#!/usr/bin/env perl
use strict;
use warnings;
use FindBin;
use Cwd 'getcwd';
use File::Path 'rmtree';

my ($cc,$cflags,$asm,$ld,$ldflags,$libgcc,$cmake,$kernel_cflags,$kernel_ld_flags,$kernel_ld_command, $initcode_cflags, $initcode_ld_command,$cbcmdir);

my $curdir = getcwd;

if (@ARGV) {
  if ($ARGV[0] =~ /--del/) {
    my @current_dir_file = glob "*";
    map { print "$_\n";} @current_dir_file;
    print "delete all files? > [y/n]\n";
    my $ans = <STDIN>;
    if ($ans =~ /y/) {
      print "delete ...\n";
      map { rmtree $_ } @current_dir_file;
    }
    shift;
  } else {
     if ($ARGV[0] =~ /--llvm/) {
         shift;
         $cbcmdir = $ARGV[0];
         shift;
     }
  }
}

$cmake = 'cmake';
my @cmake_arg = ();
my $xv6_src_dir = $FindBin::Bin;
$xv6_src_dir =~  s|(.*)/gearsTools(.*)|$1|;

my $objcopy;
if ($^O =~ /darwin/){
    my $armdir = "/usr/local/Cellar/arm-none-eabi-gcc/9-2019-q4-major";
    push(@cmake_arg,
      "-DCBC_AR=$armdir/bin/arm-none-eabi-ar",
      "-DCBC_RANLIB=$armdir/bin/arm-none-eabi-ranlib",
       );
    $objcopy = "$armdir/bin/arm-none-eabi-objcopy";
    # my $cbcmdir = "/usr/local/Cellar/cbc/llvm10";
    if (! defined $cbcmdir) {
        $cbcmdir = `brew info --formula cbc | grep llvm`;
        chop $cbcmdir;
        $cbcmdir =~ s/ .*//;
    }
    if (! -d $cbcmdir) {
        die "cant' find cbclangdir $cbcmdir";
    }
    $cc     = "$cbcmdir/bin/clang";
    $asm    = $cc;
    $cflags = qq| --target=armv6-linux-gnueabihf -I$xv6_src_dir/../cbclang/arm    -B$armdir/bin/arm-none-eabi-
             -DCBCXV6=1 -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall  -g -O0|;
    $ld     = "$armdir/bin/arm-none-eabi-ld";
    chomp($libgcc = `$cc --target=armv6-linux-gnueabihf --print-libgcc-file-name`);
    # $cmake  .= 3;
    $ldflags = " -L. -T kernel-cmake.ld";
    $kernel_cflags   = '-march=armv6 -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -Werror -g -O0 -iquote ../   -c';
    $kernel_ld_flags =  " -L. -N -e main -Ttext 0 <OBJECTS> -o <TARGET> <LINK_LIBRARIES>  -L ../ $armdir//gcc/lib/gcc/arm-none-eabi/9.2.1/libgcc.a";
    $kernel_ld_command = "$ld $kernel_ld_flags";
    $initcode_cflags = '-march=armv6   -nostdinc  -c';
    $initcode_ld_command = "$ld -L.  -N -e start -Ttext 0 <OBJECTS> -o <TARGET> <LINK_LIBRARIES>";

    $cflags =~ s/\n//g;

} else {
    $objcopy = "arm-none-eabi-objcopy";
    $cc     = '/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-gcc';
    $asm    = $cc;
    $cflags = qq|-B/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-  
             -DCBCXV6=1 -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall  -g -O0|;
    $ld     = '/mnt/dalmore-home/one/src/armgcc/cross/bin/arm-none-eabi-ld';
    chomp($libgcc = `$cc --print-libgcc-file-name`);
    $cmake  .= 3;
    $ldflags = " -L. -T kernel-cmake.ld";
    $kernel_cflags   = '-march=armv6 -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -Werror -g -O0 -iquote ../   -c';
    # -DX_CMAKE_C_LINK_EXECUTABLE=\"$ld $ldflags  -o kernel.elf <OBJECTS> $libgcc   -b binary initcode usr/fs.img\"
    $kernel_ld_flags =  ' -L. -N -e main -Ttext 0 <OBJECTS> -o <TARGET> <LINK_LIBRARIES>  -L ../ /mnt/dalmore-home/one/src/gcc-arm-none-eabi-6-2017-q2-update/bin/../lib/gcc/arm-none-eabi/6.3.1/libgcc.a';
    $kernel_ld_command = "$ld $kernel_ld_flags";
    $initcode_cflags = '-march=armv6   -nostdinc  -c';
    $initcode_ld_command = "$ld -L.  -N -e start -Ttext 0 <OBJECTS> -o <TARGET> <LINK_LIBRARIES>";

