Prepare the travis run to use a matrix of options

.travis.yml

@@ -14,8 +14,8 @@ install:
   - tar -xf cmake-3.7.1-Linux-x86_64.tar.gz
   - export PATH="${PWD}/cmake-3.7.1-Linux-x86_64/bin:${PATH}"
   - pip install --user flake8
+env:
+  - BUILD_MATRIX_ENTRY=format
 script:
-  - cd ${TRAVIS_BUILD_DIR}
-  - scripts/travis/run-clang-format.sh
-  - ~/.local/bin/flake8 --config=flake8.cfg .
+  - ${TRAVIS_BUILD_DIR}/scripts/travis/run.sh
  

scripts/travis/run-clang-format.sh → scripts/travis/run-format.sh

 #!/usr/bin/env bash
 
-if [ -z "${TRAVIS_PULL_REQUEST_BRANCH}" ]
+if [ -z "${SOURCE_DIR}" ]
 then
-  echo "This is only designed to run on Pull Requests"
+  echo "Error: SOURCE_DIR is empty or undefined"
   exit 1
-else
-  COMMIT_RANGE="${TRAVIS_COMMIT_RANGE/.../ }"
 fi
+if [ -z "${COMMIT_RANGE}" ]
+then
+  echo "Error: COMMIT_RANGE is empty or undefined"
+  exit 1
+fi
+
+cd ${SOURCE_DIR}
 
-# Run clang-format
-DIFF="$(${TRAVIS_BUILD_DIR}/scripts/developer/git/git-clang-format --diff ${COMMIT_RANGE})"
+# Check C and C++ code with clang-format
+DIFF="$(./scripts/developer/git/git-clang-format --diff ${COMMIT_RANGE})"
 if [ "${DIFF}" != "no modified files to format" ]
 then
   echo "clang-format:"
@@ -21,4 +26,10 @@ then
   exit 1
 fi
 
+# Check python code with flake8
+if ! ~/.local/bin/flake8 --config=flake8.cfg .
+then
+  exit 3
+fi
+
 exit 0

scripts/travis/run.sh

+#!/usr/bin/env bash
+
+
+export SOURCE_DIR=${TRAVIS_BUILD_DIR}
+export BUILD_DIR=$(readlink -f ${SOURCE_DIR}/..)
+export COMMIT_RANGE="${TRAVIS_COMMIT_RANGE/.../ }"
+
+case ${BUILD_MATRIX_ENTRY} in
+  format)
+    echo "Running formatting tests"
+    if ! ${SOURCE_DIR}/scripts/travis/run-format.sh; then
+      exit 1;
+    fi
+    ;;
+  *)
+    echo "Error: BUILD_MATRIX_ENTRY is undefined or set to an unknown value"
+    exit 1;
+    ;;
+esac