def main():
common.check_filesystem()
# Basic sanity checks of files and paths that absolutely need to exist.
message.sub_info('Doing sanity checks')
lsb_file = misc.join_paths(config.FILESYSTEM_DIR, 'etc/lsb-release')
if not os.path.isfile(lsb_file):
raise(message.exception(lsb_file + ' does not exist'))
isolinux_dir = misc.join_paths(config.ISO_DIR, 'isolinux')
if not os.path.isdir(isolinux_dir):
raise(message.exception(isolinux_dir + ' does not exist'))
if misc.search_file('999:999', misc.join_paths(config.FILESYSTEM_DIR, 'etc/passwd')):
raise(message.exception('User with UID 999 exists, this means automatic login will fail'))
elif misc.search_file('999:999', misc.join_paths(config.FILESYSTEM_DIR, 'etc/group')):
raise(message.exception('Group with GID 999 exists, this means automatic login will fail'))
casper_dir = misc.join_paths(config.ISO_DIR, 'casper')
if not os.path.isdir(casper_dir):
message.sub_debug('Creating', casper_dir)
os.makedirs(casper_dir)
base_file = misc.join_paths(config.ISO_DIR, '.disk/base_installable')
if os.path.isfile(misc.join_paths(config.FILESYSTEM_DIR, 'usr/bin/ubiquity')):
if not os.path.isfile(base_file):
message.sub_debug('Creating', base_file)
misc.write_file(base_file, '')
elif os.path.isfile(base_file):
message.sub_debug('Removing', base_file)
os.unlink(base_file)
# Acquire distribution information from the FileSystem
message.sub_info('Gathering information')
arch = misc.chroot_exec(('dpkg', '--print-architecture'), prepare=False, \
mount=False, output=True)
distrib = common.get_value(config.FILESYSTEM_DIR + '/etc/lsb-release', \
'DISTRIB_ID=')
release = common.get_value(config.FILESYSTEM_DIR + '/etc/lsb-release', \
'DISTRIB_RELEASE=')
message.sub_debug('Architecture', arch)
message.sub_debug('Distribution (DISTRIB_ID)', distrib)
message.sub_debug('Release (DISTRIB_RELEASE)', release)
# Remove files, by name, that we know we must repopulate if they exist.
message.sub_info('Cleaning up')
cleanup_files = ['casper/filesystem.squashfs', 'casper/initrd.lz', \
'casper/vmlinuz', 'casper/vmlinuz.efi', 'casper/filesystem.manifest', \
'casper/filesystem.size']
cleanup_files.extend(glob.glob('.disk/casper-uuid-*'))
for sfile in cleanup_files:
full_file = misc.join_paths(config.ISO_DIR, sfile)
if os.path.exists(full_file):
message.sub_debug('Removing', full_file)
os.unlink(full_file)
# Define the checksum files, and the ISO filename.
md5sum_iso_file = misc.join_paths(config.WORK_DIR, 'md5sum')
sha1sum_iso_file = misc.join_paths(config.WORK_DIR, 'sha1sum')
sha256sum_iso_file = misc.join_paths(config.WORK_DIR, 'sha256sum')
iso_file = '%s/%s-%s-%s.iso' % (config.WORK_DIR, distrib, arch, release)
if os.path.exists(iso_file):
message.sub_debug('Removing', iso_file)
os.unlink(iso_file)
if os.path.exists(md5sum_iso_file):
message.sub_debug('Removing', md5sum_iso_file)
os.unlink(md5sum_iso_file)
if os.path.exists(sha1sum_iso_file):
message.sub_debug('Removing', sha1sum_iso_file)
os.unlink(sha1sum_iso_file)
if os.path.exists(sha256sum_iso_file):
message.sub_debug('Removing', sha256sum_iso_file)
os.unlink(sha256sum_iso_file)
# Detect files needed for booting, the kernel, initramfs, xen and anything else.
detect_boot()
if not vmlinuz:
message.sub_info('Re-installing kernel')
misc.chroot_exec(('apt-get', 'purge', '--yes', 'linux-image*', '-q'))
misc.chroot_exec(('apt-get', 'install', '--yes', \
'linux-image-generic', '-q'))
misc.chroot_exec(('apt-get', 'clean'))
else:
message.sub_info('Updating initramfs')
misc.chroot_exec(('update-initramfs', '-k', 'all', '-t', '-u'))
detect_boot()
if not initrd or not vmlinuz:
raise(message.exception('Missing boot file (initrd or vmlinuz)'))
else:
message.sub_info('Copying boot files')
message.sub_debug('Initrd', initrd)
message.sub_debug('Vmlinuz', vmlinuz)
misc.copy_file(initrd, misc.join_paths(config.ISO_DIR, 'casper/initrd.lz'))
# FIXME: extend to support grub
efi_boot_entry = False
isolinux_dir = config.ISO_DIR + '/isolinux'
if os.path.isdir(isolinux_dir):
for sfile in os.listdir(isolinux_dir):
if sfile.endswith('.cfg') and misc.search_file('vmlinuz.efi', isolinux_dir + '/' + sfile):
message.sub_debug('Found EFI entry in isolinux conf', sfile)
efi_boot_entry = True
if os.path.isdir(misc.join_paths(config.ISO_DIR, 'efi/boot')) or \
efi_boot_entry:
message.sub_debug('Copying EFI vmlinuz')
misc.copy_file(vmlinuz, misc.join_paths(config.ISO_DIR, \
'casper/vmlinuz.efi'))
os.link(misc.join_paths(config.ISO_DIR, \
'casper/vmlinuz.efi'), misc.join_paths(config.ISO_DIR, \
'casper/vmlinuz'))
