fix most clippy warnings

src/bin/main.rs

@@ -19,7 +19,7 @@ fn main() {
                     match e.kind() {
                         ErrorKind::BrokenPipe => exit(exits::SUCCESS),
                         _ => {
-                            writeln!(stderr(), "{}", e).unwrap();
+                            eprintln!("{}", e);
                             exit(exits::RUNTIME_ERROR);
                         },
                     };
@@ -39,7 +39,7 @@ fn main() {
         },
 
         Err(ref e) => {
-            writeln!(stdout(), "{}", e).unwrap();
+            println!("{}", e);
             exit(exits::SUCCESS);
         },
     };

src/exa.rs

@@ -83,7 +83,7 @@ impl Vars for LiveVars {
 /// listed before they’re actually listed, if the options demand it.
 fn git_options(options: &Options, args: &[&OsStr]) -> Option<GitCache> {
     if options.should_scan_for_git() {
-        Some(args.iter().map(|os| PathBuf::from(os)).collect())
+        Some(args.iter().map(PathBuf::from).collect())
     }
     else {
         None
@@ -166,7 +166,7 @@ impl<'args, 'w, W: Write + 'w> Exa<'args, 'w, W> {
                 first = false;
             }
             else {
-                write!(self.writer, "\n")?;
+                writeln!(self.writer)?;
             }
 
             if !is_only_dir {

src/fs/dir.rs

@@ -52,7 +52,7 @@ impl Dir {
             dir:       self,
             dotfiles:  dots.shows_dotfiles(),
             dots:      dots.dots(),
-            ignore:    ignore,
+            ignore,
         }
     }
 
@@ -103,7 +103,7 @@ impl<'dir, 'ig> Files<'dir, 'ig> {
         loop {
             if let Some(path) = self.inner.next() {
                 let filename = File::filename(path);
-                if !self.dotfiles && filename.starts_with(".") { continue }
+                if !self.dotfiles && filename.starts_with('.') { continue }
 
                 if let Some(i) = self.ignore {
                     if i.is_ignored(path) { continue }
@@ -180,8 +180,8 @@ impl Default for DotFilter {
 impl DotFilter {
 
     /// Whether this filter should show dotfiles in a listing.
-    fn shows_dotfiles(&self) -> bool {
-        match *self {
+    fn shows_dotfiles(self) -> bool {
+        match self {
             DotFilter::JustFiles       => false,
             DotFilter::Dotfiles        => true,
             DotFilter::DotfilesAndDots => true,
@@ -189,8 +189,8 @@ impl DotFilter {
     }
 
     /// Whether this filter should add dot directories to a listing.
-    fn dots(&self) -> Dots {
-        match *self {
+    fn dots(self) -> Dots {
+        match self {
             DotFilter::JustFiles       => Dots::FilesNext,
             DotFilter::Dotfiles        => Dots::FilesNext,
             DotFilter::DotfilesAndDots => Dots::DotNext,

src/fs/feature/git.rs

@@ -134,7 +134,7 @@ impl GitRepo {
 
         debug!("Querying Git repo {:?} for the first time", &self.workdir);
         let repo = replace(&mut *contents, Processing).inner_repo();
-        let statuses = repo_to_statuses(repo, &self.workdir);
+        let statuses = repo_to_statuses(&repo, &self.workdir);
         let result = statuses.status(index, prefix_lookup);
         let _processing = replace(&mut *contents, After { statuses });
         result
@@ -194,7 +194,7 @@ impl GitContents {
 /// mapping of files to their Git status.
 /// We will have already used the working directory at this point, so it gets
 /// passed in rather than deriving it from the `Repository` again.
-fn repo_to_statuses(repo: git2::Repository, workdir: &Path) -> Git {
+fn repo_to_statuses(repo: &git2::Repository, workdir: &Path) -> Git {
     let mut statuses = Vec::new();
 
     info!("Getting Git statuses for repo with workdir {:?}", workdir);

src/fs/feature/ignore.rs

@@ -72,7 +72,7 @@ fn file_lines_to_patterns<'a, I>(iter: I) -> IgnorePatterns
 where I: Iterator<Item=&'a str>
 {
     let iter = iter.filter(|el| !el.is_empty());
-    let iter = iter.filter(|el| !el.starts_with("#"));
+    let iter = iter.filter(|el| !el.starts_with('#'));
 
