First pass at a Jenkins install script

devtools/ci/jenkins/install.sh

+# This script is executed via the line:
+#   source devtools/ci/jenkins/install.sh
+# in a bash shell with the -lex options turned on
+
+echo "Using the following SWIG (`which swig`) version:"
+swig -version
+
+echo "Using cmake (`which cmake`) version":
+cmake --version
+
+echo "Using clang (`which clang`) version:"
+clang -version
+
+module load cuda conda/jenkins
+
+# Constants
+CONDAENV=openmm-test-3.5
+BUILD_DIRECTORY="${WORKSPACE}/openmm-build"
+INSTALL_DIRECTORY="${WORKSPACE}/openmm-install"
+SRC_DIRECTORY="${WORKSPACE}/openmm-src" # set in the Jenkins configuration
+
+# Create a conda environment, but clean up after one first. If it doesn't exist, don't complain.
+# But since we are invoking this shell with -e (exit on all errors), we need || true to prevent this
+# command from crashing the whole shell
+conda remove -yn ${CONDAENV} --all --quiet || true
+conda create -yn ${CONDAENV} python=3.5 --no-default-packages --quiet
+conda install -yn ${CONDAENV} numpy scipy pytest --quiet
+source activate ${CONDAENV} # enter our new environment
+
+# Build OpenMM
+CMAKE_FLAGS="-DCMAKE_INSTALL_PREFIX=\"${INSTALL_DIRECTORY}\" -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang"
+cd $BUILD_DIRECTORY
+cmake $CMAKE_FLAGS ${SRC_DIRECTORY}
+make -j4 install
+make PythonInstall
+
+# Now run the tests
+python -m simtk.testInstallation
+cd python/tests && py.test -v
+python devtools/run-ctest.py --start-time $START_TIME
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