# EFI Kernels are still loadable by grub, modern ISOs lack a bare vmlinuz.
# mkisofs/genisoimage -cache-inodes reuses hard linked inodes.
else:
misc.copy_file(vmlinuz, misc.join_paths(config.ISO_DIR, 'casper/vmlinuz'))
# We only need to copy the bare kernel if we're not using EFI at all.
# Copy optional boot-enablement packages onto the ISO, if found.
if mt86plus:
message.sub_debug('Memtest86+ kernel', mt86plus)
misc.copy_file(mt86plus, misc.join_paths(config.ISO_DIR, 'install/mt86plus'))
if xen_kernel:
message.sub_debug('Xen kernel', xen_kernel)
misc.copy_file(xen_kernel, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(xen_kernel)))
if xen_efi:
message.sub_debug('Xen EFI kernel', xen_efi)
misc.copy_file(xen_efi, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(xen_efi)))
if ipxe_kernel:
message.sub_debug('iPXE kernel', ipxe_kernel)
misc.copy_file(ipxe_kernel, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(ipxe_kernel)))
if ipxe_efi:
message.sub_debug('iPXE EFI kernel', ipxe_efi)
misc.copy_file(ipxe_efi, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(ipxe_efi)))
message.sub_info('Extracting casper UUID')
confdir = config.FILESYSTEM_DIR + '/conf'
if os.path.isdir(confdir):
shutil.rmtree(confdir)
os.makedirs(confdir)
try:
misc.chroot_exec('zcat ' + initrd.replace(config.FILESYSTEM_DIR, '') + ' | cpio --quiet -id conf/uuid.conf', \
shell=True, cwd=config.FILESYSTEM_DIR)
kernel = re.search('initrd.img-*.*.*-*-(.*)', initrd).group(1)
message.sub_debug('Kernel', kernel)
misc.copy_file(confdir + '/uuid.conf', misc.join_paths(config.ISO_DIR, \
'.disk/casper-uuid-' + kernel))
finally:
shutil.rmtree(confdir)
# Define some default compression parameters, including a 1MB blocksize for all compressors.
compression_parameters = ('-b', '1048576', '-comp', config.COMPRESSION)
if config.COMPRESSION == 'xz': # Append additional compression parameters for xz.
# Using the branch-call-jump filter provides a compression boost with executable code.
# This can save a hundred megabytes easily, on an 800MB ISO. The dictionary size must
# match the block size, and it's advisable to use larger block sizes, like 1MB or 4MB.
compression_parameters += ('-Xbcj', 'x86', '-Xdict-size', '100%')
message.sub_info('SquashFS Compression parameters', compression_parameters)
# Create the compressed filesystem
message.sub_info('Creating SquashFS compressed filesystem')
make_squash_fs = ('mksquashfs', config.FILESYSTEM_DIR, \
misc.join_paths(config.ISO_DIR, 'casper/filesystem.squashfs'), \
'-wildcards', '-no-recovery', '-noappend', \
'-ef', os.path.join(sys.prefix, 'share/customizer/exclude.list'))
misc.system_command(make_squash_fs + compression_parameters)
message.sub_info('Checking SquashFS filesystem size')
sfs_size = os.path.getsize(misc.join_paths(config.ISO_DIR, \
'casper/filesystem.squashfs'))
message.sub_debug('SquashFS filesystem size', sfs_size)
if sfs_size > 4000000000:
raise(message.exception('The SquashFS filesystem size is greater than 4GB'))
message.sub_info('Creating filesystem.size')
fs_size = 0
for root, subdirs, files in os.walk(config.FILESYSTEM_DIR):
for sfile in files:
sfull = os.path.join(root, sfile)
if os.path.islink(sfull):
continue
# FIXME: respect ignored files from exclude.list
fs_size += os.path.getsize(sfull)
message.sub_debug('Root filesystem size', fs_size)
misc.write_file(misc.join_paths(config.ISO_DIR, \
'casper/filesystem.size'), str(fs_size))
message.sub_info('Creating filesystem.manifest')
lpackages = misc.chroot_exec(('dpkg-query', '-W', \
'--showformat=${Package} ${Version}\\n'), prepare=False, mount=False, \
output=True)
message.sub_debug('Packages', lpackages)
misc.write_file(misc.join_paths(config.ISO_DIR, \
'casper/filesystem.manifest'), lpackages)
# FIXME: do some kung-fu to check if packages are installed
# and remove them from filesystem.manifest-remove if they are not
# Creating a md5sum.txt file fixes lubuntu's integrity check.
md5sums_file = misc.join_paths(config.ISO_DIR, 'md5sum.txt')
if os.path.isfile(md5sums_file):
message.sub_info('Creating md5sum.txt')
misc.write_file(md5sums_file, '')
for sfile in misc.list_files(config.ISO_DIR):
if sfile.endswith('md5sum.txt'):
continue
if sfile.endswith('SHA256SUMS'):
continue
message.sub_debug('MD5 Checksumming', sfile)
checksum = misc.generate_hash_for_file('md5', sfile)
misc.append_file(md5sums_file, checksum + ' .' + \
sfile.replace(config.ISO_DIR, '') +'\n')
