cargo-allow 0.1.3

use std::fs;
use std::path::PathBuf;
use std::sync::atomic::{AtomicUsize, Ordering};

static NEXT_MIGRATE_FIXTURE: AtomicUsize = AtomicUsize::new(0);

pub(crate) fn migrate_fixture_dir() -> PathBuf {
    let id = NEXT_MIGRATE_FIXTURE.fetch_add(1, Ordering::Relaxed);
    let stamp = std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH)
        .map(|duration| duration.as_nanos())
        .unwrap_or(0);
    let dir = std::env::temp_dir().join(format!(
        "cargo-allow-cli-migrate-{}-{stamp}-{id}",
        std::process::id()
    ));
    fs::create_dir_all(&dir)
        .unwrap_or_else(|err| std::panic::panic_any(format!("fixture dir: {err}")));
    dir
}