Check code style on CI

riscv-rt/.travis.yml

@@ -21,6 +21,9 @@ matrix:
       rust:
       language: bash
       if: (branch = staging OR branch = trying OR branch = master) OR (type = pull_request AND branch = master)
+    - env: RUSTFMT=1
+      rust: stable
+      if: (branch = staging OR branch = trying OR branch = master) OR (type = pull_request AND branch = master)
 
 
 install:

riscv-rt/ci/install.sh

@@ -12,3 +12,7 @@ if [ -n "${CHECK_BLOBS:-}" ]; then
         curl -L https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.1.0-2018.12.0-x86_64-linux-ubuntu14.tar.gz | tar --strip-components=1 -C gcc -xz
     fi
 fi
+
+if [ -n "${RUSTFMT:-}" ]; then
+    rustup component add rustfmt
+fi

riscv-rt/ci/script.sh

@@ -18,3 +18,7 @@ if [ -n "${CHECK_BLOBS:-}" ]; then
     PATH="$PATH:$PWD/gcc/bin"
     ./check-blobs.sh
 fi
+
+if [ -n "${RUSTFMT:-}" ]; then
+    cargo fmt -- --check
+fi