Enforce code style on CI with rustfmt

.travis.yml

@@ -39,16 +39,24 @@ matrix:
       rust: stable
       before_script:
         - rustup component add clippy-preview
+        - cargo clippy --version
+        - rustup component add rustfmt
+        - rustfmt --version
       script:
         - cargo clippy --all-targets --all-features -- -D warnings
+        - cargo fmt --all -- --check
         - cargo test --verbose
         - cargo build --release --target $TARGET --locked
       <<: *DEPLOY_TO_GITHUB
 
     - name: Linux-Beta
       env: TARGET=x86_64-unknown-linux-gnu
       rust: beta
+      before_script:
+        - rustup component add rustfmt
+        - rustfmt --version
       script:
+        - cargo fmt --all -- --check
         - cargo test --verbose
         - cargo build --verbose
 
@@ -57,8 +65,12 @@ matrix:
       rust: nightly
       before_script:
         - rustup component add clippy-preview
+        - cargo clippy --version
+        - rustup component add rustfmt
+        - rustfmt --version
       script:
         - cargo clippy --all-targets --all-features -- -D warnings
+        - cargo fmt --all -- --check
         - cargo test --verbose
         - cargo build --verbose
 
@@ -68,8 +80,12 @@ matrix:
       rust: stable
       before_script:
         - rustup component add clippy-preview
+        - cargo clippy --version
+        - rustup component add rustfmt
+        - rustfmt --version
       script:
         - cargo clippy --all-targets --all-features -- -D warnings
+        - cargo fmt --all -- --check
         - cargo test --verbose
         - cargo build --release --target $TARGET --locked
       <<: *DEPLOY_TO_GITHUB
@@ -78,7 +94,11 @@ matrix:
       os: windows
       env: TARGET=x86_64-pc-windows-msvc
       rust: beta
+      before_script:
+        - rustup component add rustfmt
+        - rustfmt --version
       script:
+        - cargo fmt --all -- --check
         - cargo test --verbose
         - cargo build --verbose
 
@@ -88,7 +108,11 @@ matrix:
       rust: nightly
       before_script:
         - rustup component add clippy-preview
+        - cargo clippy --version
+        - rustup component add rustfmt
+        - rustfmt --version
       script:
         - cargo clippy --all-targets --all-features -- -D warnings
+        - cargo fmt --all -- --check
         - cargo test --verbose
         - cargo build --verbose

src/main.rs

@@ -1,7 +1,7 @@
 extern crate clap;
 extern crate supernova;
 
-use clap::{App, Arg, crate_name, crate_version};
+use clap::{crate_name, crate_version, App, Arg};
 use std::process;
 use supernova::Config;
 
@@ -12,13 +12,15 @@ fn main() {
             Arg::with_name("USERNAME")
                 .help("The user whose stars to collect")
                 .required(true),
-        ).arg(
+        )
+        .arg(
             Arg::with_name("TOKEN")
                 .short("t")
                 .long("token")
                 .help("Sets the authentication token for requests to GitHub")
                 .takes_value(true),
-        ).get_matches()
+        )
+        .get_matches()
         .into();
 
     if let Err(e) = supernova::collect_stars(config) {