Auto merge of #109440 - WaffleLapkin:make_tidy_slower, r=jyn514

Don't skip all directories when tidy-checking

This fixes a regression from https://github.com/rust-lang/rust/pull/108772 which basically made it that tidy style checks only `README.md` and `COMPILER_TESTS.md`.

23 files changed, 87 insertions, 67 deletions

diff --git a/compiler/rustc_attr/src/builtin.rs b/compiler/rustc_attr/src/builtin.rs
index a29e389953e..cb217be6654 100644
--- a/compiler/rustc_attr/src/builtin.rs
+++ b/compiler/rustc_attr/src/builtin.rs
@@ -227,7 +227,7 @@ impl UnstableReason {
 }
 
 /// Collects stability info from `stable`/`unstable`/`rustc_allowed_through_unstable_modules`
-/// attributes in `attrs`.  Returns `None` if no stability attributes are found.
+/// attributes in `attrs`. Returns `None` if no stability attributes are found.
 pub fn find_stability(
     sess: &Session,
     attrs: &[Attribute],
@@ -281,7 +281,7 @@ pub fn find_stability(
 }
 
 /// Collects stability info from `rustc_const_stable`/`rustc_const_unstable`/`rustc_promotable`
-/// attributes in `attrs`.  Returns `None` if no stability attributes are found.
+/// attributes in `attrs`. Returns `None` if no stability attributes are found.
 pub fn find_const_stability(
     sess: &Session,
     attrs: &[Attribute],
diff --git a/compiler/rustc_codegen_ssa/src/back/linker.rs b/compiler/rustc_codegen_ssa/src/back/linker.rs
index dd117681950..69bb00f804d 100644
--- a/compiler/rustc_codegen_ssa/src/back/linker.rs
+++ b/compiler/rustc_codegen_ssa/src/back/linker.rs
@@ -1621,7 +1621,7 @@ impl<'a> Linker for AixLinker<'a> {
         let path = tmpdir.join("list.exp");
         let res: io::Result<()> = try {
             let mut f = BufWriter::new(File::create(&path)?);
-            // TODO: use llvm-nm to generate export list.
+            // FIXME: use llvm-nm to generate export list.
             for symbol in symbols {
                 debug!("  _{}", symbol);
                 writeln!(f, "  {}", symbol)?;
diff --git a/compiler/rustc_error_codes/src/error_codes/E0080.md b/compiler/rustc_error_codes/src/error_codes/E0080.md
index 71d6c6fe2ef..c05324a5a2c 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0080.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0080.md
@@ -16,7 +16,8 @@ or causing an integer overflow are two ways to induce this error.
 Ensure that the expressions given can be evaluated as the desired integer type.
 
 See the [Discriminants] section of the Reference for more information about
-setting custom integer types on enums using the [`repr` attribute][repr-attribute].
+setting custom integer types on enums using the
+[`repr` attribute][repr-attribute].
 
