pre-commit run --all during CI (#2066)

* Fix the one

* pre-commit run -a during CI

* Install clang-format in elasticdl:dev and call make before lint

Author: wangkuiyi

.travis.yml

@@ -41,9 +41,11 @@ jobs:
           -f elasticdl/docker/Dockerfile
           --build-arg BASE_IMAGE="$BASE_IMAGE" .
         # Run pre-commit checks.
-        - docker run --rm -it -v $TRAVIS_BUILD_DIR:/work -w /work
+        - docker run --rm -it
+          -v $TRAVIS_BUILD_DIR:/work -w /work
           -v $HOME/.cache:/root/.cache
-          elasticdl:dev bash -c "scripts/pre-commit.sh"
+          elasticdl:dev
+          bash -c "make -f elasticdl/Makefile && pre-commit run -a"
         # Run a minikube cluster
         - bash scripts/travis/start_minikube.sh
         # Run unit tests not related to ODPS

docs/benchmark/data/README.md

@@ -10,4 +10,3 @@ Requirements:
 1. Make
 1. Gnuplot
 1. ImageMagick
-

elasticdl/docker/Dockerfile

@@ -6,7 +6,7 @@ ARG EXTRA_PYPI_INDEX=https://pypi.org/simple
 
 RUN apt-get -qq update && \
     apt-get -qq install -y unzip curl git software-properties-common g++ wget \
-                       shellcheck libeigen3-dev > /dev/null && \
+                       shellcheck libeigen3-dev clang-format > /dev/null && \
     python -m pip install --quiet --upgrade pip
 
 COPY elasticdl/requirements.txt /requirements.txt