Added some checks for PKIX errors in OpenOS installer

Installer/OpenOS.lua

@@ -0,0 +1,122 @@
+local component = require("component")
+local computer = require("computer")
+local os = require("os")
+
+local gpu = component.gpu
+
+-- Checking if computer is tough enough for such a S T Y L I S H product as MineOS
+do
+	local potatoes = {}
+
+	-- GPU/screen
+	if gpu.getDepth() < 8 or gpu.maxResolution() < 160 then
+		table.insert(potatoes, "Tier 3 graphics card and screen");
+	end
+
+	-- RAM
+	if computer.totalMemory() < 2 * 1024 * 1024 then
+		table.insert(potatoes, "At least 2x tier 3.5 RAM modules");
+	end
+
+	-- HDD
+	do
+		local filesystemFound = false
+
+		for address in component.list("filesystem") do
+			if component.invoke(address, "spaceTotal") >= 2 * 1024 * 1024 then
+				filesystemFound = true
+				break
+			end
+		end
+
+		if not filesystemFound then
+			table.insert(potatoes, "At least tier 2 hard disk drive");
+		end	
+	end
+
+	-- Internet
+	if not component.isAvailable("internet") then
+		table.insert(potatoes, "Internet card");
+	end
+
+	-- EEPROM
+	if not component.isAvailable("eeprom") then
+		table.insert(potatoes, "EEPROM");
+	end
+
+	-- SORRY BRO NOT TODAY
+	if #potatoes > 0 then
+		print("Your computer does not meet the minimum system requirements:")
+
+		for i = 1, #potatoes do
+			print("  ⨯ " .. potatoes[i])
+		end
+
+		return
+	end
+end
+
+-- Checking if installer can be downloaded from GitHub, because of PKIX errors, server blacklists, etc
+do
+	local success, result = pcall(component.internet.request, "https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/Main.lua")
+
+	if not success then
+		if result then
+			if result:match("PKIX") then
+				print("Download server SSL sertificate was rejected by Java. Update your Java version or install sertificate for github.com manually")
+			else
+				print("Download server is unavailable: " .. tostring(result))
+			end
+		else
+			print("Download server is unavailable for unknown reasons")
+		end
+
+		return
+	end
+
+	local deadline = computer.uptime() + 5
+	local message
+
+	while computer.uptime() < deadline do
+		success, message = result.finishConnect()
+
+		if success then
+			break
+		else
+			if message then
+				break
+			else
+				os.sleep(0.1)
+			end
+		end
+	end
+
+	result.close()
+
+	if not success then
+		print("Download server is unavailable. Check if github.com is not blocked by your internet provider or OpenComputers configuration file")
+		return
+	end
+end
+
+-- Flashing EEPROM with tiny script that will run installer itself after reboot.
+-- It's necessary, because we need clean computer without OpenOS hooks to computer.pullSignal()
+component.eeprom.set([[
+	local connection, data, chunk = component.proxy(component.list("internet")()).request("https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/Main.lua"), ""
+	
+	while true do
+		chunk = connection.read(math.huge)
+		
+		if chunk then
+			data = data .. chunk
+		else
+			break
+		end
+	end
+	
+	connection.close()
+	
+	load(data)()
+]])
+
+computer.shutdown(true)

README-ru_RU.md

@@ -27,7 +27,7 @@ MineOS - это графическая операционная система 
 
 Если по какой-то причине ресурс pastebin для вас недоступен, используйте альтернативную команду для установки:
 
-	wget -f https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/BIOS.lua /tmp/bios.lua && flash -q /tmp/bios.lua && reboot
+	wget -f https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/OpenOS.lua /tmp/installer.lua && /tmp/installer.lua
 
 Вы можете вставить её в консоль, используя среднюю кнопку мыши или кнопку Insert (по умолчанию). Спустя некоторое время запустится симпатичный установщик, где вам предложат выбрать предпочитаемый язык, загрузочный диск (можно отформатировать, если нужно), создать профиль пользователя и настроить несколько параметров под себя.
 

README-zh_CN.md

@@ -26,7 +26,7 @@ MineOS是一个拥有GUI的操作系统，运行在Minecraft模组Open Computers
 
 如果由于某种原因无法使用pastebin网站，请使用替代安装命令：
 
-	wget -f https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/BIOS.lua /tmp/bios.lua && flash -q /tmp/bios.lua && reboot
+	wget -f https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/OpenOS.lua /tmp/installer.lua && /tmp/installer.lua
 
 过一会儿，一个制作优良的系统安装程序将会被启动。
 安装程序将提示你选择你的首选语言、选择并格式化引导卷、创建用户配置文件并修改一些设置。

README.md

@@ -27,7 +27,7 @@ The easiest way is to use default `pastebin` script. Insert an OpenOS floppy dis
 
 If for some reason pastebin website is not available to you, use alternative installation command:
 
-	wget -f https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/BIOS.lua /tmp/bios.lua && flash -q /tmp/bios.lua && reboot
+	wget -f https://raw.githubusercontent.com/IgorTimofeev/MineOS/master/Installer/OpenOS.lua /tmp/installer.lua && /tmp/installer.lua
 
 You can paste it to console using middle mouse button or Insert key (by default). After a moment, a nice system installer will be shown. You will be prompted to select your preferred language, boot volume (can be formatted if needed), create a user profile and customize some settings