# Creating a SHA256SUMS file fixes ubuntu-mini-remix's integrity check.
shasums_file = misc.join_paths(config.ISO_DIR, 'SHA256SUMS')
if os.path.isfile(shasums_file):
message.sub_info('Creating SHA256SUMS')
misc.write_file(shasums_file, '')
for sfile in misc.list_files(config.ISO_DIR):
if sfile.endswith('md5sum.txt'):
continue
if sfile.endswith('SHA256SUMS'):
continue
message.sub_debug('SHA256 Checksumming', sfile)
checksum = misc.generate_hash_for_file('sha256', sfile)
misc.append_file(shasums_file, checksum + ' .' + \
sfile.replace(config.ISO_DIR, '') +'\n')
# Create the ISO filesystem
message.sub_info('Creating ISO')
os.chdir(config.ISO_DIR)
misc.system_command(('xorriso', '-as', 'mkisofs', '-r', '-V', \
distrib + '-' + arch + '-' + release, '-b', 'isolinux/isolinux.bin', \
'-c', 'isolinux/boot.cat', '-J', '-l', '-no-emul-boot', \
'-boot-load-size', '4', '-boot-info-table', '-o', iso_file, \
'-cache-inodes', '-input-charset', 'utf-8', '.'))
message.sub_info('Creating ISO checksums')
md5checksum = misc.generate_hash_for_file('md5', iso_file)
message.sub_info('ISO md5 checksum', md5checksum)
misc.append_file(md5sum_iso_file, md5checksum + ' .' + \
iso_file.replace(config.WORK_DIR, '') +'\n')
sha1checksum = misc.generate_hash_for_file('sha1', iso_file)
message.sub_info('ISO sha1 checksum', sha1checksum)
misc.append_file(sha1sum_iso_file, sha1checksum + ' .' + \
iso_file.replace(config.WORK_DIR, '') +'\n')
sha256checksum = misc.generate_hash_for_file('sha256', iso_file)
message.sub_info('ISO sha256 checksum', sha256checksum)
misc.append_file(sha256sum_iso_file, sha256checksum + ' .' + \
iso_file.replace(config.WORK_DIR, '') +'\n')
message.sub_info('Successfuly created ISO image', iso_file)
def main():
common.check_filesystem()
# Basic sanity checks of files and paths that absolutely need to exist.
message.sub_info("Doing sanity checks")
lsb_file = misc.join_paths(config.FILESYSTEM_DIR, "etc/lsb-release")
if not os.path.isfile(lsb_file):
raise (message.exception(lsb_file + " does not exist"))
isolinux_dir = misc.join_paths(config.ISO_DIR, "isolinux")
if not os.path.isdir(isolinux_dir):
raise (message.exception(isolinux_dir + " does not exist"))
if misc.search_file("999:999", misc.join_paths(config.FILESYSTEM_DIR, "etc/passwd")):
raise (message.exception("User with UID 999 exists, this mean that automatic login will fail"))
elif misc.search_file("999:999", misc.join_paths(config.FILESYSTEM_DIR, "etc/group")):
raise (message.exception("Group with GID 999 exists, this mean that automatic login will fail"))
casper_dir = misc.join_paths(config.ISO_DIR, "casper")
if not os.path.isdir(casper_dir):
message.sub_debug("Creating", casper_dir)
os.makedirs(casper_dir)
base_file = misc.join_paths(config.ISO_DIR, ".disk/base_installable")
if os.path.isfile(misc.join_paths(config.FILESYSTEM_DIR, "usr/bin/ubiquity")):
if not os.path.isfile(base_file):
message.sub_debug("Creating", base_file)
misc.write_file(base_file, "")
elif os.path.isfile(base_file):
message.sub_debug("Removing", base_file)
os.unlink(base_file)
# Acquire distribution information from the FileSystem
message.sub_info("Gathering information")
arch = misc.chroot_exec(("dpkg", "--print-architecture"), prepare=False, mount=False, output=True)
distrib = common.get_value(config.FILESYSTEM_DIR + "/etc/lsb-release", "DISTRIB_ID=")
release = common.get_value(config.FILESYSTEM_DIR + "/etc/lsb-release", "DISTRIB_RELEASE=")
# It's really annoying to override the output filename other ways.
# If you actually try to change lsb-release, you end up breaking apt.
livecd_file = misc.join_paths(config.FILESYSTEM_DIR, "etc/livecd-release")
if os.path.isfile(livecd_file):
distrib = common.get_value(config.FILESYSTEM_DIR + "/etc/livecd-release", "DISTRIB_ID=")
release = common.get_value(config.FILESYSTEM_DIR + "/etc/livecd-release", "DISTRIB_RELEASE=")
message.sub_debug("Distribution and Release overriden by /etc/livecd-release")
# Just overwrite the variables if the file actually exists, it's cleaner.
message.sub_debug("Architecture", arch)
message.sub_debug("Distribution (DISTRIB_ID)", distrib)
message.sub_debug("Release (DISTRIB_RELEASE)", release)
