fix(cargo-lints): Don't rewrite dash to underscore in lint name

src/cargo/core/workspace.rs

@@ -1161,7 +1161,6 @@ impl<'gctx> Workspace<'gctx> {
             .cloned()
             .unwrap_or_default()
             .into_iter()
-            .map(|(k, v)| (k.replace('-', "_"), v))
             .collect();
 
         for (path, maybe_pkg) in &self.packages.packages {
@@ -1214,10 +1213,6 @@ impl<'gctx> Workspace<'gctx> {
             .get("cargo")
             .cloned()
             .unwrap_or(manifest::TomlToolLints::default());
-        let normalized_lints = cargo_lints
-            .into_iter()
-            .map(|(name, lint)| (name.replace('-', "_"), lint))
-            .collect();
 
         // We should only be using workspace lints if the `[lints]` table is
         // present in the manifest, and `workspace` is set to `true`
@@ -1242,7 +1237,7 @@ impl<'gctx> Workspace<'gctx> {
         analyze_cargo_lints_table(
             pkg,
             &path,
-            &normalized_lints,
+            &cargo_lints,
             ws_cargo_lints,
             ws_contents,
             ws_document,
@@ -1252,7 +1247,7 @@ impl<'gctx> Workspace<'gctx> {
         check_im_a_teapot(
             pkg,
             &path,
-            &normalized_lints,
+            &cargo_lints,
             ws_cargo_lints,
             &mut error_count,
             self.gctx,
@@ -1260,7 +1255,7 @@ impl<'gctx> Workspace<'gctx> {
         check_implicit_features(
             pkg,
             &path,
-            &normalized_lints,
+            &cargo_lints,
             ws_cargo_lints,
             &mut error_count,
             self.gctx,
@@ -1268,7 +1263,7 @@ impl<'gctx> Workspace<'gctx> {
         unused_dependencies(
             pkg,
             &path,
-            &normalized_lints,
+            &cargo_lints,
             ws_cargo_lints,
             &mut error_count,
             self.gctx,

src/cargo/util/lints.rs

@@ -117,31 +117,21 @@ fn verify_feature_enabled(
     gctx: &GlobalContext,
 ) -> CargoResult<()> {
     if !manifest.unstable_features().is_enabled(feature_gate) {
-        let dash_name = lint_name.replace("_", "-");
         let dash_feature_name = feature_gate.name().replace("_", "-");
-        let title = format!("use of unstable lint `{}`", dash_name);
+        let title = format!("use of unstable lint `{}`", lint_name);
         let label = format!(
             "this is behind `{}`, which is not enabled",
             dash_feature_name
         );
-        let second_title = format!("`cargo::{}` was inherited", dash_name);
+        let second_title = format!("`cargo::{}` was inherited", lint_name);
         let help = format!(
             "consider adding `cargo-features = [\"{}\"]` to the top of the manifest",
             dash_feature_name
         );
         let message = match reason {
             LintLevelReason::Package => {
-                let span = get_span(
-                    manifest.document(),
-                    &["lints", "cargo", dash_name.as_str()],
-                    false,
-                )
-                .or(get_span(
-                    manifest.document(),
-                    &["lints", "cargo", lint_name],
-                    false,
-                ))
-                .unwrap();
+                let span =
+                    get_span(manifest.document(), &["lints", "cargo", lint_name], false).unwrap();
 
                 Level::Error
                     .title(&title)
@@ -155,15 +145,10 @@ fn verify_feature_enabled(
             }
             LintLevelReason::Workspace => {
                 let lint_span = get_span(
-                    ws_document,
-                    &["workspace", "lints", "cargo", dash_name.as_str()],
-                    false,
-                )
-                .or(get_span(
                     ws_document,
                     &["workspace", "lints", "cargo", lint_name],
                     false,
-                ))
+                )
                 .unwrap();
                 let inherit_span_key =
                     get_span(manifest.document(), &["lints", "workspace"], false).unwrap();

tests/testsuite/lints/implicit_features/edition_2021_warn/mod.rs

@@ -27,7 +27,7 @@ baz = { version = "0.1.0", optional = true }
 target-dep = { version = "0.1.0", optional = true }
 
 [lints.cargo]
-implicit-features = "warn"
+implicit_features = "warn"
 "#,
         )
         .file("src/lib.rs", "")

tests/testsuite/lints/implicit_features/edition_2024/mod.rs

@@ -25,7 +25,7 @@ baz = { version = "0.1.0", optional = true }
 baz = ["dep:baz"]
 
 [lints.cargo]
-unused-optional-dependency = "allow"
+unused_optional_dependency = "allow"
 "#,
         )
         .file("src/lib.rs", "")

tests/testsuite/lints/unused_optional_dependencies/edition_2021/mod.rs

@@ -19,7 +19,7 @@ edition = "2021"
 bar = { version = "0.1.0", optional = true }
 
 [lints.cargo]
-implicit-features = "allow"
+implicit_features = "allow"
 "#,
         )
         .file("src/lib.rs", "")

tests/testsuite/lints_table.rs

@@ -762,7 +762,6 @@ edition = "2015"
 authors = []
 
 [lints.cargo]
-im-a-teapot = "warn"
             "#,
         )
         .file("src/lib.rs", "")
@@ -799,7 +798,6 @@ authors = []
 im-a-teapot = true
 
 [lints.cargo]
-im-a-teapot = "warn"
             "#,
         )
         .file("src/lib.rs", "")
@@ -835,7 +833,7 @@ authors = []
 im-a-teapot = true
 
