small update to the flock locking behavior for git status updating

bin/_git-fetch

@@ -26,7 +26,11 @@ touch "${PROCESS_LOCK_FILE}"
     chmod 666 "${PROCESS_LOCK_FILE}"
 
     if [ -e "${UPDATE_STATUS_FILE}" ]; then
-        read FETCH_TIMESTAMP OTHER < "${UPDATE_STATUS_FILE}"
+        {
+            flock --timeout 2 --shared 9 || exit_error "Failed to shared acquire ${UPDATE_STATUS_LOCK_FILE} in _git-fetch"
+
+            read FETCH_TIMESTAMP OTHER < "${UPDATE_STATUS_FILE}"
+        } 9<"${UPDATE_STATUS_LOCK_FILE}"
 
         CURRENT_TIMESTAMP=$(date +%s)
 
@@ -72,7 +76,7 @@ touch "${PROCESS_LOCK_FILE}"
 
         CURRENT_TIMESTAMP=$(date +%s)
         {
-            flock --timeout 10 --exclusive 9 || exit 0
+            flock --timeout 10 --exclusive 9 || exit_error "Failed to exclusively acquire ${UPDATE_STATUS_LOCK_FILE}"
 
             echo "${CURRENT_TIMESTAMP} ${UPDATE_COUNT}" > "${UPDATE_STATUS_FILE}"
         } 9<"${UPDATE_STATUS_LOCK_FILE}"

bin/crucible

@@ -58,14 +58,15 @@ if [ "${1}" != "update" ]; then
     ${CRUCIBLE_HOME}/bin/_git-fetch &
     if [ -e "${UPDATE_STATUS_FILE}" ]; then
         {
-            flock --timeout 2 --shared 9 || exit 0
+            flock --timeout 2 --shared 9 || exit_error "Failed to shared acquire ${UPDATE_STATUS_LOCK_FILE}"
 
             read OTHER UPDATE_COUNT < "${UPDATE_STATUS_FILE}"
-            if [ "${UPDATE_COUNT}" != "0" ]; then
-                echo "*** NOTICE: Crucible is at least ${UPDATE_COUNT} commits behind.  See 'crucible repo info' for details. ***"
-                echo
-            fi
         } 9<"${UPDATE_STATUS_LOCK_FILE}"
+
+        if [ "${UPDATE_COUNT}" != "0" ]; then
+            echo "*** NOTICE: Crucible is at least ${UPDATE_COUNT} commits behind.  See 'crucible repo info' for details. ***"
+            echo
+        fi
     fi
 fi