# Remove files, by name, that we know we must repopulate if they exist.
message.sub_info("Cleaning up")
cleanup_files = [
"casper/filesystem.squashfs",
"casper/initrd.lz",
"casper/vmlinuz",
"casper/vmlinuz.efi",
"casper/filesystem.manifest",
"casper/filesystem.size",
]
cleanup_files.extend(glob.glob(".disk/casper-uuid-*"))
for sfile in cleanup_files:
full_file = misc.join_paths(config.ISO_DIR, sfile)
if os.path.exists(full_file):
message.sub_debug("Removing", full_file)
os.unlink(full_file)
# Define the checksum files, and the ISO filename.
md5sum_iso_file = misc.join_paths(config.WORK_DIR, "md5sum")
sha1sum_iso_file = misc.join_paths(config.WORK_DIR, "sha1sum")
sha256sum_iso_file = misc.join_paths(config.WORK_DIR, "sha256sum")
iso_file = "%s/%s-%s-%s.iso" % (config.WORK_DIR, distrib, arch, release)
if os.path.exists(iso_file):
message.sub_debug("Removing", iso_file)
os.unlink(iso_file)
if os.path.exists(md5sum_iso_file):
message.sub_debug("Removing", md5sum_iso_file)
os.unlink(md5sum_iso_file)
if os.path.exists(sha1sum_iso_file):
message.sub_debug("Removing", sha1sum_iso_file)
os.unlink(sha1sum_iso_file)
if os.path.exists(sha256sum_iso_file):
message.sub_debug("Removing", sha256sum_iso_file)
os.unlink(sha256sum_iso_file)
# Detect files needed for booting, the kernel, initramfs, xen and anything else.
detect_boot()
if not vmlinuz:
message.sub_info("Re-installing kernel")
misc.chroot_exec(("apt-get", "purge", "--yes", "linux-image*", "-q"))
misc.chroot_exec(("apt-get", "install", "--yes", "linux-signed-generic", "-q"))
misc.chroot_exec(("apt-get", "clean"))
else:
message.sub_info("Updating initramfs")
misc.chroot_exec(("update-initramfs", "-k", "all", "-t", "-u"))
detect_boot()
if not initrd or not vmlinuz:
raise (message.exception("Missing boot file (initrd or vmlinuz)"))
else:
message.sub_info("Copying boot files")
message.sub_debug("Initrd", initrd)
message.sub_debug("Vmlinuz", vmlinuz)
misc.copy_file(initrd, misc.join_paths(config.ISO_DIR, "casper/initrd.lz"))
# FIXME: extend to support grub
efi_boot_entry = False
isolinux_dir = config.ISO_DIR + "/isolinux"
if os.path.isdir(isolinux_dir):
for sfile in os.listdir(isolinux_dir):
if sfile.endswith(".cfg") and misc.search_file("vmlinuz.efi", isolinux_dir + "/" + sfile):
message.sub_debug("Found EFI entry in isolinux conf", sfile)
efi_boot_entry = True
if os.path.isdir(misc.join_paths(config.ISO_DIR, "efi/boot")) or efi_boot_entry:
message.sub_debug("Copying EFI vmlinuz")
misc.copy_file(vmlinuz, misc.join_paths(config.ISO_DIR, "casper/vmlinuz.efi"))
os.link(
misc.join_paths(config.ISO_DIR, "casper/vmlinuz.efi"), misc.join_paths(config.ISO_DIR, "casper/vmlinuz")
)
# EFI Kernels are still loadable by grub, modern ISOs lack a bare vmlinuz.
# mkisofs/genisoimage -cache-inodes reuses hard linked inodes.
else:
misc.copy_file(vmlinuz, misc.join_paths(config.ISO_DIR, "casper/vmlinuz"))
# We only need to copy the bare kernel if we're not using EFI at all.
# Copy optional boot-enablement packages onto the ISO, if found.
if mt86plus:
message.sub_debug("Memtest86+ kernel", mt86plus)
misc.copy_file(mt86plus, misc.join_paths(config.ISO_DIR, "install/mt86plus"))
if xen_kernel:
message.sub_debug("Xen kernel", xen_kernel)
misc.copy_file(xen_kernel, misc.join_paths(config.ISO_DIR, "casper/" + os.path.basename(xen_kernel)))
if xen_efi:
message.sub_debug("Xen EFI kernel", xen_efi)
misc.copy_file(xen_efi, misc.join_paths(config.ISO_DIR, "casper/" + os.path.basename(xen_efi)))
if ipxe_kernel:
message.sub_debug("iPXE kernel", ipxe_kernel)
misc.copy_file(ipxe_kernel, misc.join_paths(config.ISO_DIR, "casper/" + os.path.basename(ipxe_kernel)))
if ipxe_efi:
message.sub_debug("iPXE EFI kernel", ipxe_efi)
misc.copy_file(ipxe_efi, misc.join_paths(config.ISO_DIR, "casper/" + os.path.basename(ipxe_efi)))
message.sub_info("Extracting casper UUID")
confdir = config.FILESYSTEM_DIR + "/conf"
if os.path.isdir(confdir):
shutil.rmtree(confdir)
os.makedirs(confdir)
try:
misc.chroot_exec(
"zcat " + initrd.replace(config.FILESYSTEM_DIR, "") + " | cpio --quiet -id conf/uuid.conf",
shell=True,
cwd=config.FILESYSTEM_DIR,
)
kernel = re.search("initrd.img-*.*.*-*-(.*)", initrd).group(1)
message.sub_debug("Kernel", kernel)
misc.copy_file(confdir + "/uuid.conf", misc.join_paths(config.ISO_DIR, ".disk/casper-uuid-" + kernel))
finally:
shutil.rmtree(confdir)
# Define some default compression parameters, including a 1MB blocksize for all compressors.
compression_parameters = ("-b", "1048576", "-comp", config.COMPRESSION)
if config.COMPRESSION == "xz": # Append additional compression parameters for xz.