 [discriminants]: https://doc.rust-lang.org/reference/items/enumerations.html#discriminants
 [repr-attribute]: https://doc.rust-lang.org/reference/type-layout.html#representations
diff --git a/compiler/rustc_error_codes/src/error_codes/E0794.md b/compiler/rustc_error_codes/src/error_codes/E0794.md
index 4377a292473..c8f73de95a2 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0794.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0794.md
@@ -59,6 +59,6 @@ In the definition of `bar`, the lifetime parameter `'a` is late-bound, while
 where `'a` is universally quantified and `'b` is substituted by a specific
 lifetime. It is not allowed to explicitly specify early-bound lifetime
 arguments when late-bound lifetime parameters are present (as for `bar_fn2`,
-see [issue #42868](https://github.com/rust-lang/rust/issues/42868)), although the
-types that are constrained by early-bound parameters can be specified (as for
-`bar_fn3`).
+see [issue #42868](https://github.com/rust-lang/rust/issues/42868)), although
+the types that are constrained by early-bound parameters can be specified (as
+for `bar_fn3`).
diff --git a/compiler/rustc_mir_build/src/build/expr/as_rvalue.rs b/compiler/rustc_mir_build/src/build/expr/as_rvalue.rs
index 3b775f590a4..7fff801b169 100644
--- a/compiler/rustc_mir_build/src/build/expr/as_rvalue.rs
+++ b/compiler/rustc_mir_build/src/build/expr/as_rvalue.rs
@@ -568,7 +568,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             BinOp::Shl | BinOp::Shr if self.check_overflow && ty.is_integral() => {
                 // For an unsigned RHS, the shift is in-range for `rhs < bits`.
                 // For a signed RHS, `IntToInt` cast to the equivalent unsigned
-                // type and do that same comparison.  Because the type is the
+                // type and do that same comparison. Because the type is the
                 // same size, there's no negative shift amount that ends up
                 // overlapping with valid ones, thus it catches negatives too.
                 let (lhs_size, _) = ty.int_size_and_signed(self.tcx);
diff --git a/src/doc/unstable-book/src/compiler-flags/sanitizer.md b/src/doc/unstable-book/src/compiler-flags/sanitizer.md
index f71aceff455..b55348b7889 100644
--- a/src/doc/unstable-book/src/compiler-flags/sanitizer.md
+++ b/src/doc/unstable-book/src/compiler-flags/sanitizer.md
@@ -213,7 +213,7 @@ See the [Clang ControlFlowIntegrity documentation][clang-cfi] for more details.
 
 ## Example
 
-```rust,ignore
+```rust,ignore (making doc tests pass cross-platform is hard)
 #![feature(naked_functions)]
 
 use std::arch::asm;
diff --git a/src/tools/replace-version-placeholder/src/main.rs b/src/tools/replace-version-placeholder/src/main.rs
index 864e68de55d..0aebfc4aad2 100644
--- a/src/tools/replace-version-placeholder/src/main.rs
+++ b/src/tools/replace-version-placeholder/src/main.rs
@@ -10,7 +10,7 @@ fn main() {
     let version_str = version_str.trim();
     walk::walk(
         &root_path,
-        |path| {
+        |path, _is_dir| {
             walk::filter_dirs(path)
                 // We exempt these as they require the placeholder
                 // for their operation
diff --git a/src/tools/tidy/src/alphabetical.rs b/src/tools/tidy/src/alphabetical.rs
index 9bfee1efc0b..fdc411c8925 100644
--- a/src/tools/tidy/src/alphabetical.rs
+++ b/src/tools/tidy/src/alphabetical.rs
@@ -95,7 +95,7 @@ fn check_section<'a>(
 }
 
 pub fn check(path: &Path, bad: &mut bool) {
-    walk(path, filter_dirs, &mut |entry, contents| {
+    walk(path, |path, _is_dir| filter_dirs(path), &mut |entry, contents| {
         let file = &entry.path().display();
 
         let mut lines = contents.lines().enumerate().peekable();
diff --git a/src/tools/tidy/src/bins.rs b/src/tools/tidy/src/bins.rs
index 070ce93f97c..7e5b4d810ba 100644
--- a/src/tools/tidy/src/bins.rs
+++ b/src/tools/tidy/src/bins.rs
@@ -103,36 +103,40 @@ mod os_impl {
 
         // FIXME: we don't need to look at all binaries, only files that have been modified in this branch
         // (e.g. using `git ls-files`).
-        walk_no_read(&[path], |path| filter_dirs(path) || path.ends_with("src/etc"), &mut |entry| {
-            let file = entry.path();
-            let extension = file.extension();
-            let scripts = ["py", "sh", "ps1"];
-            if scripts.into_iter().any(|e| extension == Some(OsStr::new(e))) {
-                return;
-            }
-
-            if t!(is_executable(&file), file) {
-                let rel_path = file.strip_prefix(path).unwrap();
-                let git_friendly_path = rel_path.to_str().unwrap().replace("\\", "/");
-
-                if ALLOWED.contains(&git_friendly_path.as_str()) {
+        walk_no_read(
+            &[path],
+            |path, _is_dir| filter_dirs(path) || path.ends_with("src/etc"),
+            &mut |entry| {
+                let file = entry.path();
+                let extension = file.extension();
+                let scripts = ["py", "sh", "ps1"];
+                if scripts.into_iter().any(|e| extension == Some(OsStr::new(e))) {
                     return;
                 }
 
