Cargo: align rust toolchain version with internal repository

Also:
* remove new warnings raised by the rust toolchain
* run new formatting and linting
* update the rust toolchain used by `cargo`

While we keep `bazel` builds using the same toolchain as internally
(now a nightly one), I opted for using a stable toolchain for `cargo`.
The nightly toolchain is only required internally for build reasons, we
should keep not using any unstable rust features in our sources.

Author: redsun82

.bazelrc

@@ -30,6 +30,13 @@ common --registry=https://bcr.bazel.build
 
 common --@rules_dotnet//dotnet/settings:strict_deps=false
 
+# we only configure a nightly toolchain
+common --@rules_rust//rust/toolchain/channel=nightly
+
+# rust does not like the gold linker, while bazel does by default, so let's avoid using it
+common:linux --linkopt=-fuse-ld=lld
+common:macos --linkopt=-fuse-ld=lld
+
 # Reduce this eventually to empty, once we've fixed all our usages of java, and https://github.com/bazel-contrib/rules_go/issues/4193 is fixed
 common --incompatible_autoload_externally="+@rules_java,+@rules_shell"
 

MODULE.bazel

@@ -28,7 +28,7 @@ bazel_dep(name = "rules_kotlin", version = "2.1.3-codeql.1")
 bazel_dep(name = "gazelle", version = "0.40.0")
 bazel_dep(name = "rules_dotnet", version = "0.17.4")
 bazel_dep(name = "googletest", version = "1.14.0.bcr.1")
-bazel_dep(name = "rules_rust", version = "0.58.0")
+bazel_dep(name = "rules_rust", version = "0.63.0")
 bazel_dep(name = "zstd", version = "1.5.5.bcr.1")
 
 bazel_dep(name = "buildifier_prebuilt", version = "6.4.0", dev_dependency = True)
@@ -38,7 +38,10 @@ bazel_dep(name = "buildifier_prebuilt", version = "6.4.0", dev_dependency = True
 RUST_EDITION = "2024"
 
 # run buildutils-internal/scripts/fill-rust-sha256s.py when updating (internal repo)
-RUST_VERSION = "1.86.0"
+# a nightly toolchain is required to enable experimental_use_cc_common_link, which we require internally
+# we prefer to run the same version as internally, even if experimental_use_cc_common_link is not really
+# required in this repo
+RUST_VERSION = "nightly/2025-08-01"
 
