Integrate rustfmt into travis and Github Actions.

.github/workflows/build.yml

@@ -17,6 +17,7 @@ jobs:
         include:
           - toolchain: stable
             build-net-tokio: true
+            check-fmt: true
           - toolchain: beta
             build-net-tokio: true
           - toolchain: 1.39.0
@@ -32,6 +33,9 @@ jobs:
           toolchain: ${{ matrix.toolchain }}
           override: true
           profile: minimal
+      - name: Check formatting
+        if: matrix.check-fmt
+        run: rustup component add rustfmt && cargo fmt --all -- --check && cd fuzz && cargo fmt --all -- --check
       - name: Build on Rust ${{ matrix.toolchain }} with net-tokio
         if: matrix.build-net-tokio
         run: RUSTFLAGS="-C link-dead-code" cargo build --verbose --color always

.travis.yml

@@ -15,6 +15,8 @@ before_install:
   - sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc binutils-dev libiberty-dev
 
 script:
+     # Check formatting
+     - if [ "$(rustup show | grep stable)" != "" ]; then rustup component add rustfmt && cargo fmt --all -- --check && cd fuzz && cargo fmt --all -- --check && cd ../ ; fi
      # Support lightning-net-tokio only on Rust stable, beta, and 1.39.0
      - if [ "$(rustup show | grep default | grep '1.39.0')" != "" ]; then export BUILD_NET_TOKIO=1; fi
      - if [ "$(rustup show | grep default | grep '1\.')" == "" ]; then export BUILD_NET_TOKIO=1; fi