# Using the branch-call-jump filter provides a compression boost with executable code.
# This can save a hundred megabytes easily, on an 800MB ISO. The dictionary size must
# match the block size, and it's advisable to use larger block sizes, like 1MB or 4MB.
compression_parameters += ("-Xbcj", "x86", "-Xdict-size", "100%")
message.sub_info("SquashFS Compression parameters", compression_parameters)
# Create the compressed filesystem
message.sub_info("Creating SquashFS Compressed Filesystem")
make_squash_fs = (
"mksquashfs",
config.FILESYSTEM_DIR,
misc.join_paths(config.ISO_DIR, "casper/filesystem.squashfs"),
"-wildcards",
"-no-recovery",
"-noappend",
"-ef",
os.path.join(sys.prefix, "share/customizer/exclude.list"),
)
misc.system_command(make_squash_fs + compression_parameters)
message.sub_info("Checking SquashFS filesystem size")
sfs_size = os.path.getsize(misc.join_paths(config.ISO_DIR, "casper/filesystem.squashfs"))
message.sub_debug("SquashFS filesystem size", sfs_size)
if sfs_size > 4000000000:
raise (message.exception("The SquashFS filesystem size is greater than 4GB"))
message.sub_info("Creating filesystem.size")
fs_size = 0
for root, subdirs, files in os.walk(config.FILESYSTEM_DIR):
for sfile in files:
sfull = os.path.join(root, sfile)
if os.path.islink(sfull):
continue
# FIXME: respect ignored files from exclude.list
fs_size += os.path.getsize(sfull)
message.sub_debug("Root filesystem size", fs_size)
misc.write_file(misc.join_paths(config.ISO_DIR, "casper/filesystem.size"), str(fs_size))
message.sub_info("Creating filesystem.manifest")
lpackages = misc.chroot_exec(
("dpkg-query", "-W", "--showformat=${Package} ${Version}\\n"), prepare=False, mount=False, output=True
)
message.sub_debug("Packages", lpackages)
misc.write_file(misc.join_paths(config.ISO_DIR, "casper/filesystem.manifest"), lpackages)
# FIXME: do some kung-fu to check if packages are installed
# and remove them from filesystem.manifest-remove if they are not
# Creating a md5sum.txt file fixes lubuntu's integrity check.
md5sums_file = misc.join_paths(config.ISO_DIR, "md5sum.txt")
if os.path.isfile(md5sums_file):
message.sub_info("Creating md5sum.txt")
misc.write_file(md5sums_file, "")
for sfile in misc.list_files(config.ISO_DIR):
if sfile.endswith("md5sum.txt"):
continue
if sfile.endswith("SHA256SUMS"):
continue
message.sub_debug("MD5 Checksumming", sfile)
checksum = misc.generate_hash_for_file("md5", sfile)
misc.append_file(md5sums_file, checksum + " ." + sfile.replace(config.ISO_DIR, "") + "\n")
# Creating a SHA256SUMS file fixes ubuntu-mini-remix's integrity check.
shasums_file = misc.join_paths(config.ISO_DIR, "SHA256SUMS")
if os.path.isfile(shasums_file):
message.sub_info("Creating SHA256SUMS")
misc.write_file(shasums_file, "")
for sfile in misc.list_files(config.ISO_DIR):
if sfile.endswith("md5sum.txt"):
continue
if sfile.endswith("SHA256SUMS"):
continue
message.sub_debug("SHA256 Checksumming", sfile)
checksum = misc.generate_hash_for_file("sha256", sfile)
misc.append_file(shasums_file, checksum + " ." + sfile.replace(config.ISO_DIR, "") + "\n")
# Create the ISO filesystem
message.sub_info("Creating ISO")
os.chdir(config.ISO_DIR)
misc.system_command(
(
"xorriso",
"-as",
"mkisofs",
"-r",
"-V",
distrib + "-" + arch + "-" + release,
"-b",
"isolinux/isolinux.bin",
"-c",
"isolinux/boot.cat",
"-J",
"-l",
"-no-emul-boot",
"-boot-load-size",
"4",
"-boot-info-table",
"-o",
iso_file,
"-cache-inodes",
"-input-charset",
"utf-8",
".",
)
)
message.sub_info("Creating ISO checksums")
md5checksum = misc.generate_hash_for_file("md5", iso_file)
message.sub_info("ISO md5 checksum", md5checksum)
misc.append_file(md5sum_iso_file, md5checksum + " ." + iso_file.replace(config.WORK_DIR, "") + "\n")
sha1checksum = misc.generate_hash_for_file("sha1", iso_file)
message.sub_info("ISO sha1 checksum", sha1checksum)
misc.append_file(sha1sum_iso_file, sha1checksum + " ." + iso_file.replace(config.WORK_DIR, "") + "\n")
sha256checksum = misc.generate_hash_for_file("sha256", iso_file)
message.sub_info("ISO sha256 checksum", sha256checksum)
misc.append_file(sha256sum_iso_file, sha256checksum + " ." + iso_file.replace(config.WORK_DIR, "") + "\n")
message.sub_info("Successfuly created ISO image", iso_file)
def main():
common.check_filesystem()
