mirror of https://github.com/zkat/cacache-rs.git
99 lines
2.1 KiB
Rust
99 lines
2.1 KiB
Rust
//! Functions for reading from cache.
|
|
use std::path::Path;
|
|
|
|
use ssri::{Algorithm, Integrity};
|
|
|
|
use crate::content::read::{self, Reader};
|
|
use crate::errors::Error;
|
|
use crate::index::{self, Entry};
|
|
|
|
pub struct Get {
|
|
reader: Reader,
|
|
}
|
|
|
|
impl std::io::Read for Get {
|
|
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
|
|
self.reader.read(buf)
|
|
}
|
|
}
|
|
|
|
impl Get {
|
|
pub fn check(self) -> Result<Algorithm, Error> {
|
|
self.reader.check()
|
|
}
|
|
}
|
|
|
|
pub fn open<P, K>(cache: P, key: K) -> Result<Get, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
K: AsRef<str>,
|
|
{
|
|
if let Some(entry) = index::find(cache.as_ref(), key.as_ref())? {
|
|
let reader = read::open(cache.as_ref(), entry.integrity)?;
|
|
Ok(Get { reader })
|
|
} else {
|
|
Err(Error::NotFound)
|
|
}
|
|
}
|
|
|
|
pub fn open_hash<P>(cache: P, sri: Integrity) -> Result<Get, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
{
|
|
Ok(Get {
|
|
reader: read::open(cache.as_ref(), sri)?,
|
|
})
|
|
}
|
|
|
|
pub fn read<P, K>(cache: P, key: K) -> Result<Vec<u8>, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
K: AsRef<str>,
|
|
{
|
|
if let Some(entry) = index::find(cache.as_ref(), key.as_ref())? {
|
|
read_hash(cache, &entry.integrity)
|
|
} else {
|
|
Err(Error::NotFound)
|
|
}
|
|
}
|
|
|
|
pub fn read_hash<P>(cache: P, sri: &Integrity) -> Result<Vec<u8>, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
{
|
|
Ok(read::read(cache.as_ref(), sri)?)
|
|
}
|
|
|
|
pub fn copy<P, K, Q>(cache: P, key: K, to: Q) -> Result<u64, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
K: AsRef<str>,
|
|
Q: AsRef<Path>,
|
|
{
|
|
if let Some(entry) = index::find(cache.as_ref(), key.as_ref())? {
|
|
copy_hash(cache, &entry.integrity, to)
|
|
} else {
|
|
Err(Error::NotFound)
|
|
}
|
|
}
|
|
|
|
pub fn copy_hash<P, Q>(cache: P, sri: &Integrity, to: Q) -> Result<u64, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
Q: AsRef<Path>,
|
|
{
|
|
read::copy(cache.as_ref(), sri, to.as_ref())
|
|
}
|
|
|
|
pub fn info<P, K>(cache: P, key: K) -> Result<Option<Entry>, Error>
|
|
where
|
|
P: AsRef<Path>,
|
|
K: AsRef<str>,
|
|
{
|
|
index::find(cache.as_ref(), key.as_ref())
|
|
}
|
|
|
|
pub fn hash_exists<P: AsRef<Path>>(cache: P, sri: &Integrity) -> bool {
|
|
read::has_content(cache.as_ref(), &sri).is_some()
|
|
}
|