components/bootstrap_cdebootstrap

   1 #!/usr/bin/python3
   2
   3 ## live-build(7) - Live System Build Components
   4 ## Copyright (C) 2006-2013 Daniel Baumann <mail@daniel-baumann.ch>
   5 ##
   6 ## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
   7 ## This is free software, and you are welcome to redistribute it
   8 ## under certain conditions; see COPYING for details.
   9
  10
  11 import argparse
  12 import configparser
  13 import glob
  14 import os
  15 import shutil
  16 import subprocess
  17 import sys
  18
  19
  20 # TODOs:
  21 #   * logfile output
  22 #   * lockfile handling
  23 #   * use gettext for i18n
  24 #   * cdebootstrap-options from config
  25 #   * take mirrors from config/archives/debian.{bootstrap,chroot}
  26
  27 def main():
  28         ## Parsing Arguments
  29         arguments = argparse.ArgumentParser(
  30                 prog            = 'lb bootstrap_cdebootstrap',
  31                 usage           = '%(prog)s [arguments]',
  32                 description     = '''live-build contains the components to build a live system from a configuration directory.
  33                                      The bootstrap_cdebootstrap command bootstraps the chroot system with cdebootstrap.''',
  34                 epilog          = 'See \'man lb_bootstrap_cdebootstrap\' for more information.',
  35                 formatter_class = argparse.ArgumentDefaultsHelpFormatter
  36         )
  37
  38         arguments.add_argument('--version',              help='show program\'s version number and exit', action='version', version='live-build 4')
  39         arguments.add_argument('--verbose',              help='set verbose option',                      action='store_true')
  40         arguments.add_argument('--cdebootstrap-options', help='set cdebootstrap(1) options' )
  41
  42         args = arguments.parse_args()
  43
  44         ## Parsing Configuration
  45         if not os.path.isfile('config/build'):
  46                 print('E: config/build - no such file', file=sys.stderr)
  47
  48                 sys.exit(1)
  49
  50         config = configparser.ConfigParser()
  51
  52         config.read('config/build')
  53
  54         try:
  55                 architecture     = config.get('Image', 'Architecture')
  56                 distribution     = config.get('Image', 'Parent-Distribution')
  57                 mirror_bootstrap = config.get('Image', 'Parent-Mirror-Bootstrap')
  58         except:
  59                 distribution     = config.get('Image', 'Distribution')
  60                 mirror_bootstrap = config.get('Image', 'Mirror-Bootstrap')
  61
  62         # --verbose
  63         verbose = args.verbose
  64
  65         # --cdebootstrap-options
  66         cdebootstrap_options_late = distribution + ' chroot ' + mirror_bootstrap
  67
  68         cdebootstrap_options_early = ''
  69
  70         if (architecture) and (not architecture == 'auto'):
  71                 cdebootstrap_options_early = cdebootstrap_options_early + ' --arch=' + architecture
  72
  73         if args.cdebootstrap_options:
  74                 cdebootstrap_options = cdebootstrap_options_early + ' ' + args.cdebootstrap_options + ' ' + cdebootstrap_options_late
  75         else:
  76                 cdebootstrap_options = cdebootstrap_options_early + ' ' + cdebootstrap_options_late
  77
  78         ## Calling cdebootstrap
  79
  80         # stagefile
  81         if os.path.isfile('.build/bootstrap'):
  82                 if verbose:
  83                         print('I: bootstrap already done - nothing to do')
  84
  85                 sys.exit(0)
  86
  87         # dependencies
  88         if not os.path.isfile('/usr/bin/cdebootstrap'):
  89                 print('E: /usr/bin/cdebootstrap - no such file', file=sys.stderr)
  90
  91                 if verbose:
  92                         print('I: cdebootstrap can be optained from:\n'
  93                               'I:   http://anonscm.debian.org/gitweb/?p=users/waldi/cdebootstrap.git\n'
  94                               'I:   http://ftp.debian.org/debian/pool/main/c/cdebootstrap/\n'
  95                               'I: On Debian based systems, cdebootstrap can be installed with:\n'
  96                               'I:   # sudo apt-get install cdebootstrap')
  97
  98                 sys.exit(1)
  99
 100         # clean
 101         if os.path.exists('chroot'):
 102                 print('E: chroot already exists - unclean build', file=sys.stderr)
 103
 104                 if verbose:
 105                         print('I: use \'lb clean\' to clean up a previously incomplete build')
 106
 107                 sys.exit(1)
 108
 109         # stage cache
 110         if os.path.exists('cache/bootstrap'):
 111                 if verbose:
 112                         print('I: Copying cache/bootstrap to chroot')
 113
 114                 # Notes:
 115                 #  * there's no Python equivalent to 'cp -a' that handels both symlinks and device nodes properly.