 [lints.cargo]
-im-a-teapot = "warn"
+im_a_teapot = "warn"
             "#,
         )
         .file("src/lib.rs", "")
@@ -860,7 +858,7 @@ warning: `im_a_teapot` is specified
 }
 
 #[cargo_test]
-fn cargo_lints_underscore_supported() {
+fn cargo_lints_dashes_dont_get_rewritten() {
     let foo = project()
         .file(
             "Cargo.toml",
@@ -875,7 +873,7 @@ authors = []
 im-a-teapot = true
 
 [lints.cargo]
-im_a_teapot = "warn"
+im-a-teapot = "warn"
             "#,
         )
         .file("src/lib.rs", "")
@@ -885,13 +883,6 @@ im_a_teapot = "warn"
         .masquerade_as_nightly_cargo(&["cargo-lints", "test-dummy-unstable"])
         .with_stderr(
             "\
-warning: `im_a_teapot` is specified
- --> Cargo.toml:9:1
-  |
-9 | im-a-teapot = true
-  | ------------------
-  |
-  = note: `cargo::im_a_teapot` is set to `warn` in `[lints]`
 [CHECKING] foo v0.0.1 ([CWD])
 [FINISHED] [..]
 ",
@@ -915,8 +906,8 @@ authors = []
 im-a-teapot = true
 
 [lints.cargo]
-im-a-teapot = { level = "warn", priority = 10 }
-test-dummy-unstable = { level = "forbid", priority = -1 }
+im_a_teapot = { level = "warn", priority = 10 }
+test_dummy_unstable = { level = "forbid", priority = -1 }
             "#,
         )
         .file("src/lib.rs", "")
@@ -948,8 +939,8 @@ fn workspace_cargo_lints() {
 cargo-features = ["test-dummy-unstable"]
 
 [workspace.lints.cargo]
-im-a-teapot = { level = "warn", priority = 10 }
-test-dummy-unstable = { level = "forbid", priority = -1 }
+im_a_teapot = { level = "warn", priority = 10 }
+test_dummy_unstable = { level = "forbid", priority = -1 }
 
 [package]
 name = "foo"
@@ -992,7 +983,7 @@ fn dont_always_inherit_workspace_lints() {
 members = ["foo"]
 
 [workspace.lints.cargo]
-im-a-teapot = "warn"
+im_a_teapot = "warn"
 "#,
         )
         .file(
@@ -1038,7 +1029,7 @@ edition = "2021"
 baz = { version = "0.1.0", optional = true }
 
 [lints.cargo]
-implicit-features = "warn"
+implicit_features = "warn"
 "#,
         )
         .file("src/lib.rs", "")
@@ -1056,7 +1047,7 @@ edition = "2021"
 bar = "0.1.0"
 
 [lints.cargo]
-implicit-features = "warn"
+implicit_features = "warn"
 "#,
         )
         .file("src/lib.rs", "")
@@ -1091,7 +1082,7 @@ edition = "2015"
 authors = []
 
 [lints.cargo]
-im-a-teapot = "warn"
+im_a_teapot = "warn"
             "#,
         )
         .file("src/lib.rs", "")
@@ -1102,10 +1093,10 @@ im-a-teapot = "warn"
         .with_status(101)
         .with_stderr(
             "\
-error: use of unstable lint `im-a-teapot`
+error: use of unstable lint `im_a_teapot`
  --> Cargo.toml:9:1
   |
-9 | im-a-teapot = \"warn\"
+9 | im_a_teapot = \"warn\"
   | ^^^^^^^^^^^ this is behind `test-dummy-unstable`, which is not enabled
   |
   = help: consider adding `cargo-features = [\"test-dummy-unstable\"]` to the top of the manifest
@@ -1125,8 +1116,8 @@ fn check_feature_gated_workspace() {
 members = ["foo"]
 
 [workspace.lints.cargo]
-im-a-teapot = { level = "warn", priority = 10 }
-test-dummy-unstable = { level = "forbid", priority = -1 }
+im_a_teapot = { level = "warn", priority = 10 }
+test_dummy_unstable = { level = "forbid", priority = -1 }
             "#,
         )
         .file(
@@ -1150,26 +1141,26 @@ workspace = true
         .with_status(101)
         .with_stderr(
             "\
-error: use of unstable lint `im-a-teapot`
+error: use of unstable lint `im_a_teapot`
  --> Cargo.toml:6:1
   |
-6 | im-a-teapot = { level = \"warn\", priority = 10 }
+6 | im_a_teapot = { level = \"warn\", priority = 10 }
   | ^^^^^^^^^^^ this is behind `test-dummy-unstable`, which is not enabled
   |
-note: `cargo::im-a-teapot` was inherited
+note: `cargo::im_a_teapot` was inherited
  --> foo/Cargo.toml:9:1
   |
 9 | workspace = true
   | ----------------
   |
   = help: consider adding `cargo-features = [\"test-dummy-unstable\"]` to the top of the manifest
-error: use of unstable lint `test-dummy-unstable`
+error: use of unstable lint `test_dummy_unstable`
  --> Cargo.toml:7:1
   |
-7 | test-dummy-unstable = { level = \"forbid\", priority = -1 }
+7 | test_dummy_unstable = { level = \"forbid\", priority = -1 }
   | ^^^^^^^^^^^^^^^^^^^ this is behind `test-dummy-unstable`, which is not enabled
   |
-note: `cargo::test-dummy-unstable` was inherited
+note: `cargo::test_dummy_unstable` was inherited
  --> foo/Cargo.toml:9:1
   |
 9 | workspace = true