switch to using twox-hash instead due to licensing issues

Cargo.toml

@@ -101,14 +101,14 @@ toml_edit = { version = "0.22.14", features = ["serde"] }
 tracing = "0.1.40" # be compatible with rustc_log: https://github.com/rust-lang/rust/blob/e51e98dde6a/compiler/rustc_log/Cargo.toml#L9
 tracing-chrome = "0.7.2"
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
+twox-hash = "1.6.3"
 unicase = "2.7.0"
 unicode-width = "0.1.12"
 unicode-xid = "0.2.4"
 url = "2.5.0"
 varisat = "0.2.2"
 walkdir = "2.5.0"
 windows-sys = "0.52"
-xxhash-rust = { version = "0.8.10", features = ["xxh3"] }
 
 [workspace.lints.rust]
 rust_2018_idioms = "warn" # TODO: could this be removed?
@@ -200,11 +200,11 @@ toml.workspace = true
 toml_edit.workspace = true
 tracing.workspace = true
 tracing-subscriber.workspace = true
+twox-hash.workspace = true
 unicase.workspace = true
 unicode-width.workspace = true
 url.workspace = true
 walkdir.workspace = true
-xxhash-rust.workspace = true
 supports-unicode = "3.0.0"
 
 [target.'cfg(target_has_atomic = "64")'.dependencies]

src/cargo/core/compiler/fingerprint/mod.rs

@@ -381,7 +381,7 @@ use serde::de;
 use serde::ser;
 use serde::{Deserialize, Serialize};
 use tracing::{debug, info};
-use xxhash_rust::xxh3;
+use twox_hash::XxHash64;
 
 use crate::core::compiler::unit_graph::UnitDep;
 use crate::core::Package;
@@ -2523,7 +2523,7 @@ impl ChecksumAlgo {
     fn hash_len(&self) -> usize {
         match self {
             ChecksumAlgo::Sha256 => 32,
-            ChecksumAlgo::XxHash => 16,
+            ChecksumAlgo::XxHash => 8,
         }
     }
 }
@@ -2619,11 +2619,11 @@ impl Checksum {
             }
             ChecksumAlgo::XxHash => {
                 digest(
-                    xxh3::Xxh3::new(),
+                    XxHash64::with_seed(0),
                     |h, b| {
-                        h.update(b);
+                        h.write(b);
                     },
-                    |h, out| out.copy_from_slice(&h.digest128().to_be_bytes()),
+                    |h, out| out.copy_from_slice(&h.finish().to_be_bytes()),
                     contents,
                     &mut buf,
                     value,