Merge pull request #7744 from BenWiederhake/dev-clippy-0-1-87-nightly

Apply suggestions from clippy 0.1.87+nightly

Author: sylvestre

src/uu/comm/src/comm.rs

@@ -267,7 +267,7 @@ fn open_file(name: &str, line_ending: LineEnding) -> io::Result<LineReader> {
         Ok(LineReader::new(Input::Stdin(stdin()), line_ending))
     } else {
         if metadata(name)?.is_dir() {
-            return Err(io::Error::new(io::ErrorKind::Other, "Is a directory"));
+            return Err(io::Error::other("Is a directory"));
         }
         let f = File::open(name)?;
         Ok(LineReader::new(

src/uu/cp/src/copydir.rs

@@ -82,7 +82,7 @@ fn get_local_to_root_parent(
 /// Given an iterator, return all its items except the last.
 fn skip_last<T>(mut iter: impl Iterator<Item = T>) -> impl Iterator<Item = T> {
     let last = iter.next();
-    iter.scan(last, |state, item| std::mem::replace(state, Some(item)))
+    iter.scan(last, |state, item| state.replace(item))
 }
 
 /// Paths that are invariant throughout the traversal when copying a directory.

src/uu/du/src/du.rs

@@ -580,20 +580,18 @@ fn read_files_from(file_name: &str) -> Result<Vec<PathBuf>, std::io::Error> {
         // First, check if the file_name is a directory
         let path = PathBuf::from(file_name);
         if path.is_dir() {
-            return Err(std::io::Error::new(
-                std::io::ErrorKind::Other,
-                format!("{file_name}: read error: Is a directory"),
-            ));
+            return Err(std::io::Error::other(format!(
+                "{file_name}: read error: Is a directory"
+            )));
         }
 
         // Attempt to open the file and handle the error if it does not exist
         match File::open(file_name) {
             Ok(file) => Box::new(BufReader::new(file)),
             Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
-                return Err(std::io::Error::new(
-                    std::io::ErrorKind::Other,
-                    format!("cannot open '{file_name}' for reading: No such file or directory"),
-                ));
+                return Err(std::io::Error::other(format!(
+                    "cannot open '{file_name}' for reading: No such file or directory"
+                )));
             }
             Err(e) => return Err(e),
         }
@@ -637,13 +635,10 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
     let files = if let Some(file_from) = matches.get_one::<String>(options::FILES0_FROM) {
         if file_from == "-" && matches.get_one::<String>(options::FILE).is_some() {
-            return Err(std::io::Error::new(
-                std::io::ErrorKind::Other,
-                format!(
-                    "extra operand {}\nfile operands cannot be combined with --files0-from",
-                    matches.get_one::<String>(options::FILE).unwrap().quote()
-                ),
-            )
+            return Err(std::io::Error::other(format!(
+                "extra operand {}\nfile operands cannot be combined with --files0-from",
+                matches.get_one::<String>(options::FILE).unwrap().quote()
+            ))
             .into());
         }
 

src/uu/echo/src/echo.rs

@@ -168,21 +168,17 @@ fn execute(
 }
 
 fn bytes_from_os_string(input: &OsStr) -> Option<&[u8]> {
-    let option = {
-        #[cfg(target_family = "unix")]
-        {
-            use std::os::unix::ffi::OsStrExt;
+    #[cfg(target_family = "unix")]
+    {
+        use std::os::unix::ffi::OsStrExt;
 
-            Some(input.as_bytes())
-        }
-
-        #[cfg(not(target_family = "unix"))]
-        {
-            // TODO
-            // Verify that this works correctly on these platforms
-            input.to_str().map(|st| st.as_bytes())
-        }
-    };
+        Some(input.as_bytes())
+    }
 
-    option
+    #[cfg(not(target_family = "unix"))]
+    {
+        // TODO
+        // Verify that this works correctly on these platforms
+        input.to_str().map(|st| st.as_bytes())
+    }
 }

src/uu/env/src/native_int_str.rs

@@ -283,8 +283,7 @@ impl<'a> NativeStr<'a> {
         match &self.native {
             Cow::Borrowed(b) => {
                 let slice = f_borrow(b);
-                let os_str = slice.map(|x| from_native_int_representation(Cow::Borrowed(x)));
-                os_str
+                slice.map(|x| from_native_int_representation(Cow::Borrowed(x)))
             }
             Cow::Owned(o) => {
                 let slice = f_owned(o);

src/uu/fmt/src/linebreak.rs

@@ -164,9 +164,7 @@ fn break_knuth_plass<'a, T: Clone + Iterator<Item = &'a WordInfo<'a>>>(
 
