Remove `serde::Serialize` implementations for rkyv-able structs (#7663)

## Summary

Random, but I noticed that we can remove a ton of serialize and
deserialize derives by using `rkyv` for the flat-index caches. (We
already use `rkyv` for these same structs in the registry cache.)

crates/distribution-types/src/file.rs

@@ -21,9 +21,7 @@ pub enum FileConversionError {
 }
 
 /// Internal analog to [`pypi_types::File`].
-#[derive(
-    Debug, Clone, Hash, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize,
-)]
+#[derive(Debug, Clone, Hash, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub struct File {
     pub dist_info_metadata: bool,
@@ -68,9 +66,7 @@ impl File {
 }
 
 /// While a registry file is generally a remote URL, it can also be a file if it comes from a directory flat indexes.
-#[derive(
-    Debug, Clone, Hash, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize,
-)]
+#[derive(Debug, Clone, Hash, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub enum FileLocation {
     /// URL relative to the base URL.

crates/pypi-types/src/simple_json.rs

@@ -93,7 +93,6 @@ impl CoreMetadata {
     PartialEq,
     Eq,
     Hash,
-    Serialize,
     Deserialize,
     rkyv::Archive,
     rkyv::Deserialize,

crates/uv-cache/src/lib.rs

@@ -765,7 +765,7 @@ impl CacheBucket {
     fn to_str(self) -> &'static str {
         match self {
             Self::SourceDistributions => "sdists-v4",
-            Self::FlatIndex => "flat-index-v0",
+            Self::FlatIndex => "flat-index-v1",
             Self::Git => "git-v0",
             Self::Interpreter => "interpreter-v2",
             // Note that when bumping this, you'll also need to bump it

crates/uv-client/src/flat_index.rs

@@ -11,7 +11,7 @@ use uv_cache::{Cache, CacheBucket};
 
 use crate::cached_client::{CacheControl, CachedClientError};
 use crate::html::SimpleHtml;
-use crate::{Connectivity, Error, ErrorKind, RegistryClient};
+use crate::{Connectivity, Error, ErrorKind, OwnedArchive, RegistryClient};
 
 #[derive(Debug, thiserror::Error)]
 pub enum FlatIndexError {
@@ -170,7 +170,7 @@ impl<'a> FlatIndexClient<'a> {
                 let SimpleHtml { base, files } = SimpleHtml::parse(&text, &url)
                     .map_err(|err| Error::from_html_err(err, url.clone()))?;
 
-                let files: Vec<File> = files
+                let unarchived: Vec<File> = files
                     .into_iter()
                     .filter_map(|file| {
                         match File::try_from(file, base.as_url()) {
@@ -183,7 +183,7 @@ impl<'a> FlatIndexClient<'a> {
                         }
                     })
                     .collect();
-                Ok::<Vec<File>, CachedClientError<Error>>(files)
+                OwnedArchive::from_unarchived(&unarchived)
             }
             .boxed_local()
             .instrument(info_span!("parse_flat_index_html", url = % url))
@@ -191,7 +191,7 @@ impl<'a> FlatIndexClient<'a> {
         let response = self
             .client
             .cached_client()
-            .get_serde(
+            .get_cacheable(
                 flat_index_request,
                 &cache_entry,
                 cache_control,
@@ -201,7 +201,11 @@ impl<'a> FlatIndexClient<'a> {
         match response {
             Ok(files) => {
                 let files = files
-                    .into_iter()
+                    .iter()
+                    .map(|file| {
+                        rkyv::deserialize::<File, rkyv::rancor::Error>(file)
+                            .expect("archived version always deserializes")
+                    })
                     .filter_map(|file| {
                         Some((
                             DistFilename::try_from_normalized_filename(&file.filename)?,

crates/uv-client/src/registry_client.rs

@@ -8,7 +8,6 @@ use futures::{FutureExt, TryStreamExt};
 use http::HeaderMap;
 use reqwest::{Client, Response, StatusCode};
 use reqwest_middleware::ClientWithMiddleware;
-use serde::{Deserialize, Serialize};
 use tracing::{info_span, instrument, trace, warn, Instrument};
 use url::Url;
 
