tidy: apply considerable clippy suggestions

Signed-off-by: onur-ozkan <work@onurozkan.dev>

Author: onur-ozkan

Diff for: src/tools/tidy/src/alphabetical.rs

@@ -88,7 +88,7 @@ fn check_section<'a>(
         let trimmed_line = line.trim_start_matches(' ');
 
         if trimmed_line.starts_with("//")
-            || (trimmed_line.starts_with("#") && !trimmed_line.starts_with("#!"))
+            || (trimmed_line.starts_with('#') && !trimmed_line.starts_with("#!"))
             || trimmed_line.starts_with(is_close_bracket)
         {
             continue;

Diff for: src/tools/tidy/src/bins.rs

@@ -61,7 +61,7 @@ mod os_impl {
                     fs::remove_file(&path).expect("Deleted temp file");
                     // If the file is executable, then we assume that this
                     // filesystem does not track executability, so skip this check.
-                    return if exec { Unsupported } else { Supported };
+                    if exec { Unsupported } else { Supported }
                 }
                 Err(e) => {
                     // If the directory is read-only or we otherwise don't have rights,
@@ -76,7 +76,7 @@ mod os_impl {
 
                     panic!("unable to create temporary file `{:?}`: {:?}", path, e);
                 }
-            };
+            }
         }
 
         for &source_dir in sources {
@@ -92,7 +92,7 @@ mod os_impl {
             }
         }
 
-        return true;
+        true
     }
 
     // FIXME: check when rust-installer test sh files will be removed,

Diff for: src/tools/tidy/src/deps.rs

@@ -692,11 +692,9 @@ fn check_permitted_dependencies(
     for dep in deps {
         let dep = pkg_from_id(metadata, dep);
         // If this path is in-tree, we don't require it to be explicitly permitted.
-        if dep.source.is_some() {
-            if !permitted_dependencies.contains(dep.name.as_str()) {
-                tidy_error!(bad, "Dependency for {descr} not explicitly permitted: {}", dep.id);
-                has_permitted_dep_error = true;
-            }
+        if dep.source.is_some() && !permitted_dependencies.contains(dep.name.as_str()) {
+            tidy_error!(bad, "Dependency for {descr} not explicitly permitted: {}", dep.id);
+            has_permitted_dep_error = true;
         }
     }
 

Diff for: src/tools/tidy/src/error_codes.rs

@@ -308,11 +308,9 @@ fn check_error_codes_tests(
         for line in file.lines() {
             let s = line.trim();
             // Assuming the line starts with `error[E`, we can substring the error code out.
-            if s.starts_with("error[E") {
-                if &s[6..11] == code {
-                    found_code = true;
-                    break;
-                }
+            if s.starts_with("error[E") && &s[6..11] == code {
+                found_code = true;
+                break;
             };
         }
 

Diff for: src/tools/tidy/src/ext_tool_checks.rs

@@ -78,9 +78,9 @@ fn check_impl(
     let mut py_path = None;
 
     let (cfg_args, file_args): (Vec<_>, Vec<_>) = pos_args
-        .into_iter()
+        .iter()
         .map(OsStr::new)
-        .partition(|arg| arg.to_str().is_some_and(|s| s.starts_with("-")));
+        .partition(|arg| arg.to_str().is_some_and(|s| s.starts_with('-')));
 
     if python_lint || python_fmt {
         let venv_path = outdir.join("venv");
@@ -275,10 +275,11 @@ fn create_venv_at_path(path: &Path) -> Result<(), Error> {
         return Ok(());
     }
     let err = if String::from_utf8_lossy(&out.stderr).contains("No module named virtualenv") {
-        Error::Generic(format!(
+        Error::Generic(
             "virtualenv not found: you may need to install it \
                                (`python3 -m pip install venv`)"
-        ))
+                .to_owned(),
+        )
     } else {
         Error::Generic(format!("failed to create venv at '{}' using {sys_py}", path.display()))
     };

