helpers4 0.0.6

General-purpose Rust helpers, one crate, one feature per module (string, array, ...)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

// This file is part of helpers4.
// Copyright (C) 2025 baxyz
// SPDX-License-Identifier: LGPL-3.0-or-later

//! A throw-away directory for tests that touch the file system. Not part of the API.

use std::path::{Path, PathBuf};
use std::sync::atomic::{AtomicU64, Ordering};

static COUNTER: AtomicU64 = AtomicU64::new(0);

/// A fresh, empty directory under the system temp dir, removed when dropped.
pub(crate) struct Scratch {
    dir: PathBuf,
}

impl Scratch {
    pub(crate) fn new(label: &str) -> Self {
        let n = COUNTER.fetch_add(1, Ordering::Relaxed);
        let dir =
            std::env::temp_dir().join(format!("helpers4-fs-{}-{label}-{n}", std::process::id()));
        std::fs::create_dir_all(&dir).unwrap();
        Self { dir }
    }

    pub(crate) fn path(&self) -> &Path {
        &self.dir
    }
}

impl Drop for Scratch {
    fn drop(&mut self) {
        let _ = std::fs::remove_dir_all(&self.dir);
    }
}