     // TODO: Figure out if this should trim whitespace or not
 

src/fs/feature/xattr.rs

@@ -203,7 +203,7 @@ mod lister {
 
     impl Lister {
         pub fn new(follow_symlinks: FollowSymlinks) -> Lister {
-            Lister { follow_symlinks: follow_symlinks }
+            Lister { follow_symlinks }
         }
 
         pub fn translate_attribute_name(&self, input: &[u8]) -> String {

src/fs/file.rs

@@ -95,13 +95,7 @@ impl<'dir> File<'dir> {
     /// against a pre-compiled list of extensions which are known to only exist
     /// within ASCII, so it’s alright.
     fn ext(path: &Path) -> Option<String> {
-        #[allow(unused)]
-        use std::ascii::AsciiExt;
-
-        let name = match path.file_name() {
-            Some(f) => f.to_string_lossy().to_string(),
-            None => return None,
-        };
+        let name = path.file_name().map(|f| f.to_string_lossy().to_string())?;
 
         name.rfind('.').map(|p| name[p+1..].to_ascii_lowercase())
     }
@@ -209,7 +203,7 @@ impl<'dir> File<'dir> {
             Ok(metadata) => {
                 let ext  = File::ext(&path);
                 let name = File::filename(&path);
-                FileTarget::Ok(File { parent_dir: None, path, ext, metadata, name })
+                FileTarget::Ok(Box::new(File { parent_dir: None, path, ext, metadata, name }))
             }
             Err(e) => {
                 error!("Error following link {:?}: {:#?}", &path, e);
@@ -229,7 +223,7 @@ impl<'dir> File<'dir> {
         let count = self.metadata.nlink();
 
         f::Links {
-            count: count,
+            count,
             multiple: self.is_file() && count > 1,
         }
     }
@@ -394,7 +388,7 @@ impl<'a> AsRef<File<'a>> for File<'a> {
 pub enum FileTarget<'dir> {
 
     /// The symlink pointed at a file that exists.
-    Ok(File<'dir>),
+    Ok(Box<File<'dir>>),
 
     /// The symlink pointed at a file that does not exist. Holds the path
     /// where the file would be, if it existed.

src/fs/filter.rs

@@ -227,10 +227,10 @@ impl SortField {
     /// into groups between letters and numbers, and then sorts those blocks
     /// together, so `file10` will sort after `file9`, instead of before it
     /// because of the `1`.
-    pub fn compare_files(&self, a: &File, b: &File) -> Ordering {
+    pub fn compare_files(self, a: &File, b: &File) -> Ordering {
         use self::SortCase::{ABCabc, AaBbCc};
 
-        match *self {
+        match self {
             SortField::Unsorted  => Ordering::Equal,
 
             SortField::Name(ABCabc)  => natord::compare(&a.name, &b.name),
@@ -270,7 +270,7 @@ impl SortField {
     }
 
     fn strip_dot(n: &str) -> &str {
-        if n.starts_with(".") {
+        if n.starts_with('.') {
             &n[1..]
         } else {
             n

src/options/help.rs

@@ -96,7 +96,7 @@ impl fmt::Display for HelpString {
     /// Format this help options into an actual string of help
     /// text to be displayed to the user.
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        write!(f, "Usage:\n  exa [options] [files...]\n")?;
+        writeln!(f, "Usage:\n  exa [options] [files...]")?;
 
         if !self.only_long {
             write!(f, "{}", OPTIONS)?;

