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local function searchUnusedLocals(results, callback)
for _, var in ipairs(results.locals) do
if var.key == 'self'
or var.key == '_'
or var.key == '_ENV'
then
goto NEXT_VAR
end
for _, info in ipairs(var) do
if info.type == 'get' then
goto NEXT_VAR
end
if info.type == 'local' then
if info.source.start == 0 then
goto NEXT_VAR
end
end
end
callback(var.source.start, var.source.finish, var.key)
::NEXT_VAR::
end
end
local function searchUndefinedGlobal(results, callback)
local env = results.locals[1]
for index, field in pairs(env.value.child) do
if field.value.lib then
goto NEXT_VAR
end
if type(index) ~= 'string' then
goto NEXT_VAR
end
local lIndex = index:lower()
if lIndex == 'log' or lIndex == 'arg' then
goto NEXT_VAR
end
if not index:find '%l' then
goto NEXT_VAR
end
if #field >= 3 then
goto NEXT_VAR
end
for _, info in ipairs(field) do
if info.type == 'set' then
goto NEXT_VAR
end
end
for _, info in ipairs(field) do
if info.type == 'get' then
callback(info.source.start, info.source.finish, tostring(index))
end
end
::NEXT_VAR::
end
end
local function searchUnusedLabel(results, callback)
for _, label in ipairs(results.labels) do
for _, info in ipairs(label) do
if info.type == 'goto' then
goto NEXT_LABEL
end
end
for _, info in ipairs(label) do
if info.type == 'set' then
callback(info.source.start, info.source.finish, label.key)
end
end
::NEXT_LABEL::
end
end
local function serachSpaces(lines, callback)
for i = 1, #lines do
local line = lines:line(i)
if line:find '^[ \t]+$' then
local start, finish = lines:range(i)
callback(start, finish, 'Line with spaces only') -- LOCALE
goto NEXT_LINE
end
local pos = line:find '[ \t]+$'
if pos then
local start, finish = lines:range(i)
callback(start + pos - 1, finish, 'Line with postspace') -- LOCALE
goto NEXT_LINE
end
::NEXT_LINE::
end
end
local function searchRedefinition(results, uri, callback)
for _, var in ipairs(results.locals) do
if var.key == '_'
or var.key == '_ENV'
then
goto NEXT_VAR
end
local shadow = var.shadow
if not shadow then
goto NEXT_VAR
end
-- 如果多次重定义，则不再警告
if #shadow >= 3 then
goto NEXT_VAR
end
local related = {}
for i = 1, #shadow do
related[i] = {
start = shadow[i].source.start,
finish = shadow[i].source.finish,
uri = uri,
}
end
callback(var.source.start, var.source.finish, var.key, related)
::NEXT_VAR::
end
end
local function searchNewLineCall(results, lines, callback)
for _, call in ipairs(results.calls) do
if not call.nextObj then
goto NEXT_CALL
end
if not call.lastObj.start then
goto NEXT_CALL
end
local callline = lines:rowcol(call.args.start)
local lastline = lines:rowcol(call.lastObj.finish)
if callline > lastline then
callback(call.args.start, call.args.finish)
end
::NEXT_CALL::
end
end
local function searchRedundantParameters(results, callback)
for _, call in ipairs(results.calls) do
if not call.func.built then
goto NEXT_CALL
end
if call.func.hasDots then
goto NEXT_CALL
end
if not call.func.args then
return
end
local max = #call.func.args
local passed = #call.args
for i = max + 1, passed do
local source = call.args[i]
callback(source.start, source.finish, max, passed)
end
::NEXT_CALL::
end
end
return function (vm, lines, uri)
local datas = {}
local results = vm.results
-- 未使用的局部变量
searchUnusedLocals(results, function (start, finish, key)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Information',
message = ('Unused local `%s`'):format(key), -- LOCALE
}
end)
-- 读取未定义全局变量
searchUndefinedGlobal(results, function (start, finish, key)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Warning',
message = ('Undefined global `%s`'):format(key), -- LOCALE
}
end)
-- 未使用的Label
searchUnusedLabel(results, function (start, finish, key)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Information',
message = ('Unused label `%s`'):format(key), -- LOCALE
}
end)
-- 只有空格与制表符的行，以及后置空格
serachSpaces(lines, function (start, finish, message)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Information',
message = message,
}
end)
-- 重定义局部变量
searchRedefinition(results, uri, function (start, finish, key, related)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Information',
message = ('Redefined local `%s`'):format(key), -- LOCALE
related = related,
}
end)
-- 以括号开始的一行（可能被误解析为了上一行的call）
searchNewLineCall(results, lines, function (start, finish)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Warning',
message = 'Parsed as function call for the previous line. It may be necessary to add a `;` before.', -- LOCALE
}
end)
-- 调用函数时的参数数量是否超过函数的接收数量
searchRedundantParameters(results, function (start, finish, max, passed)
datas[#datas+1] = {
start = start,
finish = finish,
level = 'Warning',
message = ('The function takes only %d parameters, but you pass %d.'):format(max, passed), -- LOCALE
}
end)
return datas
end
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