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builder.py
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builder.py
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#!/usr/bin/env python3
import sys, os, time
from os import listdir
from os.path import isfile, join
class bcolors:
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
def print_status(text):
print(bcolors.BOLD + bcolors.UNDERLINE + text + bcolors.ENDC + bcolors.ENDC)
def execute(cmd):
if '-v' in sys.argv:
print(bcolors.OKBLUE + cmd + bcolors.ENDC)
code = os.system(cmd)
if code != 0:
exit()
build_start = time.time()
if '-h' in sys.argv:
print('Additional arguments:\n -h display this message\n -v print every command executed\n -d replace -Os GCC option with -Og')
exit()
config_file = 'nbuild'
image_file = 'build/neutron.img'
iso_file = 'build/neutron.iso'
config_file_obj = open(config_file, 'r')
config_contents = config_file_obj.read()
config_file_obj.close()
c_files = list()
fs_files = list()
after_build = ''
if not os.path.exists('build'):
os.mkdir('build')
config_section = ''
config_lines = config_contents.split('\n')
for line_no in range(len(config_lines)):
line = config_lines[line_no]
if line != "":
if not line.startswith('#'):
if line.startswith('.'):
config_section = line[1:]
if not config_section in ['c', 'after-build']:
print('Error: ' + config_file + ':' + str(line_no + 1) + ': invalid section "' + config_section + '"')
sys.exit()
else:
if config_section == 'c':
c_files.append(line)
elif config_section == 'after-build':
after_build = after_build + line + '\n'
else:
print('Error: ' + config_file + ':' + str(line_no + 1) + ': data in invalid section "' + config_section + '"')
sys.exit()
print_status('Cleaning the build directory')
execute('rm -rf build/*')
c_obj = list()
print_status('Compiling C sources')
for path in c_files:
path_obj = 'build/' + os.path.basename(path) + '.o'
c_obj.append(path_obj)
print(' Compiling: ' + path)
execute('x86_64-w64-mingw32-gcc -g2 -fno-pie -Wall -ffreestanding -mcmodel=large -mno-red-zone -m64 ' + ('-Og' if '-d' in sys.argv else '-Os') +
' -fstack-protector -Ignu-efi/inc -Ignu-efi/lib -Ignu-efi/inc/x86_64 -Ignu-efi/inc/protocol -nostdlib -Wno-varargs -c -o ' + path_obj + ' ' + path)
print_status('Linking')
execute('x86_64-w64-mingw32-gcc -g2 -mcmodel=large -mno-red-zone -m64 -nostdlib -shared -Wl,-dll,--subsystem,10,--image-base,0xFFFF800000000000,-e,efi_main -o build/BOOTX64.EFI ' + ' '.join(c_obj))
image_size_sectors_default = 4 * 1024 * 2
image_size_sectors = 2880
print_status('Building INITRD')
initrd_img = bytearray()
initrd_files = [f for f in listdir('initrd') if isfile(join('initrd', f))]
initrd_size = 64
for f in initrd_files:
initrd_size = initrd_size + 64 + os.path.getsize(join('initrd', f)) #64 bytes per file entry
print("INITRD size: " + str(initrd_size) + " bytes (" + str(initrd_size // 1024) + " KiB, " + str(len(initrd_files)) + " files)")
image_size_sectors = max(image_size_sectors_default, (initrd_size // 512) + 1)
initrd_img = bytearray(initrd_size)
initrd_file_pos = (len(initrd_files) + 1) * 64
initrd_file_list_pos = 0
for f in initrd_files:
with open(join('initrd', f), 'rb') as file:
f_data = file.read()
size_bytes = os.path.getsize(join('initrd', f)).to_bytes(4, byteorder="little")
pos_bytes = initrd_file_pos.to_bytes(4, byteorder="little")
initrd_img[initrd_file_list_pos + 0] = pos_bytes[0]
initrd_img[initrd_file_list_pos + 1] = pos_bytes[1]
initrd_img[initrd_file_list_pos + 2] = pos_bytes[2]
initrd_img[initrd_file_list_pos + 3] = pos_bytes[3]
initrd_file_list_pos = initrd_file_list_pos + 4
initrd_img[initrd_file_list_pos + 0] = size_bytes[0]
initrd_img[initrd_file_list_pos + 1] = size_bytes[1]
initrd_img[initrd_file_list_pos + 2] = size_bytes[2]
initrd_img[initrd_file_list_pos + 3] = size_bytes[3]
initrd_file_list_pos = initrd_file_list_pos + 4
for c in f:
initrd_img[initrd_file_list_pos] = ord(c)
initrd_file_list_pos = initrd_file_list_pos + 1
initrd_img[initrd_file_list_pos] = 0
initrd_file_list_pos = initrd_file_list_pos + 56 - len(f)
for b in f_data:
initrd_img[initrd_file_pos] = b
initrd_file_pos = initrd_file_pos + 1
with open('build/initrd', 'wb') as initrd_file:
initrd_file.write(initrd_img)
print_status('Bulding system image')
print(f' Image size: {image_size_sectors / 2048} MiB')
print(' Creating image file')
execute('dd if=/dev/zero of=build/neutron.img count=' + str(image_size_sectors) + ' > /dev/null 2>&1')
print(' Creating filesystem')
execute('mformat -i build/neutron.img -T ' + str(image_size_sectors))
execute('mmd -i build/neutron.img ::/EFI')
execute('mmd -i build/neutron.img ::/EFI/BOOT')
execute('mmd -i build/neutron.img ::/EFI/nOS')
print(' Moving EFI executable')
execute('mcopy -i build/neutron.img build/BOOTX64.EFI ::/EFI/BOOT')
print(' Moving INITRD')
execute('mcopy -i build/neutron.img build/initrd ::/EFI/nOS/initrd')
print(' Making ISO')
execute(f'dd if={image_file} of={iso_file} > /dev/null 2>&1')
build_end = time.time()
build_took = build_end - build_start
print_status(f'Build done, took {int(build_took * 1000)} ms')
if after_build != '':
print_status('Exectuting after-build commands')
execute(after_build)