src/options/misfire.rs

@@ -117,19 +117,13 @@ impl Misfire {
     /// went wrong.
     pub fn suggestion(&self) -> Option<&'static str> {
         // ‘ls -lt’ and ‘ls -ltr’ are common combinations
-        if let Misfire::BadArgument(ref time, ref r) = *self {
-            if *time == &flags::TIME && r == "r" {
-                return Some("To sort oldest files last, try \"--sort oldest\", or just \"-sold\"");
-            }
+        match *self {
+            Misfire::BadArgument(ref time, ref r) if *time == &flags::TIME && r == "r" =>
+                Some("To sort oldest files last, try \"--sort oldest\", or just \"-sold\""),
+            Misfire::InvalidOptions(ParseError::NeedsValue { ref flag, .. }) if *flag == Flag::Short(b't') =>
+                Some("To sort newest files last, try \"--sort newest\", or just \"-snew\""),
+            _ => None
         }
-
-        if let Misfire::InvalidOptions(ParseError::NeedsValue { ref flag, values: _ }) = *self {
-            if *flag == Flag::Short(b't') {
-                return Some("To sort newest files last, try \"--sort newest\", or just \"-snew\"");
-            }
-        }
-
-        None
     }
 }
 

src/options/parser.rs

@@ -452,7 +452,7 @@ fn split_on_equals(input: &OsStr) -> Option<(&OsStr, &OsStr)> {
         let (before, after) = input.as_bytes().split_at(index);
 
         // The after string contains the = that we need to remove.
-        if before.len() >= 1 && after.len() >= 2 {
+        if !before.is_empty() && after.len() >= 2 {
             return Some((OsStr::from_bytes(before),
                          OsStr::from_bytes(&after[1..])))
         }

src/options/view.rs

@@ -72,23 +72,20 @@ impl Mode {
                     Ok(Mode::Grid(grid))
                 }
             }
+            // If the terminal width couldn’t be matched for some reason, such
+            // as the program’s stdout being connected to a file, then
+            // fallback to the lines view.
+            else if matches.has(&flags::TREE)? {
+                let details = details::Options {
+                    table: None,
+                    header: false,
+                    xattr: xattr::ENABLED && matches.has(&flags::EXTENDED)?,
+                };
+
+                Ok(Mode::Details(details))
+            }
             else {
-                // If the terminal width couldn’t be matched for some reason, such
-                // as the program’s stdout being connected to a file, then
-                // fallback to the lines view.
-
-                if matches.has(&flags::TREE)? {
-                    let details = details::Options {
-                        table: None,
-                        header: false,
-                        xattr: xattr::ENABLED && matches.has(&flags::EXTENDED)?,
-                    };
-
-                    Ok(Mode::Details(details))
-                }
-                else {
-                    Ok(Mode::Lines)
-                }
+                Ok(Mode::Lines)
             }
         };
 
@@ -256,14 +253,14 @@ impl TimeFormat {
 
         let word = match matches.get(&flags::TIME_STYLE)? {
             Some(w) => w,
-            None    => return Ok(TimeFormat::DefaultFormat(DefaultFormat::new())),
+            None    => return Ok(TimeFormat::DefaultFormat(DefaultFormat::default())),
         };
 
         if word == "default" {
-            Ok(TimeFormat::DefaultFormat(DefaultFormat::new()))
+            Ok(TimeFormat::DefaultFormat(DefaultFormat::default()))
         }
         else if word == "iso" {
-            Ok(TimeFormat::ISOFormat(ISOFormat::new()))
+            Ok(TimeFormat::ISOFormat(ISOFormat::default()))
         }
         else if word == "long-iso" {
             Ok(TimeFormat::LongISO)

src/output/cell.rs

@@ -44,7 +44,7 @@ impl TextCell {
 
         TextCell {
             contents: vec![ style.paint(text) ].into(),
-            width:    width,
+            width,
         }
     }
 
@@ -56,7 +56,7 @@ impl TextCell {
 
         TextCell {
             contents: vec![ style.paint(text) ].into(),
-            width:    width,
+            width,
         }
     }
 

src/output/details.rs

@@ -184,7 +184,7 @@ impl<'a> Render<'a> {
 
     /// Adds files to the table, possibly recursively. This is easily
     /// parallelisable, and uses a pool of threads.
-    fn add_files_to_table<'dir, 'ig>(&self, pool: &mut Pool, table: &mut Option<Table<'a>>, rows: &mut Vec<Row>, src: &Vec<File<'dir>>, ignore: Option<&'ig IgnoreCache>, depth: TreeDepth) {
+    fn add_files_to_table<'dir, 'ig>(&self, pool: &mut Pool, table: &mut Option<Table<'a>>, rows: &mut Vec<Row>, src: &[File<'dir>], ignore: Option<&'ig IgnoreCache>, depth: TreeDepth) {
         use std::sync::{Arc, Mutex};
         use fs::feature::xattr;
 
