Guile shebang is rejected due to \

[aecepoglu]

I have guile scripts I use as CLI programs which have shebangs like so:

#! /usr/local/bin/guile \
-e main -s
!#
(define (main args)
  (write args)
  (newline))

https://www.gnu.org/software/guile/manual/html_node/Command-Line-Handling.html

This syntax isn't supported by parinfer-rust because it doesn't like \ in line ends.

Is this intended?

[eraserhd]

I definitely want to support this case.

It looks like we support lisp block comments starting with #| but not #!, and we don't have any special handling of the first two characters of the file.

In addition, Guile appears to be unique in ignoring up until a closing !#:

• Gambit ignores the line starting with #! if at the beginning of a file, except to look for a token indicating the file's sublanguage.
• Chicken ignores to end-of-line anywhere in the file it sees #! that is not one of #!optional, #!key, #!rest, and #!eof.
• Gerbil seems to ignore the first line if it starts with #!.

So, I propose:

• Ignore the first line always if the file starts with #!.
• Add a --guile-shebang option that ignores until !# (instead of newline) after the shebang.

And maybe:

• Add a --language guile option that selects scheme defaults but also enables --guile-shebang option.

[mnacamura]

Another example of multiline shebang in a Scheme implementation:

#!/bin/sh
:; exec gosh -- $0 "$@"

See Gauche manual sec. 3.3.

EDIT: This shebang is single line! I could not be aware of the slick technique. Sorry to bother you.

[aecepoglu]

Thanks :)