Run 'cargo fmt' and enforce via Travis

.travis.yml

@@ -28,6 +28,14 @@ matrix:
       rust: 1.24.0
       env: TARGET=x86_64-apple-darwin
 
+    # Code formatting check
+    - os: linux
+      rust: nightly
+      # skip the global install step
+      install:
+        - cargo install --debug --force rustfmt-nightly
+      script: cargo fmt -- --write-mode=diff
+
 addons:
   apt:
     packages:

src/main.rs

@@ -24,7 +24,7 @@ use std::env;
 use std::fs::{self, File};
 use std::io::{self, BufRead, BufReader, Stdout, StdoutLock, Write};
 use std::path::Path;
-use std::process::{self, Command, Child, Stdio};
+use std::process::{self, Child, Command, Stdio};
 
 use ansi_term::Colour::{Fixed, Green, Red, White, Yellow};
 use ansi_term::Style;
@@ -80,8 +80,7 @@ impl<'a> OutputType<'a> {
             .args(&["--quit-if-one-screen", "--RAW-CONTROL-CHARS", "--no-init"])
             .stdin(Stdio::piped())
             .spawn()
-            .chain_err(|| "Could not spawn pager")?
+            .chain_err(|| "Could not spawn pager")?))
-        ))
     }
 
     fn new_stdout(stdout: &'a Stdout) -> Self {
@@ -90,7 +89,10 @@ impl<'a> OutputType<'a> {
 
     fn stdout(&mut self) -> Result<&mut Write> {
         Ok(match *self {
-            OutputType::Pager(ref mut command) => command.stdin.as_mut().chain_err(|| "Could not open stdin for pager")?,
+            OutputType::Pager(ref mut command) => command
+                .stdin
+                .as_mut()
+                .chain_err(|| "Could not open stdin for pager")?,
             OutputType::Stdout(ref mut handle) => handle,
         })
     }
@@ -217,7 +219,6 @@ fn print_file<P: AsRef<Path>>(
         OptionsStyle::Plain => {}
     };
 
-
     for (idx, maybe_line) in reader.lines().enumerate() {
         let line_nr = idx + 1;
         let line = maybe_line.unwrap_or_else(|_| "<INVALID UTF-8>".into());
@@ -239,9 +240,10 @@ fn print_file<P: AsRef<Path>>(
             // Show only content for plain style
             OptionsStyle::Plain => writeln!(
                 handle,
-                "{}", as_terminal_escaped(&regions, options.true_color, options.colored_output))?,
+                "{}",
-            _ =>
+                as_terminal_escaped(&regions, options.true_color, options.colored_output)
-                writeln!(
+            )?,
+            _ => writeln!(
                 handle,
                 "{} {} {} {}",
                 colors.line_number.paint(format!("{:4}", line_nr)),
@@ -252,14 +254,15 @@ fn print_file<P: AsRef<Path>>(
                 },
                 colors.grid.paint("│"),
                 as_terminal_escaped(&regions, options.true_color, options.colored_output)
-                )?
+            )?,
         }
     }
 
     // Show bars for all but plain style
     match options.style {
-        OptionsStyle::LineNumbers | OptionsStyle::Full =>
+        OptionsStyle::LineNumbers | OptionsStyle::Full => {
-            print_horizontal_line(handle, &colors.grid, '┴', term_width)?,
+            print_horizontal_line(handle, &colors.grid, '┴', term_width)?
+        }
         OptionsStyle::Plain => {}
     };
 
@@ -494,7 +497,7 @@ fn run() -> Result<()> {
                 .takes_value(true)
                 .possible_values(&["auto", "never", "always"])
                 .default_value("auto")
-                .help("When to use colors")
+                .help("When to use colors"),
         )
         .subcommand(
             SubCommand::with_name("init-cache")

src/terminal.rs

@@ -1,7 +1,7 @@
 use std::fmt::Write;
 
-use ansi_term::Style;
 use ansi_term::Colour::{Fixed, RGB};
+use ansi_term::Style;
 use syntect::highlighting;
 
 /// Approximate a 24 bit color value by a 8 bit ANSI code
@@ -26,7 +26,11 @@ fn rgb2ansi(r: u8, g: u8, b: u8) -> u8 {
     }
 }
 
-pub fn as_terminal_escaped(v: &[(highlighting::Style, &str)], true_color: bool, colored: bool) -> String {
+pub fn as_terminal_escaped(
+    v: &[(highlighting::Style, &str)],
+    true_color: bool,
+    colored: bool,
+) -> String {
     let mut s: String = String::new();
     for &(ref style, text) in v.iter() {
         let style = if !colored {