pub async fn copy_hash<P, Q>(cache: P, sri: &Integrity, to: Q) -> Result<u64>
Expand description
Copies a cache data by hash to a specified location. Returns the number of bytes copied.
§Example
use async_std::prelude::*;
use async_attributes;
#[async_attributes::main]
async fn main() -> cacache::Result<()> {
let sri = cacache::write("./my-cache", "my-key", b"hello world").await?;
cacache::copy_hash("./my-cache", &sri, "./data.txt").await?;
Ok(())
}