Function prepare_shared_runtime_upper_root

src/pglite/base.rs:1933–1971

(src_runtime: &Path, paths: &PglitePaths)

}

fn prepare_shared_runtime_upper_root(src_runtime: &Path, paths: &PglitePaths) -> Result<()> {
    let _phase = timing::phase("runtime.mountfs_upper_root");
    let dest_runtime = paths.runtime_root();

    {
        let _phase = timing::phase("runtime.mountfs_upper_dirs");
        for path in [
            dest_runtime.to_path_buf(),
            dest_runtime.join("home"),
            dest_runtime.join("dev"),
        ] {
            fs::create_dir_all(&path).with_context(|| format!("create {}", path.display()))?;
        }
    }

    {
        let _phase = timing::phase("runtime.mountfs_upper_reset");
        reset_dir(&dest_runtime.join("tmp"))?;
        reset_dir(&dest_runtime.join("dev/shm"))?;
    }

    {
        let _phase = timing::phase("runtime.mountfs_upper_identity");
        copy_runtime_file_if_exists(src_runtime.join("password"), dest_runtime.join("password"))?;
    }

    fs::write(dest_runtime.join(MOUNTFS_RUNTIME_MARKER), b"mountfs\n").with_context(|| {
        format!(
            "write {}",
            dest_runtime.join(MOUNTFS_RUNTIME_MARKER).display()
        )
    })?;
    write_runtime_layout_manifest(
        &dest_runtime,
        RuntimeLayoutKind::SharedRuntimeOverlay,
        &runtime_cache_key()?,
    )?;
    Ok(())
}

fn reset_dir(path: &Path) -> Result<()> {
    if path.exists() {