[Newbies] scripts

[Bert Freudenberg]

Am 26.09.2008 um 06:49 schrieb Mark Volkmann:

> On Sep 26, 2008, at 8:03 AM, Randal L. Schwartz wrote:
>
>>>>>>> "Randal" == Randal L Schwartz <merlyn at stonehenge.com> writes:
>>
>>>>>>> "Bert" == Bert Freudenberg <bert at freudenbergs.de> writes:
>> Bert> Am 26.09.2008 um 05:12 schrieb Mark Volkmann:
>>
>>>>> Is it possible to run a Squeak program from a terminal window  
>>>>> and  have
>>>>> access to the stdin and stdout streams from the Smalltalk code?
>>
>> And the longer still answer (now that I've noticed "access to stdin  
>> and
>> stdout") is to use an image with OSProcess loaded, and then you can
>> get access as follows:
>>
>>  me := ThisOSProcess thisOSProcess.
>>  stdin := me stdIn. "acts like a Stream"
>>  stdout := me stdOut.
>>  stderr := me stdErr.
>>  stderr print: Time now; cr. "put the time of day on my stderr  
>> output"
>
>
> Thanks for the example code! Now I think all I need is to find out  
> how to launch the code from a terminal window. At http://wiki.squeak.org/squeak/1914 
>  I found this.
>
> "To initiate external shell processing, evaluate  
> ''ExternalCommandShell stop'', save the image, and restart with  
> ''squeak -headless myImage''."
>
> It's not clear to me what will be run when that last command is  
> executed from a terminal window. Where would I put code like your  
> example code above and how does the squeak command know to execute it?


Perhaps you should let us know what you want to achieve in broader  
terms first. Using Squeak in a headless way to do unix-style stream  
processing is very unusual. It can be done but it is not something I  
would recommend to a beginner.

This is in contrast to many other languages which are most easily  
learned by creating simple programs writing to stdin/stdout. The power  
of Squeak is in the system (the development tools and frameworks), not  
so much the language (which is powerful, too, but not really what sets  
Squeak apart).

- Bert -