mirror of https://github.com/20kdc/OC-KittenOS.git
79 lines
2.6 KiB
Lua
79 lines
2.6 KiB
Lua
-- This is released into the public domain.
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-- No warranty is provided, implied or otherwise.
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-- KittenOS NEO Installer Generator --
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local args = {...}
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local cid = args[1]
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local tarName = args[2]
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local algorithmsInReverseOrder = {}
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for i = 3, #args do
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table.insert(algorithmsInReverseOrder, 1, args[i])
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end
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local u = require("libs.frw")
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local instSize = 0
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local function put(data)
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io.write(data)
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instSize = instSize + #data
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end
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-- Installer Lexcrunch Context --
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local lexCrunch = require("libs.lexcrunch")()
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-- Installer Core --
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-- installerFinalized:
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-- Stuff that's already finished and put at the end of RISM. Prepend to this.
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-- installerPayload / installerProgramLength:
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-- The next-outer chunk that hasn't been written to the end of RISM
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-- as the compression scheme (if one) has not been applied yet.
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-- Really, installerProgramLength is only necessary because of the innermost chunk,
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-- as that chunk has the TAR; additional data that's part of the same effective compression block,
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-- but requires the program length to avoid it.
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local installerPayload
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local installerProgramLength
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local installerFinalized = ""
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do
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local tarData = u.read(tarName)
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local tarSectors = math.floor(#tarData / 512)
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local installerCore = lexCrunch.process(u.read("instcore.lua"), {["$$SECTORS"] = tostring(tarSectors)})
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installerPayload = installerCore .. tarData
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installerProgramLength = #installerCore
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end
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-- Installer Compression --
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for _, v in ipairs(algorithmsInReverseOrder) do
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io.stderr:write("compressing (" .. v .. ")\n")
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local algImpl = require(v .. ".compress")
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local algEngine, algData = algImpl(installerPayload, lexCrunch)
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io.stderr:write("result: " .. #installerPayload .. " -> " .. #algData .. "\n")
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-- prepend the program length of the last section
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algEngine = lexCrunch.process("$iBlockingLen = " .. installerProgramLength .. " " .. algEngine, {})
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-- commit
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installerPayload = algEngine
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installerProgramLength = #installerPayload
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installerFinalized = algData .. installerFinalized
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end
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-- Installer Final --
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-- This is a special case, so the program length/payload/etc. business has to be repeated.
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put("--" .. cid .. "\n")
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put("--This is released into the public domain. No warranty is provided, implied or otherwise.\n")
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put(lexCrunch.process(u.read("insthead.lua"), {["$$CORESIZE"] = tostring(installerProgramLength)}))
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local RISM = installerPayload .. installerFinalized
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RISM = RISM:gsub("\xFE", "\xFE\xFE")
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RISM = RISM:gsub("]]", "]\xFE]")
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RISM = "\x00" .. RISM
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put("--[[" .. RISM .. "]]")
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-- Dumping debug info --
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local dbg = io.open("iSymTab", "wb")
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lexCrunch.dump(dbg)
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dbg:close()
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