Huh?

main.rs

use std::io::{BufWriter, Write};
use std::process::{Command, Stdio};
use std::path::Path;

fn main() {
    let args = std::env::args().skip(1).collect::<Vec<String>>();

    if args.len() == 1 && Path::new(&args[0]).exists() {
        let path = Path::new(&args[0]);

        let command = format!(r#"
if application "Typora" is running then
    tell application "System Events"
        tell process "Typora"
            set frontmost to true
        end tell
        tell application "Typora"
            open "{0}"
        end tell
    end tell
else
    tell application "Typora" to activate
    tell application "System Events"
        tell process "Typora"
            set frontmost to true
        end tell
        tell application "Typora"
            open "{0}"
        end tell
    end tell
end if
        "#, path.canonicalize().unwrap().display());
    
    
        let com = Command::new("osascript")
            .stdout(Stdio::null())
            .stdin(Stdio::piped())
            .spawn().unwrap();

        let mut outstdin = com.stdin.unwrap();
        let mut writer = BufWriter::new(&mut outstdin);

        writer.write_all(command.as_bytes()).unwrap();
    }

    
    return;
}