 116                 cache = subprocess.call('cp -a cache/bootstrap chroot', shell=True)
 117
 118                 os.makedirs('.build', exist_ok=True)
 119                 open('.build/bootstrap', 'w').close()
 120
 121                 sys.exit(0)
 122
 123         # packages cache
 124         if glob.glob('cache/packages.bootstrap/*.deb'):
 125                 if verbose:
 126                         print('I: Copying cache/packages.bootstrap/*.deb to chroot/var/cache/bootstrap/*.deb')
 127
 128                 # Notes:
 129                 #   * copy instead of move to make cache survive incomplete build
 130                 os.makedirs('chroot/var/cache/bootstrap', exist_ok=True)
 131
 132                 for package in glob.glob('cache/packages.bootstrap/*.deb'):
 133                         os.link(package, os.path.join('chroot/var/cache/bootstrap/' + os.path.basename(package)))
 134         else:
 135                 # cdebootstrap
 136                 if verbose:
 137                         print('I: Calling \'/usr/bin/debootstrap --download-only ' + cdebootstrap_options + '\'')
 138
 139                         # Notes:
 140                         #   * calling cdebootstrap twice:
 141                         #     - to use already downloaded /var/cache/bootstrap/*.deb on incomplete builds
 142                         #     - to use /var/cache/boottrap/*.deb for debian-installer
 143                         cdebootstrap = subprocess.call('/usr/bin/cdebootstrap --download-only ' + cdebootstrap_options, shell=True)
 144
 145                 # package cache
 146                 if glob.glob('chroot/var/cache/bootstrap/*.deb'):
 147                         if verbose:
 148                                 print('I: Copying chroot/var/cache/bootstrap/*.deb to cache/packages.bootstrap')
 149
 150                         # Notes:
 151                         #   * remove first to keep cache minimal
 152                         #   * remove files instead of directory to work with symlinked directory
 153                         for package in glob.glob('cache/packages.bootstrap/*.deb'):
 154                                 os.remove(package)
 155
 156                         os.makedirs('cache/packages.bootstrap', exist_ok=True)
 157
 158                         for package in glob.glob('chroot/var/cache/bootstrap/*.deb'):
 159                                 shutil.copy2(package, 'cache/packages.bootstrap')
 160
 161         # cdebootstrap
 162         if not os.path.exists('chroot/bin'):
 163                 if verbose:
 164                         print('I: Calling \'/usr/bin/debootstrap ' + cdebootstrap_options + '\'')
 165
 166                 cdebootstrap = subprocess.call('/usr/bin/cdebootstrap ' + cdebootstrap_options, shell=True)
 167
 168         # stage cache
 169         if not os.path.exists('cache/bootstrap'):
 170                 if verbose:
 171                         print('I: Copying chroot to cache/bootstrap')
 172
 173                 # Notes:
 174                 #  * there's no Python equivalent to 'cp -a' that handels both symlinks and device nodes properly.
 175                 cache = subprocess.call('cp -a chroot cache/bootstrap', shell=True)
 176
 177         # stagefile
 178         os.makedirs('.build', exist_ok=True)
 179         open('.build/bootstrap', 'w').close()
 180
 181
 182 if __name__ == '__main__':
 183         main()