fix: lint

build.rs

@@ -1,5 +1,3 @@
-use std::fs::remove_dir_all;
-
 fn main() {
     println!("cargo:rerun-if-changed=vendor");
 
@@ -21,7 +19,7 @@ fn main() {
             if !srcdir.exists() {
                 std::fs::create_dir(&srcdir).unwrap();
             }
-            remove_dir_all(&srcdir).unwrap();
+            std::fs::remove_dir_all(&srcdir).unwrap();
             fs_extra::dir::copy(
                 &d,
                 &srcdir,
@@ -129,7 +127,7 @@ mod vendored {
 
         check_dir(&mut hashed, src.as_ref(), &exception);
 
-        if !cache.is_some_and(|x| x.new_or_edited == hashed) {
+        if cache.is_none_or(|x| x.new_or_edited != hashed) {
             println!("Detected changes in vendored dependency. Updating cache.");
 
             let new_cache = Cache {

src/os/linux/mod.rs

@@ -11,8 +11,10 @@ pub mod overlay;
 #[cfg(feature = "overlayfs")]
 pub use overlay::OverlayFs;
 
+#[allow(unused_imports)]
 pub(crate) use option::set_option_helper;
 pub use option::{FsOption, LinuxFilesystem, MountOption};
+#[allow(unused_imports)]
 pub(crate) use recover_state::{restore_fsdata, FsData};
 
 /// Provide utility to recover filesystem state from the information provided by the system
@@ -41,10 +43,7 @@ mod recover_state {
     pub(crate) fn restore_fsdata<P: AsRef<Path>, O: FsOption>(
         path: P,
     ) -> Result<Option<FsData<O>>> {
-        let fd = unsafe {
-            let mtab = CStr::from_bytes_with_nul_unchecked(b"/etc/mtab\0");
-            setmntent(mtab.as_ptr(), "r".as_ptr() as *const i8)
-        };
+        let fd = unsafe { setmntent(c"/etc/mtab".as_ptr(), "r".as_ptr() as *const i8) };
         if fd.is_null() {
             return Err(std::io::Error::new(
                 std::io::ErrorKind::Other,
@@ -92,6 +91,7 @@ mod option {
         fn options(&self) -> &[MountOption<O>];
     }
 
+    #[allow(dead_code)]
     pub(crate) fn set_option_helper<T, O>(
         options: &mut Vec<MountOption<T>>,
         option: O,

src/os/linux/overlay.rs

@@ -12,7 +12,7 @@ use nix::{
     unistd::getuid,
 };
 use std::{
-    ffi::{CStr, CString},
+    ffi::CString,
     io::{Error, ErrorKind, Result},
     path::{Path, PathBuf},
 };
@@ -173,9 +173,9 @@ impl Filesystem for OverlayFs {
         let mut args = options.as_bytes().to_vec();
         args.push(b'\0');
         mount(
-            Some(unsafe { CStr::from_bytes_with_nul(b"overlay\0").unwrap_unchecked() }),
+            Some(c"overlay"),
             &*self.target,
-            Some(unsafe { CStr::from_bytes_with_nul(b"overlay\0").unwrap_unchecked() }),
+            Some(c"overlay"),
             flags,
             Some(unsafe { CString::from_vec_with_nul_unchecked(args).as_bytes() }),
         )