 rust = use_extension("@rules_rust//rust:extensions.bzl", "rust")
 rust.toolchain(
@@ -50,26 +53,26 @@ rust.toolchain(
     ],
     # generated by buildutils-internal/scripts/fill-rust-sha256s.py (internal repo)
     sha256s = {
-        "rustc-1.86.0-x86_64-unknown-linux-gnu.tar.xz": "4438b809ce4a083af31ed17aeeedcc8fc60ccffc0625bef1926620751b6989d7",
-        "rustc-1.86.0-x86_64-apple-darwin.tar.xz": "42b76253626febb7912541a30d3379f463dec89581aad4cb72c6c04fb5a71dc5",
-        "rustc-1.86.0-aarch64-apple-darwin.tar.xz": "23b8f52102249a47ab5bc859d54c9a3cb588a3259ba3f00f557d50edeca4fde9",
-        "rustc-1.86.0-x86_64-pc-windows-msvc.tar.xz": "fdde839fea274529a31e51eb85c6df1782cc8479c9d1bc24e2914d66a0de41ab",
-        "clippy-1.86.0-x86_64-unknown-linux-gnu.tar.xz": "02aaff2c1407d2da8dba19aa4970dd873e311902b120a66cbcdbe51eb8836edf",
-        "clippy-1.86.0-x86_64-apple-darwin.tar.xz": "bb85efda7bbffaf124867f5ca36d50932b1e8f533c62ee923438afb32ff8fe9a",
-        "clippy-1.86.0-aarch64-apple-darwin.tar.xz": "239fa3a604b124f0312f2af08537874a1227dba63385484b468cca62e7c4f2f2",
-        "clippy-1.86.0-x86_64-pc-windows-msvc.tar.xz": "d00498f47d49219f032e2c5eeebdfc3d32317c0dc3d3fd7125327445bc482cb4",
-        "cargo-1.86.0-x86_64-unknown-linux-gnu.tar.xz": "c5c1590f7e9246ad9f4f97cfe26ffa92707b52a769726596a9ef81565ebd908b",
-        "cargo-1.86.0-x86_64-apple-darwin.tar.xz": "af163eb02d1a178044d1b4f2375960efd47130f795f6e33d09e345454bb26f4e",
-        "cargo-1.86.0-aarch64-apple-darwin.tar.xz": "3cb13873d48c3e1e4cc684d42c245226a11fba52af6b047c3346ed654e7a05c0",
-        "cargo-1.86.0-x86_64-pc-windows-msvc.tar.xz": "e57a9d89619b5604899bac443e68927bdd371e40f2e03e18950b6ceb3eb67966",
-        "llvm-tools-1.86.0-x86_64-unknown-linux-gnu.tar.xz": "282145ab7a63c98b625856f44b905b4dc726b497246b824632a5790debe95a78",
-        "llvm-tools-1.86.0-x86_64-apple-darwin.tar.xz": "b55706e92f7da989207c50c13c7add483a9fedd233bc431b106eca2a8f151ec9",
-        "llvm-tools-1.86.0-aarch64-apple-darwin.tar.xz": "04d3618c686845853585f036e3211eb9e18f2d290f4610a7a78bdc1fcce1ebd9",
-        "llvm-tools-1.86.0-x86_64-pc-windows-msvc.tar.xz": "721a17cc8dc219177e4277a3592253934ef08daa1e1b12eda669a67d15fad8dd",
-        "rust-std-1.86.0-x86_64-unknown-linux-gnu.tar.xz": "67be7184ea388d8ce0feaf7fdea46f1775cfc2970930264343b3089898501d37",
-        "rust-std-1.86.0-x86_64-apple-darwin.tar.xz": "3b1140d54870a080080e84700143f4a342fbd02a410a319b05d9c02e7dcf44cc",
-        "rust-std-1.86.0-aarch64-apple-darwin.tar.xz": "0fb121fb3b8fa9027d79ff598500a7e5cd086ddbc3557482ed3fdda00832c61b",
-        "rust-std-1.86.0-x86_64-pc-windows-msvc.tar.xz": "3d5354b7b9cb950b58bff3fce18a652aa374bb30c8f70caebd3bd0b43cb41a33",
+        "2025-08-01/rustc-nightly-x86_64-unknown-linux-gnu.tar.xz": "9bbeaf5d3fc7247d31463a9083aa251c995cc50662c8219e7a2254d76a72a9a4",
+        "2025-08-01/rustc-nightly-x86_64-apple-darwin.tar.xz": "c9ea539a8eff0d5d162701f99f9e1aabe14dd0dfb420d62362817a5d09219de7",
+        "2025-08-01/rustc-nightly-aarch64-apple-darwin.tar.xz": "ae83feebbc39cfd982e4ecc8297731fe79c185173aee138467b334c5404b3773",
+        "2025-08-01/rustc-nightly-x86_64-pc-windows-msvc.tar.xz": "9f170c30d802a349be60cf52ec46260802093cb1013ad667fc0d528b7b10152f",
+        "2025-08-01/clippy-nightly-x86_64-unknown-linux-gnu.tar.xz": "9ae5f3cd8f557c4f6df522597c69d14398cf604cfaed2b83e767c4b77a7eaaf6",
+        "2025-08-01/clippy-nightly-x86_64-apple-darwin.tar.xz": "983cb9ee0b6b968188e04ab2d33743d54764b2681ce565e1b3f2b9135c696a3e",
+        "2025-08-01/clippy-nightly-aarch64-apple-darwin.tar.xz": "ed2219dbc49d088225e1b7c5c4390fa295066e071fddaa2714018f6bb39ddbf0",
+        "2025-08-01/clippy-nightly-x86_64-pc-windows-msvc.tar.xz": "911f40ab5cbdd686f40e00965271fe47c4805513a308ed01f30eafb25b448a50",
+        "2025-08-01/cargo-nightly-x86_64-unknown-linux-gnu.tar.xz": "106463c284e48e4904c717471eeec2be5cc83a9d2cae8d6e948b52438cad2e69",
+        "2025-08-01/cargo-nightly-x86_64-apple-darwin.tar.xz": "6ad35c40efc41a8c531ea43235058347b6902d98a9693bf0aed7fc16d5590cef",
+        "2025-08-01/cargo-nightly-aarch64-apple-darwin.tar.xz": "dd28c365e9d298abc3154c797720ad36a0058f131265c9978b4c8e4e37012c8a",
+        "2025-08-01/cargo-nightly-x86_64-pc-windows-msvc.tar.xz": "7b431286e12d6b3834b038f078389a00cac73f351e8c3152b2504a3c06420b3b",
+        "2025-08-01/llvm-tools-nightly-x86_64-unknown-linux-gnu.tar.xz": "e342e305d7927cc288d386983b2bc253cfad3776b113386e903d0b302648ef47",
+        "2025-08-01/llvm-tools-nightly-x86_64-apple-darwin.tar.xz": "e44dd3506524d85c37b3a54bcc91d01378fd2c590b2db5c5974d12f05c1b84d1",
+        "2025-08-01/llvm-tools-nightly-aarch64-apple-darwin.tar.xz": "0c1b5f46dd81be4a9227b10283a0fcaa39c14fea7e81aea6fd6d9887ff6cdc41",
+        "2025-08-01/llvm-tools-nightly-x86_64-pc-windows-msvc.tar.xz": "423e5fd11406adccbc31b8456ceb7375ce055cdf45e90d2c3babeb2d7f58383f",
+        "2025-08-01/rust-std-nightly-x86_64-unknown-linux-gnu.tar.xz": "3c0ceb46a252647a1d4c7116d9ccae684fa5e42aaf3296419febd2c962c3b41d",
+        "2025-08-01/rust-std-nightly-x86_64-apple-darwin.tar.xz": "3be416003cab10f767390a753d1d16ae4d26c7421c03c98992cf1943e5b0efe8",
+        "2025-08-01/rust-std-nightly-aarch64-apple-darwin.tar.xz": "4046ac0ef951cb056b5028a399124f60999fa37792eab69d008d8d7965f389b4",
+        "2025-08-01/rust-std-nightly-x86_64-pc-windows-msvc.tar.xz": "191ed9d8603c3a4fe5a7bbbc2feb72049078dae2df3d3b7d5dedf3abbf823e6e",
     },
     versions = [RUST_VERSION],
 )

