anything.
> > > >
> > > > I haven't looked closely at latest Squeak (perhaps Pharo has coupled
> > > > Transcript to stdout for headless mode?), but Transcript is not the
> same
> > > > thing as stdout - so you wouldn't see anything on stdout.
> > > >
> > > > regards, G??ran
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