                 // We find identical breakpoints here by comparing addresses of the references.
                 // This is OK because the backing vector is not mutating once we are linebreaking.
-                let winfo_ptr = winfo as *const _;
-                let next_break_ptr = next_break as *const _;
-                if winfo_ptr == next_break_ptr {
+                if std::ptr::eq(winfo, next_break) {
                     // OK, we found the matching word
                     if break_before {
                         write_newline(args.indent_str, args.ostream)?;

src/uu/mv/src/mv.rs

@@ -370,7 +370,7 @@ fn handle_two_paths(source: &Path, target: &Path, opts: &Options) -> UResult<()>
             OverwriteMode::NoClobber => return Ok(()),
             OverwriteMode::Interactive => {
                 if !prompt_yes!("overwrite {}? ", target.quote()) {
-                    return Err(io::Error::new(io::ErrorKind::Other, "").into());
+                    return Err(io::Error::other("").into());
                 }
             }
             OverwriteMode::Force => {}
@@ -609,7 +609,7 @@ fn rename(
 
         if opts.update == UpdateMode::ReplaceNoneFail {
             let err_msg = format!("not replacing {}", to.quote());
-            return Err(io::Error::new(io::ErrorKind::Other, err_msg));
+            return Err(io::Error::other(err_msg));
         }
 
         match opts.overwrite {
@@ -621,7 +621,7 @@ fn rename(
             }
             OverwriteMode::Interactive => {
                 if !prompt_yes!("overwrite {}?", to.quote()) {
-                    return Err(io::Error::new(io::ErrorKind::Other, ""));
+                    return Err(io::Error::other(""));
                 }
             }
             OverwriteMode::Force => {}
@@ -640,7 +640,7 @@ fn rename(
             if is_empty_dir(to) {
                 fs::remove_dir(to)?;
             } else {
-                return Err(io::Error::new(io::ErrorKind::Other, "Directory not empty"));
+                return Err(io::Error::other("Directory not empty"));
             }
         }
     }
@@ -756,7 +756,7 @@ fn rename_with_fallback(
                         io::ErrorKind::PermissionDenied,
                         "Permission denied",
                     )),
-                    _ => Err(io::Error::new(io::ErrorKind::Other, format!("{err:?}"))),
+                    _ => Err(io::Error::other(format!("{err:?}"))),
                 };
             }
         } else {
@@ -811,8 +811,7 @@ fn rename_symlink_fallback(from: &Path, to: &Path) -> io::Result<()> {
     }
     #[cfg(not(any(windows, unix)))]
     {
-        return Err(io::Error::new(
-            io::ErrorKind::Other,
+        return Err(io::Error::other(
             "your operating system does not support symlinks",
         ));
     }

src/uu/split/src/platform/unix.rs

@@ -4,7 +4,7 @@
 // file that was distributed with this source code.
 use std::env;
 use std::io::Write;
-use std::io::{BufWriter, Error, ErrorKind, Result};
+use std::io::{BufWriter, Error, Result};
 use std::path::Path;
 use std::process::{Child, Command, Stdio};
 use uucore::error::USimpleError;
@@ -134,22 +134,14 @@ pub fn instantiate_current_writer(
                     .create(true)
                     .truncate(true)
                     .open(Path::new(&filename))
-                    .map_err(|_| {
-                        Error::new(
-                            ErrorKind::Other,
-                            format!("unable to open '{filename}'; aborting"),
-                        )
-                    })?
+                    .map_err(|_| Error::other(format!("unable to open '{filename}'; aborting")))?
             } else {
                 // re-open file that we previously created to append to it
                 std::fs::OpenOptions::new()
                     .append(true)
                     .open(Path::new(&filename))
                     .map_err(|_| {
-                        Error::new(
-                            ErrorKind::Other,
-                            format!("unable to re-open '{filename}'; aborting"),
-                        )
+                        Error::other(format!("unable to re-open '{filename}'; aborting"))
                     })?
             };
             Ok(BufWriter::new(Box::new(file) as Box<dyn Write>))

src/uu/split/src/platform/windows.rs

@@ -3,7 +3,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 use std::io::Write;
-use std::io::{BufWriter, Error, ErrorKind, Result};
+use std::io::{BufWriter, Error, Result};
 use std::path::Path;
 use uucore::fs;
 
@@ -23,23 +23,13 @@ pub fn instantiate_current_writer(
             .create(true)
             .truncate(true)
             .open(Path::new(&filename))
-            .map_err(|_| {
-                Error::new(
-                    ErrorKind::Other,
-                    format!("unable to open '{filename}'; aborting"),
-                )
-            })?
+            .map_err(|_| Error::other(format!("unable to open '{filename}'; aborting")))?
     } else {
         // re-open file that we previously created to append to it
         std::fs::OpenOptions::new()
             .append(true)
             .open(Path::new(&filename))
-            .map_err(|_| {
-                Error::new(
-                    ErrorKind::Other,
-                    format!("unable to re-open '{filename}'; aborting"),
-                )
-            })?
+            .map_err(|_| Error::other(format!("unable to re-open '{filename}'; aborting")))?
     };
     Ok(BufWriter::new(Box::new(file) as Box<dyn Write>))
 }

src/uu/split/src/split.rs

@@ -535,10 +535,9 @@ impl Settings {
         is_new: bool,
     ) -> io::Result<BufWriter<Box<dyn Write>>> {
         if platform::paths_refer_to_same_file(&self.input, filename) {
-            return Err(io::Error::new(
-                ErrorKind::Other,
-                format!("'{filename}' would overwrite input; aborting"),
-            ));
+            return Err(io::Error::other(format!(
+                "'{filename}' would overwrite input; aborting"
+            )));
         }
 
         platform::instantiate_current_writer(self.filter.as_deref(), filename, is_new)
@@ -638,10 +637,9 @@ where
     } else if input == "-" {
         // STDIN stream that did not fit all content into a buffer
         // Most likely continuous/infinite input stream
-        return Err(io::Error::new(
-            ErrorKind::Other,
-            format!("{input}: cannot determine input size"),
-        ));
+        return Err(io::Error::other(format!(
+            "{input}: cannot determine input size"
+        )));
     } else {
         // Could be that file size is larger than set read limit
         // Get the file size from filesystem metadata
@@ -664,10 +662,9 @@ where
                 // Give up and return an error
                 // TODO It might be possible to do more here
                 // to address all possible file types and edge cases
-                return Err(io::Error::new(
-                    ErrorKind::Other,
-                    format!("{input}: cannot determine file size"),
-                ));
+                return Err(io::Error::other(format!(
+                    "{input}: cannot determine file size"
+                )));
             }
         }
     }
@@ -750,9 +747,10 @@ impl Write for ByteChunkWriter<'_> {
                 self.num_bytes_remaining_in_current_chunk = self.chunk_size;
 
                 // Allocate the new file, since at this point we know there are bytes to be written to it.
-                let filename = self.filename_iterator.next().ok_or_else(|| {
-                    io::Error::new(ErrorKind::Other, "output file suffixes exhausted")
-                })?;
+                let filename = self
+                    .filename_iterator
+                    .next()
+                    .ok_or_else(|| io::Error::other("output file suffixes exhausted"))?;
                 if self.settings.verbose {
                     println!("creating file {}", filename.quote());
                 }
@@ -871,9 +869,10 @@ impl Write for LineChunkWriter<'_> {
             // corresponding writer.
             if self.num_lines_remaining_in_current_chunk == 0 {
                 self.num_chunks_written += 1;
-                let filename = self.filename_iterator.next().ok_or_else(|| {
-                    io::Error::new(ErrorKind::Other, "output file suffixes exhausted")
-                })?;
+                let filename = self
+                    .filename_iterator
+                    .next()
+                    .ok_or_else(|| io::Error::other("output file suffixes exhausted"))?;
                 if self.settings.verbose {
                     println!("creating file {}", filename.quote());
                 }
@@ -948,7 +947,7 @@ impl ManageOutFiles for OutFiles {
         // This object is responsible for creating the filename for each chunk
         let mut filename_iterator: FilenameIterator<'_> =
             FilenameIterator::new(&settings.prefix, &settings.suffix)
-                .map_err(|e| io::Error::new(ErrorKind::Other, format!("{e}")))?;
+                .map_err(|e| io::Error::other(format!("{e}")))?;
         let mut out_files: Self = Self::new();
         for _ in 0..num_files {
             let filename = filename_iterator