[fpc-pascal] run pascal programs as scripts

[Mark Morgan Lloyd]

Michael Van Canneyt wrote:
> On Thu, 24 Mar 2011, Mattias Gaertner wrote:
> 
>> Hi all,
>>
>> I would like to execute small pascal programs like normal unix
>> scripts. For example:
>>
>> #!/usr/bin/instantfpc
>> begin
>>  writeln('shebang executed');
>> end.
>>
>> Has anyone already written a tool, that compiles and
>> runs the program?
> 
> As far as I know, the "!/something just means, start /something, and 
> pass current filename as a commandline param ?

In general, "pass all parameters" allowing that unix doctrine expects an 
implicit zeroeth parameter which is the name of the current program.

> So all your tool has to do is write all except the first line to a temp 
> file, compile temp file and execute it ?

If I recall correctly, Rexx has special handling for the first line 
which- intentionally or otherwise- facilitates shebang handling. Also 
I'm reminded of a Perl option which causes it to throw away anything 
before valid scripting.

Would it be feasible to modify FPC so that it discarded everything 
preceding "program", "unit" etc?

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

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