    $cflags =~ s/\n//g;
}

push(@cmake_arg,
   "-DCBC_COM=$cc",
   "-DPMAKE_ARGS=\"$cflags\"",
   # "-DCBC_ASM_COMPILER=$asm",
  "-DX_CMAKE_LINKER=$ld",
  "-DX_CMAKE_C_LINK_EXECUTABLE=\"$ld $ldflags  -o kernel.elf <OBJECTS> $libgcc   -b binary initcode fs.img\"",
  "-DKERNEL_LINK_EXECUTABLE=\"$kernel_ld_command\"",
  "-DCMAKE_INSTALL_RPATH_USE_LINK_PATH=TRUE",
  "-DINITOCDE_CFLAGS=\"$initcode_cflags\"",
  "-DINITOCDE_LINK_EXECUTABLE=\"$initcode_ld_command\"",
  "-S $xv6_src_dir",
  "-DXV6_OBJCOPY=\"$objcopy\"",
  $curdir);

unshift(@cmake_arg, $cmake);

create_link_script();
print_exec_system(@cmake_arg);

system("make");
#system("sh","link.sh");

sub create_link_script {
  my @link_script;
  while (my $line = <DATA>){
    $line =~ s/LD/$ld/;
    $line =~ s/LIBGCC/$libgcc/;
    push @link_script,$line;
  }
  if ($^O =~ /darwin/){
    for (@link_script){
       s/CMakeFiles/build/;
       s|kernel\.dir/||;
    }
  }
  open my $fh, '>', 'link.sh';
  print $fh "@link_script";
}

sub print_exec_system {
  my @query = @_;
  print(join(' ',@query), "\n");
  system(join(' ',@query));
}



__DATA__
cp  initcode ./CMakeFiles/kernel.dir/initcode 
cp  fs.img ./CMakeFiles/kernel.dir/fs.img

LD \
-L. \
-T \
kernel-cmake.ld \
-o \
kernel.elf \
 \
CMakeFiles/kernel.dir/lib/string.c.o \
CMakeFiles/kernel.dir/arm.c.o \
CMakeFiles/kernel.dir/asm.S.o \
CMakeFiles/kernel.dir/bio.c.o \
CMakeFiles/kernel.dir/buddy.c.o \
CMakeFiles/kernel.dir/c/console.c.o \
CMakeFiles/kernel.dir/exec.c.o \
CMakeFiles/kernel.dir/c/file.c.o \
CMakeFiles/kernel.dir/fs.c.o \
CMakeFiles/kernel.dir/log.c.o \
CMakeFiles/kernel.dir/main.c.o \
CMakeFiles/kernel.dir/memide.c.o \
CMakeFiles/kernel.dir/c/pipe.c.o \
CMakeFiles/kernel.dir/c/proc.c.o \
CMakeFiles/kernel.dir/c/spinlock.c.o \
CMakeFiles/kernel.dir/start.c.o \
CMakeFiles/kernel.dir/swtch.S.o \
CMakeFiles/kernel.dir/c/syscall.c.o \
CMakeFiles/kernel.dir/c/sysfile.c.o \
CMakeFiles/kernel.dir/sysproc.c.o \
CMakeFiles/kernel.dir/trap_asm.S.o \
CMakeFiles/kernel.dir/trap.c.o \
CMakeFiles/kernel.dir/vm.c.o \
CMakeFiles/kernel.dir/device/picirq.c.o \
CMakeFiles/kernel.dir/device/timer.c.o \
CMakeFiles/kernel.dir/device/uart.c.o \
CMakeFiles/kernel.dir/entry.S.o \
CMakeFiles/kernel.dir/c/kernel-context.c.o \
 \
 \
LIBGCC \
 \
-b \
binary \
initcode \
fs.img