src/cachefile.rs

@@ -57,7 +57,10 @@ impl CacheFile {
         };
 
         if args.should_hash() {
-            fn check_hash(file: &impl FileTrait, bar: &ProgressBar) -> crate::Result<()> {
+            fn check_hash<'a>(
+                file: &'a impl FileTrait<'a>,
+                bar: &ProgressBar,
+            ) -> crate::Result<()> {
                 bar.set_message(format!("checking {:?}", file.get_name()));
                 file.check_hash(|bytes| bar.inc(bytes))
             }

src/error.rs

@@ -121,16 +121,15 @@ impl Error {
         }
     }
 
-    pub fn is_mismatch<E, A>(&self, want_expected: E, want_actual: A) -> bool
+    pub fn is_mismatch<E, A>(&self, has_expected: E, has_actual: A) -> bool
     where
-        E: AsRef<str>,
-        A: AsRef<str>,
+        String: PartialEq<E> + PartialEq<A>,
     {
         matches!(
             self,
             Self::Mismatch { expected, actual }
-                if expected == want_expected.as_ref()
-                && actual == want_actual.as_ref()
+                if *expected == has_expected
+                && *actual == has_actual
         )
     }
 

src/file/checked.rs

@@ -91,8 +91,8 @@ impl Checked {
     }
 }
 
-impl FileTrait for Checked {
-    fn get_name(&self) -> &str {
+impl<'t> FileTrait<'t> for Checked {
+    fn get_name(&'t self) -> &'t str {
         <Self as FileTrait>::extract_file_name(&self.path)
     }
 
@@ -104,7 +104,7 @@ impl FileTrait for Checked {
         super::check_hash(
             &self.path,
             self.size,
-            self.hash.as_deref(),
+            self.hash.as_ref().map(String::as_str),
             on_progress,
         )
     }

src/file/mod.rs

@@ -16,7 +16,7 @@ pub use uploading::Uploading;
 const HASH_CHUNK_SIZE: usize = 4 * 1024 * 1024;
 
 /// compute hash for a file given its path.
-/// Hash function: `BLAKE2b`, 512 bit
+/// Hash function: BLAKE2b, 512 bit
 ///
 /// # Params
 ///
@@ -96,13 +96,13 @@ fn check_hash(
     }
 }
 
-pub trait FileTrait {
+pub trait FileTrait<'t> {
     /// extract the filename part of a `Path` reference
     ///
     /// # Panics
     ///
     /// Expects `path::Path::file_name` and `ffi::OsStr::to_str` to succeed on the given path
-    fn extract_file_name(p: &Path) -> &str {
+    fn extract_file_name(p: &'t Path) -> &'t str {
         p.file_name()
             .and_then(OsStr::to_str)
             .expect("bad file name")
@@ -111,7 +111,7 @@ pub trait FileTrait {
     /// get a reference to the file's name
     ///
     /// Uses `file::FileTrait::extract_file_name`, which may **panic**!
-    fn get_name(&self) -> &str;
+    fn get_name(&'t self) -> &'t str;
 
     /// get the file's size
     fn get_size(&self) -> u64;

src/file/uploading.rs

@@ -94,8 +94,8 @@ impl Uploading {
     }
 }
 
-impl FileTrait for Uploading {
-    fn get_name(&self) -> &str {
+impl<'t> FileTrait<'t> for Uploading {
+    fn get_name(&'t self) -> &'t str {
         <Self as FileTrait>::extract_file_name(&self.path)
     }
 
@@ -107,7 +107,7 @@ impl FileTrait for Uploading {
         super::check_hash(
             &self.path,
             self.size,
-            self.hash.as_deref(),
+            self.hash.as_ref().map(String::as_str),
             on_progress,
         )
     }