refactor/polish ~ fix cargo clippy complaints (allow complexity)

src/cut/cut.rs

@@ -203,6 +203,7 @@ fn cut_bytes<R: Read>(reader: R, ranges: &[Range], opts: &Options) -> i32 {
     0
 }
 
+#[allow(clippy::cognitive_complexity)]
 fn cut_fields_delimiter<R: Read>(
     reader: R,
     ranges: &[Range],
@@ -288,6 +289,7 @@ fn cut_fields_delimiter<R: Read>(
     0
 }
 
+#[allow(clippy::cognitive_complexity)]
 fn cut_fields<R: Read>(reader: R, ranges: &[Range], opts: &FieldOptions) -> i32 {
     let newline_char = if opts.zero_terminated { b'\0' } else { b'\n' };
     if let Some(ref o_delim) = opts.out_delimeter {

src/du/du.rs

@@ -227,6 +227,7 @@ fn convert_size_other(size: u64, _multiplier: u64, block_size: u64) -> String {
     format!("{}", ((size as f64) / (block_size as f64)).ceil())
 }
 
+#[allow(clippy::cognitive_complexity)]
 pub fn uumain(args: Vec<String>) -> i32 {
     let syntax = format!(
         "[OPTION]... [FILE]...

src/fmt/fmt.rs

@@ -57,6 +57,7 @@ pub struct FmtOptions {
     tabwidth: usize,
 }
 
+#[allow(clippy::cognitive_complexity)]
 pub fn uumain(args: Vec<String>) -> i32 {
     let matches = new_coreopts!(SYNTAX, SUMMARY, LONG_HELP)
         .optflag("c", "crown-margin", "First and second line of paragraph may have different indentations, in which case the first line's indentation is preserved, and each subsequent line's indentation matches the second line.")

src/hashsum/hashsum.rs

@@ -48,6 +48,7 @@ fn is_custom_binary(program: &str) -> bool {
     }
 }
 
+#[allow(clippy::cognitive_complexity)]
 fn detect_algo(
     program: &str,
     matches: &getopts::Matches,
@@ -367,6 +368,8 @@ Compute and check message digests.",
     print!("{}", opts.usage(&msg));
 }
 
+#[allow(clippy::cognitive_complexity)]
+#[allow(clippy::too_many_arguments)]
 fn hashsum(
     algoname: &str,
     mut digest: Box<dyn Digest>,

src/ls/ls.rs

@@ -599,6 +599,7 @@ macro_rules! has {
 }
 
 #[cfg(unix)]
+#[allow(clippy::cognitive_complexity)]
 fn display_file_name(
     path: &Path,
     strip: Option<&Path>,

src/mknod/mknod.rs

@@ -45,6 +45,7 @@ fn _makenod(path: CString, mode: mode_t, dev: dev_t) -> i32 {
     unsafe { libc::mknod(path.as_ptr(), mode, dev) }
 }
 
+#[allow(clippy::cognitive_complexity)]
 pub fn uumain(args: Vec<String>) -> i32 {
     let mut opts = Options::new();
 

src/stat/stat.rs

@@ -209,6 +209,7 @@ pub struct Stater {
     default_dev_tokens: Vec<Token>,
 }
 
+#[allow(clippy::cognitive_complexity)]
 fn print_it(arg: &str, otype: OutputType, flag: u8, width: usize, precision: i32) {
     // If the precision is given as just '.', the precision is taken to be zero.
     // A negative precision is taken as if the precision were omitted.

src/tail/tail.rs

@@ -57,6 +57,7 @@ impl Default for Settings {
     }
 }
 
+#[allow(clippy::cognitive_complexity)]
 pub fn uumain(args: Vec<String>) -> i32 {
     let mut settings: Settings = Default::default();