-                let output = Command::new("git")
-                    .arg("ls-files")
-                    .arg(&git_friendly_path)
-                    .current_dir(path)
-                    .stderr(Stdio::null())
-                    .output()
-                    .unwrap_or_else(|e| {
-                        panic!("could not run git ls-files: {e}");
-                    });
-                let path_bytes = rel_path.as_os_str().as_bytes();
-                if output.status.success() && output.stdout.starts_with(path_bytes) {
-                    tidy_error!(bad, "binary checked into source: {}", file.display());
+                if t!(is_executable(&file), file) {
+                    let rel_path = file.strip_prefix(path).unwrap();
+                    let git_friendly_path = rel_path.to_str().unwrap().replace("\\", "/");
+
+                    if ALLOWED.contains(&git_friendly_path.as_str()) {
+                        return;
+                    }
+
+                    let output = Command::new("git")
+                        .arg("ls-files")
+                        .arg(&git_friendly_path)
+                        .current_dir(path)
+                        .stderr(Stdio::null())
+                        .output()
+                        .unwrap_or_else(|e| {
+                            panic!("could not run git ls-files: {e}");
+                        });
+                    let path_bytes = rel_path.as_os_str().as_bytes();
+                    if output.status.success() && output.stdout.starts_with(path_bytes) {
+                        tidy_error!(bad, "binary checked into source: {}", file.display());
+                    }
                 }
-            }
-        })
+            },
+        )
     }
 }
diff --git a/src/tools/tidy/src/debug_artifacts.rs b/src/tools/tidy/src/debug_artifacts.rs
index 84b13306805..582014d5059 100644
--- a/src/tools/tidy/src/debug_artifacts.rs
+++ b/src/tools/tidy/src/debug_artifacts.rs
@@ -6,11 +6,21 @@ use std::path::Path;
 const GRAPHVIZ_POSTFLOW_MSG: &str = "`borrowck_graphviz_postflow` attribute in test";
 
 pub fn check(test_dir: &Path, bad: &mut bool) {
-    walk(test_dir, |path| filter_dirs(path) || filter_not_rust(path), &mut |entry, contents| {
-        for (i, line) in contents.lines().enumerate() {
-            if line.contains("borrowck_graphviz_postflow") {
-                tidy_error!(bad, "{}:{}: {}", entry.path().display(), i + 1, GRAPHVIZ_POSTFLOW_MSG);
+    walk(
+        test_dir,
+        |path, _is_dir| filter_dirs(path) || filter_not_rust(path),
+        &mut |entry, contents| {
+            for (i, line) in contents.lines().enumerate() {
+                if line.contains("borrowck_graphviz_postflow") {
+                    tidy_error!(
+                        bad,
+                        "{}:{}: {}",
+                        entry.path().display(),
+                        i + 1,
+                        GRAPHVIZ_POSTFLOW_MSG
+                    );
+                }
             }
-        }
-    });
+        },
+    );
 }
diff --git a/src/tools/tidy/src/edition.rs b/src/tools/tidy/src/edition.rs
index 67d9c30a04f..f28f677e0ff 100644
--- a/src/tools/tidy/src/edition.rs
+++ b/src/tools/tidy/src/edition.rs
@@ -9,7 +9,7 @@ fn is_edition_2021(mut line: &str) -> bool {
 }
 
