gst & scripting

gst version:  3.0.3
Linux dist:  Debian/testing

I have a few questions about suing gst for scripting:

1.  Can gst be used in #! type scripts ?  Based on what I recall from a 3-4
years ago, it was possible to do so, but I am unable to find the syntax that is
correct for it.

2. Presuming the syntax is #!/usr/bin/gst,  using smalltalk-mode.el to work on
a script, I run into the problem that after I type the "#", pressing the "!"
key will not print anything on the screen.  Is there something I am doing wrong
?  Probably the assumption in #1 is incorrect ?

cheers,

     mehul


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> 1.  Can gst be used in #! type scripts ?  Based on what I recall from a
> 3-4 years ago, it was possible to do so, but I am unable to find the
> syntax that is correct for it.

Yes, the suggested one is this:

#! /bin/sh
"exec" "gst" "-f" "$0" "$@"

which finds gst in the path.  The quotes make the shell command look
like a comment to gst.

> 2. Presuming the syntax is #!/usr/bin/gst,  using smalltalk-mode.el to
> work on a script, I run into the problem that after I type the "#",
> pressing the "!" key will not print anything on the screen.  Is there
> something I am doing wrong ?  Probably the assumption in #1 is incorrect ?

It's a bug in smalltalk mode.

Paolo


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Paolo Bonzini said the following on 12/08/2008 12:58 PM:

This seems to work, though still need the ability to add "!".


>> 2. Presuming the syntax is #!/usr/bin/gst,  using smalltalk-mode.el to
>> work on a script, I run into the problem that after I type the "#",
>> pressing the "!" key will not print anything on the screen.  Is there
>> something I am doing wrong ?  Probably the assumption in #1 is incorrect ?
>
> It's a bug in smalltalk mode.
>

Any known work arounds ?





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> Any known work arounds ?

I think if you write '#! and then delete the quote it works, but I have
not tried.  I'll work on a fix soon.

BTW, the bug is there because ! is associated to "move past the end of
this method" for analogy with the old syntax.  If you are in the
following situation

   a: n [
       blah blah "Point at the end of this line"
   ]

   b: m [
   ]

Then ! will move just before "b: m".

Paolo


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For emacs smalltalk mode,

creating new/another mode for  new syntax could be bad choice? Just curious,
for I think it's easier than maintaining two syntax in single mode.

----- Original Message -----
   From: Paolo Bonzini <[hidden email]>
   To: [hidden email], gnu smalltalk <[hidden email]>
   Sent: 08-12-09 19:59:39
   Subject: Re: [Help-smalltalk] gst & scripting

 
> Any known work arounds ?

I think if you write '#! and then delete the quote it works, but I have
not tried.  I'll work on a fix soon.

BTW, the bug is there because ! is associated to "move past the end of
this method" for analogy with the old syntax.  If you are in the
following situation

   a: n [
       blah blah "Point at the end of this line"
   ]

   b: m [
   ]

Then ! will move just before "b: m".

Paolo


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I just tested with #!/usr/bin/env gst and #!/opt/local/bin/gst

It works fine with both, except the latter is specific to my
installation (macports).

On Mon, Dec 8, 2008 at 18:58, Paolo Bonzini <[hidden email]> wrote:
--
Damien Pollet
type less, do more [ | ] http://people.untyped.org/damien.pollet


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Damien Pollet wrote:
> I just tested with #!/usr/bin/env gst and #!/opt/local/bin/gst
>
> It works fine with both, except the latter is specific to my
> installation (macports).

It should be

  #! /usr/bin/env gst -f

to pass command-line arguments and shut up the garbage collection
message.  However, passing more than one argument on the #! lines is not
portable.  It would work instead to use

  #! /path/to/gst -f

but as you said it is not portable.

So that's why someone (not me, I don't remember who it was) concocted...

>> #! /bin/sh
>> "exec" "gst" "-f" "$0" "$@"

... this one, which is actually quite elegant.  It is similar to how Tcl
scripts are invoked with

  #! /bin/sh
  # Tcl sees the next line as a continuation of the comment \
  exec wish "$0" "$@"

Paolo


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Paolo Bonzini wrote:
It's also similar to where we ended up for Scheme scripts (using, in
this instance, mzscheme):


"true" ;exec env mzscheme -mv -f "$0" -e "(apply script-main \"`dirname
$0`\" (vector->list argv))" -- "$@"


Cheers,
  Tony



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