@@ -294,7 +294,7 @@ impl<'a> Render<'a> {
 
                 if !files.is_empty() {
                     for xattr in egg.xattrs {
-                        rows.push(self.render_xattr(xattr, TreeParams::new(depth.deeper(), false)));
+                        rows.push(self.render_xattr(&xattr, TreeParams::new(depth.deeper(), false)));
                     }
 
                     for (error, path) in errors {
@@ -308,7 +308,7 @@ impl<'a> Render<'a> {
 
             let count = egg.xattrs.len();
             for (index, xattr) in egg.xattrs.into_iter().enumerate() {
-                rows.push(self.render_xattr(xattr, TreeParams::new(depth.deeper(), errors.is_empty() && index == count - 1)));
+                rows.push(self.render_xattr(&xattr, TreeParams::new(depth.deeper(), errors.is_empty() && index == count - 1)));
             }
 
             let count = errors.len();
@@ -340,7 +340,7 @@ impl<'a> Render<'a> {
         Row { cells: None, name, tree }
     }
 
-    fn render_xattr(&self, xattr: Attribute, tree: TreeParams) -> Row {
+    fn render_xattr(&self, xattr: &Attribute, tree: TreeParams) -> Row {
         let name = TextCell::paint(self.colours.perms.attribute, format!("{} (len {})", xattr.name, xattr.size));
         Row { cells: None, name, tree }
     }
@@ -353,7 +353,7 @@ impl<'a> Render<'a> {
         TableIter {
             tree_trunk: TreeTrunk::default(),
             total_width: table.widths().total(),
-            table: table,
+            table,
             inner: rows.into_iter(),
             tree_style: self.colours.punctuation,
         }

src/output/grid.rs

@@ -37,7 +37,7 @@ impl<'a> Render<'a> {
 
         grid.reserve(self.files.len());
 
-        for file in self.files.iter() {
+        for file in &self.files {
             let filename = self.style.for_file(file, self.colours).paint();
             let width = filename.width();
 
@@ -54,7 +54,7 @@ impl<'a> Render<'a> {
             // File names too long for a grid - drop down to just listing them!
             // This isn’t *quite* the same as the lines view, which also
             // displays full link paths.
-            for file in self.files.iter() {
+            for file in &self.files {
                 let name_cell = self.style.for_file(file, self.colours).paint();
                 writeln!(w, "{}", name_cell.strings())?;
             }

src/output/grid_details.rs

@@ -87,7 +87,7 @@ impl<'a> Render<'a> {
     /// *n* files into each column’s table, not all of them.
     pub fn details(&self) -> DetailsRender<'a> {
         DetailsRender {
-            dir: self.dir.clone(),
+            dir: self.dir,
             files: Vec::new(),
             colours: self.colours,
             style: self.style,
@@ -170,7 +170,7 @@ impl<'a> Render<'a> {
         None
     }
 
-    fn make_table<'t>(&'a self, options: &'a TableOptions, mut git: Option<&'a GitCache>, drender: &DetailsRender) -> (Table<'a>, Vec<DetailsRow>) {
+    fn make_table(&'a self, options: &'a TableOptions, mut git: Option<&'a GitCache>, drender: &DetailsRender) -> (Table<'a>, Vec<DetailsRow>) {
         match (git, self.dir) {
             (Some(g), Some(d))  => if !g.has_anything_for(&d.path) { git = None },
             (Some(g), None)     => if !self.files.iter().any(|f| g.has_anything_for(&f.path)) { git = None },
@@ -226,7 +226,7 @@ impl<'a> Render<'a> {
                                        else { grid::Direction::TopToBottom };
 
         let mut grid = grid::Grid::new(grid::GridOptions {
-            direction:  direction,
+            direction,
             filling:    grid::Filling::Spaces(4),
         });
 

src/output/render/size.rs

@@ -41,7 +41,7 @@ impl f::Size {
         let width = DisplayWidth::from(number.len() + symbol.len());
 