 pub fn check(path: &Path, bad: &mut bool) {
-    walk(path, |path| filter_dirs(path), &mut |entry, contents| {
+    walk(path, |path, _is_dir| filter_dirs(path), &mut |entry, contents| {
         let file = entry.path();
         let filename = file.file_name().unwrap();
         if filename != "Cargo.toml" {
diff --git a/src/tools/tidy/src/error_codes.rs b/src/tools/tidy/src/error_codes.rs
index a8375050614..417ace58c32 100644
--- a/src/tools/tidy/src/error_codes.rs
+++ b/src/tools/tidy/src/error_codes.rs
@@ -129,7 +129,7 @@ fn check_error_codes_docs(
 
     let mut no_longer_emitted_codes = Vec::new();
 
-    walk(&docs_path, |_| false, &mut |entry, contents| {
+    walk(&docs_path, |_, _| false, &mut |entry, contents| {
         let path = entry.path();
 
         // Error if the file isn't markdown.
@@ -321,7 +321,7 @@ fn check_error_codes_used(
 
     let mut found_codes = Vec::new();
 
-    walk_many(search_paths, filter_dirs, &mut |entry, contents| {
+    walk_many(search_paths, |path, _is_dir| filter_dirs(path), &mut |entry, contents| {
         let path = entry.path();
 
         // Return early if we aren't looking at a source file.
diff --git a/src/tools/tidy/src/features.rs b/src/tools/tidy/src/features.rs
index f18feda533c..2fd4c797b43 100644
--- a/src/tools/tidy/src/features.rs
+++ b/src/tools/tidy/src/features.rs
@@ -102,7 +102,7 @@ pub fn check(
             &tests_path.join("rustdoc-ui"),
             &tests_path.join("rustdoc"),
         ],
-        |path| {
+        |path, _is_dir| {
             filter_dirs(path)
                 || filter_not_rust(path)
                 || path.file_name() == Some(OsStr::new("features.rs"))
@@ -478,7 +478,7 @@ fn map_lib_features(
 ) {
     walk(
         base_src_path,
-        |path| filter_dirs(path) || path.ends_with("tests"),
+        |path, _is_dir| filter_dirs(path) || path.ends_with("tests"),
         &mut |entry, contents| {
             let file = entry.path();
             let filename = file.file_name().unwrap().to_string_lossy();
diff --git a/src/tools/tidy/src/mir_opt_tests.rs b/src/tools/tidy/src/mir_opt_tests.rs
index b316e9e9009..2f6918510e8 100644
--- a/src/tools/tidy/src/mir_opt_tests.rs
+++ b/src/tools/tidy/src/mir_opt_tests.rs
@@ -11,7 +11,7 @@ fn check_unused_files(path: &Path, bless: bool, bad: &mut bool) {
 
     walk_no_read(
         &[&path.join("mir-opt")],
-        |path| path.file_name() == Some("README.md".as_ref()),
+        |path, _is_dir| path.file_name() == Some("README.md".as_ref()),
         &mut |file| {
             let filepath = file.path();
             if filepath.extension() == Some("rs".as_ref()) {
diff --git a/src/tools/tidy/src/pal.rs b/src/tools/tidy/src/pal.rs
index 6b7b27fd526..d40c4ad0711 100644
--- a/src/tools/tidy/src/pal.rs
+++ b/src/tools/tidy/src/pal.rs
@@ -67,7 +67,7 @@ pub fn check(path: &Path, bad: &mut bool) {
     // Sanity check that the complex parsing here works.
     let mut saw_target_arch = false;
     let mut saw_cfg_bang = false;
-    walk(path, filter_dirs, &mut |entry, contents| {
+    walk(path, |path, _is_dir| filter_dirs(path), &mut |entry, contents| {
         let file = entry.path();
         let filestr = file.to_string_lossy().replace("\\", "/");
         if !filestr.ends_with(".rs") {
diff --git a/src/tools/tidy/src/rustdoc_gui_tests.rs b/src/tools/tidy/src/rustdoc_gui_tests.rs
index d7db5c02297..91776bc989e 100644
--- a/src/tools/tidy/src/rustdoc_gui_tests.rs
+++ b/src/tools/tidy/src/rustdoc_gui_tests.rs
@@ -5,10 +5,7 @@ use std::path::Path;
 pub fn check(path: &Path, bad: &mut bool) {
     crate::walk::walk(
         &path.join("rustdoc-gui"),
-        |p| {
-            // If there is no extension, it's very likely a folder and we want to go into it.
-            p.extension().map(|e| e != "goml").unwrap_or(false)
-        },
+        |p, is_dir| !is_dir && p.extension().map_or(true, |e| e != "goml"),
         &mut |entry, content| {
             for line in content.lines() {
                 if !line.starts_with("// ") {
diff --git a/src/tools/tidy/src/style.rs b/src/tools/tidy/src/style.rs
index a965c98f484..a2012db903a 100644
--- a/src/tools/tidy/src/style.rs
+++ b/src/tools/tidy/src/style.rs
@@ -227,7 +227,7 @@ fn is_unexplained_ignore(extension: &str, line: &str) -> bool {
 }
 
