docker tweaking 2

build.sh

@@ -59,9 +59,9 @@ install_runtime() {
     test -d "${AXITOOLS_HOME}" || mkdir -p "${AXITOOLS_HOME}/lib"
     pushd "${AXITOOLS_HOME}"
     echo "installing ShellB3 tar ball into ${AXITOOLS_HOME}..."
-    tar xf "${RUNTIME}/${SB3_TARBALL}" || oops "SB3 tar ball would not extract"
+    test -d ShellB3 || tar xf "${RUNTIME}/${SB3_TARBALL}" || oops "SB3 tar ball would not extract"
     popd
-    test -d "$RUNTIME_EXPECTED_LOCATION" && (mkdir ${RUNTIME_EXPECTED_LOCATION}; ln -s $AXITOOLS_HOME/ShellB3 $RUNTIME_EXPECTED_LOCATION)
+    test -d "$RUNTIME_EXPECTED_LOCATION" || (mkdir ${RUNTIME_EXPECTED_LOCATION}; ln -s $AXITOOLS_HOME/ShellB3 $RUNTIME_EXPECTED_LOCATION)
     $RUNTIME_EXPECTED_LOCATION/ShellB3/bin/python3 -c "import netCDF4, numpy, cartopy" || oops "non-viable python runtime install"
 }