OS build now includes version information.

kernel/kernel.nim

@@ -4,6 +4,8 @@
 
 import tty, gdt, interrupts, serial
 
+const version {.strdefine.} = "UNKNOWN"
+
 type
   MemoryPointer{.unchecked.} = ptr array[0, char]
 
@@ -20,12 +22,18 @@ proc memset*(dest: ByteAddress, value: char, count: int){.exportc.} =
 
 proc kernelMain() {.exportc: "kernel_main"}=
   serial.init()
+  serial.write("Version:")
+  serial.write(version)
+  serial.write("\L")
   serial.write("Booting OS\L")
   gdt.gdtInstall()
   serial.write("GDT installed\L")
   interrupts.idtInstall()
   serial.write("IDT installed\L")
   terminalInitialize()
+  terminalWrite("Version:")
+  terminalWrite(version)
+  terminalWrite("\L")
   terminalWrite("Hello World!\L")
   terminalWrite("MAX_INT:")
   terminalWrite(high(int))

nakefile.nim

@@ -1,8 +1,9 @@
 import nake
-import os
+import os, osproc, strutils
 
-const
-  standardOptions = """--skipCfg kernel.nim"""
+let
+  standardOptions = """--skipCfg -d:version:"""" & execProcess("git rev-parse --abbrev-ref HEAD").strip() & 
+    "|" & execProcess("git rev-parse HEAD").strip() & """" kernel.nim"""
   outputFile = "myos.bin"
 
 task "clean", "Removes build files.":