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use crate::hbm::HalfBytesMask;
use camino::Utf8PathBuf;
use once_cell::sync::Lazy;
pub struct StoreSpec {
/// path to store without trailing slash
pub path_to_store: Utf8PathBuf,
/// compressed map of allowed ASCII characters in hash part
pub valid_hashbytes: HalfBytesMask,
/// compressed map of allowed ASCII characters in part after hash
pub valid_restbytes: HalfBytesMask,
/// exact length of hash part of store paths
pub hashbytes_len: u8,
}
impl StoreSpec {
pub(crate) fn check_rest(&self, rest: &[u8]) -> bool {
let hbl = self.hashbytes_len.into();
rest.iter()
.take(hbl)
.take_while(|&&i| self.valid_hashbytes.contains(i))
.count()
== hbl
}
}
pub static SPEC_DFL_NIX2: Lazy<StoreSpec> = Lazy::new(|| StoreSpec {
path_to_store: "/nix/store".into(),
valid_hashbytes: HalfBytesMask::B32_REVSHA256,
valid_restbytes: HalfBytesMask::from_bytes(
b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-._?=",
),
hashbytes_len: 32,
});
pub static SPEC_DFL_YZIX1: Lazy<StoreSpec> = Lazy::new(|| StoreSpec {
path_to_store: "/yzixs".into(),
valid_hashbytes: HalfBytesMask::B64_BLAKE2B256,
valid_restbytes: HalfBytesMask::from_bytes(
b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-._?=",
),
hashbytes_len: 43,
});
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