@@ -723,9 +722,7 @@ impl RegistryClient {
     }
 }
 
-#[derive(
-    Default, Debug, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize,
-)]
+#[derive(Default, Debug, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub struct VersionFiles {
     pub wheels: Vec<VersionWheel>,
@@ -756,27 +753,25 @@ impl VersionFiles {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
+#[derive(Debug, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub struct VersionWheel {
     pub name: WheelFilename,
     pub file: File,
 }
 
-#[derive(Debug, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
+#[derive(Debug, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub struct VersionSourceDist {
     pub name: SourceDistFilename,
     pub file: File,
 }
 
-#[derive(
-    Default, Debug, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize,
-)]
+#[derive(Default, Debug, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub struct SimpleMetadata(Vec<SimpleMetadatum>);
 
-#[derive(Debug, Serialize, Deserialize, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
+#[derive(Debug, rkyv::Archive, rkyv::Deserialize, rkyv::Serialize)]
 #[rkyv(derive(Debug))]
 pub struct SimpleMetadatum {
     pub version: Version,

crates/uv-normalize/src/group_name.rs

@@ -3,7 +3,7 @@ use std::fmt::{Display, Formatter};
 use std::str::FromStr;
 use std::sync::LazyLock;
 
-use serde::{Deserialize, Deserializer, Serialize};
+use serde::{Deserialize, Deserializer};
 
 use crate::{validate_and_normalize_owned, validate_and_normalize_ref, InvalidNameError};
 
@@ -12,7 +12,7 @@ use crate::{validate_and_normalize_owned, validate_and_normalize_ref, InvalidNam
 /// See:
 /// - <https://peps.python.org/pep-0735/>
 /// - <https://packaging.python.org/en/latest/specifications/name-normalization/>
-#[derive(Debug, Default, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize)]
+#[derive(Debug, Default, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct GroupName(String);
 

crates/uv-workspace/src/pyproject.rs

@@ -33,7 +33,8 @@ pub enum PyprojectTomlError {
 }
 
 /// A `pyproject.toml` as specified in PEP 517.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Deserialize, Debug, Clone)]
+#[cfg_attr(test, derive(Serialize))]
 #[serde(rename_all = "kebab-case")]
 pub struct PyProjectToml {
     /// PEP 621-compliant project metadata.
@@ -111,7 +112,8 @@ impl AsRef<[u8]> for PyProjectToml {
 /// PEP 621 project metadata (`project`).
 ///
 /// See <https://packaging.python.org/en/latest/specifications/pyproject-toml>.
-#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+#[derive(Deserialize, Debug, Clone, PartialEq)]
+#[cfg_attr(test, derive(Serialize))]
 #[serde(rename_all = "kebab-case")]
 pub struct Project {
     /// The name of the project
@@ -133,7 +135,8 @@ pub struct Project {
     pub(crate) scripts: Option<serde::de::IgnoredAny>,
 }
 
-#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
+#[derive(Deserialize, Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(test, derive(Serialize))]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct Tool {
     pub uv: Option<ToolUv>,
@@ -141,7 +144,8 @@ pub struct Tool {
 
 // NOTE(charlie): When adding fields to this struct, mark them as ignored on `Options` in
 // `crates/uv-settings/src/settings.rs`.
-#[derive(Serialize, Deserialize, OptionsMetadata, Debug, Clone, PartialEq, Eq)]
+#[derive(Deserialize, OptionsMetadata, Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(test, derive(Serialize))]
 #[serde(rename_all = "kebab-case")]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 pub struct ToolUv {
@@ -287,9 +291,9 @@ pub struct ToolUv {
     pub constraint_dependencies: Option<Vec<pep508_rs::Requirement<VerbatimParsedUrl>>>,
 }
 
-#[derive(Serialize, Default, Debug, Clone, PartialEq, Eq)]
+#[derive(Default, Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(test, derive(Serialize))]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
-#[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct ToolUvSources(BTreeMap<PackageName, Source>);
 
 impl ToolUvSources {
@@ -346,7 +350,8 @@ impl<'de> serde::de::Deserialize<'de> for ToolUvSources {
     }
 }
 
-#[derive(Serialize, Deserialize, OptionsMetadata, Default, Debug, Clone, PartialEq, Eq)]
+#[derive(Deserialize, OptionsMetadata, Default, Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(test, derive(Serialize))]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
 #[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub struct ToolUvWorkspace {