okey-cli 0.1.2

An advanced, easy-to-use key remapper for Linux
Documentation 
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use std::env;

use anyhow::{Result, anyhow};
use nix::unistd;

use crate::{cli::utils::systemctl, fs::service as fs};

pub use systemctl::{restart, status, stop};

pub fn start() -> Result<()> {
    let dir_path = fs::get_systemd_dir_path()?;
    let file_path = fs::resolve_service_file_path(&dir_path);

    if !file_path.exists() {
        return Err(anyhow!(
            "The systemd service is not installed, run 'okey service install'",
        ));
    }

    systemctl::reload_daemon()?;
    systemctl::start()?;

    Ok(())
}

pub fn install() -> Result<()> {
    let exe_path = env::current_exe()?;
    let exe_path_str = exe_path.to_string_lossy();

    let config = format!(
        r#"[Unit]
Description=Okey Service

[Service]
ExecStart={exe_path_str} start --systemd
Restart=on-failure
StandardOutput=journal
StandardError=journal
Nice=-20{}

[Install]
WantedBy=multi-user.target"#,
        if unistd::geteuid().is_root() {
            r#"
CPUSchedulingPolicy=rr
CPUSchedulingPriority=99
IOSchedulingClass=realtime
IOSchedulingPriority=0"#
        } else {
            ""
        }
    );

    fs::write_systemd_service(&config)?;

    println!("The systemd service has been installed, run 'okey service start' to start it");

    Ok(())
}

pub fn uninstall() -> Result<()> {
    let dir_path = fs::get_systemd_dir_path()?;
    let file_path = fs::resolve_service_file_path(&dir_path);

    if file_path.exists() {
        systemctl::stop()?;
        fs::remove_systemd_service()?;
        systemctl::reload_daemon()?;

        println!("The systemd service has been removed");
    } else {
        println!("The systemd service does not exist");
    }

    Ok(())
}