feat(tvix/nix-compat): have StorePath accept bytes

The primary constructor for this is now from_bytes, from_string is
simply calling .as_bytes() on the string, passing it along.

The InvalidName error now contains a Vec<u8>, to encode the invalid name
(which might not be a string anymore).

from_absolute_path now accepts a &[u8] (even though we might want to
make this a OSString of some sort).

StorePath::validate_name has been degraded to a pub(crate) function.
It's still used in src/derivation, even though it probably shouldn't at
all - that cleanup is left for cl/8412 though.

Change-Id: I6b4e62a6fa5c4bec13b535279e73444f0b83ad35
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8973
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>

tvix/store/src/fuse/mod.rs

@@ -19,6 +19,7 @@ use crate::{
 use fuser::{FileAttr, ReplyAttr, Request};
 use nix_compat::store_path::StorePath;
 use std::io::Read;
+use std::str::FromStr;
 use std::sync::Arc;
 use std::{collections::HashMap, time::Duration};
 use tracing::{debug, info_span, warn};
@@ -99,7 +100,7 @@ impl FUSE {
     ) -> Result<Option<(u64, Arc<InodeData>)>, Error> {
         // parse the name into a [StorePath].
         let store_path = if let Some(name) = name.to_str() {
-            match StorePath::from_string(name) {
+            match StorePath::from_str(name) {
                 Ok(store_path) => store_path,
                 Err(e) => {
                     debug!(e=?e, "unable to parse as store path");

tvix/store/src/proto/mod.rs

@@ -1,5 +1,6 @@
 #![allow(clippy::derive_partial_eq_without_eq)]
 // https://github.com/hyperium/tonic/issues/1056
+use std::str::FromStr;
 use std::{collections::HashSet, iter::Peekable};
 use thiserror::Error;
 
@@ -97,7 +98,7 @@ fn parse_node_name_root<E>(
     name: &str,
     err: fn(String, store_path::Error) -> E,
 ) -> Result<StorePath, E> {
-    match StorePath::from_string(name) {
+    match StorePath::from_str(name) {
         Ok(np) => Ok(np),
         Err(e) => Err(err(name.to_string(), e)),
     }

tvix/store/src/proto/tests/pathinfo.rs

@@ -1,6 +1,7 @@
 use crate::proto::{self, Node, PathInfo, ValidatePathInfoError};
 use lazy_static::lazy_static;
 use nix_compat::store_path::{self, StorePath};
+use std::str::FromStr;
 use test_case::test_case;
 
 lazy_static! {
@@ -46,7 +47,7 @@ fn validate_no_node(
         digest: DUMMY_DIGEST.to_vec(),
         size: 0,
     },
-    Ok(StorePath::from_string(DUMMY_NAME).expect("must succeed"));
+    Ok(StorePath::from_str(DUMMY_NAME).expect("must succeed"));
     "ok"
 )]
 #[test_case(
@@ -91,7 +92,7 @@ fn validate_directory(
         size: 0,
         executable: false,
     },
-    Ok(StorePath::from_string(DUMMY_NAME).expect("must succeed"));
+    Ok(StorePath::from_str(DUMMY_NAME).expect("must succeed"));
     "ok"
 )]
 #[test_case(
@@ -131,7 +132,7 @@ fn validate_file(t_file_node: proto::FileNode, t_result: Result<StorePath, Valid
         name: DUMMY_NAME.to_string(),
         ..Default::default()
     },
-    Ok(StorePath::from_string(DUMMY_NAME).expect("must succeed"));
+    Ok(StorePath::from_str(DUMMY_NAME).expect("must succeed"));
     "ok"
 )]
 #[test_case(