Fix clippy warnings

Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Michael Zhang <mail@mzhang.io>"]
 description = "cli tool for interacting with the freedesktop trashcan"
 repository = "https://git.sr.ht/~iptq/garbage"
 license = "GPL-3.0"
-edition = "2018"
+edition = "2021"
 
 [[bin]]
 name = "garbage"

src/dir.rs

@@ -36,7 +36,7 @@ impl TrashDir {
     /// If the option is None, then the home trash will be selected instead.
     pub fn from_opt(opt: Option<impl AsRef<Path>>) -> Self {
         opt.map(|path| TrashDir::from(path.as_ref().to_path_buf()))
-            .unwrap_or_else(|| TrashDir::get_home_trash())
+            .unwrap_or_else(TrashDir::get_home_trash)
     }
 
     /// Actually create the directory on disk corresponding to this trash

src/errors.rs

@@ -71,7 +71,7 @@ pub struct MultipleErrors(Vec<Error>);
 
 impl fmt::Display for MultipleErrors {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        writeln!(f, "")?;
+        writeln!(f)?;
         for err in self.0.iter() {
             writeln!(f, "- {}", err)?;
         }

src/info.rs

@@ -14,11 +14,7 @@ const DATE_FORMAT: &str = "%Y-%m-%dT%H:%M:%S";
 
 fn parse_key_value(line: &str) -> Option<(&str, &str)> {
     let mut parts = line.split('=').peekable();
-    let key = if let Some(key) = parts.next() {
-        key
-    } else {
-        return None;
-    };
+    let key = parts.next()?;
 
     let value = &line[key.len() + 1..];
     Some((key, value))

src/main.rs

@@ -5,11 +5,11 @@ extern crate log;
 
 use std::process::exit;
 
+use clap::{crate_version, Parser};
 use garbage::{
     ops::{self, EmptyOptions, ListOptions, PutOptions, RestoreOptions},
     Result,
 };
-use clap::{Parser, crate_version};
 
 #[derive(Parser)]
 #[clap(about, version = concat!(crate_version!(), "-", env!("GIT_HASH")), author)]

src/ops/empty.rs

@@ -50,7 +50,7 @@ pub fn empty(options: EmptyOptions) -> Result<()> {
         // ignore files that were deleted after the cutoff (younger)
         .filter(|info| info.deletion_date <= cutoff)
         .filter(|info| options.all || info.path.starts_with(&current_dir))
-        .map(|info| -> Result<_> {
+        .try_for_each(|info| -> Result<_> {
             if options.dry {
                 println!("deleting {:?}", info.path);
             } else {
@@ -66,8 +66,7 @@ pub fn empty(options: EmptyOptions) -> Result<()> {
             }
 
             Ok(())
-        })
-        .collect::<Result<_>>()?;
+        })?;
 
     Ok(())
 }

src/ops/list.rs

@@ -29,13 +29,7 @@ pub fn list(options: ListOptions) -> Result<()> {
         .iter()?
         .collect::<Result<Vec<_>>>()?
         .into_iter()
-        .filter_map(|info| {
-            if !options.all && !info.path.starts_with(&current_dir) {
-                None
-            } else {
-                Some(info)
-            }
-        })
+        .filter(|info| options.all || info.path.starts_with(&current_dir))
         .collect::<Vec<_>>();
     files.sort_unstable_by_key(|info| info.deletion_date);
 

src/ops/put.rs

@@ -132,7 +132,7 @@ impl DeletionStrategy {
         let target = target.as_ref();
         let target_mount = MOUNTS
             .get_mount_point(target)
-            .ok_or_else(|| PutError::CouldntFindMountPoint)?;
+            .ok_or(PutError::CouldntFindMountPoint)?;
 
         // first, are we on the home mount?
         if target_mount == *HOME_MOUNT {
@@ -142,6 +142,7 @@ impl DeletionStrategy {
 
         // try to use the $topdir/.Trash directory
         // NOTE: really wish i could break from if statements...
+        #[allow(clippy::never_loop)]
         'topdir: while should_use_topdir_trash(&target_mount) {
             let topdir_trash_dir = target_mount
                 .join(".Trash")
@@ -313,5 +314,5 @@ fn should_use_topdir_trash_uid(path: impl AsRef<Path>) -> bool {
             Err(_) => return false,
         };
     }
-    return true;
+    true
 }

src/ops/restore.rs

@@ -53,7 +53,7 @@ pub fn restore(options: RestoreOptions) -> Result<()> {
         files
     };
 
-    if files.len() == 0 {
+    if files.is_empty() {
         return Err(Error::NoFilesInThisDirectory(
             trash_dir.path().to_path_buf(),
         ));

src/utils.rs

@@ -60,7 +60,7 @@ pub fn recursive_copy(
         let relative_path = path.strip_prefix(src)?;
 
         // this must be the root
-        if let None = relative_path.file_name() {
+        if relative_path.file_name().is_none() {
             fs::create_dir(dst)?;
             continue;
         }
@@ -101,7 +101,7 @@ pub fn percent_encode(path: impl AsRef<Path>) -> String {
         .join(&MAIN_SEPARATOR.to_string())
 }
 
-pub(crate) fn concat_os_str_iter<'a>(ss: &Vec<&'a OsStr>) -> OsString {
+pub(crate) fn concat_os_str_iter(ss: &[&OsStr]) -> OsString {
     let mut len = 0;
     for s in ss {
         len += s.len();