# Basic sanity checks of files and paths that absolutely need to exist.
message.sub_info('Doing sanity checks')
lsb_file = misc.join_paths(config.FILESYSTEM_DIR, 'etc/lsb-release')
if not os.path.isfile(lsb_file):
raise(message.exception(lsb_file + ' does not exist'))
isolinux_dir = misc.join_paths(config.ISO_DIR, 'isolinux')
if not os.path.isdir(isolinux_dir):
raise(message.exception(isolinux_dir + ' does not exist'))
if misc.search_file('999:999', misc.join_paths(config.FILESYSTEM_DIR, 'etc/passwd')):
raise(message.exception('User with UID 999 exists, this means automatic login will fail'))
elif misc.search_file('999:999', misc.join_paths(config.FILESYSTEM_DIR, 'etc/group')):
raise(message.exception('Group with GID 999 exists, this means automatic login will fail'))
casper_dir = misc.join_paths(config.ISO_DIR, 'casper')
if not os.path.isdir(casper_dir):
message.sub_debug('Creating', casper_dir)
os.makedirs(casper_dir)
base_file = misc.join_paths(config.ISO_DIR, '.disk/base_installable')
if os.path.isfile(misc.join_paths(config.FILESYSTEM_DIR, 'usr/bin/ubiquity')):
if not os.path.isfile(base_file):
message.sub_debug('Creating', base_file)
misc.write_file(base_file, '')
elif os.path.isfile(base_file):
message.sub_debug('Removing', base_file)
os.unlink(base_file)
# Acquire distribution information from the FileSystem
message.sub_info('Gathering information')
arch = misc.chroot_exec(('dpkg', '--print-architecture'), prepare=False, \
mount=False, output=True)
distrib = common.get_value(config.FILESYSTEM_DIR + '/etc/lsb-release', \
'DISTRIB_ID=')
release = common.get_value(config.FILESYSTEM_DIR + '/etc/lsb-release', \
'DISTRIB_RELEASE=')
if isinstance(arch, bytes): # For some reason this is of type 'bytes'.
if int(sys.version_info[0]) >= 3: # If we're running under python3
arch = str(arch, 'utf-8')
else: # Otherwise just cast it to a str without the 'utf-8' option.
arch = str(arch)
# It's really annoying to override the output filename other ways.
# If you actually try to change lsb-release, you end up breaking apt.
livecd_file = misc.join_paths(config.FILESYSTEM_DIR, 'etc/livecd-release')
if os.path.isfile(livecd_file):
distrib = common.get_value(config.FILESYSTEM_DIR + '/etc/livecd-release', \
'DISTRIB_ID=')
release = common.get_value(config.FILESYSTEM_DIR + '/etc/livecd-release', \
'DISTRIB_RELEASE=')
message.sub_debug('Distribution and Release overriden by /etc/livecd-release')
# Just overwrite the variables if the file actually exists, it's cleaner.
message.sub_debug('Architecture', arch)
message.sub_debug('Distribution (DISTRIB_ID)', distrib)
message.sub_debug('Release (DISTRIB_RELEASE)', release)
# Remove files, by name, that we know we must repopulate if they exist.
message.sub_info('Cleaning up')
cleanup_files = ['casper/filesystem.squashfs', 'casper/initrd.lz', \
'casper/vmlinuz', 'casper/vmlinuz.efi', 'casper/filesystem.manifest', \
'casper/filesystem.size']
cleanup_files.extend(glob.glob('.disk/casper-uuid-*'))
for sfile in cleanup_files:
full_file = misc.join_paths(config.ISO_DIR, sfile)
if os.path.exists(full_file):
message.sub_debug('Removing', full_file)
os.unlink(full_file)
# Define the checksum files, and the ISO filename.
md5sum_iso_file = misc.join_paths(config.WORK_DIR, 'md5sum')
sha1sum_iso_file = misc.join_paths(config.WORK_DIR, 'sha1sum')
sha256sum_iso_file = misc.join_paths(config.WORK_DIR, 'sha256sum')
iso_file = '%s/%s-%s-%s.iso' % (config.WORK_DIR, distrib, arch, release)
if os.path.exists(iso_file):
message.sub_debug('Removing', iso_file)
os.unlink(iso_file)
if os.path.exists(md5sum_iso_file):
message.sub_debug('Removing', md5sum_iso_file)
os.unlink(md5sum_iso_file)
if os.path.exists(sha1sum_iso_file):
message.sub_debug('Removing', sha1sum_iso_file)
os.unlink(sha1sum_iso_file)
if os.path.exists(sha256sum_iso_file):
message.sub_debug('Removing', sha256sum_iso_file)
os.unlink(sha256sum_iso_file)
# Detect files needed for booting, the kernel, initramfs, xen and anything else.
detect_boot()
if not vmlinuz:
if config.PURGE_KERNEL:
message.sub_info('Re-installing kernel')
misc.chroot_exec(('apt-get', 'purge', '--yes', 'linux-image*', '-q'))
message.sub_debug("Kernel Selection Debug: {0}, {1}".format(type(config.KERNEL), config.KERNEL))
if config.KERNEL is not "default" or None:
misc.chroot_exec(('apt-get', 'install', '--yes', \
config.KERNEL, '-q'))
else: # use the kernel the user specified in the config.
