Adding luacheck to travis

Author: ShelbyZ

.luacheckrc

@@ -0,0 +1,14 @@
+formatter = "plain"
+std = "luajit"
+
+codes = true
+unused = false
+unused_args = false
+global = false
+max_line_length = false
+ignore = {
+    "3.",
+    "4.",
+    "5.",
+    "6."
+}

.travis.yml

@@ -16,6 +16,7 @@ addons:
       - mysql-client-core-5.6
       - mysql-server-5.6
       - mysql-client-5.6
+      - luarocks
 
 install:
   - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 90
@@ -28,4 +29,5 @@ before_script:
 script:
   - ./configure
   - make
-  - sh travis_sql.sh 
+  - sh travis_sql.sh
+  - sh travis_lua.sh

travis_lua.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+luarocks install luacheck --local
+luarocks install lanes --local
+
+luacheck scripts -j 4
+exit $?