Fix some nightly lints (#15028)

Apply fixes for some `cargo check` and `cargo clippy` lints that are on
in nightly Rust.

The following command now passes, the blanket allows had to many
false-positives:

```
cargo +nightly clippy -- -A clippy::doc_markdown -A mismatched_lifetime_syntaxes -A clippy::explicit_deref_methods
```

`cargo +nightly check -- -A mismatched_lifetime_syntaxes` now passes
without warnings.

crates/uv-platform-tags/src/language_tag.rs

@@ -140,12 +140,10 @@ impl FromStr for LanguageTag {
             Ok(Self::None)
         } else if let Some(py) = s.strip_prefix("py") {
             match py.len() {
-                0 => {
+                0 => Err(ParseLanguageTagError::MissingMajorVersion {
-                    return Err(ParseLanguageTagError::MissingMajorVersion {
                     implementation: "Python",
                     tag: s.to_string(),
-                    });
+                }),
-                }
                 1 => {
                     // Ex) `py3`
                     let major = py

crates/uv-resolver/src/lock/export/pylock_toml.rs

@@ -1606,7 +1606,7 @@ impl PylockTomlArchive {
                 }
             }
         } else {
-            return Err(PylockTomlErrorKind::ArchiveMissingPathUrl(name.clone()));
+            Err(PylockTomlErrorKind::ArchiveMissingPathUrl(name.clone()))
         }
     }
 
@@ -1631,7 +1631,7 @@ impl PylockTomlArchive {
             let ext = DistExtension::from_path(filename)?;
             Ok(matches!(ext, DistExtension::Wheel))
         } else {
-            return Err(PylockTomlErrorKind::ArchiveMissingPathUrl(name.clone()));
+            Err(PylockTomlErrorKind::ArchiveMissingPathUrl(name.clone()))
         }
     }
 }

crates/uv-resolver/src/lock/mod.rs

@@ -1,6 +1,5 @@
 use std::borrow::Cow;
 use std::collections::{BTreeMap, BTreeSet, VecDeque};
-use std::convert::Infallible;
 use std::error::Error;
 use std::fmt::{Debug, Display, Formatter};
 use std::io;
@@ -3907,7 +3906,7 @@ struct SourceDistMetadata {
 /// future, so this should be treated as only a hint to where to look
 /// and/or recording where the source dist file originally came from.
 #[derive(Clone, Debug, serde::Deserialize, PartialEq, Eq)]
-#[serde(try_from = "SourceDistWire")]
+#[serde(from = "SourceDistWire")]
 enum SourceDist {
     Url {
         url: UrlString,
@@ -4206,17 +4205,15 @@ impl SourceDist {
     }
 }
 
-impl TryFrom<SourceDistWire> for SourceDist {
+impl From<SourceDistWire> for SourceDist {
-    type Error = Infallible;
+    fn from(wire: SourceDistWire) -> SourceDist {
-
-    fn try_from(wire: SourceDistWire) -> Result<SourceDist, Infallible> {
         match wire {
-            SourceDistWire::Url { url, metadata } => Ok(SourceDist::Url { url, metadata }),
+            SourceDistWire::Url { url, metadata } => SourceDist::Url { url, metadata },
-            SourceDistWire::Path { path, metadata } => Ok(SourceDist::Path {
+            SourceDistWire::Path { path, metadata } => SourceDist::Path {
                 path: path.into(),
                 metadata,
-            }),
+            },
-            SourceDistWire::Metadata { metadata } => Ok(SourceDist::Metadata { metadata }),
+            SourceDistWire::Metadata { metadata } => SourceDist::Metadata { metadata },
         }
     }
 }

crates/uv-resolver/src/resolver/mod.rs

@@ -523,8 +523,7 @@ impl<InstalledPackages: InstalledPackagesProvider> ResolverState<InstalledPackag
                     )?;
 
                     // Pick the next compatible version.
-                    let version = match decision {
+                    let Some(version) = decision else {
-                        None => {
                         debug!("No compatible version found for: {next_package}");
 
                         let term_intersection = state
@@ -536,13 +535,13 @@ impl<InstalledPackages: InstalledPackagesProvider> ResolverState<InstalledPackag
                         if let PubGrubPackageInner::Package { name, .. } = &**next_package {
                             // Check if the decision was due to the package being unavailable
                             if let Some(entry) = self.unavailable_packages.get(name) {
-                                    state.pubgrub.add_incompatibility(
+                                state
-                                        Incompatibility::custom_term(
+                                    .pubgrub
+                                    .add_incompatibility(Incompatibility::custom_term(
                                         next_id,
                                         term_intersection.clone(),
                                         UnavailableReason::Package(entry.clone()),
-                                        ),
+                                    ));
-                                    );
                                 continue;
                             }
                         }
@@ -554,8 +553,6 @@ impl<InstalledPackages: InstalledPackagesProvider> ResolverState<InstalledPackag
                                 term_intersection.clone(),
                             ));
                         continue;
-                        }
-                        Some(version) => version,
                     };
 
                     let version = match version {

crates/uv/src/commands/project/sync.rs

@@ -248,7 +248,7 @@ pub(crate) async fn sync(
                 });
 
             match update_environment(
-                Deref::deref(&environment).clone(),
+                environment.clone(),
                 spec,
                 modifications,
                 build_constraints.unwrap_or_default(),

crates/uv/src/settings.rs

@@ -1437,9 +1437,9 @@ impl AddSettings {
 
         // Warn user if an ambiguous relative path was passed as a value for
         // `--index` or `--default-index`.
-        indexes
+        for index in &indexes {
-            .iter()
+            index.url().warn_on_disambiguated_relative_path();
-            .for_each(|index| index.url().warn_on_disambiguated_relative_path());
+        }
 
         // If the user passed an `--index-url` or `--extra-index-url`, warn.
         if installer