Simplify Travis CI configuration

.travis.yml

@@ -2,7 +2,6 @@ group: deprecated-2017Q2
 language: cpp
 cache:
   directories:
-    - $HOME/third_party
     - $HOME/.ccache
     - $HOME/.cache/pip
 sudo: required
@@ -18,7 +17,6 @@ addons:
     packages:
       - gcc-4.8
       - g++-4.8
-      - gfortran-4.8
       - git
       - build-essential
       - python

paddle/scripts/travis/build_and_test.sh

-#!/bin/bash
-source ./common.sh
-
-NPROC=1
-export PYTHONPATH=/opt/python/2.7.12/lib/python2.7/site-packages
-export PYTHONHOME=/opt/python/2.7.12
-export PATH=/opt/python/2.7.12/bin:${PATH}
-cmake .. -DCMAKE_Fortran_COMPILER=/usr/bin/gfortran-4.8 -DON_TRAVIS=ON -DWITH_COVERAGE=ON -DCOVERALLS_UPLOAD=ON ${EXTRA_CMAKE_OPTS}
-NRPOC=`nproc`
-make -j $NPROC
-make coveralls
-sudo make install

paddle/scripts/travis/docs.sh → paddle/scripts/travis/build_doc.sh

 #!/bin/bash
+set -e
+
+# Create the build directory for CMake.
+mkdir -p $TRAVIS_BUILD_DIR/build
+cd $TRAVIS_BUILD_DIR/build
 
-# Add set -e, cd to directory.
-source ./common.sh
 # Compile Documentation only.
-cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_Fortran_COMPILER=/usr/bin/gfortran-4.8 -DWITH_GPU=OFF -DWITH_DOC=OFF -DWITH_STYLE_CHECK=OFF ${EXTRA_CMAKE_OPTS}
+cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=OFF -DWITH_STYLE_CHECK=OFF
 mkdir output
 make -j `nproc`
 find .. -name '*whl' | xargs pip install  # install all wheels.
 rm -rf *
-cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_Fortran_COMPILER=/usr/bin/gfortran-4.8 -DWITH_GPU=OFF -DWITH_DOC=ON ${EXTRA_CMAKE_OPTS}
-make paddle_docs paddle_docs_cn
+cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_GPU=OFF -DWITH_DOC=ON
+make -j `nproc` paddle_docs paddle_docs_cn
 
 # check websites for broken links
 linkchecker doc/en/html/index.html

paddle/scripts/travis/precommit.sh → paddle/scripts/travis/check_style.sh

 #!/bin/bash
 function abort(){
-    echo "Your commit not fit PaddlePaddle code style" 1>&2
-    echo "Please use pre-commit scripts to auto-format your code" 1>&2
+    echo "Your change doesn't follow PaddlePaddle's code style." 1>&2
+    echo "Please use pre-commit to reformat your code and git push again." 1>&2
     exit 1
 }
 
 trap 'abort' 0
 set -e
-source common.sh
-cd ..
+
+cd $TRAVIS_BUILD_DIR
 export PATH=/usr/bin:$PATH
 pre-commit install
 clang-format --version

paddle/scripts/travis/main.sh

 #!/bin/bash
 cd `dirname $0`
 
-if [ ${JOB} == "BUILD_AND_TEST" ]; then
-  ./build_and_test.sh
-elif [ ${JOB} == "DOCS" ]; then
-  ./docs.sh
+if [ ${JOB} == "DOCS" ]; then
+  ./build_doc.sh
 elif [ ${JOB} == "PRE_COMMIT" ]; then
-  ./precommit.sh
+  ./check_style.sh
 else
-  echo Unknown job ${JOB}
-  exit 1
+  echo "Unknown Travis CI job: ${JOB}"
+  exit 0 # Don't fail due to unknown Travis CI job.
 fi