bitcoinkernel 0.2.1

Safe Rust bindings to libbitcoinkernel
Documentation 
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use std::sync::atomic::{AtomicU64, Ordering};
use std::{env, fs, path::PathBuf};

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

// Utility to create temporary directories that are cleaned on drop. Duplicated in `src/test_utils.rs` and `tests/common/mod.rs`.
pub struct TempDir {
    data_dir: PathBuf,
    blocks_dir: PathBuf,
}

impl TempDir {
    pub fn new(name: &str) -> Self {
        let id = COUNTER.fetch_add(1, Ordering::Relaxed);

        let data_dir = env::temp_dir().join(format!("{name}_{id}"));
        let blocks_dir = data_dir.join("blocks");

        fs::create_dir_all(&blocks_dir).expect("failed to create temp dir");

        Self {
            data_dir,
            blocks_dir,
        }
    }

    pub fn data_dir(&self) -> &str {
        self.data_dir
            .to_str()
            .expect("temp dir path is not valid UTF-8")
    }

    pub fn blocks_dir(&self) -> &str {
        self.blocks_dir
            .to_str()
            .expect("temp dir path is not valid UTF-8")
    }
}

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