made the build system capable of self-hosting

build.cfg

@@ -0,0 +1,16 @@
+modules/debug/log.lua
+modules/base/header.lua
+modules/base/component.lua
+modules/lib/fs.lua
+modules/lib/buffer.lua
+modules/lib/io.lua
+modules/drivers/tty.lua
+modules/lib/print.lua
+modules/drivers/kbd.lua
+modules/drivers/net.lua
+modules/lib/readline.lua
+modules/applications/luash.lua
+modules/applications/genkernel.lua
+modules/setup.lua
+modules/base/footer.lua
+

genkernel.lua

@@ -0,0 +1,3 @@
+#!/usr/bin/env lua
+require "modules/applications/genkernel"
+print(genkernel(...))

genkernel.sh

@@ -1,4 +1,2 @@
 #!/bin/bash
-echo "_OSVERSION=\"PsychOS $(git rev-parse HEAD | head -c 8)\""
-echo "_BD=\"$(date '+%Y/%m/%d %H:%M %z')\""
-cat modules/debug/log.lua modules/base/header.lua modules/base/component.lua modules/lib/fs.lua modules/lib/buffer.lua modules/lib/io.lua modules/drivers/tty.lua modules/lib/print.lua modules/drivers/kbd.lua modules/drivers/net.lua modules/lib/readline.lua modules/applications/luash.lua modules/setup.lua modules/base/footer.lua
+./genkernel.lua build.cfg "$(git rev-parse --short HEAD)" > kernel.lua

modules/applications/genkernel.lua

@@ -0,0 +1,17 @@
+function genkernel(modlistf,kname)
+ local nk,f = "",io.open(modlistf,"rb")
+ nk=nk.."_OSVERSION=\"PsychOS "..(kname or "unknown").."\"\n"
+ nk=nk.."_BD=\""..os.date("%Y/%m/%d %H:%M %z").."\"\n"
+ local c=f:read("*a")
+ f:close()
+ n=1
+ for line in c:gmatch("[^\r\n]+") do
+  n=n+1
+  f=io.open(line,"rb")
+  if f then
+   nk=nk..f:read("*a")
+   f:close()
+  end
+ end
+ return nk
+end