by ronjouch on 2/6/24, 10:41 AM with 35 comments
by hawski on 2/7/24, 7:16 PM
For example I put this in front of my test C files:
#if 0
set -e; [ "$0" -nt "$0.bin" ] &&
gcc -Wall -Wextra -pedantic -std=c99 "$0" -o "$0.bin"
exec "$0.bin" "$@"
#endif
In the past when Python 3 was still not obviously there and under different names it was once useful for me to have this on top of a python script:
"set" "-e"
"exec" "$(for p in python3.7 python3 python; do which p && break; done)" "$0"
"$@"
You can also use the trick with Makefiles, although I never needed to use it:
#\
set -e
#\
exec make -f "$0" "$@"
by mirekrusin on 2/7/24, 10:52 PM
But that's not going to happen.
So next best option is probably weirdly a markdown file executor which runs triple quoted blocks.
The upside is that you could mix different languages, which is interesting.
by IshKebab on 2/7/24, 7:24 PM
The only systems I know of that do that properly are Deno and I believe F#, though I haven't tried the latter.
Unfortunately Deno has a stupid issue where `deno run` will check for updates and print a "new version of Deno is available" message which rather sours the otherwise great experience of using it for shell scripting.
by ComputerGuru on 2/7/24, 6:42 PM
It's not a universal "for all compiled langs," but I published a two-liner [0] with zero (non-standard) dependencies or pre-requisites that can be copy-and-pasted to the top of any rust code to turn it into an executable script (cached! also correctly cache-invalidating!) back in 2020.
It even lets you optionally omit the `fn main() { ... }` surrounding your code as well, if you really want to feel like you're just shell scripting <insert appropriate emoji here>.
It's an example of "polyglot source code" that is valid under two languages at once (in this case, standard sh and rust), (ab)using the rust `#[allow(...)]` "macro" to do double-duty as a shell script comment opener.
by foobarqux on 2/7/24, 8:41 PM
#!/usr/bin/env -S PIP_RUN_RETENTION_STRATEGY=persist pip-run
# Requirements:
# pendulum>=1.0.0
# requests
import requests
print('hello')by 12_throw_away on 2/7/24, 7:21 PM
[1] https://rust-lang.github.io/rfcs/3424-cargo-script.html#prio...
by mise_en_place on 2/7/24, 11:18 PM
by elitepleb on 2/7/24, 6:58 PM
by UncleOxidant on 2/7/24, 6:40 PM
by ronjouch on 2/6/24, 10:42 AM
by lambdaba on 2/7/24, 7:20 PM
#!/usr/bin/env nix-shell
#![allow()] /*
#!nix-shell -i bash -p rustc
rsfile="$(readlink -f $0)"
binfile="/tmp/$(basename "$rsfile").bin"
rustc "$rsfile" -o "$binfile" --edition=2021 && exec "$binfile" $@ || exit $?
*/
fn main() {
for argument in std::env::args().skip(1) {
println!("{}", argument);
};
println!("{}", std::env::var("HOME").expect(""));
}
#! /usr/bin/env nix-shell
#! nix-shell -p "haskellPackages.ghcWithPackages (p: with p; [turtle])" -i runghc
{-# LANGUAGE OverloadedStrings #-}
import Turtle
main = echo "Hello world!"
by zx8080 on 2/7/24, 11:10 PM