CI: added luacheck in CI. (#68)

.luacheckrc

@@ -1 +1,3 @@
 std = "ngx_lua"
+unused_args = false
+redefined = false

.travis.yml

@@ -16,6 +16,7 @@ addons:
       - etcd
       - luarocks
       - cmake
+      - lua-check
 
 cache:
   directories:
@@ -39,4 +40,5 @@ script:
   - export PATH=$OPENRESTY_PREFIX/nginx/sbin:$PATH
   - sudo service etcd start
   - sudo apisix init_etcd
+  - luacheck -q lua
   - make test

lua/apisix/core/lrucache.lua

@@ -12,7 +12,6 @@ local log = require("apisix.core.log")
 
 
 local _M = {version = 0.1}
-local mt = { __index = _M }
 
 
 local function global_lru(key, version, create_obj_fun, ...)

lua/apisix/core/yaml.lua

@@ -61,14 +61,14 @@ function class.__meta.__call(cls, ...)
   return self
 end
 
-function class.def(base, type, cls)
+function class.def(base, typ, cls)
   base = base or class
   local mt = {__metatable=base, __index=base}
   for k, v in pairs(base.__meta) do mt[k] = v end
   cls = setmetatable(cls or {}, mt)
   cls.__index = cls
   cls.__metatable = cls
-  cls.__type = type
+  cls.__type = typ
   cls.__meta = mt
   return cls
 end

lua/apisix/plugins/prometheus.lua

@@ -1,5 +1,4 @@
 local exporter = require("apisix.plugins.prometheus.exporter")
-local core = require("apisix.core")
 local plugin_name = "prometheus"