Enable lj-releng tool to lint lua code.

rootfs/etc/nginx/lua/balancer/chash.lua

@@ -3,12 +3,14 @@ local resty_chash = require("resty.chash")
 local util = require("util")
 local ngx_log = ngx.log
 local ngx_ERR = ngx.ERR
+local setmetatable = setmetatable
 
 local _M = balancer_resty:new({ factory = resty_chash, name = "chash" })
 
 function _M.new(self, backend)
   local nodes = util.get_nodes(backend.endpoints)
-  local complex_val, err = util.parse_complex_value(backend["upstreamHashByConfig"]["upstream-hash-by"])
+  local complex_val, err =
+    util.parse_complex_value(backend["upstreamHashByConfig"]["upstream-hash-by"])
   if err ~= nil then
     ngx_log(ngx_ERR, "could not parse the value of the upstream-hash-by: ", err)
   end

rootfs/etc/nginx/lua/balancer/chashsubset.lua

@@ -5,6 +5,11 @@ local resty_chash = require("resty.chash")
 local util = require("util")
 local ngx_log = ngx.log
 local ngx_ERR = ngx.ERR
+local setmetatable = setmetatable
+local tostring = tostring
+local math = math
+local table = table
+local pairs = pairs
 
 local _M = { name = "chashsubset" }
 
@@ -46,7 +51,8 @@ end
 
 function _M.new(self, backend)
   local subset_map, subsets = build_subset_map(backend)
-  local complex_val, err = util.parse_complex_value(backend["upstreamHashByConfig"]["upstream-hash-by"])
+  local complex_val, err =
+    util.parse_complex_value(backend["upstreamHashByConfig"]["upstream-hash-by"])
   if err ~= nil then
     ngx_log(ngx_ERR, "could not parse the value of the upstream-hash-by: ", err)
   end

rootfs/etc/nginx/lua/balancer/ewma.lua

@@ -9,6 +9,14 @@ local resty_lock = require("resty.lock")
 local util = require("util")
 local split = require("util.split")
 
+local ngx = ngx
+local math = math
+local pairs = pairs
+local ipairs = ipairs
+local tostring = tostring
+local string = string
+local tonumber = tonumber
+local setmetatable = setmetatable
 local string_format = string.format
 local ngx_log = ngx.log
 local INFO = ngx.INFO
@@ -185,7 +193,8 @@ function _M.after_balance(_)
 end
 
 function _M.sync(self, backend)
-  local normalized_endpoints_added, normalized_endpoints_removed = util.diff_endpoints(self.peers, backend.endpoints)
+  local normalized_endpoints_added, normalized_endpoints_removed =
+    util.diff_endpoints(self.peers, backend.endpoints)
 
   if #normalized_endpoints_added == 0 and #normalized_endpoints_removed == 0 then
     ngx.log(ngx.INFO, "endpoints did not change for backend " .. tostring(backend.name))

rootfs/etc/nginx/lua/balancer/resty.lua

@@ -3,6 +3,7 @@ local util = require("util")
 local string_format = string.format
 local ngx_log = ngx.log
 local INFO = ngx.INFO
+local setmetatable = setmetatable
 
 local _M = {}
 

rootfs/etc/nginx/lua/balancer/round_robin.lua

@@ -2,6 +2,8 @@ local balancer_resty = require("balancer.resty")
 local resty_roundrobin = require("resty.roundrobin")
 local util = require("util")
 
+local setmetatable = setmetatable
+
 local _M = balancer_resty:new({ factory = resty_roundrobin, name = "round_robin" })
 
 function _M.new(self, backend)

rootfs/etc/nginx/lua/balancer/sticky.lua

@@ -4,6 +4,13 @@ local ngx_balancer = require("ngx.balancer")
 local split = require("util.split")
 local same_site = require("util.same_site")
 
+local ngx = ngx
+local pairs = pairs
+local ipairs = ipairs
+local string = string
+local tonumber = tonumber
+local setmetatable = setmetatable
+
 local _M = balancer_resty:new()
 local DEFAULT_COOKIE_NAME = "route"
 
@@ -64,7 +71,8 @@ function _M.set_cookie(self, value)
   }
 
   if self.cookie_session_affinity.expires and self.cookie_session_affinity.expires ~= "" then
-      cookie_data.expires = ngx.cookie_time(ngx.time() + tonumber(self.cookie_session_affinity.expires))
+      cookie_data.expires = ngx.cookie_time(ngx.time() +
+        tonumber(self.cookie_session_affinity.expires))
   end
 
   if self.cookie_session_affinity.maxage and self.cookie_session_affinity.maxage ~= "" then
@@ -132,8 +140,8 @@ function _M.balance(self)
   end
 
   local last_failure = self.get_last_failure()
-  local should_pick_new_upstream = last_failure ~= nil and self.cookie_session_affinity.change_on_failure or
-    upstream_from_cookie == nil
+  local should_pick_new_upstream = last_failure ~= nil and
+    self.cookie_session_affinity.change_on_failure or upstream_from_cookie == nil
 
   if not should_pick_new_upstream then
     return upstream_from_cookie

rootfs/etc/nginx/lua/balancer/sticky_balanced.lua

@@ -9,6 +9,10 @@ local math_random = require("math").random
 local resty_chash = require("resty.chash")
 local util_get_nodes = require("util").get_nodes
 
+local ngx = ngx
+local string = string
+local setmetatable = setmetatable
+
 local _M = balancer_sticky:new()
 
 -- Consider the situation of N upstreams one of which is failing.

rootfs/etc/nginx/lua/balancer/sticky_persistent.lua

@@ -6,6 +6,7 @@
 local balancer_sticky = require("balancer.sticky")
 local util_get_nodes = require("util").get_nodes
 local util_nodemap = require("util.nodemap")
+local setmetatable = setmetatable
 
 local _M = balancer_sticky:new()