add snappy cache

Former-commit-id: 1e598b7d393b48328910f7d4d340547067bd1058

cpp/cmake/ThirdPartyPackages.cmake

@@ -1757,10 +1757,9 @@ macro(build_snappy)
         set(SNAPPY_CACHE_URL "${JFROG_ARTFACTORY_CACHE_URL}/${SNAPPY_CACHE_PACKAGE_NAME}")
         set(SNAPPY_CACHE_PACKAGE_PATH "${THIRDPARTY_PACKAGE_CACHE}/${SNAPPY_CACHE_PACKAGE_NAME}")
 
-        file(DOWNLOAD ${SNAPPY_CACHE_URL} ${SNAPPY_CACHE_PACKAGE_PATH} STATUS status)
-        list(GET status 0 status_code)
-        message(STATUS "DOWNLOADING FROM ${SNAPPY_CACHE_URL} TO ${SNAPPY_CACHE_PACKAGE_PATH}. STATUS = ${status_code}")
-        if (NOT status_code EQUAL 0)
+        execute_process(COMMAND wget -q --method HEAD ${SNAPPY_CACHE_URL} RESULT_VARIABLE return_code)
+        message(STATUS "Check the remote file ${SNAPPY_CACHE_URL}. return code = ${return_code}")
+        if (NOT return_code EQUAL 0)
             externalproject_add(snappy_ep
                     ${EP_LOG_OPTIONS}
                     BUILD_COMMAND
@@ -1779,7 +1778,12 @@ macro(build_snappy)
 
             ExternalProject_Create_Cache(snappy_ep ${SNAPPY_CACHE_PACKAGE_PATH} "${CMAKE_CURRENT_BINARY_DIR}/snappy_ep-prefix" ${JFROG_USER_NAME} ${JFROG_PASSWORD} ${SNAPPY_CACHE_URL})
         else()
-            ExternalProject_Use_Cache(snappy_ep ${SNAPPY_CACHE_PACKAGE_PATH} ${CMAKE_CURRENT_BINARY_DIR})
+            file(DOWNLOAD ${SNAPPY_CACHE_URL} ${SNAPPY_CACHE_PACKAGE_PATH} STATUS status)
+            list(GET status 0 status_code)
+            message(STATUS "DOWNLOADING FROM ${SNAPPY_CACHE_URL} TO ${SNAPPY_CACHE_PACKAGE_PATH}. STATUS = ${status_code}")
+            if (status_code EQUAL 0)
+                ExternalProject_Use_Cache(snappy_ep ${SNAPPY_CACHE_PACKAGE_PATH} ${CMAKE_CURRENT_BINARY_DIR})
+            endif()
         endif()
     else()
         externalproject_add(snappy_ep