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Speaking of funny shebangs, I came up with this to shell execute prolog .pl files, but it should work for any scripting language that has /**/-comments but does

Speaking of funny shebangs, I came up with this to shell execute prolog .pl files, but it should work for any scripting language that has /**/-comments but doesn't support #-comments or #! shebangs specifically: /*usr/bin/env scryer-prolog "$0" "$@" ; exit #*/ From my original comment https://github.com/mthom/scryer-prolog/issues/2170#issuecomment-1821713993 https://github.com/mthom/scryer-prolog/issues/2170#issuecomm... : > The way this works is that this test.pl is both a valid shell file and prolog file. When executing as shell the first line finds and executes /usr/bin/env after searching for the glob pattern /*usr/bin/env. env then executes scryer-prolog "test.pl" which runs the prolog file as a module and halts; of course prolog ignores the first line as a comment /* ... */. Then the shell continues and executes the next command after ; which is exit which stops execution so the rest of the file (which is not valid shell) is ignored. The # makes the shell evaluator ignore prolog comment closer */ to prevent it from printing an error. This may be the best and worst thing I have ever created.

upghost 2y ago
Oh my god this is amazing. We need to fix some of the IO redirect in Scryer and then this will be a perfect replacement for bash scripts <3 You rock!
emmelaich 2y ago
Similarly, make go source executable : https://unix.stackexchange.com/questions/162531/shebang-starting-with https://unix.stackexchange.com/questions/162531/shebang-star... also, my contribution, make C programs executable: $ cat cute-use-of-slash-slash.c //usr/bin/env sh -c 'p=$(expr '"_$0"' : "_$.*$\.[^.]*"); make $p > /dev/null && $p'; exit #include <stdio.h> int main() { puts("hello world"); } $ chmod +x cute-use-of-slash-slash.c $ ./cute-use-of-slash-slash.c hello world $ $(pwd)/cute-use-of-slash-slash.c hello world $ ../cc/cute-use-of-slash-slash.c hello world $ sed -i -e s/hello/bye/ cute-use-of-slash-slash.c $ ./cute-use-of-slash-slash.c bye world $
mzs 2y ago
I didn't think of this but I use it: % ./hworld.tcl Hello, world. % cat hworld.tcl #!/bin/sh # the next line restarts using tcl \ exec tclsh "$0" "$@" puts "Hello, world." % Turns-out that in TCL you can line continue a comment :)

upghost 2y ago

Oh my god this is amazing. We need to fix some of the IO redirect in Scryer and then this will be a perfect replacement for bash scripts <3 You rock!

emmelaich 2y ago

Similarly, make go source executable : https://unix.stackexchange.com/questions/162531/shebang-starting-with https://unix.stackexchange.com/questions/162531/shebang-star... also, my contribution, make C programs executable: $ cat cute-use-of-slash-slash.c //usr/bin/env sh -c 'p=$(expr '"_$0"' : "_$.*$\.[^.]*"); make $p > /dev/null && $p'; exit #include <stdio.h> int main() { puts("hello world"); } $ chmod +x cute-use-of-slash-slash.c $ ./cute-use-of-slash-slash.c hello world $ $(pwd)/cute-use-of-slash-slash.c hello world $ ../cc/cute-use-of-slash-slash.c hello world $ sed -i -e s/hello/bye/ cute-use-of-slash-slash.c $ ./cute-use-of-slash-slash.c bye world $

mzs 2y ago

I didn't think of this but I use it: % ./hworld.tcl Hello, world. % cat hworld.tcl #!/bin/sh # the next line restarts using tcl \ exec tclsh "$0" "$@" puts "Hello, world." % Turns-out that in TCL you can line continue a comment :)