Let the build script abort in case of network issues

auto_build.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env sh
 
+#set -x  # Display the value of PS4, followed by the command and its arguments.
 set -e  # Exit immediately if a command exits with a non-zero status.
 set -u  # Treat unset variables as an error when substituting.
 
@@ -28,12 +29,15 @@ purge_local () {
 # clone repo if not already there
 clone_local () {
     if [ ! -d "$CLONE_DIR" ]; then
-        git clone \
+        if ! git clone \
             --quiet \
             --branch "$BRANCH" \
             --recurse-submodules \
             "${GIT_BASE}/${OWNER}/${REPO}.git" \
             "$CLONE_DIR"
+        then
+            exit 1
+        fi
     fi
 }
 
@@ -69,11 +73,14 @@ latest_local_sha () {
 
 # get latest commit id of server
 latest_remote_sha () {
-    curl -sq \
+    if ! curl --silent --fail --show-error \
         -X GET \
         -H "accept: application/json" \
         "${GIT_BASE}/api/v1/repos/${OWNER}/${REPO}/commits?sha=${BRANCH}&limit=1" \
     | jq -M -r '.[0].sha'
+    then
+        exit 1
+    fi
 }