if arch is not "amd64": # then use the 32bit 'linux-image-generic'
misc.chroot_exec(('apt-get', 'install', '--yes', \
'linux-image-generic', '-q'))
else: # use the amd64 'linux-signed-generic' for uEFI
misc.chroot_exec(('apt-get', 'install', '--yes', \
'linux-signed-generic', '-q'))
misc.chroot_exec(('apt-get', 'clean'))
else:
message.sub_info('Updating initramfs')
misc.chroot_exec(('update-initramfs', '-k', 'all', '-t', '-u'))
detect_boot()
if not initrd or not vmlinuz:
raise(message.exception('Missing boot file (initrd or vmlinuz)'))
else:
message.sub_info('Copying boot files')
message.sub_debug('Initrd', initrd)
message.sub_debug('Vmlinuz', vmlinuz)
misc.copy_file(initrd, misc.join_paths(config.ISO_DIR, 'casper/initrd.lz'))
# FIXME: extend to support grub
efi_boot_entry = False
isolinux_dir = config.ISO_DIR + '/isolinux'
if os.path.isdir(isolinux_dir):
for sfile in os.listdir(isolinux_dir):
if sfile.endswith('.cfg') and misc.search_file('vmlinuz.efi', isolinux_dir + '/' + sfile):
message.sub_debug('Found EFI entry in isolinux conf', sfile)
efi_boot_entry = True
if os.path.isdir(misc.join_paths(config.ISO_DIR, 'efi/boot')) or \
efi_boot_entry:
message.sub_debug('Copying EFI vmlinuz')
misc.copy_file(vmlinuz, misc.join_paths(config.ISO_DIR, \
'casper/vmlinuz.efi'))
os.link(misc.join_paths(config.ISO_DIR, \
'casper/vmlinuz.efi'), misc.join_paths(config.ISO_DIR, \
'casper/vmlinuz'))
# EFI Kernels are still loadable by grub, modern ISOs lack a bare vmlinuz.
# mkisofs/genisoimage -cache-inodes reuses hard linked inodes.
else:
misc.copy_file(vmlinuz, misc.join_paths(config.ISO_DIR, 'casper/vmlinuz'))
# We only need to copy the bare kernel if we're not using EFI at all.
# Copy optional boot-enablement packages onto the ISO, if found.
if mt86plus:
message.sub_debug('Memtest86+ kernel', mt86plus)
misc.copy_file(mt86plus, misc.join_paths(config.ISO_DIR, 'install/mt86plus'))
if xen_kernel:
message.sub_debug('Xen kernel', xen_kernel)
misc.copy_file(xen_kernel, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(xen_kernel)))
if xen_efi:
message.sub_debug('Xen EFI kernel', xen_efi)
misc.copy_file(xen_efi, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(xen_efi)))
if ipxe_kernel:
message.sub_debug('iPXE kernel', ipxe_kernel)
misc.copy_file(ipxe_kernel, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(ipxe_kernel)))
if ipxe_efi:
message.sub_debug('iPXE EFI kernel', ipxe_efi)
misc.copy_file(ipxe_efi, \
misc.join_paths(config.ISO_DIR, 'casper/' + os.path.basename(ipxe_efi)))
kernel_type = re.search('initrd.img-*.*.*-*-(.*)', initrd).group(1)
message.sub_debug('Kernel Variant Type', kernel_type)
message.sub_info('Extracting casper UUID')
confdir = config.FILESYSTEM_DIR + '/conf'
if os.path.isdir(confdir):
shutil.rmtree(confdir)
os.makedirs(confdir)
if common.is_gz_file(initrd):
message.sub_debug('Kernel Compression', "gzip without early microcode")
try:
misc.chroot_exec('zcat ' + initrd.replace(config.FILESYSTEM_DIR, '') + ' | cpio --quiet -id conf/uuid.conf', \
shell=True, cwd=config.FILESYSTEM_DIR)
misc.copy_file(confdir + '/uuid.conf', misc.join_paths(config.ISO_DIR, \
'.disk/casper-uuid-' + kernel_type))
finally:
shutil.rmtree(confdir)
else:
message.sub_debug('Kernel Compression', "gzip with early microcode")
try:
misc.chroot_exec('unmkinitramfs ' + initrd.replace(config.FILESYSTEM_DIR, '') + ' conf/', \
shell=True, cwd=config.FILESYSTEM_DIR)
misc.copy_file(confdir + '/main/conf/uuid.conf', misc.join_paths(config.ISO_DIR, \
'.disk/casper-uuid-' + kernel_type))
finally:
shutil.rmtree(confdir)
# Define some default compression parameters, including a 1MB blocksize for all compressors.
compression_parameters = ('-b', '1048576', '-comp', config.COMPRESSION)
if config.COMPRESSION == 'xz': # Append additional compression parameters for xz.