rust-toolchain.toml

@@ -1,8 +1,10 @@
-# This file specifies the Rust version used to develop and test the
-# extractors written in rust. It is set to the lowest version of Rust
-# we want to support.
+# This file specifies the Rust version used to develop the extractors written
+# in rust. Notice that this is just used by using `cargo`-related tools in a
+# local dev environment. The actual version used to build the released packs
+# is specified in `MODULE.bazel` in the internal repository (typically
+# reflected by `MODULE.bazel` in this repository).
 
 [toolchain]
-channel = "1.86"
+channel = "1.88"
 profile = "minimal"
 components = [ "clippy", "rustfmt" ]

rust/ast-generator/src/main.rs

@@ -23,7 +23,7 @@ fn class_name(type_name: &str) -> String {
         "AsmOptions" => "AsmOptionsList".to_owned(),
         "MacroStmts" => "MacroBlockExpr".to_owned(),
         _ if type_name.starts_with("Record") => type_name.replacen("Record", "Struct", 1),
-        _ if type_name.ends_with("Type") => format!("{}Repr", type_name),
+        _ if type_name.ends_with("Type") => format!("{type_name}Repr"),
         _ => type_name.to_owned(),
     }
 }
@@ -171,7 +171,7 @@ fn get_trait_fields(trait_name: &str) -> Vec<FieldInfo> {
         ],
         "HasArgList" => vec![FieldInfo::optional("arg_list", "ArgList")],
         "HasDocComments" => vec![],
-        _ => panic!("Unknown trait {}", trait_name),
+        _ => panic!("Unknown trait {trait_name}"),
     }
 }
 

rust/extractor/src/rust_analyzer.rs

@@ -51,7 +51,7 @@ impl<'a> RustAnalyzer<'a> {
         config: &CargoConfig,
         load_config: &LoadCargoConfig,
     ) -> Option<(RootDatabase, Vfs)> {
-        let progress = |t| (trace!("progress: {}", t));
+        let progress = |t| trace!("progress: {t}");
         let manifest = project.manifest_path();
         match load_workspace_at(manifest.as_ref(), config, load_config, &progress) {
             Ok((db, vfs, _macro_server)) => Some((db, vfs)),
@@ -67,7 +67,7 @@ impl<'a> RustAnalyzer<'a> {
     fn get_file_data(
         &self,
         path: &Path,
-    ) -> Result<(&Semantics<RootDatabase>, EditionedFileId, FileText), &str> {
+    ) -> Result<(&Semantics<'_, RootDatabase>, EditionedFileId, FileText), &str> {
         match self {
             RustAnalyzer::WithoutSemantics { reason } => Err(reason),
             RustAnalyzer::WithSemantics { vfs, semantics } => {
@@ -82,7 +82,7 @@ impl<'a> RustAnalyzer<'a> {
         }
     }
 
