Add a dev settings feature, keyed off codename right now

plugin/src/init.server.lua

@@ -0,0 +1,68 @@
+if not plugin then
+	return
+end
+
+local Session = require(script.Session)
+local Config = require(script.Config)
+local Version = require(script.Version)
+local Logging = require(script.Logging)
+local DevSettings = require(script.DevSettings)
+
+--[[
+	Check if the user is using a newer version of Rojo than last time. If they
+	are, show them a reminder to make sure they check their server version.
+]]
+local function checkUpgrade()
+	-- When developing Rojo, there's no use in doing version checks
+	if DevSettings:isEnabled() then
+		return
+	end
+
+	local lastVersion = plugin:GetSetting("LastRojoVersion")
+
+	if lastVersion then
+		local wasUpgraded = Version.compare(Config.version, lastVersion) == 1
+
+		if wasUpgraded then
+			local message = (
+				"\nRojo detected an upgrade from version %s to version %s." ..
+				"\nMake sure you have also upgraded your server!" ..
+				"\n\nRojo plugin version %s is intended for use with server version %s.\n"
+			):format(
+				Version.display(lastVersion), Version.display(Config.version),
+				Version.display(Config.version), Config.expectedServerVersionString
+			)
+
+			print(message)
+		end
+	end
+
+	plugin:SetSetting("LastRojoVersion", Config.version)
+end
+
+local function main()
+	local displayedVersion = DevSettings:isEnabled() and "DEV" or Version.display(Config.version)
+
+	Logging.trace("Rojo %s initialized", displayedVersion)
+
+	local toolbar = plugin:CreateToolbar("Rojo " .. displayedVersion)
+
+	local currentSession
+
+	-- TODO: More robust session tracking to handle errors
+	-- TODO: Icon!
+	toolbar:CreateButton("Connect", "Connect to Rojo Session", "")
+		.Click:Connect(function()
+			checkUpgrade()
+
+			if currentSession ~= nil then
+				Logging.warn("A session is already running!")
+				return
+			end
+
+			Logging.info("Started new session.")
+			currentSession = Session.new()
+		end)
+end
+
+main()