 pub fn check(path: &Path, bad: &mut bool) {
-    fn skip(path: &Path) -> bool {
+    fn skip(path: &Path, is_dir: bool) -> bool {
         if path.file_name().map_or(false, |name| name.to_string_lossy().starts_with(".#")) {
             // vim or emacs temporary file
             return true;
@@ -237,8 +237,15 @@ pub fn check(path: &Path, bad: &mut bool) {
             return true;
         }
 
+        // Don't check extensions for directories
+        if is_dir {
+            return false;
+        }
+
         let extensions = ["rs", "py", "js", "sh", "c", "cpp", "h", "md", "css", "ftl", "goml"];
-        if extensions.iter().all(|e| path.extension() != Some(OsStr::new(e))) {
+
+        // NB: don't skip paths without extensions (or else we'll skip all directories and will only check top level files)
+        if path.extension().map_or(true, |ext| !extensions.iter().any(|e| ext == OsStr::new(e))) {
             return true;
         }
 
diff --git a/src/tools/tidy/src/target_specific_tests.rs b/src/tools/tidy/src/target_specific_tests.rs
index e0fa6aceb85..de022be2894 100644
--- a/src/tools/tidy/src/target_specific_tests.rs
+++ b/src/tools/tidy/src/target_specific_tests.rs
@@ -37,7 +37,7 @@ struct RevisionInfo<'a> {
 }
 
 pub fn check(path: &Path, bad: &mut bool) {
-    crate::walk::walk(path, filter_not_rust, &mut |entry, content| {
+    crate::walk::walk(path, |path, _is_dir| filter_not_rust(path), &mut |entry, content| {
         let file = entry.path().display();
         let mut header_map = BTreeMap::new();
         iter_header(content, &mut |cfg, directive| {
diff --git a/src/tools/tidy/src/ui_tests.rs b/src/tools/tidy/src/ui_tests.rs
index 66f5c932be2..20b8a2c3b24 100644
--- a/src/tools/tidy/src/ui_tests.rs
+++ b/src/tools/tidy/src/ui_tests.rs
@@ -51,7 +51,7 @@ pub fn check(path: &Path, bad: &mut bool) {
     check_entries(&path, bad);
     let (ui, ui_fulldeps) = (path.join("ui"), path.join("ui-fulldeps"));
     let paths = [ui.as_path(), ui_fulldeps.as_path()];
-    crate::walk::walk_no_read(&paths, |_| false, &mut |entry| {
+    crate::walk::walk_no_read(&paths, |_, _| false, &mut |entry| {
         let file_path = entry.path();
         if let Some(ext) = file_path.extension() {
             if ext == "stderr" || ext == "stdout" {
diff --git a/src/tools/tidy/src/unit_tests.rs b/src/tools/tidy/src/unit_tests.rs
index 3da200a8a93..0a5dad88789 100644
--- a/src/tools/tidy/src/unit_tests.rs
+++ b/src/tools/tidy/src/unit_tests.rs
@@ -20,9 +20,9 @@ pub fn check(root_path: &Path, bad: &mut bool) {
             && !(path.starts_with(&core_tests) || path.starts_with(&core_benches))
     };
 
