[ci] added cpplint check (#2416)

* added cpplint heck

* removed TODO from code

* change order of checks

.ci/test.sh

@@ -50,10 +50,12 @@ if [[ $TRAVIS == "true" ]] && [[ $TASK == "check-docs" ]]; then
     exit 0
 fi
 
-if [[ $TASK == "pylint" ]]; then
+if [[ $TASK == "lint" ]]; then
     conda install -q -y -n $CONDA_ENV pycodestyle pydocstyle
+    pip install --user cpplint
     pycodestyle --ignore=E501,W503 --exclude=./compute,./.nuget . || exit -1
     pydocstyle --convention=numpy --add-ignore=D105 --match-dir="^(?!^compute|test|example).*" --match="(?!^test_|setup).*\.py" . || exit -1
+    cpplint --filter=-build/header_guard,-whitespace/line_length --recursive ./src ./include || exit 0
     exit 0
 fi
 

.travis.yml

@@ -17,7 +17,7 @@ env:
     - TASK=sdist PYTHON_VERSION=2.7
     - TASK=bdist
     - TASK=if-else
-    - TASK=pylint
+    - TASK=lint
     - TASK=check-docs
     - TASK=mpi METHOD=source
     - TASK=mpi METHOD=pip
@@ -31,7 +31,7 @@ matrix:
     - os: osx
       env: TASK=gpu METHOD=pip PYTHON_VERSION=3.6
     - os: osx
-      env: TASK=pylint
+      env: TASK=lint
     - os: osx
       env: TASK=check-docs