         TextCell {
-            width:    width,
+            width,
             contents: vec![
                 colours.size(size).paint(number),
                 colours.unit().paint(symbol),

src/output/table.rs

@@ -189,8 +189,8 @@ pub enum TimeType {
 impl TimeType {
 
     /// Returns the text to use for a column’s heading in the columns output.
-    pub fn header(&self) -> &'static str {
-        match *self {
+    pub fn header(self) -> &'static str {
+        match self {
             TimeType::Accessed  => "Date Accessed",
             TimeType::Modified  => "Date Modified",
             TimeType::Created   => "Date Created",
@@ -324,7 +324,7 @@ impl<'a, 'f> Table<'a> {
         f::PermissionsPlus {
             file_type: file.type_char(),
             permissions: file.permissions(),
-            xattrs: xattrs,
+            xattrs,
         }
     }
 
@@ -379,7 +379,7 @@ pub struct TableWidths(Vec<usize>);
 impl Deref for TableWidths {
     type Target = [usize];
 
-    fn deref<'a>(&'a self) -> &'a Self::Target {
+    fn deref(&self) -> &Self::Target {
         &self.0
     }
 }

src/output/time.rs

@@ -88,8 +88,8 @@ pub struct DefaultFormat {
     pub date_and_year: DateFormat<'static>,
 }
 
-impl DefaultFormat {
-    pub fn new() -> DefaultFormat {
+impl Default for DefaultFormat {
+    fn default() -> DefaultFormat {
         use unicode_width::UnicodeWidthStr;
 
         let locale = locale::Time::load_user_locale()
@@ -120,7 +120,9 @@ impl DefaultFormat {
 
         DefaultFormat { current_year, locale, date_and_time, date_and_year }
     }
+}
 
+impl DefaultFormat {
     fn is_recent(&self, date: LocalDateTime) -> bool {
         date.year() == self.current_year
     }
@@ -199,12 +201,14 @@ pub struct ISOFormat {
     pub current_year: i64,
 }
 
-impl ISOFormat {
-    pub fn new() -> Self {
+impl Default for ISOFormat {
+    fn default() -> ISOFormat {
         let current_year = LocalDateTime::now().year();
         ISOFormat { current_year }
     }
+}
 
+impl ISOFormat {
     fn is_recent(&self, date: LocalDateTime) -> bool {
         date.year() == self.current_year
     }

src/style/colours.rs

@@ -111,7 +111,7 @@ impl Colours {
     pub fn colourful(scale: bool) -> Colours {
         Colours {
             colourful: true,
-            scale: scale,
+            scale,
 
             filekinds: FileKinds {
                 normal:       Style::default(),

src/style/lsc.rs

@@ -8,8 +8,8 @@ pub struct LSColors<'var>(pub &'var str);
 
 impl<'var> LSColors<'var> {
     pub fn each_pair<C>(&mut self, mut callback: C) where C: FnMut(Pair<'var>) -> () {
-        for next in self.0.split(":") {
-            let bits = next.split("=")
+        for next in self.0.split(':') {
+            let bits = next.split('=')
                            .take(3)
                            .collect::<Vec<_>>();
 
@@ -28,25 +28,21 @@ pub struct Pair<'var> {
 use std::iter::Peekable;
 fn parse_into_high_colour<'a, I>(iter: &mut Peekable<I>) -> Option<Colour>
 where I: Iterator<Item=&'a str> {
-    match iter.peek() {
-        Some(&"5") => {
-            let _5 = iter.next();
-            if let Some(byte) = iter.next() {
-                if let Ok(num) = byte.parse() {
-                    return Some(Fixed(num));
-                }
+    if let Some(&"5") = iter.peek() {
+        let _ = iter.next();
+        if let Some(byte) = iter.next() {
+            if let Ok(num) = byte.parse() {
+                return Some(Fixed(num));
             }
         }
-        _ => {},
     }
-
     None
 }
 
 impl<'var> Pair<'var> {
     pub fn to_style(&self) -> Style {
         let mut style = Style::default();
-        let mut iter = self.value.split(";").peekable();
+        let mut iter = self.value.split(';').peekable();
 
         while let Some(num) = iter.next() {
             match num {