-    let skip = move |path: &Path| {
+    let skip = move |path: &Path, is_dir| {
         let file_name = path.file_name().unwrap_or_default();
-        if path.is_dir() {
+        if is_dir {
             filter_dirs(path)
                 || path.ends_with("src/doc")
                 || (file_name == "tests" || file_name == "benches") && !is_core(path)
diff --git a/src/tools/tidy/src/walk.rs b/src/tools/tidy/src/walk.rs
index 67a4df19fcc..3539943ebef 100644
--- a/src/tools/tidy/src/walk.rs
+++ b/src/tools/tidy/src/walk.rs
@@ -41,7 +41,7 @@ pub fn filter_not_rust(path: &Path) -> bool {
 
 pub fn walk(
     path: &Path,
-    skip: impl Clone + Send + Sync + 'static + Fn(&Path) -> bool,
+    skip: impl Send + Sync + 'static + Fn(&Path, bool) -> bool,
     f: &mut dyn FnMut(&DirEntry, &str),
 ) {
     walk_many(&[path], skip, f);
@@ -49,7 +49,7 @@ pub fn walk(
 
 pub fn walk_many(
     paths: &[&Path],
-    skip: impl Clone + Send + Sync + 'static + Fn(&Path) -> bool,
+    skip: impl Send + Sync + 'static + Fn(&Path, bool) -> bool,
     f: &mut dyn FnMut(&DirEntry, &str),
 ) {
     let mut contents = Vec::new();
@@ -67,14 +67,16 @@ pub fn walk_many(
 
 pub(crate) fn walk_no_read(
     paths: &[&Path],
-    skip: impl Send + Sync + 'static + Fn(&Path) -> bool,
+    skip: impl Send + Sync + 'static + Fn(&Path, bool) -> bool,
     f: &mut dyn FnMut(&DirEntry),
 ) {
     let mut walker = ignore::WalkBuilder::new(paths[0]);
     for path in &paths[1..] {
         walker.add(path);
     }
-    let walker = walker.filter_entry(move |e| !skip(e.path()));
+    let walker = walker.filter_entry(move |e| {
+        !skip(e.path(), e.file_type().map(|ft| ft.is_dir()).unwrap_or(false))
+    });
     for entry in walker.build() {
         if let Ok(entry) = entry {
             if entry.file_type().map_or(true, |kind| kind.is_dir() || kind.is_symlink()) {
diff --git a/tests/rustdoc/issue-108925.rs b/tests/rustdoc/issue-108925.rs
index 88aeb3c7f75..9c36d0d71c4 100644
--- a/tests/rustdoc/issue-108925.rs
+++ b/tests/rustdoc/issue-108925.rs
@@ -8,4 +8,3 @@ pub enum MyThing {
     #[doc(hidden)]
     NotShown,
 }
-
diff --git a/tests/ui/const-generics/generic_const_exprs/typeid-equality-by-subtyping.rs b/tests/ui/const-generics/generic_const_exprs/typeid-equality-by-subtyping.rs
index 64317b9d39a..85345d65c4a 100644
--- a/tests/ui/const-generics/generic_const_exprs/typeid-equality-by-subtyping.rs
+++ b/tests/ui/const-generics/generic_const_exprs/typeid-equality-by-subtyping.rs
@@ -17,7 +17,7 @@ const fn to_usize<T: 'static>() -> usize {
     match TypeId::of::<T>() {
         WHAT_A_TYPE => 0,
         _ => 1000,
-    } 
+    }
 }
 impl<T: 'static> AssocCt for T {
     const ASSOC: usize = to_usize::<T>();