Fix coverage; try to install clang via apt

.travis.yml

@@ -11,19 +11,21 @@ env:
         - NUMPY_VER=1.16
     matrix:
         - HPAT_CHECK_STYLE=True
-        - HPAT_RUN_BUILD=True
         - HPAT_RUN_BUILD=True HPAT_WHEELS=True
         - HPAT_RUN_BUILD=True HPAT_RUN_COVERAGE=True
         - HPAT_RUN_BUILD=True HPAT_CONFIG_MPI=False
     allow_failures:
-        - HPAT_CHECK_STYLE=True
-        - HPAT_RUN_BUILD=True HPAT_WHEELS=True
-        - HPAT_RUN_BUILD=True HPAT_RUN_COVERAGE=True
-        - HPAT_RUN_BUILD=True HPAT_CONFIG_MPI=False
+        - env: HPAT_CHECK_STYLE=True
+        - env: HPAT_RUN_BUILD=True HPAT_CONFIG_MPI=False
 
 before_install:
     - buildscripts/setup_conda.sh
     - export PATH=$HOME/miniconda3/bin:$PATH
+    - if [ "$HPAT_CHECK_STYLE" == "True" ]; then
+        sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y;
+        sudo apt-get update -q;
+        sudo apt-get install clang -y;
+      fi
 
 install:
     - export PATH=$HOME/miniconda3/bin:$PATH

buildscripts/code_style.sh

@@ -6,4 +6,6 @@ find / -name clang-format
 ls /usr/lib/ | grep clang
 ls /usr/bin/ | grep clang-format
 
-python ./setup.py style
+python ./setup.py style
+
+flake8 ./

buildscripts/hpat-conda-recipe/run_test.sh

@@ -17,7 +17,6 @@ fi
 if [ "$HPAT_RUN_COVERAGE" == "True" ]; then
   coverage erase
   coverage run --source=${HPAT_SOURCE_DIR} --omit ${HPAT_SOURCE_DIR}/ml/*,${HPAT_SOURCE_DIR}/xenon_ext.py,${HPAT_SOURCE_DIR}/ros.py,${HPAT_SOURCE_DIR}/cv_ext.py,${HPAT_SOURCE_DIR}/tests/* ${HPAT_SOURCE_DIR}/runtests.py
-  coverage combine
   coveralls -v
 else
   #Link check for Documentation using Sphinx's in-built linkchecker

buildscripts/setup_conda.sh

@@ -24,9 +24,7 @@ export PATH=$HOME/miniconda3/bin:$PATH
 conda create -n $CONDA_ENV -q -y python=$PYTHON_VER
 source activate $CONDA_ENV
 # Install conda-build and numpy with pycodestyle (required for style check)
-$CONDA_INSTALL conda-build numpy pycodestyle clang pip -c conda-forge
+$CONDA_INSTALL conda-build -c conda-forge
 if [ "$HPAT_CHECK_STYLE" == "True" ]; then
-  sudo apt-get install clang-format
-  clang-format --version
-  which clang-format
+  $CONDA_INSTALL numpy pycodestyle flake8 -c conda-forge
 fi