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107 lines
4.1 KiB
Python
107 lines
4.1 KiB
Python
from collections import namedtuple
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import os
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import shlex
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import subprocess
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import tempfile
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ConfigDmgtools = namedtuple('Config', 'dmg hfsplus newfs_hfs verbose')
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ConfigHdiutil = namedtuple('Config', 'hdiutil verbose')
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def chunks(l, n):
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"""
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Yield successive n-sized chunks from l.
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From https://stackoverflow.com/a/312464.
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"""
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for i in range(0, len(l), n):
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yield l[i:i + n]
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class Dmg:
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def __init__(self, config):
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self.config = config
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def _check_call(self, process_args, *args, **kwargs):
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if self.config.verbose >= 1:
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print("EXECUTING {}".format(" ".join(shlex.quote(x) for x in process_args)))
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if not (self.config.verbose >= 2 and "stdout" not in kwargs):
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kwargs["stdout"] = open(os.devnull, 'wb')
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subprocess.check_call(process_args, *args, **kwargs)
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class Dmgtools(Dmg):
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def _mkfs_hfs(self, *args):
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self._check_call((self.config.newfs_hfs,) + args)
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def _hfs(self, *args):
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self._check_call((self.config.hfsplus,) + args)
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def _dmg(self, *args):
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self._check_call((self.config.dmg,) + args)
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def _create_hfs(self, hfs, volume_name, size):
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if self.config.verbose >= 1:
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print("TRUNCATING {} to {} bytes".format(hfs, size))
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with open(hfs, 'wb') as f:
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f.truncate(size)
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self._mkfs_hfs('-v', volume_name, hfs)
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def _symlink(self, hfs, target, link_name):
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self._hfs(hfs, 'symlink', link_name, target)
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def _add(self, hfs, directory):
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self._hfs(hfs, 'addall', directory)
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def _finish(self, hfs, dmg):
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self._dmg('build', hfs, dmg)
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def create(self, dmg, volume_name, directory, symlinks):
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input_size = sum(os.stat(os.path.join(path, f)).st_size for path, dirs, files in os.walk(directory) for f in files)
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output_size = max(input_size * 2, 1024**2)
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hfs = tempfile.mktemp(prefix=dmg + '.', suffix='.hfs')
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self._create_hfs(hfs, volume_name, output_size)
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self._add(hfs, directory)
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for target, link_name in symlinks:
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self._symlink(hfs, target, link_name)
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self._finish(hfs, dmg)
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if self.config.verbose >= 1:
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print("REMOVING {}".format(hfs))
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os.remove(hfs)
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class Hdiutil(Dmg):
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def _hdiutil(self, *args):
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self._check_call((self.config.hdiutil,) + args)
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def create(self, dmg, volume_name, directory, symlinks):
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if symlinks:
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raise NotImplementedError("symlinks are not yet implemented")
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self._hdiutil('create', '-volname', volume_name, '-srcdir', directory, dmg)
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def main():
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import argparse
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p = argparse.ArgumentParser(description="Manipulate dmg archives")
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subcommands = p.add_subparsers(help="Subcommand", dest='command', metavar="COMMAND")
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subcommands.required = True
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create = subcommands.add_parser("create", help="Create a dmg archive from files or directories")
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create.add_argument('-v', '--verbose', action='count', help="Verbose output")
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createx = create.add_mutually_exclusive_group(required=True)
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createx.add_argument('--dmgtools', nargs=3, help="Paths to the dmg and hfsplus executable (https://github.com/mozilla/libdmg-hfsplus) and the newfs_hfs executable (http://pkgs.fedoraproject.org/repo/pkgs/hfsplus-tools/diskdev_cmds-540.1.linux3.tar.gz/0435afc389b919027b69616ad1b05709/diskdev_cmds-540.1.linux3.tar.gz)")
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createx.add_argument('--hdiutil', help="Path to the hdiutil (only exists for macOS at time of writing)")
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create.add_argument('output', metavar="OUTPUT", help="Filename of the output dmg archive")
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create.add_argument('volume_name', metavar="VOLUME_NAME", help="Name of the dmg archive")
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create.add_argument('directory', metavar="DIR", help="Directory to create the archive from")
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create.add_argument('--symlink', metavar="SYMLINK", nargs=2, action="append", help="Symlink the first argument under the second name")
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args = p.parse_args()
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verbose = args.verbose or 0
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symlinks = args.symlink or []
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if args.dmgtools:
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dmg, hfsplus, newfs_hfs = args.dmgtools
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dmg = Dmgtools(ConfigDmgtools(dmg=dmg, hfsplus=hfsplus, newfs_hfs=newfs_hfs, verbose=verbose))
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elif args.hdiutil:
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dmg = Hdiutil(ConfigHdiutil(hdiutil=args.hdiutil, verbose=verbose))
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else:
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raise RuntimeError("unreachable")
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dmg.create(volume_name=args.volume_name, directory=args.directory, dmg=args.output, symlinks=symlinks)
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if __name__ == '__main__':
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main()
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