Make nulllib.logging optional for other libs

logging.lua

@@ -9,21 +9,39 @@ local loglevels={
 	["TRACE"]=6
 }
 local loglevels_index={}
+local loglevels_abbrev={}
 for k, v in pairs(loglevels) do
 	loglevels_index[v]=k
+	loglevels_abbrev[k:sub(1,1)]=v
+end
+
+local loglevel
+
+---@deprecated use loglevel int
+local loglevel_str="INFO"
+
+
+---@param level string|integer
+function logging.set(level)
+	--                                            +---we can do this
+	--                                            |   becasue each one has
+	--                                            v   a unique letter
+	loglevel=loglevels[level] or loglevels_abbrev[tostring(level):sub(1,1):upper()] or
+		((level >=0 and level <=6) and level) or loglevel
+end
+
+---deprecated wrapper for logging.set, it is intentionally a wrapper instead of
+--an alias because LuaLS docs don't work without doing this
+---@deprecated user logging.set instead, more terse
+function logging.setLogLevel(level)
+	return logging.set(level)
 end
 
 -- default log level
-local loglevel="INFO"
+logging.set("INFO")
-
-function logging.setLogLevel(level)
-	loglevel=loglevels[level] and level or loglevel
-end
-
-logging.setLogLevel("INFO")
 
 local function printLog(severity, ...)
-	if (loglevels[loglevel]) >= severity then
+	if (loglevel) >= severity then
 		log("[" .. loglevels_index[severity] .. "] ", ...)
 	end
 end

sharedconfig.lua

@@ -1,5 +1,13 @@
 local sharedconfig={}
-local logging=require((...):gsub("(.)$", "%1.") .. 'logging')
+
+local fallback=setmetatable({}, {__index=function() return function() end end})
+local function optrequire(...)
+	local status, req=pcall(require, ...)
+	if status then return req end
+	return fallback
+end
+
+local logging=optrequire((...):gsub("(.)$", "%1.") .. 'logging')
 local sharedstate=require((...):gsub("(.)$", "%1.") .. 'sharedstate')
 sharedstate=require('nulllib.sharedstate')
 

sharedstate.lua

@@ -1,5 +1,13 @@
 local sharedstate={}
-local logging=require((...):gsub("(.)$", "%1.") .. 'logging')
+local fallback=setmetatable({}, {__index=function() return function() end end})
+local function optrequire(...)
+	local status, req=pcall(require, ...)
+	if status then return req end
+	return fallback
+end
+
+
+local logging=optrequire((...):gsub("(.)$", "%1.") .. 'logging')
 
 -- function names
 local is_initialized, callback_value, set_value,