[Tarantool-patches] [PATCH v4 3/10] Fix luacheck warnings in extra/dist/tarantoolctl.in

[sergeyb@tarantool.org]

From: Sergey Bronnikov <sergeyb@tarantool.org>

Closes #4681

Reviewed-by: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
Reviewed-by: Igor Munkin <imun@tarantool.org>

Co-authored-by: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
Co-authored-by: Igor Munkin <imun@tarantool.org>
---
 .luacheckrc                |  2 ++
 extra/dist/tarantoolctl.in | 29 +++++++++++++----------------
 2 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/.luacheckrc b/.luacheckrc
index 2683c8c26..0b7dc2dfe 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -24,3 +24,5 @@ exclude_files = {
     ".rocks/**/*.lua",
     ".git/**/*.lua",
 }
+
+files["extra/dist/tarantoolctl.in"] = {ignore = {"212/self", "122", "431"}}
diff --git a/extra/dist/tarantoolctl.in b/extra/dist/tarantoolctl.in
index f5a912ccd..1c980fedc 100755
--- a/extra/dist/tarantoolctl.in
+++ b/extra/dist/tarantoolctl.in
@@ -46,7 +46,6 @@ local instance_dir
 local default_cfg
 local positional_arguments
 local keyword_arguments
-local lua_arguments = arg
 local language
 
 -- function for printing usage reference
@@ -64,13 +63,12 @@ end
 
 local function check_user_level()
     local uid = os.getenv('UID')
-    local udir = nil
     if uid == 0 or os.getenv("NOTIFY_SOCKET") then
         return nil
     end
     -- local dir configuration
     local pwd = os.getenv('PWD')
-    udir = pwd and pwd .. '/.tarantoolctl'
+    local udir = pwd and pwd .. '/.tarantoolctl'
     udir = udir and fio.stat(udir) and udir or nil
     -- or home dir configuration
     local homedir = os.getenv('HOME')
@@ -127,15 +125,15 @@ end
 local function load_default_file(default_file)
     if default_file then
         local env = setmetatable({}, { __index = _G })
-        local ufunc, msg = loadfile(default_file)
+        local ufunc, loaderr = loadfile(default_file)
         -- if load fails - show the last 10 lines of the log file
         if not ufunc then
-            log.error("Failed to load defaults file: %s", msg)
+            log.error("Failed to load defaults file: %s", loaderr)
         end
         debug.setfenv(ufunc, env)
-        local state, msg = pcall(ufunc)
+        local state, err = pcall(ufunc)
         if not state then
-            log.error('Failed to execute defaults file: %s', msg)
+            log.error('Failed to execute defaults file: %s', err)
         end
         default_cfg = env.default_cfg
         instance_dir = env.instance_dir
@@ -790,7 +788,7 @@ end
 local function eval()
     local console_sock_path = uri.parse(console_sock).service
     local filename = arg[3]
-    local code = nil
+    local code
     if filename == nil then
         if stdin_isatty() then
             log.error("Usage:")
@@ -848,7 +846,6 @@ end
 -- xlog / snap file, so even when it stops on LSN >= @a opts.to on
 -- a current file a next file will be processed.
 local function filter_xlog(gen, param, state, opts, cb)
-    local spaces = opts.spaces
     local from, to, spaces = opts.from, opts.to, opts.space
     local show_system, replicas = opts['show-system'], opts.replica
 
@@ -862,7 +859,7 @@ local function filter_xlog(gen, param, state, opts, cb)
         elseif (lsn < from) or (lsn >= to) or
            (not spaces and sid and sid < 512 and not show_system) or
            (spaces and (sid == nil or not find_in_list(sid, spaces))) or
-           (replicas and not find_in_list(rid, replicas)) then
+           (replicas and not find_in_list(rid, replicas)) then -- luacheck: ignore
             -- pass this tuple
         else
             cb(record)
@@ -875,7 +872,7 @@ local function cat()
     local cat_format = opts.format
     local format_cb = cat_formats[cat_format]
     local is_printed = false
-    for id, file in ipairs(positional_arguments) do
+    for _, file in ipairs(positional_arguments) do
         log.error("Processing file '%s'", file)
         local gen, param, state = xlog.pairs(file)
         filter_xlog(gen, param, state, opts, function(record)
@@ -901,7 +898,7 @@ local function play()
     if not remote:wait_connected() then
         error(("Error while connecting to host '%s'"):format(uri))
     end
-    for id, file in ipairs(positional_arguments) do
+    for _, file in ipairs(positional_arguments) do
         log.info(("Processing file '%s'"):format(file))
         local gen, param, state = xlog.pairs(file)
         filter_xlog(gen, param, state, opts, function(record)
@@ -923,7 +920,7 @@ local function play()
 end
 
 local function find_arg(name_arg)
-    for i, key in ipairs(arg) do
+    for _, key in ipairs(arg) do
         if key:find(name_arg) ~= nil then
             return key
         end
@@ -937,7 +934,7 @@ local function rocks()
     local util = require("luarocks.util")
     local command_line = require("luarocks.cmd")
     local options = keyword_arguments
-    local key = nil
+    local key
     if options["only-server"] ~= nil then
         key = find_arg("only%-server")
     else
@@ -954,7 +951,7 @@ local function rocks()
     end
 
     -- Tweak help messages
-    util.see_help = function(command, program)
+    util.see_help = function()
         -- TODO: print extended help message here
         return "See Tarantool documentation for help."
     end
@@ -1321,7 +1318,7 @@ local function usage_command(name, cmd)
     if type(header) == 'string' then
         header = { header }
     end
-    for no, line in ipairs(header) do
+    for _, line in ipairs(header) do
         log.error("    " .. line, name)
     end
 end
-- 
2.23.0