[r6rs-discuss] [Formal] "#! /usr/bin/env" is not "portable." It's Unix-specific.

[Jens Axel Søgaard]

AndrevanTonder skrev:
> On Wed, 15 Nov 2006, Jens Axel Søgaard wrote:
> 
>> If we don't treat the first line specially, then all one-liners
>> become two-file scripts in Unix.
> 
> Not necessarily.  The draft does not require scripts to be whole files.
> As a result, while the Unix script starts on the first line, we are 
> entitled to regard the Scheme script as starting on the next line of the 
> same file.  The first line of the Unix script is the #!, while the first 
> line of the Scheme script is whatever comes next.  In this view, R6RS 
> has to specify the Scheme script, but can avoid specifying the first 
> line of the Unix file, which is then not part of the Scheme script.

I think we agree? I was trying to argue that the draft does indeed 
specify the right thing.

Here is the context:

Jens Axel Søgaard wrote:
 > Niels Holm wrote
 > > Ignoring the first line would open the door to a lot of bad
 > > surprises for people who start learning Scheme.

 > In practise, implementations will probably only ignore the
 > first line, if it starts with a #!

 > > Plus it would make all one-liners two-liners, which I think
 > > would be rather inelegant.

 > If we don't treat the first line specially, then all one-liners
 > become two-file scripts in Unix.

-- 
Jens Axel Søgaard