clippy: fix nightly map_unwrap_or lint

src/uu/cp/src/cp.rs

@@ -2381,9 +2381,7 @@ fn copy_file(
     let dest_target_exists = dest.try_exists().unwrap_or(false);
     // Fail if dest is a dangling symlink or a symlink this program created previously
     if dest_is_symlink {
-        if FileInformation::from_path(dest, false)
-            .map(|info| symlinked_files.contains(&info))
-            .unwrap_or(false)
+        if FileInformation::from_path(dest, false).is_ok_and(|info| symlinked_files.contains(&info))
         {
             return Err(CpError::Error(
                 translate!("cp-error-will-not-copy-through-symlink", "source" => source.quote(), "dest" => dest.quote()),

src/uu/dd/src/dd.rs

@@ -29,6 +29,8 @@ use uucore::translate;
 use std::cmp;
 use std::env;
 use std::ffi::OsString;
+#[cfg(unix)]
+use std::fs::Metadata;
 use std::fs::{File, OpenOptions};
 use std::io::{self, Read, Seek, SeekFrom, Write};
 #[cfg(any(target_os = "linux", target_os = "android"))]
@@ -273,7 +275,7 @@ impl Source {
                     }
                 }
                 // Get file length before seeking to avoid race condition
-                let file_len = f.metadata().map(|m| m.len()).unwrap_or(u64::MAX);
+                let file_len = f.metadata().as_ref().map_or(u64::MAX, Metadata::len);
                 // Try seek first; fall back to read if not seekable
                 match n.try_into().ok().map(|n| f.seek(SeekFrom::Current(n))) {
                     Some(Ok(pos)) => {

src/uu/rm/src/rm.rs

@@ -451,21 +451,16 @@ fn count_files(paths: &[&OsStr], recursive: bool) -> u64 {
 
 /// A helper for `count_files` specialized for directories.
 fn count_files_in_directory(p: &Path) -> u64 {
-    let entries_count = fs::read_dir(p)
-        .map(|entries| {
-            entries
-                .filter_map(Result::ok)
-                .map(|entry| {
-                    let file_type = entry.file_type();
-                    match file_type {
-                        Ok(ft) if ft.is_dir() => count_files_in_directory(&entry.path()),
-                        Ok(_) => 1,
-                        Err(_) => 0,
-                    }
-                })
-                .sum()
-        })
-        .unwrap_or(0);
+    let entries_count = fs::read_dir(p).map_or(0, |entries| {
+        entries
+            .flatten()
+            .map(|entry| match entry.file_type() {
+                Ok(ft) if ft.is_dir() => count_files_in_directory(&entry.path()),
+                Ok(_) => 1,
+                Err(_) => 0,
+            })
+            .sum()
+    });
 
     1 + entries_count
 }

src/uu/sort/src/sort.rs

@@ -35,7 +35,7 @@ use std::ffi::{OsStr, OsString};
 use std::fs::{File, OpenOptions};
 use std::hash::{Hash, Hasher};
 use std::io::{BufRead, BufReader, BufWriter, Read, Write, stdin, stdout};
-use std::num::IntErrorKind;
+use std::num::{IntErrorKind, NonZero};
 use std::ops::Range;
 #[cfg(unix)]
 use std::os::unix::ffi::OsStrExt;
@@ -1979,9 +1979,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
             .get_one::<String>(options::PARALLEL)
             .map_or_else(|| "0".to_string(), String::from);
         let num_threads = match settings.threads.parse::<usize>() {
-            Ok(0) | Err(_) => std::thread::available_parallelism()
-                .map(|n| n.get())
-                .unwrap_or(1),
+            Ok(0) | Err(_) => std::thread::available_parallelism().map_or(1, NonZero::get),
             Ok(n) => n,
         };
         let _ = rayon::ThreadPoolBuilder::new()

src/uucore/src/lib/features/systemd_logind.rs

@@ -391,10 +391,10 @@ pub fn read_login_records() -> UResult<Vec<SystemdLoginRecord>> {
             }
         };
 
-        // Get start time using safe wrapper
-        let start_time = login::get_session_start_time(&session_id)
-            .map(|usec| UNIX_EPOCH + std::time::Duration::from_micros(usec))
-            .unwrap_or(UNIX_EPOCH); // fallback to epoch if unavailable
+        // Get start time using safe wrapper, fallback to epoch if unavailable
+        let start_time = login::get_session_start_time(&session_id).map_or(UNIX_EPOCH, |usec| {
+            UNIX_EPOCH + std::time::Duration::from_micros(usec)
+        });
 
         // Get TTY using safe wrapper
         let mut tty = login::get_session_tty(&session_id)