hl-engine 0.1.0

Safe Rust lifecycle API for the standalone HL Linux guest engine
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use std::{
    fs::{self, OpenOptions},
    io::Write,
    path::{Path, PathBuf},
    sync::atomic::{AtomicU64, Ordering},
};
static UNIQUE: AtomicU64 = AtomicU64::new(0);

#[derive(Debug)]
pub(crate) struct ConfigFile {
    path: PathBuf,
}
impl ConfigFile {
    pub(crate) fn create(bytes: &[u8]) -> std::io::Result<Self> {
        use std::os::unix::fs::OpenOptionsExt;
        let path = std::env::temp_dir().join(format!(
            "hl-engine-config-{}-{}",
            std::process::id(),
            UNIQUE.fetch_add(1, Ordering::Relaxed)
        ));
        let mut file = OpenOptions::new()
            .write(true)
            .create_new(true)
            .mode(0o600)
            .open(&path)?;
        file.write_all(bytes)?;
        file.sync_all()?;
        Ok(Self { path })
    }
    pub(crate) fn path(&self) -> &Path {
        &self.path
    }
}
impl Drop for ConfigFile {
    fn drop(&mut self) {
        let _ = fs::remove_file(&self.path);
    }
}