Diff for: src/tools/tidy/src/style.rs

@@ -461,10 +461,13 @@ pub fn check(path: &Path, bad: &mut bool) {
                 }
             }
             // for now we just check libcore
-            if trimmed.contains("unsafe {") && !trimmed.starts_with("//") && !last_safety_comment {
-                if file.components().any(|c| c.as_os_str() == "core") && !is_test {
-                    suppressible_tidy_err!(err, skip_undocumented_unsafe, "undocumented unsafe");
-                }
+            if trimmed.contains("unsafe {")
+                && !trimmed.starts_with("//")
+                && !last_safety_comment
+                && file.components().any(|c| c.as_os_str() == "core")
+                && !is_test
+            {
+                suppressible_tidy_err!(err, skip_undocumented_unsafe, "undocumented unsafe");
             }
             if trimmed.contains("// SAFETY:") {
                 last_safety_comment = true;
@@ -485,10 +488,10 @@ pub fn check(path: &Path, bad: &mut bool) {
                     "copyright notices attributed to the Rust Project Developers are deprecated"
                 );
             }
-            if !file.components().any(|c| c.as_os_str() == "rustc_baked_icu_data") {
-                if is_unexplained_ignore(&extension, line) {
-                    err(UNEXPLAINED_IGNORE_DOCTEST_INFO);
-                }
+            if !file.components().any(|c| c.as_os_str() == "rustc_baked_icu_data")
+                && is_unexplained_ignore(&extension, line)
+            {
+                err(UNEXPLAINED_IGNORE_DOCTEST_INFO);
             }
 
             if filename.ends_with(".cpp") && line.contains("llvm_unreachable") {
@@ -523,26 +526,24 @@ pub fn check(path: &Path, bad: &mut bool) {
                         backtick_count += comment_text.chars().filter(|ch| *ch == '`').count();
                     }
                     comment_block = Some((start_line, backtick_count));
-                } else {
-                    if let Some((start_line, backtick_count)) = comment_block.take() {
-                        if backtick_count % 2 == 1 {
-                            let mut err = |msg: &str| {
-                                tidy_error!(bad, "{}:{start_line}: {msg}", file.display());
-                            };
-                            let block_len = (i + 1) - start_line;
-                            if block_len == 1 {
-                                suppressible_tidy_err!(
-                                    err,
-                                    skip_odd_backticks,
-                                    "comment with odd number of backticks"
-                                );
-                            } else {
-                                suppressible_tidy_err!(
-                                    err,
-                                    skip_odd_backticks,
-                                    "{block_len}-line comment block with odd number of backticks"
-                                );
-                            }
+                } else if let Some((start_line, backtick_count)) = comment_block.take() {
+                    if backtick_count % 2 == 1 {
+                        let mut err = |msg: &str| {
+                            tidy_error!(bad, "{}:{start_line}: {msg}", file.display());
+                        };
+                        let block_len = (i + 1) - start_line;
+                        if block_len == 1 {
+                            suppressible_tidy_err!(
+                                err,
+                                skip_odd_backticks,
+                                "comment with odd number of backticks"
+                            );
+                        } else {
+                            suppressible_tidy_err!(
+                                err,
+                                skip_odd_backticks,
+                                "{block_len}-line comment block with odd number of backticks"
+                            );
                         }
                     }
                 }

Diff for: src/tools/tidy/src/walk.rs

@@ -78,13 +78,11 @@ pub(crate) fn walk_no_read(
     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()) {
-                continue;
-            }
-            f(&entry);
+    for entry in walker.build().flatten() {
+        if entry.file_type().map_or(true, |kind| kind.is_dir() || kind.is_symlink()) {
+            continue;
         }
+        f(&entry);
     }
 }
 
@@ -96,11 +94,9 @@ pub(crate) fn walk_dir(
 ) {
     let mut walker = ignore::WalkBuilder::new(path);
     let walker = walker.filter_entry(move |e| !skip(e.path()));
-    for entry in walker.build() {
-        if let Ok(entry) = entry {
-            if entry.path().is_dir() {
-                f(&entry);
-            }
+    for entry in walker.build().flatten() {
+        if entry.path().is_dir() {
+            f(&entry);
         }
     }
 }

Diff for: src/tools/tidy/src/x_version.rs

@@ -52,7 +52,7 @@ pub fn check(root: &Path, cargo: &Path, bad: &mut bool) {
             );
         }
     } else {
-        return tidy_error!(bad, "failed to check version of `x`: {}", cargo_list.status);
+        tidy_error!(bad, "failed to check version of `x`: {}", cargo_list.status)
     }
 }