TST: Update travis-test.py from master

Author: charris

tools/travis-test.sh

@@ -48,7 +48,7 @@ setup_base()
   if [ -z "$USE_DEBUG" ]; then
     $PIP install -v . 2>&1 | tee log
   else
-    # Python3.5-dbg on travis seems to need this
+    # The job run with USE_DEBUG=1 on travis needs this.
     export CFLAGS=$CFLAGS" -Wno-maybe-uninitialized"
     $PYTHON setup.py build build_src --verbose-cfg build_ext --inplace 2>&1 | tee log
   fi
@@ -65,7 +65,13 @@ setup_base()
 
 run_test()
 {
-  $PIP install -r test_requirements.txt
+  # Install the test dependencies.
+  # Clear PYTHONOPTIMIZE when running `pip install -r test_requirements.txt`
+  # because version 2.19 of pycparser (a dependency of one of the packages
+  # in test_requirements.txt) does not provide a wheel, and the source tar
+  # file does not install correctly when Python's optimization level is set
+  # to strip docstrings (see https://github.com/eliben/pycparser/issues/291).
+  PYTHONOPTIMIZE="" $PIP install -r test_requirements.txt
 
   if [ -n "$USE_DEBUG" ]; then
     export PYTHONPATH=$PWD
@@ -135,16 +141,11 @@ run_test()
   fi
 }
 
+
 export PYTHON
 export PIP
-$PIP install setuptools
 
 if [ -n "$USE_WHEEL" ] && [ $# -eq 0 ]; then
-  # Build wheel
-  $PIP install wheel
-  # ensure that the pip / setuptools versions deployed inside
-  # the venv are recent enough
-  $PIP install -U virtualenv
   # ensure some warnings are not issued
   export CFLAGS=$CFLAGS" -Wno-sign-compare -Wno-unused-result"
   # adjust gcc flags if C coverage requested
@@ -155,7 +156,7 @@ if [ -n "$USE_WHEEL" ] && [ $# -eq 0 ]; then
      export F90='gfortran --coverage'
      export LDFLAGS='--coverage'
   fi
-  $PYTHON setup.py build build_src --verbose-cfg bdist_wheel
+  $PYTHON setup.py build --warn-error build_src --verbose-cfg bdist_wheel
   # Make another virtualenv to install into
   virtualenv --python=`which $PYTHON` venv-for-wheel
   . venv-for-wheel/bin/activate
@@ -167,8 +168,6 @@ if [ -n "$USE_WHEEL" ] && [ $# -eq 0 ]; then
   run_test
 
 elif [ -n "$USE_SDIST" ] && [ $# -eq 0 ]; then
-  # use an up-to-date pip / setuptools inside the venv
-  $PIP install -U virtualenv
   # temporary workaround for sdist failures.
   $PYTHON -c "import fcntl; fcntl.fcntl(1, fcntl.F_SETFL, 0)"
   # ensure some warnings are not issued