cause build.sh to exit if pio tasks fail

build.sh

@@ -75,6 +75,7 @@ function show_help {
   echo "    ./build.sh -cb        # for CLEAN + BUILD of current target in platformio-local.ini"
   echo "    ./build.sh -m         # View FujiNet Monitor"
   echo "    ./build.sh -cbum      # Clean/Build/Upload to FN/Monitor"
+  echo "    ./build.sh -f         # Upload filesystem"
   echo ""
   echo "Supported boards:"
   echo ""
@@ -161,6 +162,10 @@ if [ ! -z "$PC_TARGET" ] ; then
   else
     cmake "$GEN_CMD" .. -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DFUJINET_TARGET=$PC_TARGET "$@"
   fi
+  if [ $? -ne 0 ]; then
+    echo "cmake failed writing compile commands. Exiting"
+    exit 1
+  fi
   # Run the specific build
   BUILD_TYPE="Release"
   if [ $DEBUG_PC_BUILD -eq 1 ] ; then
@@ -303,6 +308,10 @@ if [ ${AUTOCLEAN} -eq 0 ] ; then
   AUTOCLEAN_ARG="--disable-auto-clean"
 fi
 
+# any stage that fails from this point should stop the script immediately, as they are designed to run
+# on from each other sequentially as long as the previous passed.
+set -e
+
 if [ ${RUN_BUILD} -eq 1 ] ; then
   pio run -c $INI_FILE ${DEV_MODE_ARG} $ENV_ARG $TARGET_ARG $AUTOCLEAN_ARG 2>&1
 fi