-    pub fn parse(&self, path: &Path) -> ParseResult {
+    pub fn parse(&self, path: &Path) -> ParseResult<'_> {
         match self.get_file_data(path) {
             Ok((semantics, file_id, input)) => {
                 let source_file = semantics.parse(file_id);

rust/extractor/src/translate/base.rs

@@ -549,9 +549,7 @@ impl<'a> Translator<'a> {
                 .map(|p| format!("[{p}; {size}]"));
         }
         if let Some(it) = ty.as_slice() {
-            return self
-                .canonical_path_from_type(it)
-                .map(|p| format!("[{}]", p));
+            return self.canonical_path_from_type(it).map(|p| format!("[{p}]"));
         }
         if let Some(it) = ty.as_builtin() {
             return Some(it.name().as_str().to_owned());
@@ -651,7 +649,7 @@ impl<'a> Translator<'a> {
         // if we have a Hir entity, it means we have semantics
         let sema = self.semantics.as_ref().unwrap();
         match item.origin(sema.db) {
-            CrateOrigin::Rustc { name } => format!("rustc:{}", name),
+            CrateOrigin::Rustc { name } => format!("rustc:{name}"),
             CrateOrigin::Local { repo, name } => format!(
                 "repo:{}:{}",
                 repo.unwrap_or_default(),
@@ -660,7 +658,7 @@ impl<'a> Translator<'a> {
             CrateOrigin::Library { repo, name } => {
                 format!("repo:{}:{}", repo.unwrap_or_default(), name)
             }
-            CrateOrigin::Lang(it) => format!("lang:{}", it),
+            CrateOrigin::Lang(it) => format!("lang:{it}"),
         }
     }
 

rust/extractor/src/trap.rs

@@ -16,7 +16,7 @@ pub trait AsTrapKeyPart {
 
 impl AsTrapKeyPart for UntypedLabel {
     fn as_key_part(&self) -> String {
-        format!("{{{}}}", self)
+        format!("{{{self}}}")
     }
 }
 

rust/rust-toolchain.toml

@@ -259,8 +259,8 @@ fn add_field_for_column_storage<'a>(
 ///    values are their integer representations.
 fn convert_nodes(
     nodes: &node_types::NodeTypeMap,
-) -> (Vec<dbscheme::Entry>, Set<&str>, Map<&str, usize>) {
-    let mut entries: Vec<dbscheme::Entry> = Vec::new();
+) -> (Vec<dbscheme::Entry<'_>>, Set<&str>, Map<&str, usize>) {
+    let mut entries = Vec::new();
     let mut ast_node_members: Set<&str> = Set::new();
     let token_kinds: Map<&str, usize> = nodes
         .iter()

shared/tree-sitter-extractor/src/generator/mod.rs

@@ -200,7 +200,7 @@ pub fn create_token_class<'a>(token_type: &'a str, tokeninfo: &'a str) -> ql::Cl
 }
 
 // Creates the `ReservedWord` class.
-pub fn create_reserved_word_class(db_name: &str) -> ql::Class {
+pub fn create_reserved_word_class(db_name: &str) -> ql::Class<'_> {
     let class_name = "ReservedWord";
     let get_a_primary_ql_class = create_get_a_primary_ql_class(class_name, true);
     ql::Class {
@@ -237,7 +237,7 @@ fn create_none_predicate<'a>(
 
 /// Creates an overridden `getAPrimaryQlClass` predicate that returns the given
 /// name.
-fn create_get_a_primary_ql_class(class_name: &str, is_final: bool) -> ql::Predicate {
+fn create_get_a_primary_ql_class(class_name: &str, is_final: bool) -> ql::Predicate<'_> {
     ql::Predicate {
         qldoc: Some(String::from(
             "Gets the name of the primary QL class for this element.",
@@ -318,7 +318,7 @@ pub fn create_get_node_file_predicate<'a>(
     }
 }
 
-pub fn create_discardable_ast_node_predicate(ast_node_name: &str) -> ql::Predicate {
+pub fn create_discardable_ast_node_predicate(ast_node_name: &str) -> ql::Predicate<'_> {
     ql::Predicate {
         name: "discardableAstNode",
         qldoc: Some(String::from(
@@ -352,7 +352,7 @@ pub fn create_discardable_ast_node_predicate(ast_node_name: &str) -> ql::Predica
     }
 }
 
-pub fn create_discard_ast_node_predicate(ast_node_name: &str) -> ql::Predicate {
+pub fn create_discard_ast_node_predicate(ast_node_name: &str) -> ql::Predicate<'_> {
     ql::Predicate {
         name: "discardAstNode",
         qldoc: Some(String::from(
@@ -692,8 +692,8 @@ fn create_field_getters<'a>(
 }
 
 /// Converts the given node types into CodeQL classes wrapping the dbscheme.
-pub fn convert_nodes(nodes: &node_types::NodeTypeMap) -> Vec<ql::TopLevel> {
-    let mut classes: Vec<ql::TopLevel> = Vec::new();
+pub fn convert_nodes(nodes: &node_types::NodeTypeMap) -> Vec<ql::TopLevel<'_>> {
+    let mut classes = Vec::new();
     let mut token_kinds = BTreeSet::new();
     for (type_name, node) in nodes {
         if let node_types::EntryKind::Token { .. } = &node.kind {