build: increase retry time for make testfront to 5

.ci/common.sh

@@ -30,6 +30,33 @@ travis_retry() {
   return $result
 }
 
+retry_cmd() {
+  local result=0
+  local count=1
+  set +e
+
+  retry_cnt=$1
+  shift 1
+
+  while [ $count -le ${retry_cnt} ]; do
+    [ $result -ne 0 ] && {
+      echo -e "\n${ANSI_RED}The command \"$@\" failed. Retrying, $count of ${retry_cnt}${ANSI_RESET}\n" >&2
+    }
+    "$@"
+    result=$?
+    [ $result -eq 0 ] && break
+    count=$(($count + 1))
+    sleep 1
+  done
+
+  [ $count -gt ${retry_cnt} ] && {
+    echo -e "\n${ANSI_RED}The command \"$@\" failed ${retry_cnt} times.${ANSI_RESET}\n" >&2
+  }
+
+  set -e
+  return $result
+}
+
 export PATH=$PWD/bin:$PATH
 export PATH=$PATH:${TRAVIS_BUILD_DIR}/install/bin
 if [ -f ${TRAVIS_BUILD_DIR}/install/bin/luarocks ]; then

.ci/script.sh

@@ -5,7 +5,7 @@ source "${CI_DIR}/common.sh"
 
 travis_retry make fetchthirdparty
 make all
-travis_retry make testfront
+retry_cmd 6 make testfront
 set +o pipefail
 luajit $(which luacheck) --no-color -q frontend | tee ./luacheck.out
 test $(grep Total ./luacheck.out | awk '{print $2}') -le 63