refactor/polish ~ fix cargo clippy complaints (collapse else-if)

src/mv/mv.rs

@@ -202,13 +202,11 @@ fn determine_backup_suffix(backup_mode: BackupMode, matches: &getopts::Matches)
                 );
             }
         }
-    } else {
+    } else if let (Ok(s), BackupMode::SimpleBackup) = (env::var("SIMPLE_BACKUP_SUFFIX"), backup_mode) {
-        if let (Ok(s), BackupMode::SimpleBackup) = (env::var("SIMPLE_BACKUP_SUFFIX"), backup_mode) {
         s
     } else {
         "~".to_owned()
     }
-    }
 }
 
 fn help(usage: &str) {

src/nproc/nproc.rs

@@ -115,13 +115,11 @@ fn num_cpus_all() -> usize {
         // In some situation, /proc and /sys are not mounted, and sysconf returns 1.
         // However, we want to guarantee that `nproc --all` >= `nproc`.
         num_cpus::get()
-    } else {
+    } else if nprocs > 0 {
-        if nprocs > 0 {
         nprocs as usize
     } else {
         1
     }
-    }
 }
 
 // Other platform(e.g., windows), num_cpus::get() directly.

src/pinky/pinky.rs

@@ -290,13 +290,11 @@ impl Pinky {
             if ut.is_user_process() {
                 if self.names.is_empty() {
                     self.print_entry(&ut)
-                } else {
+                } else if self.names.iter().any(|n| n.as_str() == ut.user()) {
-                    if self.names.iter().any(|n| n.as_str() == ut.user()) {
                         self.print_entry(&ut);
                 }
             }
         }
-        }
         Ok(())
     }
 

src/printf/tokenize/num_format/formatters/float_common.rs

@@ -27,13 +27,11 @@ fn has_enough_digits(
         } else {
             false //undecidable without converting
         }
-    } else {
+    } else if hex_input {
-        if hex_input {
             ((((string_position - 1) - starting_position) * 9) / 8 >= limit)
     } else {
             ((string_position - 1) - starting_position >= limit)
     }
-    }
 }
 
 impl FloatAnalysis {

src/ptx/ptx.rs

@@ -189,15 +189,13 @@ fn read_input(input_files: &[String], config: &Config) -> HashMap<String, (Vec<S
     let mut files = Vec::new();
     if input_files.is_empty() {
         files.push("-");
-    } else {
+    } else if config.gnu_ext {
-        if config.gnu_ext {
         for file in input_files {
             files.push(&file);
         }
     } else {
         files.push(&input_files[0]);
     }
-    }
     let mut lines_so_far: usize = 0;
     for filename in files {
         let reader: BufReader<Box<dyn Read>> = BufReader::new(if filename == "-" {

src/rm/rm.rs

@@ -225,8 +225,7 @@ fn handle_dir(path: &Path, options: &Options) -> bool {
         }
     } else if options.dir && (!is_root || !options.preserve_root) {
         had_err = remove_dir(path, options).bitor(had_err);
-    } else {
+    } else if options.recursive {
-        if options.recursive {
         show_error!("could not remove directory '{}'", path.display());
         had_err = true;
     } else {
@@ -236,7 +235,6 @@ fn handle_dir(path: &Path, options: &Options) -> bool {
         );
         had_err = true;
     }
-    }
 
     had_err
 }

src/sort/sort.rs

@@ -302,13 +302,11 @@ fn exec(files: Vec<String>, settings: &Settings) -> i32 {
         } else {
             print_sorted(file_merger, &settings.outfile)
         }
-    } else {
+    } else if settings.unique {
-        if settings.unique {
         print_sorted(lines.iter().dedup(), &settings.outfile)
     } else {
         print_sorted(lines.iter(), &settings.outfile)
     }
-    }
 
     0
 }

src/touch/touch.rs

@@ -182,12 +182,10 @@ pub fn uumain(args: Vec<String>) -> i32 {
             if let Err(e) = set_symlink_file_times(path, atime, mtime) {
                 show_warning!("cannot touch '{}': {}", path, e);
             }
-        } else {
+        } else if let Err(e) = filetime::set_file_times(path, atime, mtime) {
-            if let Err(e) = filetime::set_file_times(path, atime, mtime) {
                 show_warning!("cannot touch '{}': {}", path, e);
         }
     }
-    }
 
     0
 }