# Using the branch-call-jump filter provides a compression boost with executable code.
# This can save a hundred megabytes easily, on an 800MB ISO. The dictionary size must
# match the block size, and it's advisable to use larger block sizes, like 1MB or 4MB.
compression_parameters += ('-Xbcj', 'x86', '-Xdict-size', '100%')
message.sub_info('SquashFS Compression parameters', compression_parameters)
# Create the compressed filesystem
message.sub_info('Creating SquashFS compressed filesystem')
make_squash_fs = ('mksquashfs', config.FILESYSTEM_DIR, \
misc.join_paths(config.ISO_DIR, 'casper/filesystem.squashfs'), \
'-wildcards', '-no-recovery', '-noappend', \
'-ef', os.path.join(sys.prefix, 'share/customizer/exclude.list'))
misc.system_command(make_squash_fs + compression_parameters)
message.sub_info('Checking SquashFS filesystem size')
sfs_size = os.path.getsize(misc.join_paths(config.ISO_DIR, \
'casper/filesystem.squashfs'))
message.sub_debug('SquashFS filesystem size', sfs_size)
if sfs_size > 4000000000:
raise(message.exception('The SquashFS filesystem size is greater than 4GB'))
message.sub_info('Creating filesystem.size')
fs_size = 0
for root, subdirs, files in os.walk(config.FILESYSTEM_DIR):
for sfile in files:
sfull = os.path.join(root, sfile)
if os.path.islink(sfull):
continue
# FIXME: respect ignored files from exclude.list
fs_size += os.path.getsize(sfull)
message.sub_debug('Root filesystem size', fs_size)
misc.write_file(misc.join_paths(config.ISO_DIR, \
'casper/filesystem.size'), str(fs_size))
message.sub_info('Creating filesystem.manifest')
lpackages = misc.chroot_exec(('dpkg-query', '-W', \
'--showformat=${Package} ${Version}\\n'), prepare=False, mount=False, \
output=True)
if isinstance(lpackages, bytes): # For some reason this is of type 'bytes'.
if int(sys.version_info[0]) >= 3: # If we're running under python3
lpackages = str(lpackages, 'utf-8')
else: # Otherwise just cast it to a str without the 'utf-8' option.
lpackages = str(lpackages)
message.sub_debug('Packages', lpackages)
misc.write_file(misc.join_paths(config.ISO_DIR, \
'casper/filesystem.manifest'), lpackages)
# FIXME: do some kung-fu to check if packages are installed
# and remove them from filesystem.manifest-remove if they are not
# Creating a md5sum.txt file fixes lubuntu's integrity check.
md5sums_file = misc.join_paths(config.ISO_DIR, 'md5sum.txt')
if os.path.isfile(md5sums_file):
message.sub_info('Creating md5sum.txt')
misc.write_file(md5sums_file, '')
for sfile in misc.list_files(config.ISO_DIR):
if sfile.endswith('md5sum.txt'):
continue
if sfile.endswith('SHA256SUMS'):
continue
message.sub_debug('MD5 Checksumming', sfile)
checksum = misc.generate_hash_for_file('md5', sfile)
misc.append_file(md5sums_file, checksum + ' .' + \
sfile.replace(config.ISO_DIR, '') +'\n')
# Creating a SHA256SUMS file fixes ubuntu-mini-remix's integrity check.
shasums_file = misc.join_paths(config.ISO_DIR, 'SHA256SUMS')
if os.path.isfile(shasums_file):
message.sub_info('Creating SHA256SUMS')
misc.write_file(shasums_file, '')
for sfile in misc.list_files(config.ISO_DIR):
if sfile.endswith('md5sum.txt'):
continue
if sfile.endswith('SHA256SUMS'):
continue
message.sub_debug('SHA256 Checksumming', sfile)
checksum = misc.generate_hash_for_file('sha256', sfile)
misc.append_file(shasums_file, checksum + ' .' + \
sfile.replace(config.ISO_DIR, '') +'\n')
# Create the ISO filesystem
message.sub_info('Creating ISO')
os.chdir(config.ISO_DIR)
misc.system_command(('xorriso', '-as', 'mkisofs', '-r', '-V', \
distrib + '-' + arch + '-' + release, '-isohybrid-mbr',\
'/usr/lib/ISOLINUX/isohdpfx.bin', '-b', 'isolinux/isolinux.bin', \
'-c', 'isolinux/boot.cat', '-J', '-l', '-no-emul-boot', \
'-boot-load-size', '4', '-boot-info-table', '-o', iso_file, \
'-cache-inodes', '-input-charset', 'utf-8', '.'))
message.sub_info('Creating ISO checksums')
md5checksum = misc.generate_hash_for_file('md5', iso_file)
message.sub_info('ISO md5 checksum', md5checksum)
misc.append_file(md5sum_iso_file, md5checksum + ' .' + \
iso_file.replace(config.WORK_DIR, '') +'\n')
sha1checksum = misc.generate_hash_for_file('sha1', iso_file)
message.sub_info('ISO sha1 checksum', sha1checksum)
misc.append_file(sha1sum_iso_file, sha1checksum + ' .' + \
iso_file.replace(config.WORK_DIR, '') +'\n')
sha256checksum = misc.generate_hash_for_file('sha256', iso_file)
message.sub_info('ISO sha256 checksum', sha256checksum)
misc.append_file(sha256sum_iso_file, sha256checksum + ' .' + \
iso_file.replace(config.WORK_DIR, '') +'\n')
message.sub_info('Successfuly created ISO image', iso_file)