[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: compilability of scripts
>>>>> "Marc" == Marc Feeley <feeley@xxxxxxxxxxxxxxxx> writes:
Marc> the syntax of the shell part of the script should be a well
Marc> defined subset of the shell syntax, for example always of the form:
Marc> exec scheme-script "$0" --call <identifier> "$@"
We'll put something like this in the next revision.
Marc> 2) Use the compiler to generate a "FASL file" (a compiled
Marc> representation of "S.scm" that can be loaded quickly), say
Marc> "S.fasl". This can be a bytecode file, a binary file, heap image,
Marc> etc. Scheme implementations which can generate FASL files
Marc> typically allow loading the file with (load "S.fasl") or a command
Marc> line option. Note that it is possible to define "scheme-script" so
Marc> that when
Marc> S.scm arg1 arg2 arg3
Marc> calls "scheme-script S.scm ...", it will load the file "S.fasl"
Marc> instead of "S.scm" if "S.fasl" exists. For this to work and be
Marc> portable, SRFI 22 would have to define the filename extension of
Marc> FASL files, or specify that an implementation dependent search is
Marc> performed for a file to load with the same base name (i.e. "S").
Marc> Alternatively, this search for the file to load could be done by
Marc> "scheme-script" only if the script file argument has no extension
Marc> (under UNIX you can only invoke a script with the same extension as
Marc> its filename, but under Windows, scripts must have the extension
Marc> ".BAT" or ".CMD" and can be invoked with or without the extension).
Marc> So, a script "S.scm" will always load "S.scm", but a script "S" may
Marc> load "S.fasl", "S.foobar", "S.bat", "S", etc.
Is it really necessary to put something like this in the SRFI
document? After all, the details of this are likely
necessarily implementation-dependent, and the SRFI surely doesn't
prevent an implementation from supporting something like this
without losing portability of the script source code.
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla