tail: Cleanup imports

cherry pick

src/uu/tail/src/chunks.rs

@@ -7,7 +7,9 @@
 //! or at the end of piped stdin with [`LinesChunk`] or [`BytesChunk`].
 //!
 //! Use [`ReverseChunks::new`] to create a new iterator over chunks of bytes from the file.
+
 // spell-checker:ignore (ToDO) filehandle BUFSIZ
+
 use std::collections::VecDeque;
 use std::fs::File;
 use std::io::{BufRead, Read, Seek, SeekFrom, Write};

src/uu/tail/src/follow/files.rs

@@ -13,7 +13,6 @@ use std::collections::hash_map::Keys;
 use std::collections::HashMap;
 use std::fs::{File, Metadata};
 use std::io::{stdout, BufRead, BufReader, BufWriter};
-
 use std::path::{Path, PathBuf};
 use uucore::error::UResult;
 

src/uu/tail/src/follow/watch.rs

@@ -13,8 +13,7 @@ use notify::{RecommendedWatcher, RecursiveMode, Watcher, WatcherKind};
 use std::collections::VecDeque;
 use std::io::BufRead;
 use std::path::{Path, PathBuf};
-use std::sync::mpsc;
-use std::sync::mpsc::{channel, Receiver};
+use std::sync::mpsc::{self, channel, Receiver};
 use uucore::display::Quotable;
 use uucore::error::{set_exit_code, UResult, USimpleError};
 
@@ -91,6 +90,7 @@ pub struct WatcherService {
  /// platform specific event driven method. Since `use_polling` is subject to
  /// change during runtime it is moved out of [`Settings`].
  pub use_polling: bool,
+
  pub watcher_rx: Option<WatcherRx>,
  pub orphans: Vec<PathBuf>,
  pub files: FileHandling,

src/uu/tail/src/paths.rs

@@ -5,24 +5,16 @@
 
 // spell-checker:ignore tailable seekable stdlib (stdlib)
 
-#[cfg(unix)]
-use std::os::unix::fs::{FileTypeExt, MetadataExt};
-
+use crate::args::Settings;
+use crate::text;
 use std::collections::VecDeque;
 use std::fs::{File, Metadata};
 use std::io::{Seek, SeekFrom};
+#[cfg(unix)]
+use std::os::unix::fs::{FileTypeExt, MetadataExt};
 use std::path::{Path, PathBuf};
-
 use uucore::error::UResult;
 
-use crate::args::Settings;
-use crate::text;
-
-// * This file is part of the uutils coreutils package.
-// *
-// * For the full copyright and license information, please view the LICENSE
-// * file that was distributed with this source code.
-
 #[derive(Debug, Clone)]
 pub enum InputKind {
  File(PathBuf),

src/uu/tail/src/tail.rs

@@ -31,21 +31,19 @@ mod paths;
 mod platform;
 pub mod text;
 
+pub use args::uu_app;
+use args::{parse_args, FilterMode, Settings, Signum};
+use chunks::ReverseChunks;
+use follow::WatcherService;
+use paths::{FileExtTail, Input, InputKind, InputService, MetadataExtTail};
 use same_file::Handle;
 use std::cmp::Ordering;
 use std::fs::File;
 use std::io::{self, stdin, stdout, BufRead, BufReader, BufWriter, Read, Seek, SeekFrom, Write};
 use std::path::{Path, PathBuf};
-
 use uucore::display::Quotable;
 use uucore::error::{get_exit_code, set_exit_code, FromIo, UError, UResult, USimpleError};
 
-pub use args::uu_app;
-use args::{parse_args, FilterMode, Settings, Signum};
-use chunks::ReverseChunks;
-use follow::WatcherService;
-use paths::{FileExtTail, Input, InputKind, InputService, MetadataExtTail};
-
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
  let settings = parse_args(args)?;
@@ -96,7 +94,6 @@ fn uu_tail(settings: &Settings) -> UResult<()> {
  the input file is not a FIFO, pipe, or regular file, it is unspecified whether or
  not the -f option shall be ignored.
  */
-
  if !input_service.has_only_stdin() {
  follow::follow(watcher_service, settings)?;
  }
@@ -196,6 +193,7 @@ fn tail_file(
 }
 
 fn tail_stdin(
+ // TODO: remove settings
  settings: &Settings,
  input_service: &mut InputService,
  input: &Input,